LPJ-30SP LOW PEAK FUSE BUSSMANN

LPJ-30SP LOW PEAK FUSE BUSSMANN – Industrial 30A 600VAC/300VDC Class J Dual-Element Time-Delay Fuse

The LPJ-30SP LOW PEAK FUSE BUSSMANN (Model LPJ-30SP) is an industrial-grade, ultimate-protection dual-element time-delay branch circuit fuse manufactured by Eaton’s Bussmann series. Engineered specifically to deliver overcurrent, short-circuit, and motor-surge protection, this $30\text{-amp}$ , $600\text{ VAC} / 300\text{ VDC}$ Low-Peak™ Class J fuse combines high interrupting ratings with space-saving current limitation across industrial motor drives and power distribution panels.

Featuring dual-element time-delay performance, the LPJ-30SP LOW PEAK FUSE BUSSMANN holds a minimum 10-second time-delay at $500\%$ of its rated current. This allows high motor starting inrush currents, transformer primary surges, and inductive coil transients to pass without nuisance openings. Under short-circuit conditions, its current-limiting capability safely interrupts prospective fault currents up to $300\text{ kA RMS}$ Symmetrical at $600\text{ VAC}$ and $100\text{ kA}$ at $300\text{ VDC}$ . Built in a standard UL Class J ferrule body format ( $13/16'' \times 2-1/4''$ ), this fuse provides a compact footprint for space-constrained electrical enclosures.

Key Features of the LPJ-30SP LOW PEAK FUSE BUSSMANN

Dual-Element Time-Delay Design: Holds a minimum $10\text{-second}$ time-delay at $500\%$ rated load, preventing nuisance tripping caused by heavy motor startup currents and inductive inrushes.
High $300\text{ kA}$ Interrupting Capacity: Rated to safely interrupt short-circuit currents up to $300\text{ kA RMS}$ Symmetrical at $600\text{ VAC}$ ( $100\text{ kA}$ at $300\text{ VDC}$ ), ensuring compliance with NEC® requirements for high fault-current systems.
Compact UL Class J Form Factor: Standardized $13/16\text{ inch} \times 2-1/4\text{ inch}$ ( $20.6 \times 57.2\text{ mm}$ ) ferrule dimensions save significant space compared to standard Class R or Class H fuses.
High-Level Current Limitation: Reduces peak let-through thermal energy ( $I^2t$ ) and magnetic forces during short circuits, protecting downstream breakers, contactors, and switches.
Dual Voltage Operation: Operates continuously up to $600\text{ VAC}$ and $300\text{ VDC}$ , serving AC power systems and DC bus power circuits.
Type 2 “No Damage” Protection: Helps industrial motor starters and controllers achieve Type 2 protection standards under IEC and UL specifications.

Common Applications and Practical Usage

The high breaking capacity, $30\text{A}$ rating, and surge withstand capability of the LPJ-30SP LOW PEAK FUSE BUSSMANN make it a protection component across heavy industrial applications:

Industrial Motor Controllers & VFDs: Protects small-to-medium AC motor branch circuits, soft starters, and variable frequency drive inputs against short circuits and overloads.
Control Transformer Primary Protection: Safeguards primary windings of power distribution transformers while withstanding high magnetizing inrush currents.
Main & Feeder Branch Disconnects: Serves as primary or secondary overcurrent protection in fused safety disconnect switches, panelboards, and motor control centers (MCCs).
Inductive & Resistance Heating Loads: Ideal for process heating equipment, solenoid valves, and commercial HVAC power circuits.

Technical Specifications

The core electrical, physical, and compliance specifications for the LPJ-30SP LOW PEAK FUSE BUSSMANN are detailed below:

Parameter Specification	Technical Details & Operational Values
Component Classification	Class J Dual-Element Time-Delay Current-Limiting Fuse
Primary Target Keyword	LPJ-30SP LOW PEAK FUSE BUSSMANN
Brand / Series	Eaton Bussmann Series / Low-Peak™ LPJ
Catalog Model / Part No.	LPJ-30SP
Amperage Rating	$30\text{ Amps}$ ( $30\text{A}$ )
Voltage Rating	$600\text{ VAC}$ / $300\text{ VDC}$
Interrupt Rating (IR)	$300\text{ kA RMS}$ Symmetrical at $600\text{ VAC}$ / $100\text{ kA}$ at $300\text{ VDC}$
Response Characteristic	Time-Delay (Min. $10\text{ seconds}$ at $500\%$ current)
Fuse Class & Form Factor	UL Class J Ferrule ( $13/16'' \times 2-1/4''$ / $20.6\text{ mm} \times 57.2\text{ mm}$ )
Terminal Connection Type	Ferrule End Caps
Body Material	High-Strength Fiber Tube with Metal Caps
Agency Certifications	UL Listed (Std 248-8, Class J, Guide JDDZ), CSA Certified, CE, RoHS

Operating Guidelines and Usage Tips

SAFETY NOTICE: Always isolate main power supplies and verify circuits are fully de-energized using a calibrated voltage tester prior to inspecting or replacing power fuses.

Holder Compatibility: Install in dedicated UL Class J ferrule fuse blocks or finger-safe modular holders (such as Bussmann CH Series Class J holders).

Motor Protection Sizing: Follow NEC® Article 430 rules for motor branch circuit protection, sizing the fuse at $150\%$ to $175\%$ of full-load amps (FLA) to balance overload protection with inrush tolerance.

To review official Class J fuse standards and low-voltage current-limiting overcurrent protection guidelines, consult the National Electrical Manufacturers Association (NEMA) Directory.

To check regional warehouse inventory availability or request commercial quotes for volume electrical fuses, visit the Control Qatar Contact Page.

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LPJ-30SP LOW PEAK FUSE BUSSMANN