Radial Leaded Epoxy Resin Coated NTC Thermistor Temperature Sensor, 10K ohm, Beta B(25/50): 3950K, Temperature -40C to +125C.

AMWEI Product Number: AMF52-103F3950

Appearance and Dimension

Radial Resin NTC Thermistor Temperature Sensor

Unit: mm

Radial  Leaded Epoxy Resin Coated  NTC Thermistor Application

Temperature sensing, control and compensation. E.g. inlet air temperature sensing thermistors or ECT in
automotive applications, sensor elements in industrial and commercial applications, heating systems and industrial
systems, medical equipment.

Radial Leaded Epoxy Resin Coated NTC Thermistor Electric Perfomance

  • Resistance at 25C R25: 10K ohm+/-1%
  • Beta Value B(25/50): 3950K+/-1%
  • Optional R25 resistance tolerance,  ±1%(F), ±2%(G), ±3%(H), or ±5%(J)
  • Dissipation Factor: δ≥3mW/℃.
  • Thermal Time Constant (in still air): ≤12 seconds.
  • Rated Powerwatt (below 25C): ≤50mW
  • Insulation resistance: room temperature, 500V, 60 Seconds, ≥100MΩ.
  • Operating temperature range: -40 to +125C.

NTC 10K Ohm 3950K Resistance vs. Temperature RT Data

(K Ohm)
(K Ohm)
(K Ohm)
-40C 336.2 KΩ 20C 12.47 KΩ 80C 1.232 KΩ
-35C  242.1 KΩ 25C 10.00 KΩ 85C 1.051 KΩ
-30C 176.6 KΩ 30C 8.065 KΩ 90C 0.9027 KΩ
-25C 130.7 KΩ 35C 6.539 KΩ 95C 0.7788 KΩ
-20C 96.88 KΩ 40C 5.328 KΩ 100C 0.6741 KΩ
-15C 72.67 KΩ 45C 4.362 KΩ 105C 0.5851 KΩ
-10C 54.94 KΩ 50C 3.588 KΩ 110C 0.5091 KΩ
-5C 42.19 KΩ 55C 2.966 KΩ 115C 0.4440 KΩ
0C  32.79 KΩ 60C 2.463 KΩ 120C 0.3880 KΩ
5C 25.34 KΩ 65C 2.055 KΩ 125C 0.3397 KΩ
10C 19.83 KΩ 70C 1.724 KΩ
15C 15.66 KΩ 75C 1.454 KΩ

Radial Leaded, Epoxy Resin Coated NTC Thermistor Mechanical Test

Test Standard Test Conditions and methods Requirements
Soldering & Solderability IEC60068-2-20
Test Ta
Temperature: 230±5 ℃,
2-2.5mm away from ceramic body
On: 2±0.5 Seconds.
The terminations shall be evenly tinned
Resistant to soldering heat IEC60068-2-20
Test Tb
Temperature: 260±5℃,
2-2.5mm away from ceramic body
On:10±1 Seconds.
No visible damage,
Lead wire tensile IEC60068-2-21
Test U
Test Ua: Force 10N, On 10 Seconds;
Test Ub: Bending 90C, Force 5N, Twice.
No break off,

Radial Leaded Epoxy Resin Coated NTC Thermistor Reliability Data

Test Standard Test Conditions ΔR25/R25 (typical) Remarks
Low temperature storage IEC 60068-2-1 Storage at low category temperature. Temperature: -40 oC Time: 1000hours ≤3% No visible damage
Storage in dry heat IEC 60068-2-2 Storage at upper category temperature. Temperature: 100 oC Time: 1000hours ≤3% No visible damage
Storage in damp heat, steady state (Humidity test) IEC 60068-2-3 Temperature: 40oC,
Humidity:90%-95% RH,
Duration:1000 hours
≤3% No visible damage
Rapid temperature cycling IEC 60068-2-14 1. -40C/30 minutes
2. 30C/5minutes
3. 100C/30 minutes
4. 30C/5minutes.
Number of cycles: 5 Cycles
≤3% No visible damage

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