Bussmann
Bussmann LPS-RK-25SPI fuse 25 A 600 V AC 300 V DC Class RK1 indicating time-delay
A 25 A Class RK1 time-delay fuse rated 600 V AC and 300 V DC with a visual indicator and 100 kA DC / 300 kA AC interrupt rating
- 25 A rating protects circuits up to 600 V AC
- Class RK1 design provides 300 kA interrupting capacity at 600 V AC
- Indicating feature shows blown status for faster troubleshooting
- Time-delay characteristic tolerates motor inrush without nuisance opening
- Cylindrical 5 in by 13/16 in body fits HM600 and RM600 rejection blocks
Product identity
The Eaton Bussmann LPS-RK-25SPI is a 25 ampere, 600 volt AC, 300 volt DC Class RK1 cylindrical fuse with an indicating time-delay element. It suits industrial and commercial electrical panels that require high interrupting capacity and visual fault indication.
Installation checks
Verify that the existing fuse block accepts rejection-style Class RK1 fuses and matches the 5 inch length by 13/16 inch diameter body. Confirm the circuit voltage does not exceed 600 volts AC or 300 volts DC and that the available fault current is within the 300 kA AC or 100 kA DC interrupt rating.
System fit
The melamine body and dual-element design fit compatible HM600 or RM600 series fuse blocks, providing both overload and short-circuit protection in a single device. The built-in indicator frees maintenance staff from carrying separate test equipment to locate a blown fuse. It does not serve circuits requiring faster-acting or non-indicating fuse types.
Highlights
- 25 A rating protects circuits up to 600 V AC
- Class RK1 design provides 300 kA interrupting capacity at 600 V AC
- Indicating feature shows blown status for faster troubleshooting
- Time-delay characteristic tolerates motor inrush without nuisance opening
- Cylindrical 5 in by 13/16 in body fits HM600 and RM600 rejection blocks
Specifications
| Brand | BUSSMANN |
|---|
Questions about this item
What comes in the box with the LPS-RK-25SPI fuse and what else is needed?
The package contains the 25 A 600 V AC 300 V DC Class RK1 cylindrical fuse with melamine body and dual-element time-delay construction. A compatible rejection-style fuse block such as the HM600 or RM600 series must be purchased separately for installation.
How do I decide between the LPS-RK-SPI series and the listed equivalents?
The LPS-RK-25SPI is electrically equivalent to Littelfuse LLSRK-ID and Mersen A6D-R series fuses. Choose the LPS-RK-SPI when your specification calls for Bussmann Class RK1 indicating time-delay fuses with 100 kA DC and 300 kA AC interrupt ratings in a 5 in x 13/16 in cylindrical package.
What does the 300 kA interrupt rating mean when the fuse is installed in a 600 V AC circuit?
It means the fuse can safely clear a fault current of up to 300 kA at 600 V AC without rupturing, protecting downstream equipment. The dual-element design provides time-delay for motor-start surges while the indicating feature gives visual confirmation of operation.
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