Radial Leaded Epoxy Resin Coated NTC Thermistor  Temperature Sensor, 2750 ohm, Beta B(25/85):3977K, Temperature -40C to +125C.

AMWEI Product Code: AMF52-2750H3977

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: 2750 ohm+/-3%
  • 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 2750 Ohm 3977K Resistance vs. Temperature RT Data

(K Ohm)
(K Ohm)
(K Ohm)
-40C 94.316 KΩ 20C 3.435 KΩ 80C 0.348 KΩ
-35C 67.423 KΩ 25C 2.750 KΩ 85C 0.297 KΩ
-30C 48.961 KΩ 30C 2.208 KΩ 90C 0.254 KΩ
-25C 36.025 KΩ 35C 1.789 KΩ 95C 0.218 KΩ
-20C 26.808 KΩ 40C 1.460 KΩ 100C 0.188 KΩ
-15C 20.149 KΩ 45C 1.200 KΩ 105C 0.162 KΩ
-10C 15.282 KΩ 50C 0.991 KΩ 110C 0.141 KΩ
-5C 11.688 KΩ 55C 0.824 KΩ 115C 0.123 KΩ
0C 9.011 KΩ 60C 0.688 KΩ 120C 0.108 KΩ
5C 7.001 KΩ 65C 0.576 KΩ 125C 0.095 KΩ
10C 5.481 KΩ 70C 0.485 KΩ
15C 4.323 KΩ 75C 0.410 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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