Bussmann
Bussmann LPS-RK-40SPI 40A 600VAC Time Delay Class RK1 Fuse
A 40 A, 600 V AC time-delay RK1 fuse with melamine body and visual indication for high-interrupt protection
- Time-delay protection handles motor-start surges without nuisance opening
- 40 A rating matches standard branch-circuit requirements
- 600 V AC / 300 V DC rating covers industrial control panels
- 300 kA interrupting capacity clears severe faults safely
- Visual indicator shows blown status for faster troubleshooting
40 A 600 V AC Class RK1 Fuse
This Bussmann LPS-RK-40SPI fuse provides 40 A overcurrent protection at 600 V AC and 300 V DC in a Class RK1 melamine body. The dual-element, time-delay design tolerates temporary inrush currents without nuisance opening. An indicating feature gives visual confirmation when the element has blown. It fits rejection-style fuse blocks such as the HM600 and RM600 series.
Cylindrical body fits rejection blocks
The cylindrical body measures 5-1/2 in long by 1-1/16 in diameter and slides into compatible rejection-style fuse blocks. Correct orientation and firm seating are essential; a loose fit can cause overheating. Verify the block series matches HM600 or RM600 before installation. No special tools are required beyond standard fuse pullers.
Industrial panels needing high interrupt rating
Suited for control panels, motor circuits and distribution equipment that require a 300 kA AC or 100 kA DC interrupt rating with time-delay coordination. Not intended for low-voltage automotive or electronic assemblies that need fast-acting or semiconductor-rated devices. Buyers who need a different ampere rating or voltage class should select an alternative part.
Highlights
- Time-delay protection handles motor-start surges without nuisance opening
- 40 A rating matches standard branch-circuit requirements
- 600 V AC / 300 V DC rating covers industrial control panels
- 300 kA interrupting capacity clears severe faults safely
- Visual indicator shows blown status for faster troubleshooting
Specifications
| Brand | BUSSMANN |
|---|
Questions about this item
How do I confirm the LPS-RK-40SPI fuse is functioning correctly after installation?
The built-in indicator shows a visible change when the fuse has operated, so you can verify it has not blown by checking that the indicator remains in its normal state.
What comes with the LPS-RK-40SPI fuse and what must be purchased separately?
The fuse itself is supplied individually; a compatible rejection-style fuse block such as the HM600 or RM600 series must be bought separately.
Which LPS-RK-SPI series fuse should I select for a 40 A, 600 V AC circuit?
Choose the LPS-RK-40SPI model, rated 40 A at 600 V AC with a 300 kA interrupting rating, matching the required current and voltage.
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