| Solder-ability | Uniform tinning on the wetted part, Tinning area 95% | After dipping the lead out end with flux, immerse it in a tin bath at a temperature of 245 5 and a depth of 15mm, with the tin surface 6mm away from the lower end of the NTC body, for 3 0.5 seconds. (Refer to IEC68-2-20 /GB2423.28 Test Ta) |
| Resistance To Soldering Heat | No visible damage, R/RN 20% (R =RN-RN') | Conduct the test according to IEC68-2-20 (GB2423. 28) test Tb. Using the welding groove method, the lead out end is dipped in flux and immersed in a tin groove with a temperature of 260 5 and a depth of 15mm. The tin surface is 6mm away from the lower end of the NTC body and maintained for 10 1 second. After recovering for 4-5 hours under the condition of 25 1 , retest the rated zero power resistance RN '. |
| Strength of lead terminal | No visible damage, R/RN 20% (R =RN-RN') | Conduct the test according to IEC68-2-21 (GB2423. 29) test U. Test Ua: tensile force of 10N for 10 seconds; Test Ub: Bend 90, pull 10N, and continue for 10 seconds; Twist 180, pull 5N, and continue for 10 seconds. After recovering for 4-5 hours under the condition of 25 1 , retest the rated zero power resistance RN '. |
| Temp. Cycling Testing | No visible damage, R/RN 20% (R =RN-RN') | Store for 30 mins each in environment temperature of Ta=-402 and Tb=1502, and cycle 5 times. Each high and low temperature cycle has a transition time of 5minutes in an environment of 251. After conducting temperature cycling tests on the sample, take it out and place it at room temperature (25 1) for 4-5 hours before measuring the zero power resistance RN '. |
| Electrical Cycling Testing | No visible damage, R/RN 20% (R =RN-RN') | Environmental temperature: 25 1 . Cycle count: 1000 times, on/off: 5 s/55 s, test current: 5.0A. After placing the sample at room temperature (25 1 ) for 4-5 hours, measure its zero power resistance RN '. |
| LoadLife (Endurance) Testing | No visible damage, R/RN 20% (R =RN-RN') | Environmental temperature: 25 1 . The sample passes through a maximum working current of 5.0A. After 1000 24 hours, it is taken out and placed at room temperature (25 1 ) for 4-5 hours. The zero power resistance RN 'is measured. |
| Humidity Testing | No visible damage, R/RN 20% (R =RN-RN') | After being placed in an environment with a temperature of 40 2 and a relative humidity of 93 3% for 200 24 hours, take it out and place it at room temperature (25 1 ) for 1-2 hours to measure its zero power resistance RN '. |
| Insulation Withstand voltage | 700VDC, No breakdown or arcing during the test | Take the lead end of the thermistor as one electrode, and wrap the other electrode around the thermistor body with metal foil. Apply a voltage of 700VDC to both electrodes for 60 seconds. |
