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Bussmann Eaton KRP-C Series Class L Time-Delay Fuse, 750A-1200A
Model: BUS-KRP-C
Bussmann Eaton KRP-C Series Class L Time-Delay Fuse, 750A-1200AThe Bussmann KRP-C Class L current-limiting time-delay fuse family from Eaton delivers dependable overcurrent protection across an...
Bussmann
Starting at
$1,224.74
Bussmann KRP-C-900SP Eaton Series KRP-C Fuse, Current-limiting, Time-delay, 600 Vac, 300 Vdc, 900A, 300 kAIC at 600 Vac, 100 kA at 300 kAIC Vdc, Class L, Bolted blade end X bolted blade end, 1700, 2.5, Inch, Non Indicating, 4 S at 500%.
- Amp rating: 900 A
- Class: Class L
- Interrupt rating: 300 kAIC at 600 Vac, 100 kA at 300 kAIC Vdc
- Product type: Current-limiting, Time-delay
- Dimensions (L x W x H): 8.63 x 2.53 x 2.53 IN
Genuine Bussmann part number KRP-C-900SP.
Manufacturer Resources
Product Specs
- Department:
- Electrical
- Product Group:
- Circuit Protection
- Product Type:
- Time-Delay Fuse
- Product Subgroup:
- Fuses
Bussmann KRP-C-650SP – Frequently Asked Questions
1) What amp ratings does the Bussmann KRP-C Class L fuse come in?
Four ratings are offered: 650A (KRP-C-650SP), 900A (KRP-C-900SP), 3200A (KRP-C-3200SP) and 4000A (KRP-C-4000SP). The amp rating is the only thing that changes between them, so pick by the switch or bolted-pressure contact rating you are protecting and order the matching SP part number.
2) Will a KRP-C fuse fit my existing Class L fuse holder?
The KRP-C is a Class L fuse with bolted blade ends on both terminals, so it mounts into Class L bolted-blade mountings rather than clips. Class L dimensions are standardized by amp rating, so a KRP-C of a given rating lands in the same bolt pattern as the Class L fuse it replaces. It will not work in a Class J, Class T or Class RK holder, which use different bodies and mountings.
3) Can I use a Bussmann KRP-C on a 480V or 600V service, and does it work on DC?
The KRP-C-900SP is rated 600 Vac and 300 Vdc, so it covers 480Y/277V and 600V AC systems as well as DC circuits up to 300 volts. Never apply it above those voltage ratings.
4) What interrupting rating does the KRP-C give me for a high fault-current service?
The KRP-C-900SP is rated 300 kAIC at 600 Vac and 100 kA on DC. That covers main switchboard and service-entrance locations where available fault current is high, and because the fuse is current-limiting it reduces let-through energy to downstream gear.
5) Is the KRP-C a time-delay fuse, and will it hold motor and transformer inrush?
Yes, it is a time-delay, current-limiting fuse. The 900A version carries 4 seconds minimum at 500 percent of rating, so it rides through the inrush of motor starting and transformer energizing instead of opening on a normal surge, while still clearing a short circuit fast.
6) How much room do I need in the switchboard for a 900A KRP-C?
The KRP-C-900SP body measures 8.63 x 2.53 x 2.53 inches. Larger amp ratings in Class L are physically bigger, so if you are stepping up to the 3200A or 4000A version, verify the compartment and bolt centers before you order.
7) Is the SP suffix on KRP-C-900SP a different fuse from a plain KRP-C-900?
The SP suffix is Bussmann's designation for the current production Class L Low-Peak fuse, and it is how every rating is cataloged here: KRP-C-650SP, KRP-C-900SP, KRP-C-3200SP and KRP-C-4000SP. Order by the full SP part number so you get the genuine Bussmann fuse rather than a look-alike.
8) Does the KRP-C have a blown fuse indicator?
No. The KRP-C-900SP is a non-indicating fuse, so there is no mechanical flag or light to tell you it has opened. Troubleshooting means metering across the fuse or checking continuity with the circuit de-energized.
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Does the Bussmann KRP-C-650SP come with a warranty?
Absolutely. The Bussmann KRP-C-650SP is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
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