Description
The Eaton Bussmann LPJ-30SPI (Series: LPJ-SPI) is a 30 A Low-Peak™ Class J time-delay, dual-element current-limiting fuse engineered for critical electrical power distribution and industrial motor protection. Featuring an indicating cartridge design, this fuse provides advanced visual blown-fuse status and an exceptional interrupting rating of 300 kAIC at 600 VAC and 100 kAIC at 300 VDC.
Engineered with dual-element construction and a response time of 10 seconds at 500% overload, the LPJ-30SPI safely absorbs high motor-starting inrush currents without nuisance tripping while providing rapid current limitation under severe short-circuit faults. Built with a durable melamine body and standard ferrule terminals, it ensures compact, high-performance protection for industrial panels, switchgear, and feeder circuits.
Key Features
- Visual Blown-Fuse Indication: Built-in indicator provides immediate visual identification of an open fuse to reduce troubleshooting and downtime.
- Low-Peak™ Class J Performance: Delivers superior current limitation under fault conditions to minimize peak let-through energy.
- Time-Delay Dual-Element Construction: Safely withstands heavy motor starting and transformer inrush currents while protecting against sustained overloads.
- High Interrupting Ratings: Rated for 300 kAIC at 600 VAC and 100 kAIC at 300 VDC for severe short-circuit protection.
- Durable Melamine Body: Rugged cartridge construction designed to withstand demanding industrial operating environments.
Specifications
| Technical Specification | Detail |
|---|---|
| Brand / Manufacturer | Eaton Bussmann Series (LPJ-SPI Line) |
| Catalog / Series Number | LPJ-30SPI |
| Amperage Rating | 30 A |
| Voltage Rating | 600 VAC / 300 VDC |
| Fuse Class | Class J |
| Interrupting Rating | 300 kAIC at 600 VAC / 100 kAIC at 300 VDC |
| Response Time | 10 seconds at 500% overload |
| Element Construction | Dual-Element, Time-Delay |
| Fuse Indicator | Indicating (Visual Blown-Fuse Indication) |
| Terminal Connection | Ferrule Terminal (Holder Mount) |
| Body Material | Melamine Cartridge Body |
| Body Dimensions | 0.81 in Diameter x 2.25 in Length |
| Primary Applications | Industrial motor branch circuits, power panelboards, switchgear, mains, and feeders |






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