Radial Leaded Epoxy Resin Coated NTC Thermistor Temperature Sensor, 20K ohm, Beta B(25/50):3950K, Temperature -40C to +125C.
Unit: mm
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.
- 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.
| 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 |
| 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% |
| 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
Content Headline
Appearance & Dimension
NTC 20KΩ B3950 Application
NTC 20KΩ B3950 Electric Data
Resistance vs. Temperature RT Data
NTC 20KΩ B3950 Mechanical Test
NTC 20KΩ B3950 Reliability Data
Technical Knowledge
NTC Thermistor Glossary and Definition
How NTC thermistor beta value is calculated?
NTC Thermistor Manufacturing Process and Quality Control
Applications Articles
NTC thermistor for temperature measurement and control selecting reference information.
Charging Control with AMWEI NTC Thermistor
Reliable limiting of current surges by AMWEI NTC and PTC thermistor
How to Select NTC Thermistor for Inrush Current Limiting?
How to Select Packaged Thermistor Temperature Sensor Probe Assembly ? 6 Steps
