Bussmann LPS-RK Series Class RK1 Dual-Element Time-Delay Fuse

Bussmann LPS-RK Series Class RK1 Dual-Element Time-Delay Fuse

The Bussmann LPS-RK Series Class RK1 Dual-Element Time-Delay Fuse delivers current-limiting overcurrent protection for motor circuits, transformers, and industrial power distribution systems. This Low-Peak fuse series is available in ratings from 3A to 300A, with a 600VAC/300VDC voltage rating and ferrule end connections for compatibility with standard fuse holders. Class RK1 UL Listed construction combines dual-element time-delay technology with current-limiting performance rated up to 300 kAIC at 600V and 100 kAIC at 300VDC, giving electrical professionals dependable protection across a wide span of circuit sizes.

Key Features

• Amp Rating Range: The LPS-RK series spans 3A through 300A, covering motor, transformer, and distribution circuits of varying sizes within one family.
• Low-Peak Current Limiting: Reduces let-through energy during fault conditions, minimizing damage to downstream equipment and helping limit arc flash energy.
• High Interrupt Rating: Rated 300 kAIC at 600V and 100 kAIC at 300VDC for safe operation under high fault-current conditions.
• Dual-Element Time-Delay Design: Allows temporary, harmless overloads (such as motor inrush) to pass while still responding quickly to short circuits and ground faults.
• Ferrule End Connections: Ferrule-style terminations seat securely in compatible fuse clips and holders for a reliable electrical connection.
• Voltage Rating: 600VAC/300VDC rating supports both AC and DC circuit protection, including battery and DC control system applications.
• Non-Indicating Construction: Standard non-indicating body suited for typical panel and fuse-holder installations.

Certifications & Compliance

• Class RK1 UL Listed
• CE Marked

Technical Specifications

• Voltage Rating: 600 Vac, 300 Vdc
• Product Type: Current-limiting, time delay

Typical Applications

• Motor Starter and Motor Circuit Protection
• Transformer Primary Protection
• Industrial Control Panels and Automation Equipment
• Commercial and Industrial Power Distribution Systems
• Battery Banks and DC Power Distribution
• HVAC Equipment Protection

Why Bussmann?

Bussmann LPS-RK Series fuses combine Class RK1 UL Listed construction with Low-Peak current-limiting and dual-element time-delay design, giving electrical contractors and industrial facilities dependable, code-compliant overcurrent protection. With current-limiting performance rated to 300 kAIC at 600V and 100 kAIC at 300VDC across a 3A-300A range, the LPS-RK series is built for selective coordination and reliable fault clearing in demanding commercial and industrial electrical systems.