Littelfuse KLK Series Current-Limiting Fast-Acting Midget Fuse, 600V/500VDC

Littelfuse KLK Series Current-Limiting Fast-Acting Midget Fuse, 600V/500VDC

The Littelfuse KLK Series is a line of Midget/5AG fast-acting, current-limiting fuses dual-rated at 600VAC and 500VDC, available in ampere ratings from 0.5A to 10A (0.5A, 3A, 4A, 5A, 8A, 9A, and 10A) to match a wide range of control-circuit loads. Engineered for circuits that do not present high inrush currents, the KLK Series delivers a high interrupting capacity of 100,000A@600VDC, giving these current-limiting fuses the ruggedness to protect sensitive control, lighting, and electronic circuits. Littelfuse designed the KLK Series for use in control circuits, street lighting, H.I.D. lighting, computers, and similar applications where reliable, fast-acting overcurrent protection is required. Manufacturer documentation for the KLK Series includes UL recognition data, multiple ICP interruption test reports, and a CE compliance record, supporting specification in professional and industrial electrical work.

Key Features

• Ampere Rating Range: Available in 0.5A, 3A, 4A, 5A, 8A, 9A, and 10A ratings for control circuits, street lighting, H.I.D. lighting, computers, and other applications without high inrush currents.
• Fast-Acting Opening: Fast-Acting (F) opening characteristic delivers a quick response for effective current-limiting protection.
• Voltage Rating: Dual-rated at 600VAC and 500VDC for broad application compatibility across AC and DC control circuits.
• Interrupting Rating: 100,000A@600VDC high-interrupting capacity, current-limiting type fuse construction for demanding fault conditions.
• Package Size: Compact Midget/5AG fuse form factor for space-constrained fuse holders and blocks.
• Application-Specific Design: Especially suited for control circuits, street lighting, H.I.D. lighting, computers, and similar low-inrush applications where standard fuses may not offer optimal protection.
• Current-Limiting Construction: Fast-acting, high-interrupting capacity, current-limiting design helps reduce let-through energy during fault conditions.

Certifications & Compliance

• UL Recognized (File E10480) per manufacturer documentation
• CE compliance documentation available for the KLK Series
• Verified via multiple manufacturer ICP interruption test reports

Technical Specifications

• Series: KLK

Typical Applications

• Control Circuits
• Street Lighting Systems
• H.I.D. Lighting Circuits
• Computer and Electronic Equipment Protection
• Commercial and Industrial Electrical Panels
• Low-Inrush Load Overcurrent Protection

Why Littelfuse?

Littelfuse backs the KLK Series with fast-acting, current-limiting fuse construction rated for a 100,000A@600VDC interrupting capacity, giving specifiers a compact Midget/5AG fuse family spanning 0.5A to 10A for demanding low-inrush circuits such as control panels, street lighting, and H.I.D. lighting systems. Supporting UL recognition and CE compliance documentation, along with independently referenced ICP interruption test reports, reinforces code-compliant, reliable performance for professional electrical installations that depend on precise, fast-acting overcurrent protection.