Radial Leaded Epoxy Resin Coated NTC Thermistor  Temperature Sensor, 2200 ohm, Beta B(25/50):3935K, Temperature -40C to +125C.

AMWEI Product Number: AMF52-222G3935

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: 2200 ohm+/-2%
  • Beta Value B(25/50): 3935K+/-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 2200 Ohm B3935K Resistance vs. Temperature RT Data

(K Ohm)
(K Ohm)
(K Ohm)
-40C 75.452 KΩ 20C 2.748 KΩ 80C 0.279 KΩ
-35C 53.938 KΩ 25C 2.200 KΩ 85C 0.237 KΩ
-30C 39.169 KΩ 30C 1.766 KΩ 90C 0.203 KΩ
-25C 28.820 KΩ 35C 1.431 KΩ 95C 0.174 KΩ
-20C 21.446 KΩ 40C 1.168 KΩ 100C 0.150KΩ
-15C 16.119 KΩ 45C 0.960 KΩ 105C 0.130 KΩ
-10C 12.225 KΩ 50C 0.793 KΩ 110C 0.113 KΩ
-5C 9.351 KΩ 55C 0.659 KΩ 115C 0.098 KΩ
0C 7.209 KΩ 60C 0.550 KΩ 120C 0.086 KΩ
5C 5.601 KΩ 65C 0.461 KΩ 125C 0.076 KΩ
10C 4.385 KΩ 70C 0.388 KΩ
15C 3.458 KΩ 75C 0.328 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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