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

AMWEI Product Code: AMF52-503F3950

Appearance and Dimension


Radial Resin NTC Thermistor Temperature Sensor

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: 50K 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 50K Ohm 3950K Resistance vs. Temperature RT Data

(K Ohm)
(K Ohm)
(K Ohm)
-40C 1675.991 KΩ 20C 61.918 KΩ 80C 6.194 KΩ
-35C 1204.844 KΩ 25C 50.000 KΩ 85C 5.268 KΩ
-30C 881.966 KΩ 30C 40.279 KΩ 90C 4.498 KΩ
-25C 653.643 KΩ 35C 32.635 KΩ 95C 3.855 KΩ
-20C 488.732 KΩ 40C 26.591 KΩ 100C 3.316 KΩ
-15C 367.974 KΩ 45C 21.784 KΩ 105C 2.862 KΩ
-10C 278.775 KΩ 50C 17.941 KΩ 110C 2.479 KΩ
-5C 212.522 KΩ 55C 14.851 KΩ 115C 2.154 KΩ
0C 163.126 KΩ 60C 12.355 KΩ 120C 1.877 KΩ
5C 126.187 KΩ 65C 10.327 KΩ 125C 1.641 KΩ
10C 98.486 KΩ 70C 8.671 KΩ
15C 77.647 KΩ 75C 7.313 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

Other Related AMWEI NTC thermistors Products for Temperature Sensing

Axial Glass NTC thermistor

Axial Glass NTC thermistor Temperature Sensor

Thermistors Temperature Sensor Probe Assemblies

Thermistors Temperature Sensor Probe Assemblies

NTC Thermistor SMD part

NTC Thermistor SMD part for Temperature Sensing Compensation

Content Headline 

Technical Knowledge

Applications Articles

Thermistors Application