Radial Leaded Epoxy Resin Coated NTC Thermistor Temperature Sensor, 20K ohm, Beta B(25/50):3950K, Temperature -40C to +125C.

AMWEI Product Code:  AMF52-203G3950

Appearance and Dimension

Unit:mm

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: 20K 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 20K Ohm 3950K Resistance vs. Temperature RT Data

Temperature
Centigrade
Resistance
(K Ohm)
Temperature
Centigrade
Resistance
(K Ohm)
Temperature
Centigrade
Resistance
(K Ohm)
-40C 621.651 KΩ 20C 24.880 KΩ 80C 2.494KΩ
-35C 448.616 KΩ 25C 20.000 KΩ 85C 2.122 KΩ
-30C 328.368 KΩ 30C 16.159 KΩ 90C 1.811 KΩ
-25C 243.370 KΩ 35C 13.116 KΩ 95C 1.552 KΩ
-20C 182.411 KΩ 40C 10.690 KΩ 100C 1.334 KΩ
-15C 138.132 KΩ 45C 8.745 KΩ 105C 1.150 KΩ
-10C 105.600 KΩ 50C 7.176 KΩ 110C 0.995 KΩ
-5C 81.446 KΩ 55C 5.950 KΩ 115C 0.864 KΩ
0C 63.336 KΩ 60C 4.957 KΩ 120C 0.753 KΩ
5C 49.633 KΩ 65C 4.149 KΩ 125C 0.657 KΩ
10C 39.174 KΩ 70C 3.488 KΩ
15C 31.124 KΩ 75C 2.944 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,
ΔR25/R25≤3%
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,
ΔR25/R25≤3%

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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