High precision AT type thermistor
■ FEATURES
· High exchangeability
· Superior solderability and resistance to soldering heat shock
· The wide operation temperature ranges to +125℃ from –40℃
· Moisture resistant
· Low cost and small size
· Excellent quality and high stability by mass production
· Environment friendliness.
■ APPLICATIONS
· Temperature sensor ,mobile cell, charger , electronic clinical thermometer, electronic perpetual calendar,
and so on.
■ PART NUMBERING
FH - HWF ××× × ×××× × ×
① ② ③ ④ ⑤ ⑥ ⑦
① Fenghua Thermistor Components branch company
② AT type thermistor of NTC code
③ Rated zero-power resistance（R25） unit:Ω
The first two are significant figure of resistance and the third one expresses number of following zeros
④ Tolerance of R25（%）
Code F G H J X
Tolerance of R25 ±1.0 ±2.0 ±3.0 ±5.0 Specific
tolerance
⑤ B value Code
⑥ Tolerance of B value（%）
Code E F G H J X
Tolerance of
B
±0.5 ±1.0 ±2.0 ±3.0 ±5.0 Specific
tolerance
⑦ B value Temperature Code
Code A B C D E F G H M N
T1/T225/50 25/ 85 0/25 0/50 0/100 0/80 25/100 -18/25 -20/25 5/25
■ APPEARACE AND DIMENSIONS
Shape parameter
High precision AT type thermistor
（mm）Dimensions
T (max.) D (max.) F(max.) d
Lead Style
4.0 3.5 3
■ PRODUCT SERIES
Part No.
No Load
Resistance at
25℃（ kΩ）
B-Constant
(K)
Dissipation
Constant at
25℃
（mW/℃）
Thermal Time
Constant
(S)
Operating Temperature
Range（℃）
FH-HWF502F3274FA 5 3274 2～4 ≤ 20 -50～+250
FH-HWF502F3470FA 5 3470 2～4 ≤ 20 -50～+250
FH-HWF103F3470FA 10 3470 2～4 ≤ 20 -50～+250
FH-HWF103F3700FA 10 3700 2～4 ≤ 20 -50～+250
FH-HWF152F3850FA 1.5 3850 2～4 ≤ 20 -50～+250
FH-HWF153F3950FA 15 3950 2～4 ≤ 20 -50～+250
FH-HWF233F4200FA 23 4200 2～4 ≤ 20 -50～+250
FH-HWF503F4055FB 50 4055 2～4 ≤ 20 -50～+250
FH-HWF104F3990FB 100 3990 2～4 ≤ 20 -50～+250
NOTE：We can produce all kinds of AT type thermistors of NTC with various parameters and good performance
for user needs.
■ PACKAGING
■ REEL DIMENSIONS
■ AMMO and REEL PACKAGING QUANTITY
30
0±
±5
5
0.45±
±0
0.
.1
1 Ordering for user needs
