Key Selection Information
| Selection Parameter | Confirmed Information |
|---|---|
| Device type | Thermally protected metal-oxide varistor |
| Series | TMOV |
| Disc diameter | 20 mm |
| Maximum continuous AC voltage | 275 V RMS |
| Maximum continuous DC voltage | 350 V |
| Single-pulse energy rating | 190 J |
| Peak surge current | 10 kA single 8/20 µs pulse |
| Thermal protection | Integrated thermal disconnect element |
| Mounting | Radial leaded |
Product Overview
TMOV20RP275E is a 20 mm Littelfuse TMOV thermally protected MOV for AC-line surge suppression. It combines a 275 V RMS continuous-voltage MOV element with an integrated thermal-disconnect structure, giving designers a way to address abnormal MOV overheating in addition to transient overvoltage events.
For the 275 V grade, the datasheet specifies 350 V maximum continuous DC voltage, 190 J single-pulse energy capability and 10 kA peak surge current for a single 8/20 µs pulse. The varistor-voltage window is 387 V to 473 V at 1 mA.
Technical Specifications
| Parameter | Confirmed Information |
|---|---|
| VAC continuous | 275 V RMS |
| VDC continuous | 350 V |
| Energy, 2 ms | 190 J |
| Peak surge current, one pulse | 10,000 A |
| Peak surge current, two pulses | 6,500 A |
| Varistor voltage at 1 mA | 387 V to 473 V |
| Maximum clamping voltage | 710 V at 100 A, 8/20 µs |
| Typical capacitance | 900 pF |
| Disc size | 20 mm |
Protection Design Considerations
The integrated thermal element does not eliminate the need for correct branch protection, spacing and end-equipment safety design. Continuous line voltage, surge environment and available fault current should all be checked against the complete TMOV application requirements.
Manufacturer Resource
Littelfuse TMOV/iTMOV datasheet
Quality & Verification Support
Exact TMOV20RP275E code, radial construction, lead configuration, marking and lot/date information can be reviewed before shipment.
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Request TMOV20RP275E exactly and include quantity, compliance and traceability requirements.
