disc type ntc thermistors type: ertd n derating curve for the ntc thermistor for the ntc thermistor operated in ambient derated in accordance with the right figure. ambient temperature (?c) rated load (%) e r t d w n explanation of part numbers n features l excellent electrical and thermal stability ntc thermistors (disc type) n recommended applications l temperature detection l temperature compensation for measuring instruments l temperature compensation for deflection coil in tv disc type negative temperaturecoefficient thermistors. resistance values from 8 w to 150 k w and b values are from 3000 k to 5000 k. l wide selection of temperature coefficients temperature above 25 ?c, power rating should be rev.02/04
n ratings and characteristics ertd2fe l ] 200s 20 3000 2.18 ? ertd2ff l ] 400s 40 3200 2.30 ? ertd2fg l ] 750s 75 3700 2.62 1 ertd2ff l ] 101s 100 3500 2.48 ? ertd2fg l ] 101s 100 3700 2.62 2 ertd2fg l ] 171s 170 3700 2.62 3 ertd2ff l ] 251s 250 3500 2.48 ? ertd2fg l ] 251s 250 3900 2.76 4 ertd2fg l ] 301s 300 3900 2.76 ? ertd2ff l ] 351s 350 3500 2.48 5 ertd2fg l ] 601s 600 4000 2.83 6 ertd2fg l ] 801s 800 3900 0.4 4.5 20 2.76 7 ertd2fg l ] 102s 1000 3700 2.61 ? ertd2fg l ] 142s 1400 3900 2.76 ? ertd2fg l ] 202s 2000 4000 2.83 8 ertd2fg l ] 332s 3300 4000 2.83 9 ertd2fh l ] 462s 4600 4100 2.90 ? ertd2fh l ] 802s 8000 4100 2.90 10 ertd2fh l ] 103s 10000 4100 2.90 ? ertd2fh l ] 153s 15000 4200 2.98 11 ertd2fh l ] 333s 33000 4500 3.22 12 ertd2fh l ] 503s 50000 4500 3.22 13 ertd2fi l ] 154s 150000 4800 3.48 14 ertd3fe l ] 8r0s 8 3000 2.18 15 ertd3ff l ] 130s 13 3200 2.30 16 ertd3ff l ] 160s 16 3200 2.30 ? ertd3ff l ] 200s 20 3200 2.30 ? ertd3ff l ] 300s 30 3200 2.30 ? ertd3ff l ] 400s 40 3200 2.30 ? ertd3fg l ] 750s 75 3700 0.6 7.0 27 2.62 ? ertd3fg l ] 800s 80 3700 2.62 ? ertd3fg l ] 131s 130 3700 2.62 ? ertd3fg l ] 501s 500 4000 2.83 ? ertd3fh l ] 402s 4000 4100 2.90 ? ertd3fh l ] 203s 20000 4500 3.22 ? ertd3fi l ] 803s 80000 5000 3.70 17 ] resistance tolerance code ]] tolerance of b value: 10 % b= k n (r 25 /r 50 ) 1/298.15e1/323.15 r 25 =resistance at 25.0 ?c r 50 =resistance at 50.0 ?c l operating temperature range: e 30 to + 125 ?c heat zero-power b value ]] maximum dissipation thermal time resistance table part no. resistance (k) permissible constant constant ratio a/b at 25 ?c( w ) power(w) (mw/?c) (s) r 25 /r 50 curve no. ntc thermistors (disc type) jk l 5 % 10 % 15 %
n dimensions in mm (not to scale) straight lead type f type crimped lead type z type f type f dt k w f d d2 5.00.5 1.30.5 30.0 min. 2.51.0 0.4 d3 7.50.5 1.40.5 30.0 min. 5.01.0 0.5 z type f dt u e h w f d d2 5.00.5 1.30.5 3.0 max. 4.51.0 6.0 max. 5.01.0 0.5 (nom.2.5) (nom.5.0) n resistance vs. temperature (table a) n voltage vs. current (table b) w w w w w w ntc thermistors (disc type)
p 12.71.0 p 0 12.70.3 p 1 3.850.70 p 2 6.351.30 f d 0.500.05 f 5.01.0 ? h 05.0 w 18.0 +1.0 w 0 12.5 min. w 1 9.00 +0.75 w 2 3.0 max h 21.02.0 h 0 16.00.5 k 2.0 max. f d 0 4.00.3 t 0.50.2 n resistance color code 1(1st digit) 2(2nd digit) 3(multiplier) code color black 0 0 10 0 brown 1 1 10 1 red 2 2 10 2 orange 3 3 10 3 yellow 4 4 10 4 green 5 5 10 5 blue 6 6 10 6 purple 7 7 10 7 gray 8 8 10 8 white 9 9 10 9 gold ? ? 10 e1 silver ? ? 10 e2 e0.5 e0.50 n taping dimensions in mm (not to scale) taping type ntc thermistors (disc type)
ntc thermistors (disc type) disc type ntc thermistors the disc type ntc thermisters (hereafter referred to as the ntc thermistors) may fail in burnout, flaming or glowing in the worst case, when subjected to severe conditions of electrical, environmental and/or mechanical stresses. 1. precautions for safety 1.1 operating power 1.2 operating temperature range 1.3 plastic molding and potting 1.4 environmental conditions f) 1.5 mounting 1.6 fail-safe design for equipment 2.application notes 2.1 soldering flux rosin-based and non-activated type soldering flux is recommended. 2.2 post soldering cleaning 2.3 abnormal mechanical stresses 2.4 soldering 2.5 long term storage (5) store them indoors under 40 ?c max. and 75 %rh max. handling precautions safety precautions safety precautions and application notes should be taken into consideration. for any the following questions regarding the handling precautions, please contact our engineering section or factory. t h e n t c t h e r m i s t o r s should not be operated beyond their specified maximum permissible power in the catalog or the individual specifications, otherwise , burnout or damages due to the thermal run awa could result. (if operated in ambient temperature above 25 ?c, power rating should be derated in accordance with the derating curve. ) the ntc thermistors should not be operated beyond their specified operating temperature range of in the catalog or the individual specifications. (do not touch the heated part of the ntc themistors by hand during operation) in case of plastic molding or potting, the ntc thermistors may be damaged or deteriorated by extreme mechanical stresses such as expanding and shrinking forces caused by the heat treatment of the plastics applied (depending on curing conditions and types of plastics) the ntc thermistors should not be operated and/or stored under the following environmental conditions; a ) direct exposure to water or drops of water. b ) direct exposure to sunlight. c ) under conditions of high humidity or water condensation. d ) direct exposure to oil, gasoline or organic solvent and/or atomospheres of them. e ) under conditions of deoxidized or corrosive atomospheres such as chlorine, hydrogen sulfide, sulfur oxide or vinyl chloride. under severe conditions of extreme vibration or shock. do not let other parts touch the thermistors because other coating is not a generated insulator. pending on the cleaning condition and type of cleaning solvent. the ntc thermistors may be damaged or deteriorated, when dropped or exposed to a large impact. excessive shock and impact should not be applied. the element to the melting point of solder. ( 1 ) w h e n s o l d e r i n g the thermistor, solder for as short time as possible to minimize the exposure time of take into account the solder-heat resistance of the product before use. ( 2 ) in soldering the device, the body and outer coating section should not be touched by molten solder and/or heated iron tip. ( 1 ) ntc thermistors should not be stored under severe conditions of high temperature and/or high humidity. ( 2 ) ntc thermistors should not be stored under conditions of corrosive atomospheres such as hydrogen s u l f i d e , s ulfur oxide, chlorine, and ammonia etc. ( 3 ) ntc thermistors should not be exposed to direct sunlight. ( 4 ) ntc thermistors should not be stored under conditions of condensation. use them within one year of manufacture and check the solderability before use. in case of solvent cleaning, outer coating material of the ntc thermistors may acquire the solvent, de- in application of the termistors, equipment should be protected against deterioration and failures of the thermistors.
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