07/29/98 WED 14:48 FAX 814 781 7968 NTC THERMISTORS: INRUSH CURRENT LIMITERS KEYSTONE THERMO. 300V DC 230V AC LINE nev > 1. a th ALTERNATE LOCATION The circuit diagram above dispiays a typical way to limit inrush current. Protection against extremely high peak inrush current, especially in AC/OC switching power supplies, is now available with Keystone Thennometrics Inrush Current Limiters. These special NTC thermistors effectively con- trol surge currents because the thermal time constant of the current limiter is longer than the electrical time con- stant (RC) of the thermistor and the capacitor. ~|B tT 25 4 = REF. | c [ FIG. 1 FIG. 2 (SUFFIX A) All inrush current limiters are insulated with a protective coating. Optional lead designs available upon request. Note: For Figure 2 design add A suffix to type. (Example: CL-10A.) Max. , (max) Eqn. Const. Approx. Res. Under Load at % y tarads for Res. Under Load" Max. Rated Current R,@ | Sute 25C | Current] A B Cc D Current Diss. | Time ype ames max, | max. | ref. @ 120 | @240 _ Range Const. | Const 9.1 | (ohms) | (RMS) | (in) | (in) | fin} [away] vac | vac | x | Y | Min t/Mawi | 25% | sox | 75% | 100% | (mWrC)] {sec} ne Heiter | 07 | 12 or | o22 {as2a| 18 | e200] 2000] oso [tte aosisi2 | 4 ft: 06 Te | ce [2s | 100 sere | 13 | 8 | 055 | 021 [oses| 18 | 2600] Goo | O40 | -125 | a0si<e0] 25 | 09 | 06 | .o4] 15 | 60 cw} 25 | 8 0.77 |_o22 | osea! 1a | e000] 1500] oa: | 128] a5<iseo] 34] 14 | 09 | os | 25 | 100 Clo | 5 6 77 | 022 [0.928] 18 | S200] 300] 109] -1a7[a5cicso| 65 | 27] 16] 11 | 25 [| 100 ciso | 7 5 0.77 | 026 [oses} 16 | sooo] 1250] 128 | -127 | 1.5<is5o[ 96 | 40] 2 | 16) as | 120 ct-eo_| 10 5 a77 | 022 [osee| 18 | sooo} i250] 1.45 | 130] 12sisso] 100 | 44 { 26]. 18] 2 | 100 CL-70_| 16 4 o.77 | o22 | og2a{ 18 | sooo] 1250] 155 | -126] 1.0<tsa0] 1.85 | 65 | a9 | 27] 25 | 100 Cio | 47 3 o.77 | 0.22 |og2a{ ie | sooo] i250 | 2.03 | 129] o5<isaq] 204 | 120} 71} 49 | 2 | 100 Ci-90_| 120 2 0.93 | 022 |o.320| 1a | sooo] izso | 304 | -1.38 | o5sis20 | 700 | 306 | 1.75 | 1.18-[ 30 | 120 sosddd setor| as [is [osa | o22 Toszs| ta [ano] sono [oss [te [eosicis | o9 | 04} os | 2] so | 120 CL-110 | 10 32 | 040] 017 [ozo] 26 | soo] 1s0| 083 | 129 fo7<i<a2] 110] 45] 27] ta] 8 30 Ci-120 | 10 17__ [040 | 017 Jo2so] 24 | soo} 150] 061 | 1.09 [oasisi7] 155 | 7a] a | 34 4 50 CL-130 | 50 16 | 045 | 0.17 Jozso] 24 [ 600] 190] 1.45 | -1.38 | ossicig | $13 |] 107] 1.19] 75] a8 x | Gi] so. | 44 [045 | 017 ozs] 24 | soo] 150] 1.01 | 128 | o2si<ia | 527 | 217 | i128] ag} 4 90 GL150 [5 47 | 055 | 018 | o328] 22 | 1600] 400] 081 | 126] 10si<a7] 66 | 27] 16] 11 | 15 | 10 | a-160] 5 28 | 055 | 018 [osee| 22 | 1600] 400] aco] -i05[ossi<2a| 7 | <2] 27] 20] 9 | 130 C1170 | 16 27 | 055 | o18 [osea| 22 | re00| 400] 1.18 | -1.28 | ossis27| 195 | ao] 46] sa] 15 | 110 Ci-180 | 16 1.7 [085 | 018 | oses[ 22 | 1600[ 400 | og2 | -t.18 | ossisi7| 252] 1.11] 69] 49] 9 | 130 GL190 {28 24 | 088 {| 018 J os2e| 22 | eoof t7o | 133 | te fossi<24 | 263 [ 104] eof att is [10 CL-200.[ 25 17 [058 | 016 [osee] 22 | soo] 170[ 095 | 126 [oasisi7| 274] 118] 70] 49] 9 | 190 CL-210. 30 15 040 { 0.20 | 0260] 24 GOO} 150] 1.02 | -1.85 | O9si<i5 | 383 { 1.50 87 0 8 x * These values are suggetied maximums based on the thermistor in ac arpbient withoul air Now. Current ratings can be increased d2dending on the magnitude of ir How. ~* These ratings are suggesicd maximums. Contact Keystone Themmometrica Enginsering Departmant lor aeeislince in appicition; exceeding These ratings. " To daterming the resistance value under oad. use A - Xl where and are constants In the table above _ ANA | is the curredd lamps}. co ee t t { ' W 4 fx fe hi = 4 7671 Post-it* Fax Note RE a wu HHH seinen sivinangsenee oun ans vetabadBt een w tenan Stench