Bussmann LPJ‑30SP Time Delay Fuse

Bussmann Low-Peak LPJ-30SP – Dual-Element Time-Delay Fuse

Overview:

The Bussmann Low-Peak LPJ-30SP is a dual-element, time-delay fuse from the trusted Bussmann Low-Peak LPJ series. Designed for robust protection in industrial and commercial power systems, this Class J fuse provides reliable current limiting and delayed response to inrush currents — helping prevent nuisance openings during temporary overloads.  

Key Features:

• Amperage: 30 A — ideal for branch circuits, panelboards, motor circuits, and disconnect applications.  

• Voltage Ratings: Up to 600 VAC / 300 VDC.  

• Time-Delay / Dual-Element: Allows momentary overloads without blowing — perfect for circuits with high inrush loads.  

• Current Limiting: Reduces thermal and magnetic stresses on downstream equipment during short-circuit events.  

• High Interrupting Rating: Up to 300 kA RMS symmetrical at AC (600 VAC).  

• Non-Indicating: Standard version without blown-fuse indicator.  

• Construction: Cylindrical melamine body with ferrule terminations — fits standard Class J fuse holders.  

• Dimensions: Approximately 0.81 in × 2.25 in (Dia × Length).  

• Class J Fuse: Premium protection level with excellent current-limiting characteristics.  

Benefits:

✔ Long Time Delay — minimizes unnecessary fuse blowouts due to harmless transient surges.  

✔ Runs Cooler — dual-element design has lower resistance than standard fuses.  

✔ Smooth Coordination — consistent 2:1 ampacity ratios with other Low-Peak fuses for easier selective coordination.  

✔ Protects Sensitive Equipment — current limiting helps shield motors, controllers, and other downstream devices from damaging fault currents.  

Applications:

Perfect for industrial control panels, branch circuit protection, power panelboards, machinery disconnects, and motor starter protection where both overload endurance and high-fault clearing capacity are required.