Radial Leaded Epoxy Resin Coated NTC Thermistor Temperature Sensor, 30K ohm, Beta B(25/50):3950K, Temperature -40C to +125C.

AMWEI Product Code: AMF52-303G3950

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: 30K ohm+/-2%
  • 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 30K Ohm 3950K Resistance vs. Temperature RT Data

(K Ohm)
(K Ohm)
(K Ohm)
-40C 974.095 KΩ 20C 37.411 KΩ 80C 3.763 KΩ
-35C 700.853 KΩ 25C 30.000 KΩ 85C 3.202 KΩ
-30C 511.063 KΩ 30C 24.193 KΩ 90C 2.734 KΩ
-25C 355.539 KΩ 35C 19.615 KΩ 95C 2.342 KΩ
-20C 281.660 KΩ 40C 15.983 KΩ 100C 2.012 KΩ
-15C 212.479 KΩ 45C 13.087 KΩ 105C 1.733 KΩ
-10C 161.857 KΩ 50C 10.765 KΩ 110C 1.498 KΩ
-5C 124.408 KΩ 55C 8.932 KΩ 115C 1.298 KΩ
0C 96.423 KΩ 60C 7.449 KΩ 120C 1.129 KΩ
5C 75.314 KΩ 65C 6.241 KΩ 125C 0.984 KΩ
10C 59.252 KΩ 70C 5.251 KΩ
15C 46.933 KΩ 75C 4.437 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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