A heater element is a resistive component in overload relays that generates heat proportional to current flow to trigger thermal protection.
| Parameter | Typical range | Notes & selection driver |
|---|---|---|
| Response Time | Class 10, 20, 30 | |
| Current Rating | 0.5-630 A | |
| Resistance Range | 0.1-100 Ω | |
| Insulation Resistance | >100 MΩ at 500V DC | |
| Temperature Coefficient | 0.0004 Ω/°C | |
| Max Operating Temperature | 750°C |
Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.
This component is used in the following industrial products
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It generates heat proportional to current flow. Excessive current causes overheating, triggering mechanical tripping of the relay to disconnect power before motor damage occurs.
Yes, they are replaceable components. Must match original specifications for current rating, resistance, and thermal characteristics to maintain protection accuracy.
Common causes include corrosion, mechanical damage, incorrect sizing, prolonged overload conditions, and contamination reducing heat transfer efficiency.
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