Industrial › Semiconductor
Semiconductor Fuses (Fast-Acting)
Ultra-rapid aR (partial-range) and gR (full-range) semiconductor fuses to protect power semiconductors — IGBTs, thyristors and diodes — in drives, inverters, rectifiers and UPS, built to IEC 60269-4.
Category: aR · gRSpeed: Ultra-rapid (low I²t)Standard: IEC 60269-4
Range
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4 of 4 products
| Product | Category | Format | Voltage | Current | Datasheet |
|---|---|---|---|---|---|
| Ultra-Rapid aR (Square-body) TS-UR-SB | aR | Square-body | 690 V AC | 32–1250 A | — |
| Ultra-Rapid aR (Cylindrical) TS-UR-CY | aR | Cylindrical | 690 V AC | 10–100 A | — |
| Full-Range gR (Square-body) TS-GR-SB | gR | Square-body | 690 V AC | 40–700 A | — |
| Ultra-Rapid aR (Flush-end) TS-UR-FE | aR | Flush-end | 1000 V AC | 100–900 A | — |
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Tenso manufactures ultra-rapid semiconductor fuses — aR (partial-range) and gR (full-range) — to protect power semiconductors in drives, inverters, rectifiers and UPS. These devices fail in microseconds, so only a fuse with very low let-through energy (I²t) is fast enough: the fuse’s total I²t must be below the semiconductor’s withstand I²t, or the device isn’t protected. A standard gG fuse is far too slow. Send us the device withstand and operating voltage and we’ll coordinate the right aR / gR fuse. Ratings are indicative; confirm I²t coordination against the datasheet.
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FAQ
Semiconductor Fuses (Fast-Acting) — questions buyers ask
Semiconductor fuse vs standard fuse?
Only an aR / gR semiconductor fuse is fast enough (low enough I²t) to protect IGBTs, thyristors and diodes; a standard gG fuse is far too slow.
What's the difference between aR and gR?
aR is partial-range — it protects against short circuits only and is used with another device for overload. gR is full-range — it covers both overload and short-circuit for the semiconductor.
How do I coordinate the fuse with my device?
The fuse's total let-through energy (I²t) must be below the semiconductor's withstand I²t. Send us the device withstand and we'll coordinate the fuse.