Radial Leaded Epoxy Resin Coated NTC Thermistor  Temperature Sensor, 10K ohm, Beta B(25/85):3977K, Temperature -40C to +125C.

AMWEI Product Number: AMF52-103G3977

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+/-2%
  • Beta Value B(25/85): 3977K+/-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 3977K Resistance vs. Temperature RT Data

(K Ohm)
(K Ohm)
(K Ohm)
-40C 308.163 KΩ 20C 12.444 KΩ 80C 1.254 KΩ
-35C 224.106 KΩ 25C 10.000 KΩ 85C 1.070KΩ
-30C 165.777 KΩ 30C 8.127 KΩ 90C 0.918 KΩ
-25C 124.112 KΩ 35C 6.608 KΩ 95C 0.791 KΩ
-20C 93.738 KΩ 40C 5.385 KΩ 100C 0.684 KΩ
-15C 71.284 KΩ 45C 4.405 KΩ 105C 0.593 KΩ
-10C 54.528 KΩ 50C 3.620 KΩ 110C 0.516 KΩ
-5C 41.942 KΩ 55C 2.991 KΩ 115C 0.450 KΩ
0C 32.446 KΩ 60C 2.485 KΩ 120C 0.393 KΩ
5C 25.254 KΩ 65C 2.077 KΩ 125C 0.344 KΩ
10C 19.791 KΩ 70C 1.746 KΩ
15C 15.628 KΩ 75C 1.475 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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