Introduction of on-board thermistors The on board thermistors are available in several different packages, from chip and melf for surface mount, to axial and radial leaded for through the hole mounting. On-board thermistors Series Type Termination TS03 Operating temperature range Resistance range 252K -40100 Solder plated 302M TN05, TC05, TH05 10k470k TN11, TH11 SMD chip TN10, TC10 TN20, TC20, TH20 402M SC05 472k SC10 1k10k MN18, MH18 MELF FH10 Flakechip 30150k -40125 Tin plating -40150 2k150k -40125 10k,100k Au Electrode CN25, CH25 Soldered Cu-Ni wire RM16, RH16 Polyurethane covered wire PVC covered wire -4080 10k Soldered Cu-Ni wire -40100 300200k Dumet wire -40300 150 10k10M Ni Ni-plating or Solder plating -40300& -40150 2k1M Radial leaded BN35 DC30 GR15 GA13, GH13 Axial leaded GA20, GH20 301M -40110 1k1M 2k1M Part number system TN05 - Series NTC THERMISTOR 3T 103 J B B B Value Resistance Resistance tolerance Packing form 2523 Resistance value at 25C is expressed in ohms. First two digits are signifi cant and the last digit is the numbers of zeros following. Resistance tolerance. Packing form Code Packing form G H J K L Resistance tolerance 1 2 3 5 10 15 1 3 5 Packing Qty. 200 Bulk F B B Value tolerance 500 B Code Related series TN05, TC05, TH05, TN10, TC10, TN11, TH11 TN20, TC20, TH20, SC05, SC10, MN18, MH18, GA13, GH13, GA20, GH20 CN25, CH25, RM16, RH16, GR15 100 DC30 T Paper taping 4,000 TN11, TH11, TN10, TC10, TN20, TC20, TH20, SC10 P Plastic taping 2,000 MN18,MH18 F Flat pack 2,000 GA13,GH13,GA20,GH20,DC30 10,000 TN05,TC05,TH05,SC05 Paper taping 15,000 TS03 R D 43 SMD Type Using our company's unique materials, product design, and manufacturing technologies, we have been able to produce smaller and increasingly precise surface mount thermistors. This has enabled us to create a full line of parts to meet various characteristic and size requirements. TH Hight precision type TH Series TN*TC*TS Hight reliability type TN * TC * TS Series Applications TCXO Mobile telecomunication IT Battery pack Features Series TNTCTS TN,TC,TS Series B Ultra small size, low capacitance. High B values available. TH TH Series Small size, high precision. Strong against electrostatic discharge. LCD PC*PAD OA SC Standard type SC Series -B SC SC Series Various combination of resistance value and B-value. Printer, Facsimile, Copier TNTC TN,TC Series Full lineup. Custom types available. Applications TCXO TCXO Temperature compensated crystal oscillator (TCXO) Chip thermistor is used for temperature compensation of TCXO, which is a key device for mobile phones. Li For low temp. R X'tal NTC R Quartz oscillator Th1TC05-2S400J40,2750K Th2TC05-4C302J3k,4100K IC Protection IC T R 44 NTC C NTC Li-ion battery pack Fuse Battery cells For high temp. C Battery pack Chip thermistor with high precision is used for the protection circuit inside the battery pack for mobile electronic devices. - Discharge control Recharge control FET FET ThTH11-3H103F10k1,3370K1 NTC THERMISTOR CD AV VCR, Video camera, Car audio Product lineup TN20 TN20 Series TC20 TC20 Series TH20 TH20 Series 2.0x1.25 More precise (1%) TN10 TN10 Series TC10 TC10 Series More precise (1%) TH05 TH05 Series 1.0x0.5 Smaller Thinner TN11 TN11 Series TH11 TH11 Series 1.6x0.8 Standard type High performance type mm Size(mm) SC10 SC10 Series Ultra small TN05 TN05 Series TC05 TC05 Series More precise (1%) Ultra small SC05 SC05 Series Ultra small TS03 TS03 Series 0.6x0.3 T T series S S series (Wafer process) (Sheet process) Dimensions Glass sealed Thermistor element Electrode mm Electrode Series TS03 T T W NTC THERMISTOR L1 L W L1 L TS*TN*TC*TH Series L W T L1 0.600.04 0.300.04 0.300.04 0.10min. 0.05 TNTCTHSC05 1.000.15 0.50-0.10 TNTCSC10 TNTH11 TNTCTH20 0.05 0.50-0.10 0.20min. 1.600.15 0.800.15 0.95max. 0.30min. 1.600.15 0.800.15 0.70max. 0.30min. 2.000.20 1.250.20 1.25max. 0.40min. SC Series NEW TS03 B TS03 Series 0.6x0.3x0.34maxmm 5 10R25 3B2550 -40100 Dimensions Resistance tolerance B value tolerance Termination Operating temperature range 0.6x0.3x0.34max(mm) 5%,10%(R25) 3%(B25/50) Solder plated nickel barrier -40C~+100C Features 0.6x0.3mm B Ultra small size(0.6x0.3x0.34max(mm)) Corresponding to the high B value Glass sealed body for high reliability Solder plated terminations for easy mounting Characteristics TS03 TS03 Series Type 2S250 2S300 2S400 R25 Resistance 25 30 40 BB25/50 B Value 2,750K 2,750K 2,750K Type 4C102 4C152 4C202 BB25/85 B Value 2,754K 2,754K 2,754K 45 R25 Resistance 1.0k 1.5k 2.0k BB25/50 B Value 4,100K 4,100K 4,100K BB25/85 B Value 4,048K 4,048K 4,048K [High reliability type] TNTC05 B TN*TC05 Series Dimensions Resistance tolerance B value tolerance Termination Operating temperature range Heat dissipation Power rating 1.0x0.5x0.55maxmm 5 10R25 3B2550 -40125 2.4mW 240mW 1.0x0.5x0.55max(mm) 5%,10%(R25) 3%(B25/50) Tin plated nickel barrier -40C~+125C 2.4mW/C 240mW Features TCXO BTC05 Ultla small size. Suitable for TCXO applications because of the low capacitance. High B value available.(TC05 Series) Tin plated terminations for easy mounting. Glass sealed body for high reliability. Full lineup for various applications. Characteristics TN05 TN05 Series R25 Resistance BB25/50 B Value BB25/85 B Value Type R25 Resistance BB25/50 B Value BB25/85 B Value 3C102 1.0k 3,110K 3,124K 3V223 22k 3,900K 3,898K 3E152 1.5k 3,200K 3,214K 3N333 33k 3,650K 3,725K 3G222 2.2k 3,290K 3,298K 4B473 47k 4,050K 4,057K 3H302 3.0k 3,370K 3,375K 3 I 473 47k 3,400K 3,490K 3 I 332 3.3k 3,420K 3,425K 3J683 68k 3,450K 3,492K 3L472 4.7k 3,530K 3,528K 3K803 80k 3,500K 3,543K 3N682 6.8k 3,670K 3,657K 3L104 100k 3,540K 3,578K 3H103 10k 3,370K 3,413K 3M154 150k 3,620K 3,668K 3T103 10k 3,820K 3,792K 4W205 2M 4,950K 4,984K 4B153 15k 4,030K 3,985K BB25/50 B Value BB25/85 B Value Type R25 Resistance BB25/50 B Value BB25/85 B Value TC05 TC05 Series Type R25 Resistance 2S300 30 2,750K 2,769K 2S151 150 2,750K 2,769K 2S400 40 2,750K 2,769K 4C202 2.0k 4,100K 4,048K 2S680 68 2,750K 2,769K 4C272 2.7k 4,100K 4,048K 2S820 82 2,750K 2,769K 4C302 3.0k 4,100K 4,048K 2S101 100 2,750K 2,769K 4C332 3.3k 4,100K 4,048K 2S121 120 2,750K 2,769K 4V105 1M 4,900K 4,909K 46 NTC THERMISTOR Type TNTC10 B TN*TC10 Series 1.6x0.8x0.95maxmm 5 10R25 3 5B2550 -40125 3.0mW 300mW Dimensions 1.6x0.8x0.95max(mm) Resistance tolerance B value tolerance Termination Operating temperature range Heat dissipation Power rating 5%,10%(R25) 3%,5%(B25/50) Tin plated nickel barrier -40C~+125C 3.0mW/C 300mW Features TCXO BTC10 Suitable for TCXO applications because of the low capacitance. High B value available.(TC10 Series) Tin plated terminations for easy mounting. Glass sealed body for high reliability. Full lineup for various applications. Characteristics TN10 TN10 Series Type NTC THERMISTOR R25 Resistance BB25/50 B Value BB25/85 B Value Type R25 Resistance BB25/50 B Value BB25/85 B Value 2D300 30 2,150K 2,155K 3K222 2.2k 3,500K 3,499K 2H680 68 2,350K 2,380K 3N332 3.3k 3,650K 3,633K 2R101 100 2,700K 2,724K 3S472 4.7k 3,750K 3,750K 2S121 120 2,750K 2,769K 3V682 6.8k 3,900K 3,868K 2T151 150 2,800K 2,813K 4C103 10k 4,100K 4,048K 2V221 220 2,900K 2,901K 3U153 15k 3,850K 3,870K 3A331 330 3,000K 3,025K 3K223 22k 3,500K 3,643K 3C471 470 3,100K 3,125K 3J333 33k 3,450K 3,494K 3D681 680 3,150K 3,181K 3K473 47k 3,500K 3,537K 3F102 1k 3,250K 3,260K 3M683 68k 3,600K 3,645K 3 I 152 1.5k 3,400K 3,399K 3R104 100k 3,700K 3,743K 3S154 150k 3,750K 3,797K TC10 TC10 Series Type R25 Resistance BB25/50 B Value BB25/85 B Value Type R25 Resistance BB25/50 B Value BB25/85 B Value 2R820 82 2,700K 2,724K 3K182 1.8k 3,500K 3,499K 2S101 100 2,750K 2,769K 4C202 2k 4,100K 4,048K 2V181 180 2,900K 2,901K 4C302 3k 4,100K 4,048K 47 TN11 TN11 Series 1.6x0.8x0.70maxmm Dimensions 1.6x0.8x0.70max (mm) 5 10R25 Resistance tolerance 5%,10%(R25) B 3B2550 B value tolerance 3%(B25/50) Termination Tin plated nickel barrier -40125 Operating temperature range -40C~+125C 3.0mW Heat dissipation 3.0mW/C 300mW Power rating 300mW Features Small and thin size. TCXO Suitable for TCXO applications because of the low capacitance. Tin plated terminations for easy mounting. Glass sealed body for high reliability. Full lineup for various applications. Characteristics TN11 TN11 Series R25 Resistance BB25/50 B Value BB25/85 B Value Type R25 Resistance BB25/50 B Value BB25/85 B Value 3H103 10k 3,370K 3,423K 3K683 68k 3,500K 3,534K 3V103 10k 3,910K 3,876K 3M104 100k 3,590K 3,628K 4C153 15k 4,110K 4,053K 4H104 100k 4,360K 4,360K 3T223 22k 3,820K 3,841K 3R154 150k 3,680K 3,723K 3K333 33k 3,480K 3,617K 3S224 220k 3,760K 3,806K 3J473 47k 3,440K 3,481K 3U334 330k 3,850K 3,904K 4B473 47k 4,050K 4,067K 3W474 470k 3,940K 3,998K 48 NTC THERMISTOR Type TN20TC20 B TN20*TC20 Series 2.0x1.25x1.25maxmm 5 10R25 3 5B2550 -40125 5.0mW 500mW Dimensions 2.0x1.25x1.25max (mm) Resistance tolerance B value tolerance Termination Operating temperature range Heat dissipation Power rating 5%,10%(R25) 3%,5%(B25/50) Tin plated nickel barrier -40C~+125C 5.0mW/C 500mW Features TCXO BTC20 Suitable for TCXO applications because of the low capacitance. High B value available.(TC20 Series) Tin plated terminations for easy mounting. Glass sealed body for high reliability. Full lineup for various applications. Characteristics TN20 TN20 Series Type NTC THERMISTOR R25 Resistance BB25/50 B Value BB25/85 B Value Type R25 Resistance BB25/50 B Value BB25/85 B Value 2N680 68 2,650K 2,673K 3H103 10k 3,370K 3,489K 2S101 100 2,750K 2,758K 3V103 10k 3,924K 3,914K 2T151 150 2,800K 2,813K 3N153 15k 3,650K 3,695K 2V221 220 2,900K 2,917K 3S223 22k 3,750K 3,786K 3A331 330 3,000K 3,019K 3W303 30k 3,950K 3,991K 3C471 470 3,100K 3,120K 3T333 33k 3,800K 3,839K 3E681 680 3,200K 3,218K 3U473 47k 3,850K 3,894K 3E102 1k 3,200K 3,221K 3W503 50k 3,950K 4,030K 3 I 152 1.5k 3,400K 3,403K 3N683 68k 3,650K 3,690K 3K202 2k 3,500K 3,469K 3R803 80k 3,700K 3,743K 3S332 3.3k 3,750K 3,731K 4C104 100k 4,100K 4,141K 3W472 4.7k 3,950K 3,909K 4D154 150k 4,150K 4,195K 4C682 6.8k 4,100K 4,044K 5A205 2M 5,000K 5,043K BB25/50 B Value BB25/85 B Value Type R25 Resistance BB25/50 B Value BB25/85 B Value 2,750K 2,758K 4C302 3.0k 4,100K 4,044K TC20 TC20 Series Type 2S400 R25 Resistance 40 49 [High precision type] TH05 TH05 Series B 1.0x0.5x0.55maxmm 1 2 3R25 1 2B2550 -40125 2.4mW 240mW Dimensions 1.0x0.5x0.55max (mm) Resistance tolerance B value tolerance Termination Operating temperature range Heat dissipation Power rating 1%,2%,3%(R25) 1%,2%(B25/50) Tin plated nickel barrier -40C~+125C 2.4mW/C 240mW Features Ultra small size. B1 High precision type.(1%) Strong against electrostatic discharge. Suitable for battery pack application.(Li-ion, Ni-MH etc) Tin plated terminations for easy mounting. Glass sealed body for high reliability Characteristics TH05 TH05 Series R25 Resistance BB25/50 B Value BB25/85 B Value Type R25 Resistance BB25/50 B Value BB25/85 B Value 3H103 10k 3,370K 3,413K 3N333 33k 3,650K 3,725K 3T103 10k 3,820K 3,792K 3I473 47k 3,400K 3,490K 4B153 15k 4,030K 3,985K 3J683 68k 3,450K 3,492K 4B473 47k 4,050K 4,057K 3L104 100k 3,540K 3,578K 3V223 22k 3,900K 3,989K 3M154 150k 3,620K 3,668K 4K474H 470k 4,500K 4,541K 50 NTC THERMISTOR Type TH11 TH11 Series B 1.6x0.8x0.70maxmm 1 2 3R25 1 2B2550 -40125 3.0mW 300mW 1.6x0.8x0.70max (mm) Resistance tolerance B value tolerance Termination Operating temperature range Heat dissipation Power rating 1%,2%,3%(R25) 1%,2%(B25/50) Tin plated nickel barrier -40C~+125C 3.0mW/C 300mW Features B1 High precision type.(1%) Strong against electrostatic discharge. Suitable for battery pack application.(Li-ion, Ni-MH etc) Tin plated terminations for easy mounting. Glass sealed body for high reliability Characteristics TH11 TH11 Series Type R25 Resistance BB25/50 B Value BB25/85 B Value Type R25 Resistance BB25/50 B Value BB25/85 B Value 3H103 10k 3,370K 3,423K 3K683 68k 3,500K 3,534K 3V103 10k 3,910K 3,876K 3M104 100k 3,590K 3,628K 4C153 15k 4,110K 4,053K 4H104 100k 4,360K 4,360K 3T223 22k 3,820K 3,841K 3R154 150k 3,680K 3,723K 3K333 33k 3,480K 3,617K 3S224 220k 3,760K 3,806K 3J473 47k 3,440K 3,481K 3U334 330k 3,850K 3,904K 4B473 47k 4,050K 4,125K 3W474 470k 3,940K 3,998K 4V105G 1M 4,900K 4,909K TH20 NTC THERMISTOR Dimensions TH20 Series B 2.0x1.25x1.25maxmm 1 2 3R25 1 2B2550 -40125 5.0mW 500mW Dimensions 2.0x1.25x1.25max (mm) Resistance tolerance B value tolerance Termination Operating temperature range Heat dissipation Power rating 1%,2%,3%(R25) 1%,2%(B25/50) Tin plated nickel barrier -40C~+125C 5.0mW/C 500mW Features B1 High precision type.(1%) Strong against electrostatic discharge. Suitable for battery pack application.(Li-ion, Ni-MH etc) Tin plated terminations for easy mounting. Glass sealed body for high reliability Characteristics TH20 TH20 Series Type R25 Resistance BB25/50 B Value BB25/85 B Value Type R25 Resistance BB25/50 B Value BB25/85 B Value 3H103 10k 3,370K 3,489K 3W503 50k 3,950K 4,030K 3V103 10k 3,924K 3,914K 3R803 80k 3,700K 3,743K 3W303 30k 3,950K 3,991K 3S104 100k 3,760K 3,806K 3M503 50k 3,590K 3,628K 51 [Standard type] SC05 B SC05 Series 1.0x0.5x0.55maxmm 5, 10R25 3B2550 -40125 2.4mW 240mW Dimensions 1.0x0.5x0.55max (mm) Resistance tolerance B value tolerance Termination Operating temperature range Heat dissipation Power rating 5%, 10%(R25) 3%(B25/50) Tin plated nickel barrier -40C~+125C 2.4mW/C 240mW Features Ultla small size. Tin plated terminations for easy mounting. Characteristics SC05 SC05 Series Type 3F470 3F680 R25 Resistance 47 68 BB25/50 B Value 3,250K 3,250K BB25/85 B Value 3,190K 3,190K R25 Resistance 1.5k 2.0k Type 4C152 4K202 BB25/85 B Value 4,103K 4,481K BB25/50 B Value 4,100K 4,500K Please consult us for availability of non-standard items. SC10 B SC10 Series 1.6x0.8x0.95maxmm 5,10R25 3B2550 -40125 3.0mW 300mW Dimensions 1.6x0.8x0.95max (mm) Resistance tolerance B value tolerance Termination Operating temperature range Heat disspation Power rating 5%, 10%(R25) 3%(B25/50) Tin plated nickel barrier -40C~+125C 3.0mW/C 300mW Features Tin plated terminations for easy mounting. Characteristics SC10 SC10 Series Type 4C102 4C152 4C222 R25 Resistance 1.0k 1.5k 2.2k BB25/50 B Value 4,100K 4,100K 4,100K R25 Resistance 2.2k 6.8k 10k Type 4K222 4K682 4K103 BB25/85 B Value 4,103K 4,103K 4,103K BB25/85 B Value 4,481K 4,534K 4,534K BB25/50 B Value 4,500K 4,490K 4,490K Please consult us for availability of non-standard items. FH10 FH10 Series NTC THERMISTOR NEW Dimensionsmm 0.55 or 0.600.10mm Electrode Au 0.55 or 0.600.10mm 0.3mm max 1%, 2%, 3%(R25) 1%(B25/50) Au -40C+125C 4mW/C 400mW 123R25 B 1B2550 -40125 4mW 400mW Resistance tolerance B value tolerance Termination Operating temperature range Heat disspation Power rating Features Au/Su300 Small precision type Long-life Reliability Excellent solderability,bondability Excellent stability against Au/Sn soldering process(about 300) Characteristics FH10 FH10 Series Type FH10-6E103 FH10-6Q103 FH10-3U104 Resistance Tolerance 3 1 2 Resistance R25 10k 10k 100k 52 BB25/50 B Value 3,950K 3,410K 3,950K Packing form Packing code Related series mm Unit : mm Packing Qty. Packing form Code A 180 RRM08B 0 -3 E B C D E W1 W2 r 60 1 -0 13.0 0.2 R10.5 0.4 2.0 0.5 9.0 0.3 11.4 1.0 0.5 A B F E B C r D TN05 TC05 TH05 SC05 W1 W2 A 10,000 T1 Round feed hole D0 Rectangular component mounting punch hole P2 P1 P2 P0 K Outfeeding direction With components mounted Code Loading hole D0 T1 2.00 0.05 4.0 0.1 0.8 max B C D E W1 W2 r 60 1 -0 13.0 0.2 R10.5 0.4 2.0 0.5 9.0 0.3 11.4 1.0 0.5 F E A T2 P1 2.0 0.1 0.9 Rectangular hole max B C 3.50 1.75 0.05 0.10 1.5 0.1 -0 180 RRM08B 0 -3 E 8.0 0.3 P0 J T2 W 0.62 1.15 0.10 0.10 F E Y R r D W1 W2 A 4,000 Round feed hole D0 Rectangular component mounting punch hole T2 P1 P2 P0 I A B W 1.65 0.2 1.1 0.2 2.4 0.2 1.9 0.2 8.0 0.3 P2 P0 D0 T1 2.00 0.05 4.0 0.1 1.5 0.1 -0 1.1 max F J G T1 H T TN11 TH11 TN10 TC10 TN20 TC20 TH20 SC10 Outfeeding direction With components mounted NTC THERMISTOR 3.50 1.75 0.05 0.10 P1 4.0 0.1 T2 Loading hole 1.4 Rectangular hole max TN11TH11TN10TC10 Dimensions in ( ) are for TN11, TH11, TN10, TC10. Code A B C D E W1 W2 r R10 180 0 -3 60 1 -0 13.0 0.2 R10.5 0.4 2.0 0.5 9.0 0.3 11.4 1.0 0.5 E B C r P MN18 MH18 2,000 D W1 W2 A B W F E P1 4.1 0.1 8.0 0.2 3.55 0.1 1.5 0.1 4.0 0.1 T2 Loading hole P2 P0 D0 T1 2.00 0.05 4.0 0.1 1.5 0.1 -0 0.5 max D E T2 T1 Round feed hole D0 Rectangular component mounting punch hole Rectangular 2.0 hole max B F E W With components mounted A 1.7 0.1 Outfeeding direction A A P1 P2 P0 E Code A 180 RRM08B 0 -3 B C B C 60 1 -0 13.0 0.2 A B R10.5 2.0 0.4 0.5 W1 W2 r 9.0 0.3 11.4 1.0 0.5 D r W F E P1 15,000 W1 W2 A Round feed hole D0 Rectangular component mounting punch hole 8.0 0.3 3.50 1.75 0.05 0.10 P2 P0 D0 T1 2.0 0.1 4.0 0.1 1.5 0.1 -0 0.4 max T2 2.0 0.1 Loading hole T1 0.37 0.67 0.08 0.08 TS03 D T2 With components mounted A P1 P2 P0 61 Outfeeding direction 0.5 Rectangular max hole Packing form mm Unit : mm Packing code B Related series Packing Qty. SMD Chip 500 MELF DC30 Radial leaded except DC30 Axial leaded 200 DC30 DC30 Series 100 Packing form Poly bag Feed direction (Side view) L R P F GA13 GH13 GA20 GH20 Z Code 2,000 t L S T L1 L2 W T S Dimensions Code Dimensions 0.2 GA13,GH132.5 -0.4 T 6.01.0 0.2 GA20,GH204.0 -0.4 Z 1.5max. R Not sticking out of tape 2.0 -1.0 W 52.0 P 5.00.5 t 3.2min. L1-L2 1.0max. S 0.8max. 37 Please refer to page 37 for soldering conditions. NTC THERMISTOR 62 Soldering conditions Series 250 230250 Temp. 200 150 100 130150 Soldering Cooling 260 200 150 100 50 150180 50 0 0 60120 60~120sec. 60120 60~120sec. 34 3~4sec. 34 3~4sec. T100 T110 1) Time shown in the above figures is measured from the point when chip surface reaches temperature. 1) Time shown in the above figures is measured from the point when chip surface reaches temperature. 2) Temperature difference in high temperature part should be within 100C. 2) Temperature difference in high temperature part should be within 110C. Reflow soldering conditions EutecticSolder Air preheat Temp. 250 200 LeadfreeSolder Soldering Cooling Air preheat 250 230250 150 130150 Soldering Cooling 260 200 150 100 150180 100 50 50 0 0 60120 60~120sec. 60120 60~120sec. 10 10sec. or less NTC THERMISTOR 60 60sec. or less Air preheat Temp. ) 250 LeadfreeSolder Soldering Cooling EMI FILTER Air preheat Temp. ) Flow soldering conditions EutecticSolder LFA20 LFA30 LFA341 LFB30 LZA10 1 LZA34 TS032 TN05 TC05 TH05 TN11 TH11 TN10 TC10 TN20 TC20 TH20 SC05 SC10 MN18 MH18 GA13 GA20 2 GH13 GH20 10 10sec. or less 60 60sec. or less T100 T110 1) Time shown in the above figures is measured from the point when chip surface reaches temperature. 1) Time shown in the above figures is measured from the point when chip surface reaches temperature. 2) Temperature difference in high temperature part should be within 100C. 2) Temperature difference in high temperature part should be within 110C. 1LFA34,LZA10,LZA34 2TS03,MN18,MH18,GA13,GA20,GH13,GH20 200 50 1LFA34,LZA10,LZA34arereflowonly. 2TS03,MN18,MH18,GA13,GA20,GH13,GH20aresolderplated. General attention to soldering High soldering temperatures and long soldering times can cause leaching of the termination, decrease in adherence strength, and the change of characteristic may occur. For soldering, please refer to the soldering curves above. Please use a mild flux(containing less than 0.2wt% Cl). Also, if the flux is water soluble, be sure to wash thoroughly to remove any residue from the underside of components, that could affect resistance. Cleaning When using ultrasonic cleaning, the board may resonate if the output power is too high. Since this vibration can cause cracking or a decrease in the adherence of the termination, we recommend that you use the conditions below. Frequency:40kHz max. Output power:20W/Iiter Cleaning time:5minutes max. 63 NTC NTC Thermistor basic properties NTC Negative temperature coeffcient(NTC)thermistors are manufactured from high purity and uniform materials to achieve a construction of near-perfect theoretical density. This ensures small size, tight resistance and B-value tolerances, and fast response to temperature variations, making a highly sensitive and precision component. Thermistor is available in a wide range of types to meet your demands for small size and high reliability. Resistance - temperature characteristic 1 The resistance and temperature characteristics of a thermistor can be approximated by equation 1. 1eq1 BIT-IT0 RR0exp R TK 0 K R0 T B B TKt273.15 R : resistance at absolute temperature T(K) R0 : resistance at absolute temperature T0(K) B : B value T(K)= t(C)+273.15 B 5K/ 1 The B value for the thermistor characteristics is not fixed, but can vary by as much as 5K/C according to the material composition. Therefore equation 1 may yield different results from actual values if applied over a wide temperature range. 1B2 By taking the B value in equation 1 as a function of temperature, as shown in equation 2, the difference with the actual value can be minimized. 2eq2 BTCT2DTE C,D,E BEC,D BE C, D, and E are constants. The B value distribution caused by manufacturing conditions will change the constant E, but will have no effect on constants C or D. This means, when taking into account the distribution of B value, it is enough to do it with the constant E only. C,D,E C,D,E4 T0,R0 T1,R1 T2,R2 T3,R3 36 T0T1,T2,T33B1,B2,B3 Calculation for constants C, D and E Using equations 3~6, constants C, D and E can be determined through four temperature and resistance value data points (T0, R0). (T1, R1). (T2, R2) and (T3, R3). With equation 3, B1, B2 and B3, can be determined from the resistance values for To and T1, T2, T3 and then substituted into the equations below. NTC THERMISTOR I n RnR0 I I - Tn T0 3eq3 Bn 4eq4 B1-B2 T2-T3-B2-B3 T1-T2 C T2-T3 T1-T3 T1-T2 5eq5 D 6eq6 EB1-DT1-CT1T1 B1-B2-CT1T2 T1-T2 T1-T2 255kB50K 1030 Example Using a resistance-temperature characteristic chart, the resistance value over the range of 10C~30C is sought for a thermistor with a resistance of 5k and a B value deflection of 50K at 25C. C,D,E Process Determine the constants C, D and E from the resistance-temperature chart. T025273.15T110273.15T220273.15T330273.15 BTCT2DTE50BT BT= CT2+TD+E+50 ; substitute the value into equation and solve for BT R R5expBTIT-I298.15 T10273.1530273.15 R= 5exp {BT (I/T-I/298.15)} ; substitute the values into equation and solve for R T : 10+273.15~30+273.15 68 Results of plotting the resistance-temperature characteristics are shown figure 1 1 Rt R25 150 100 75 50 25 0 -20 1 B(K) Bvalue(K) (1)1500 (2)2500 (3)3000 (4)3500 (5)4000 (6)4500 (1) 0.1 Resistance ratio (Rt / R25) 10 0.01 (2) (3) (4) (5) (6) 2.5 3 3.5 4 1/Tx10 K -3 1 RESISTANCE-TEMPERATURE CHARACTERISTIC(Fig. 1) Resistance temperature coefficient The resistance-temperature coefficient (=) is defined as the rate of change of the zero-power resistance associated with a temperature variation of 1C at any given temperature. The relationship between the resistance-temperature coefficient (=) and the B value can be obtained by differentiating equation 1 above. 1 K B1 I dR B x 100 -x 1002.1 R dT T2 NTC THERMISTOR A negative value signifies that the rated zero-power resistance decreases JISC2570 Heat dissipation constant (JIS-C2570) 1 T1T2P The dissipation constant (@) indicates the power necessary for increasing the temperature of the thermistor element by 1C through self-heating in a heat equilibrium. Applying a voltage to a thermistor will cause an electric current to flow, leading to a temperature rise in the thermistor. This " intrinsic heating " process is subject to the following relationship among the thermistor temperature T1, ambient temperature T2, and consumed power P. P mW 2.2 T1 - T2 PI2RIV Measuring conditions for all parts in this catalog are as follows: 25 Room temp is 25C Axial and radial leaded parts were measured in their shipping condition. Power rating (JIS-C2570) JISC2570 25 x25 The power rating is the maximum power for a continuous load at the rated temperature. For parts in this catalog, the value is calculated from the following formula using 25C as the ambient temperature. (formula) Rated power=heat dissipation constant x (maximum operating temperature-25C) 69 Maximum operating power JIS t tx...3.3 Definition : The power to reach the maximum operating temperature through self heating when using a thermistor for temperature compensation or as a temperature sensor. (No JIS definition exists.) The maximum operating power, when t C is the permissible temperature rise, can be calculated using the following formula. Maximum operating power= txheat dissipation constant... (3.3) JISC2570 Thermal time constant for changes in surrounding temperature (JIS-C2570) 63.2 T1T2t T A constant expressed as the time for the temperature at the electrodes of a thermistor, with no load applied, to change to 63.2% of the difference between their initial and final temperatures, during a sudden change in the surrounding temperature. When the surrounding temperature of the thermistor changes from T1 to T2, the relation between the elapsed time t and the thermistors temperature T can then be expressed by the following equation. 3.1 TT1-T2exp-tT2 exp-t T1 3.2 T2-T1 The constant J is called the heat dissipation constant. If t= J, the equation becomes : (T-T1) / (T2-T1) = 0.632 t T T1T2T10.632 63.2 t1 T - T1 T2 - T1 63.2 2 86.5 3 95.0 4 98.2 5 99.4 T2 Temp. (T) T t In other words, the above definition states that the thermal time constant is the time it takes for the temperature of the thermistor to change by 63.2% of its initial temperatrue difference. The rate of change of the thermistor temperature versus time is shown in table 1. t Time (t) Measuring conditions for parts in this catalog are as follows: 5025 34.2 T Part is moved from a 50C envirconment to a still air 25C environment until the temperature of the thermistor reaches 34.2C. Axial and radial leaded parts are measured in their shipping form. Please note, the thermal dissipation constant and thermal time constant will vary acccrding to environment and mounting conditions 70 NTC THERMISTOR T1 -1 Table-1 Thermal Time Constant 63.2