| Rated Zero Power Resistance Value | Measured at base 25 under zero power. | HG-2515 Thermistor Tester | Resistance measurement within allowable deviation: M: 20%; L: 15%; K: 10%; J: 5% |
| B Value (K) | B=[ln(RT1)- ln(RT2)]/(1/T1-1/T2) | HG-2515 Thermistor Tester, Constant Temperature Oil Bath | Conforms to datasheet requirements |
| Dissipation Coefficient () | =P/T | Dissipation Coefficient Tester | See Main Technical Parameters Table |
| Thermal Time Constant () | =C/ | Thermal Time Constant Tester | See Main Technical Parameters Table |
| Residual Resistance | Resistance value when maximum DC current is applied and thermal equilibrium is reached under standard test conditions. | Steady State Current Tester | See Main Technical Parameters Table |
| Maximum Allowable Capacity | Maximum allowable capacitance value of a capacitor connected to a thermistor under load. | Maximum Allowable Capacity Tester | Zero power resistance change rate 25% |
| Maximum Steady State Current | Maximum continuous DC current allowed to be applied to the thermistor at an ambient temperature of 25. | Maximum Steady State Current Tester | Appearance without damage, resistance change rate 25% |
| Solderability | Thermistor leads immersed in 2605 tin liquid for 2 0.5s. | Tin Furnace | Uniform tinning on lead-out end, over 90% immersion area, defects not concentrated in one place. |
| Resistance to Soldering Heat | Thermistor leads immersed in 26010 tin liquid, immersion depth 2.0mm+0/-0.5mm from base plane, with a 1.50.2mm insulating layer, maintained for 50.5s. Recovery time 1 to 2 hours. | Tin Furnace | Zero power resistance change rate 25% |
| Lead Strength | Application of specified load for 10 seconds on one lead; bending another lead 90 degrees, restoring, and reversing 90 degrees, restoring. | HG-2515 Thermistor Tester | Appearance without visible damage, zero power resistance change rate 25% |
| Vibration | Thermistor fixed on a vibration table, frequency 10Hz to 500Hz, amplitude 0.75mm, for 6 hours. | Vibration Table | Appearance without visible damage, clear marking, zero power resistance change rate 25% |
| Shock | Thermistor fixed on a shock table, acceleration 390m/s, 400010 shocks. | Shock Table | Appearance without visible damage, clear marking, zero power resistance change rate 25% |
| Temperature Rapid Change | Cycle: TA (lower category temp) 30min, transition 5min, TB (upper category temp) 30min, room temp 5min. 5 cycles. Recovery > 4 hours. | High-Low Temperature Test Chamber, HG-2515 Thermistor Tester | Appearance without visible mechanical damage, clear marking, zero power resistance change rate 25% |
| Climatic Sequence | Dry Heat (IEC68-2-2 Ba, 16h), Cyclic Damp Heat (IEC68-2-30 Db, 55, 24h/cycle), Cold (-403, 2h), Low Pressure (IEC68-2-13 M, 1h), Alternating Damp Heat (IEC68230 Db, other cycles). Recovery > 1h, measure within 24h. | High-Low Temperature Test Chamber, HG-2515 Thermistor Tester | Appearance without visible mechanical damage, clear marking, zero power resistance change rate 25% |
| Steady State Damp Heat | Placed in 402, 90-95% RH test chamber for 21 days. Recovery > 4 hours, measure zero power resistance. Compare before and after. | Test Chamber / HG-2515 Thermistor Tester | Appearance without visible mechanical damage, clear marking, zero power resistance change rate 25% |
| Upper Category Temperature Endurance | Placed in upper category temperature test chamber for 1000h. Recovery > 4h, measure zero power resistance. | Constant Temperature Test Chamber, HG-2515 Thermistor Tester | Appearance without visible mechanical damage, clear marking, zero power resistance change rate 25% |
