Product Overview
The NTC Thermistor is a Negative Temperature Coefficient Resistor designed to decrease in resistance as ambient temperature increases. It is manufactured from 2 or 4 types of metal oxides (iron, nickel, cobalt, manganese, copper) that are shaped and sintered at high temperatures. This series features a black coating and inwardly bent leads.
Product Attributes
- Coating Color: Black
- Wrapper Material: Phenolic aldehyde
- Lead Material: Tinned Electron Wire
Technical Specifications
| Item | Specification Request | Test Conditions | Specification Request |
| Resistance Value (251) | 520% | ||
| Max Steady State Current (25) | 2A | ||
| Thermal Time Constant (approx.) | 27S | ||
| Thermal Dissipation Constant (approx.) | 16mW | ||
| Operation Range | -40~+200 | ||
| Approximate resistance value at maximum current | 0.283 | ||
| Max Shock Capacity | 150 uf/240V | ||
| Zero Power Resistance | At 25, when resistance change due to self-heating is negligible compared to total measurement error. | See Electrical Parameters | |
| B Value | Calculated using zero power resistance at 25 and 50. | See Electrical Parameters | |
| Thermal Dissipation Constant | Ratio of power dissipation change to corresponding temperature change at specified temperature. Unit: mw/ | See Electrical Parameters | |
| Thermal Time Constant | Under zero power condition, time required for body temperature to reach 63.2% of the difference between initial and final temperatures. | See Electrical Parameters | |
| Lead Terminal Tensile Strength | 1.0kg load applied to lead terminal for 10 sec. | No visible damage, Resistance change: 20% | |
| Lead Terminal Bend Strength | Fixed body, 0.5kg weight hung on one terminal, bent 90, then reversed and bent 90 in opposite direction. | No visible damage, Resistance change: 20% | |
| Vibration | Frequency: 10~50Hz, Amplitude: 1.55mm, Direction and time: X, Y, Z axes each 2 hours. | No substantial damage | |
| Solderability | Solder bath temperature: 2355, Time: 3S | Covered termination: 98% | |
| Resistance to Soldering Heat | Lead wires dipped in molten solder of 35010 for 3.00.5 seconds up to 4.00.8mm depth. Left at room ambient for 24 hours before measurement. | Resistance change: within 10% | |
| Dry heat (high temperature storage) | 1252 for 1000+48 hours. Left at room ambient for 1 to 2 hours before measurement. | Resistance change: within 10% | |
| Cold (low temperature storage) | -403 for 1000+48 hours. Left at room ambient for 1 to 2 hours before measurement. | Resistance change: within 10% | |
| Humidity test | 402, 95% RH, 1000HR | Resistance change: within 10% | |
| Temperature Cycle test | -40/30 25/5 +125/30 25/5 | Resistance change: within 20% | |
| Operating Temperature | -40~+200 | Allowable temperature range while the thermistor works continuously for long time. | |
| Storage Conditions | -10~40 RH75% |
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