MELF Resistors MELF Resistors Resistors MELF Resistors Welwyn Components Welwyn Components WRM Series WRM Series WRM Series High reliability * *High reliability High reliabilitypulse Predictable pulse handling capability AEC-Q200 handling capability * *Predictable Predictable pulse handling capability High reliability Tolerances down 0.1% down toto 0.1% * *Tolerances Tolerances down to 0.1% capability Predictable pulse handling TCR down 5 ppm/C down toto 5 ppm/C * *TCR TCR down to 5 ppm/C Tolerances down to 0.1% TCR down to 5 ppm/C All parts are Pb-free and comply with EU Directive 2011/65/EU (RoHS2) ElectricalData Data Electrical WRM 0102 WRM 0102 WRM 0204 WRM 0204 WRM 0207 WRM 0207 Po Pow erwreartirnagtinag t 7a0t 7C0C watwtsatts 0.20.2 0.205.25 0.40.4 ResRisetsainstcaenrcaenrgaenge ohs ms ohm - 1M0 8R240R 40R - 1M0 200 200 - 51M1 R22R22 - 5M 2 200 00 -M 10 M R22R2-210 2 5 0 250 , 5100 0, 100 5,150,10 5,1255, ,2550, , 5100 0, 100 15,1255,,2550, elem LimLitim inigtineg lem ntevnotltvaoglteage voltvsolts TCRTCR pp/m ppm C/C 15,15, 25,25, 50,50, 100100 %% ResRisetsainstcaentcoeletroalenrcaence Standard values Standard values al pim TheTrhmearm l im edpaendcaence k/Wk/W btietnetmtepm AmAbm ien erpaeturareturraenrgaenge 250250 C C lantiorensirsetsainstcaence InsuInlastuio Zero ohm jumper current rating Zero ohm jumper current rating Zero ohm jumper maximum residual resistance Zero ohm jumper maximum residual resistance 0.25, 0.1,0.1, 0.25, 0.5,0.5, 1, 51, 5 & E96 E24E24 & E96 200200 to +155 -55-55 to +155 140140 to +125 -55-55 to +125 1010 >10>10 ohs ms ohm amps amps mm 2 2 4 4 15 15 PhysicalData Data Physical Dimensions (mm) weight Dimensions andand weight (g) (g) Dimensions (mm) and weight (g) Type Type Type LL L maxmax max D D D maxmaxmax D1 D1 D1 max maxmax K min L1 K K minmin min Weight Weight Weight WRM 0102 WRM 0102 WRM 0102 2.3 2.32.3 1.351.35 1.35 0.3 WRM 0204 WRM 0204 WRM 0204 3.7 3.73.7 1.551.55 1.55 1.3 1.31.3 1.55 1.55 1.55 0.5 0.30.3 1.1 0.50.5 1.5 0.010.01 0.01 0.020.02 0.02 WRM 0207 WRM 0207 WRM 0207 6.1 6.16.1 2.4 2.42.4 2.4 2.42.4 0.5 0.50.5 2.9 0.08 0.08 0.08 Construction Construction A metal is deposited onto a high dissipation ceramic A metal filmfilm is deposited onto a high dissipation ceramic former to which tin plated teminating caps are fitted. former to which tin plated teminating caps are fitted. resistor is adjusted value a helical in the TheThe resistor is adjusted to to value by by a helical cutcut in the filmfilm body is protected a lacquer coating. andand thethe body is protected by by a lacquer coating. Marking Marking Resistance values colour coded with four bands, Resistance values areare colour coded with four bands, three indicating value indicating multiplier. three indicating value andand oneone indicating thethe multiplier. (Note describes standard marking, certain values (Note thisthis describes standard marking, butbut certain values may supplied with addition a tolerance band may stillstill be be supplied with thethe addition of aoftolerance band following multiplier.) following thethe multiplier.) L L D1D1 D D L1 L1 K K Terminations Terminations Material Plated steel cap. Material Plated steel cap. SolderabilityTheThe pure finish produces ageing Solderability pure tin tin finish produces ageing freefree contacts which melting solders contacts on on which lowlow melting solders cancan used. Dipped area shall covered with be be used. Dipped area shall be be covered with a smooth bright solder coating after a smooth andand bright solder coating after 3 seconds immersion at 215C. 3 seconds immersion at 215C. Solvent Resistance Solvent Resistance body protection marking resistant normal TheThe body protection andand marking areare resistant to to all all normal industrial cleaning solvents suitable printed circuit boards. industrial cleaning solvents suitable forfor printed circuit boards. General General Note Note TT Electronics reserves the right to make changes in product specification without notice or liability. All All information information isis subject subject to to TT TT Electronics' Electronics' own own data data and and isis considered considered accurate accurate at at time time of of going going to to print. print. BI Technologies IRC Welwyn www.ttelectronics.com/resistors www.ttelectronics.com/resistors (c) (c) TT TT Electronics Electronics plc plc 03.18 11.17 09.17 MELF MELF Resistors Resistors WRM Series WRM Series Welwyn Components MELF MELF Resistors TCR and Tolerance Range Resistors WRM Series WRM Series Type Reference Tolerance 100ppm 5% 10R - 1M0 1.0% 10R - 1M0 50ppm 25ppm TCR 15ppm 100ppm 50ppm 100ppm 25ppm 50ppm 15ppm 25ppm 10ppm 15ppm 05ppm 100ppm 100ppm 50ppm 50ppm 25ppm 25ppm 15ppm 15ppm 10ppm 10R - 1M0 R22 - R91 5% 10R -- 1M0 10R -- 1M0 R22 - R91 R22 - R91 -- 10R - 1M0 100R - 82K 100R - 56K 1.0% 1R - 5M1 10R--500K 1M0 4R7 10R -- 1M0 100R - 82K 100R - 56K 1R - 5M1 1R-10M 4R7 - 500K 10R - 1M -- TCR and Tolerance Range WRM0102 Type Reference WRM0204 WRM0102 WRM0207 WRM0204 Welwyn Components TCR 05ppm - range -10C to +85C. * TC 10ppm & 5ppm is specified over the temperature 100ppm R22 - R91 50ppm 1R-10M WRM0207 25ppm 10R - 1M Performance Data Test 15ppm - - 0.5% - 0.25% - 0.1% - 8R2 - 1M0 100R - 100K Tolerance 100R - 56K 0.5% 10R - 1M6 10R - -500K 8R2- -221K 1M0 10R 100R - 100K 100R - 56K 10R - 1M6 10R - 1M6 10R - 500K 10R - 680K 10R - 221K 51R1 -- 10K 100R - 82K 100R - 56K 0.25% 22R - 332K 22R - -402K 22R - -221K 100R - 82K 22R - 221K 100R - 56K 100R - 100K 22R - 332K 22R - 402K 51R1 - 330K 22R - 221K 51R1 10K 22R -- 221K 100R - 82K 100R - 56K 0.1% 43R - 332K 43R - -332K 43R - -221K 100R - 82K 43R - 221K 100R - 56K 100R - 100K 43R - 332K 43R - 332K 100R - 100K 43R - 221K 100R 10K 43R -- 221K 10R - 1M6 100R - 100K - 100R - 100K - 10R - 680K 51R1 - 330K 100R - 100K R/R - 10K Results R/R 51R1 51R1 - 10K 100R - 10K 0204 to and 0207 0204 & 0207: 10R - <75R * TC 10ppm & 5ppm is specified over the temperature range -10C +85C. 0204 & 0207: 75R - 100K Test 10R - <75R & & >100K - 332K 100K + 0.01 Short time overload* >100K Performance Data75R -0.05% Bending test* Short me overload* Test Resistance to soldering heat Bending test* Temperature rapid change Resistance to soldering Endurance* heat Short time overload* Load life Temperature Bending test* rapid 1000h 8000 h change Resistance to soldering heat Climatic sequence* Endurance* Temperature rapid change Damp heat steady state* Load life 1000h Endurance* Current noise 8000h Load life 1000h Solderability 225,000h 8000 h Climac sequence* Climatic sequence* Voltage coefficient Damp heatsteady steadystate* Damp heat Voltage proof state* Current noise - 332K <10R & >332K 0.1% + 0.01 0.05% +0.05% 0.01+ 0.01 0.1% + 0.01 0.1% + 0.01+ 0.25% 0.05 Results R/R 0.05% + 0.01 0.1% + 0.01 0.05% + 0.01 0.1% + 0.01 0.25% + 0.05 0204&0.1% 0207:+10R - <75R 0.05% 0.01- 0.01 0204 & 0207:+ 75R 100K - 332K 0.05% + 0.01 0.1% + 0.01 & >100K 0.25% + 0.05 0.05% + 0.01 0.1% + 0.01 0.25% + 0.05 0.25% + 0.05 0.05% + 0.01 0.1% + 0.01 0.05 0.05%+0.5% 0.01+ 0.05 0.1% + 0.01 0.5% 0.25% + 0.05+ 0.05% + 0.01 0.1% + 0.01 0.25% + 0.05 0.5% + 0.05 0.05% + 0.01 0.1% + 0.01 0.25% + 0.05 0.5% + 0.05 0102: 0102 40R - 1M0, 0204 & 0207: R22 - <10R & >332K - 10M All values 0.25% + 0.05 0.25% + 0.05 0.25% + 0.05 0.25% + 0.05 0.25% + 0.05 0102: 40R - 1M0, 0.25% + 0.050204 & 0207: R22 +- <10R 0.25% 0.05& >332K - 10M 0.25% + 0.05 0.5% + 0.05 0.25% + 0.05 0.25% + 0.05 1.0% + 0.05 0.25% + 0.05 1.0% + 0.05 0.25% + 0.05 1.0% + 0.05 0.15% + 0.05 0.15% + 0.05 0.3 % + 0.05 0.5% + 0.05 < 0.05 V/V < 0.25 V/V < 3 V/V 0.3%+0.25% 0.05 + 0.05 0.3% + 0.05 0.25% 0.6 % + 0.05 1.0% +0.5% 0.05 + 0.05 + 0.05 Dipped area shall be covered with a smooth 0.9 % + 0.5% 0.05+ 0.05 0.9% + 0.05 0.5% 1.8% + 0.05 3.0% + 0.05 + 0.05 1.0% + 0.05 and bright solder coating of at least 96% 1.0% + 0.05 1.0% +1.0% 0.05 0.5% + 0.05 + 0.05 < 0.5 . 106/V 0.25% + 0.05 0.5% + 0.05 1.0% + 0.05 0.25% + 0.05 0.5% + 0.05 + 0.05 1.0% + 0.05 No flashover1.0% or breakdown < 0.05 V/V < 0.25 V/V < 3 V/V 0.25%+0.25% 0.05 + 0.05 0.5% + 0.05 * Resistors according to IEC <0.25V/V 115-1, Current <0.05V/V Solderabinoise lito ty be mounted on a PC-board Dippeclause d area s4.27.1 hall be c<3V/V overed with a smooth <3V/V * AEC-Q200 approval applies to all values up to and including 3M4 at TCRs above 5ppm/C and to zero ohm jumpers Solderability and >95% brightcoverage solder coating of at least 96% Voltage Voltage ccoefficient oefficient Voltage pproof roof Voltage 0 to -0.5ppm/V < 0.5 . 106/V No flashover or breakdown No flashover or breakdown * Resistors to be mounted on a PC-board according to IEC 115-1, clause 4.27.1 * AEC-Q200 approval applies to all values up to and including 3M4 at TCRs above 5ppm/C and to zero ohm jumpers General General Note Note TT Electronics reserves the right to make changes in product specification without notice or liability. All All information information isis subject subject to to TT TT Electronics' Electronics' own own data data and and isis considered considered accurate accurate at at time time of of going going to to print. print. (c) Components Limited Bedlington, Northumberland NE22 7AA, UK (c) TT plc (c)Welwyn TT Electronics Electronics plc BI Technologies IRC Welwyn Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com www.ttelectronics.com/resistors www.ttelectronics.com/resistors 01.11 11.17 03.17 09.17 03.18 MELF MELF MELF MELF MELF Resistors MELF Resistors Resistors Resistors Resistors WRM Series Resistors WRM Series Welwyn Components Welwyn Components Welwyn Components Welwyn Components WRM Series WRM WRM Series Series WRM Series Single Pulse Single Pulse Maximum Pulse Load Single Pulse Maximum Pulse Load Single Pulse Maximum Pulse Load WRM 0102 0102 WRM 0204 WRM 0207 0102 0204 WRM WRM 0102 WRM 0204 0207 WRM 0207 0204 WRM 0207 Pulse Pulse Pulse Load Load P max P max P max Pulse Load PLoad max Maximum Pulse Load 100 100 W 100 W 100 W 10 W 10 10 10 1 1 1 1 0,1 0,1 10 s 0,1 10 s 0,1 10 s 100 s 1 ms 100 s 100 s 1 ms 1 ms 10 ms Pulse Duration 10 ms 10 s 100 s 1 ms Pulse Duration 10 ms 10 ms ti ti ti ti 100 ms 1s 10 s 100 ms 100 ms 1s 1s 10 s 10 s 100 ms 1s 10 s Pulse Duration Continuous Pulses Pulse Duration Continuous Pulses Maximum Pulse Load Continuous Pulses Changes to add zero ohm jumpers to WRM Maximum Pulse Load Continuous Maximum PulsePulses Load Continuous Continuous Pulse Pulse Load Load P max P max Continuous Pulse Load P max Continuous Pulse Load P max Maximum Pulse Load WRM 0102 1. Electrical Data Table - add 2 rows to bottom of table: 0102 WRM 0204 100 100 100 W 100 W W 10 Zero ohm jumper current rating Zero10ohm jumper maximum residual resistance 10 W 10 WRM 0207 0102 0204 WRM WRM 0207 0204 0102 WRM WRM WRM0102 0207 0204 WRM 0207 amps m 2 WRM0204 15 WRM0207 4 1 1 1 1 0,1 0,1 10 s 0,1 10 s 0,1 10 s 100 s 1 ms 100 s 100 s 1 ms 1 ms 10 ms 10 ms Pulse Duration 10 ms 100 ms 1s 10 s 100 ms 100 ms 1s 1s 10 s 10 s 1s 10 s ti Pulse Duration ti 100 ms 10 s 100 s 1 ms 10 ms Pulse Duration ti Packaging Pulse Duration ti Packaging 2. Replace Ordering Procedure section: The WRM 0102 and 0204 resistors are supplied reeled on 8mm blister tape. Packaging The WRM and are 0204 resistors supplied reeled 8mm blister tape. WRM 02070102 resistors supplied onare 12mm blister tape.on Packaging The WRM 0102 and 0204 resistors are supplied reeled on 8mm blister tape. WRM 0207 resistors are supplied on 12mm blister tape. The WRM andwith 0204 resistors supplied WRM 02070102 resistors are supplied onare 12mm tape.on 8mm blister tape. Packaging complies the requirements ofblister IECreeled 286-3. WRM 0207complies resistorswith are supplied on 12mmofblister tape. Packaging the requirements IEC 286-3. Packaging complies with the requirements of IEC 286-3. Packaging complies with the requirements of IEC 286-3. Ordering Procedure Ordering Procedure Ordering Procedure Ordering Procedure Example: WRM0204 at 1 kilohm, 1%(WRM0204, tolerance and 50ppm/C, 50ppm/C TCR a reel 1%, of 3000 pieces Example: WRM0204C-1K0FI 1 on kilohm Pb-free) Ordering Procedure Example: WRM0204 at 1 kilohm, 1% tolerance and 50ppm/C TCR on a reel of 3000 pieces WRM0204-R000I (WRM0204, zero ohm jumper, Example: WRM0204 at 1 kilohm, 1% tolerance and 50ppm/C TCR on aPb-free) reel of 3000 pieces - Type WRM 0204 C - and 1K050ppm/C F I on a reel of 3000 pieces Example: WRM0204 at 1 kilohm, 1% tolerance TCR Type WRM 0204 C - 1K0 F I Type WRM 0204 C - 1K0 F I Size Type WRM 0204 C - 1K0 F I Size W R M 0 2 0 4 C 1 K 0 F I Size TCR Size TCR 1 2 3 4 5 TCR 0102 Z 100ppm/C Y 15ppm/C 0102 Z 100ppm/C Y 15ppm/C TCR I Tape 0204 T 10ppm/C C 50ppm/C Z 100ppm/C Y 15ppm/C T 10ppm/C C 50ppm/C 1 2 Z 100ppm/C Y 15ppm/C V D 25ppm/C T 5ppm/C 10ppm/C C 50ppm/C V 5ppm/C D 25ppm/C Type TCR 10ppm/C C 25ppm/C 50ppm/C VT 5ppm/C D Value (use IEC62 code) V 5ppm/C DWRM0102 25ppm/C V = 5ppm/C Value (use IEC62 code) Value (use IEC62 T code) = 10ppm/C WRM0204 Tolerance (use IEC62 code) Value (use(use IEC62 Tolerance IEC62 code) Y code) = 15ppm/C WRM0207 Tolerance (use IEC62 B 0.1% D 0.5% code) J 5% D = 25ppm/C Tolerance B 0.1% (use D IEC62 0.5% code) J 5% 3 4 Value Tolerance B = 0.1% C = 0.25% D = 0.5% F = 1% R000 = Jumper J = 5% Omit for Jumper 3/4 characters R = ohms K = kilohms M = megohms Packing Packing Packing 3000 / reel (7") 3000 / reel (7") Packing Standard 0102 3000 3000 // reel reel (7")* (7") I Tape 5 0204 3000 / reel (7")* Standard 0102 3000 3000 // reel 0207 1500 reel (7")* (7") I Tape 0204 Standard 0207 1500 / reel (7") * High parts may be0204 supplied on 1000/piece reels - please Standard enquire I precision Tape 3000 reel (7")* Packing 0207 1500 / reel (7") * High precision parts may be supplied on 1000 piece reels - please enquire 0207 1500 / reel (7") * High precisionIparts may be supplied on 1000 piece reels - please enquire = Standard 0102 0204 0207 3000 / 7" reel 3000 / 7" reel1 1500 / 7" reel * High precision parts may be supplied on 1000 piece reels - please enquire C F 1% B 0.25% 0.1% D 0.5% J 5% C = 50ppm/C C 0.25% F 1% B 0.1% D 0.5% J 5% C 0.25% F Z 1% = 100ppm/C C 0.25% F 1% Omit forLimited JumperBedlington, Northumberland NE22 7AA, UK (c) Welwyn Components Telephone: +44Components (0) 1670 822181Limited * Facsimile:Bedlington, +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com (c) Welwyn Northumberland NE22 7AA, UK Note 1: +44 High precision parts* Facsimile: may beBedlington, supplied on 1000 piece reels - please (c) Welwyn Components Northumberland NE22 7AA, UK enquire Telephone: (0) 1670 822181Limited +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com (c) Welwyn Components Limited Bedlington, Northumberland NE22 7AA, UK Telephone: +44 (0) 1670 822181 * Facsimile: +44 (0) 1670 829465 * Email: info@welwyn-tt.com * Website: www.welwyn-tt.com General GeneralNote Note BI BI Technologies Technologies TT TTElectronics Electronicsreserves reservesthe theright rightto tomake makechanges changesininproduct productspecification specificationwithout withoutnotice noticeor orliability. liability. All Allinformation informationisissubject subjectto toTT TTElectronics' Electronics'own owndata dataand andisisconsidered consideredaccurate accurateat attime timeof ofgoing goingto toprint. print. 01.11 01.11 01.11 01.11 IRC Welwyn Welwyn BI Technologies IRC www.ttelectronics.com/resistors www.ttelectronics.com/resistors (c) (c)TT TTElectronics Electronicsplc plc 11.17 09.17 03.18