Eaton Bussmann LPJ-400SPI 400A 600VAC Class J Indicating Fuse
● LT: 8-12w400A Low-Peak Class J dual-element time-delay fuse, indicating, rated 600VAC.
Rated Current400A
Rated Voltage600V AC
Breaking Capacity300kA RMS symmetrical at 600VAC
PackageDrawing dimensions: 7.13 / 5.25 / 3.38 in reference lengths; 2.00 in body diameter; terminal details 0.41 / 0.53 / 1.63 / 1.88 / 0.25 in
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Part NumberLPJ-400SPIBrandEaton BussmannRequested Qty
The Eaton Bussmann Low-Peak LPJ-400SPI is a 400A indicating UL Class J fuse with dual-element, current-limiting and time-delay performance. It provides a minimum 10-second operating time at 500% of rated current and a 300kA RMS symmetrical interrupting rating at 600VAC. The easyID open-fuse indicator requires at least 75VAC, and this indicating version is not DC rated.
Quick answer, specifications & FAQ
Direct answer
Eaton Bussmann Current-Limiting Dual-Element Branch-Circuit Fuse LPJ-400SPI is rated 400A, 600V AC, Time Delay. Breaking capacity 300kA RMS symmetrical at 600VAC, I²t See official current-limitation curves, certifications cULus Listed (JDDZ.E4273) · CSA Certified · CE · RoHS Compliant. Listed applications: Branch Circuit Protection, Industrial Control Protection, Motor protection, Power Distribution Protection. Standards: CSA C22.2 No. 248.8, UL 248-8. 400A Low-Peak Class J dual-element time-delay fuse, indicating, rated 600VAC.
Key specifications
- Part number: LPJ-400SPI
- Brand: Eaton Bussmann
- Rated current: 400A
- Rated voltage: 600V AC
- Breaking capacity: 300kA RMS symmetrical at 600VAC
- Fuse speed: Time Delay
- Dimensions: Drawing dimensions: 7.13 / 5.25 / 3.38 in reference lengths; 2.00 in body diameter; terminal details 0.41 / 0.53 / 1.63 / 1.88 / 0.25 in
- Terminal type: Class J blade terminals
- Certifications: cULus Listed (JDDZ.E4273) · CSA Certified · CE · RoHS Compliant
- Standards: CSA C22.2 No. 248.8, UL 248-8
- Typical lead time: 8-12 weeks
- Fuse indicator: Indicating easyID; minimum indicator voltage 75VAC; indicating version is not DC rated; Response: minimum 10 s at 500% rated current; Carton quantity: 1; Recommended JM fuse blocks: JM60400-1CR, JM60400-2CR, JM60400-3CR. Source: Eaton Technical Data 1007, July 2023.
Frequently asked questions
What are the current and voltage ratings of LPJ-400SPI?
LPJ-400SPI is rated 400A at 600V AC.
What is the breaking capacity of LPJ-400SPI?
LPJ-400SPI has a breaking capacity of 300kA RMS symmetrical at 600VAC. Confirm this covers the available fault current at the installation point.
Which standards and approvals apply to LPJ-400SPI?
LPJ-400SPI is listed under CSA C22.2 No. 248.8, UL 248-8 / cULus Listed (JDDZ.E4273) · CSA Certified · CE · RoHS Compliant.
What is LPJ-400SPI used for?
LPJ-400SPI is listed for Branch Circuit Protection, Industrial Control Protection, Motor protection, Power Distribution Protection applications. Verify suitability for your circuit before ordering.
What are the ordering terms for LPJ-400SPI?
LPJ-400SPI: typical lead time 8-12 weeks. Submit a quote request for a firm quotation.
Data sources
- Part number
- LPJ-400SPI
- Brand
- Eaton Bussmann
- Last updated
- 2026-10-10
- Canonical URL
- https://fusestock.com/products/lpj-400spi-eaton-bussmann/
Technical Specifications
- Part Number
- LPJ-400SPI
- Manufacturer Part Number
- LPJ-400SPI
- Series
- Low-Peak LPJ Class J
- Fuse Type
- Current-Limiting Dual-Element Branch-Circuit Fuse
- Current Rating
- 400A
- Voltage Rating
- 600V AC
- AC / DC
- AC
- Breaking Capacity
- 300kA RMS symmetrical at 600VAC
- I²t
- See official current-limitation curves
- Package / Dimensions
- Drawing dimensions: 7.13 / 5.25 / 3.38 in reference lengths; 2.00 in body diameter; terminal details 0.41 / 0.53 / 1.63 / 1.88 / 0.25 in
- Mounting
- Bolt Mount
- Application
- Branch Circuit Protection · Industrial Control Protection · Motor protection · Power Distribution Protection
- Standard
- CSA C22.2 No. 248.8 · UL 248-8
- Terminal Type
- Class J blade terminals
- Fuse Speed
- Time Delay
- Utilization Class
- Class J
- Approvals
- CE · CSA Approval (Unspecified) · cULus · RoHS
- Certifications
- cULus Listed (JDDZ.E4273) · CSA Certified · CE · RoHS Compliant
- Reference Lead Time
- 8-12 weeks
- Fuse indicator
- Indicating easyID; minimum indicator voltage 75VAC; indicating version is not DC rated; Response: minimum 10 s at 500% rated current; Carton quantity: 1; Recommended JM fuse blocks: JM60400-1CR, JM60400-2CR, JM60400-3CR. Source: Eaton Technical Data 1007, July 2023.
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