DC Miniature Circuit Breaker 12-110V 6A 1-Pole LKB18Z-L-1P by kerwinn

Description

Product Overview

The kerwinn LKB18Z-L-1P is a DC miniature circuit breaker engineered for reliable protection in a wide range of low voltage DC applications. Rated for an input voltage range of 12 to 110 volts DC and a continuous current of 6 amperes, this 1‑pole device combines a compact DIN‑rail mounting form factor with an advanced magnetic arc‑extinguishing system. The breaker features a sturdy polymer housing that resists impact, vibration, and environmental contaminants, making it suitable for both indoor and outdoor installations. Its internal contacts are designed to separate quickly when an over‑current or short‑circuit condition occurs, limiting the arc duration and protecting downstream equipment from damage. The product dimensions of 3.27 x 3.03 x 0.75 inches and a weight of just 3.53 ounces allow for dense packing in power distribution panels, while the clear labeling on the front panel provides instant visual identification of the rated current and pole configuration. The LKB18Z-L-1P complies with international safety standards and has earned a strong reputation among installers for its consistent performance and ease of service.

Usage

This miniature circuit breaker is ideally suited for protecting power distribution facilities in solar photovoltaic systems, battery‑backed energy storage units, electric motorcycles, caravans, and other mobile power solutions. In solar inverters, the LKB18Z-L-1P safeguards the DC bus from overloads caused by fluctuating sunlight intensity, ensuring that the inverter operates within safe limits. For battery packs used in electric vehicles or off‑grid setups, the breaker prevents catastrophic failures by instantly tripping when a short circuit is detected between cells or when an unexpected load draws excessive current. The DIN‑rail design enables quick installation on standard mounting rails found in control cabinets, making it a favorite among electricians who need to assemble modular power distribution boards. Additionally, the breaker can be employed in hobbyist projects such as DIY solar chargers, portable power stations, and robotics, where reliable over‑current protection is essential for both safety and component longevity.

Why Choose Us

Choosing the kerwinn LKB18Z-L-1P means selecting a product that blends high‑quality materials with thoughtful engineering. The breaker’s polymer enclosure is UV‑stabilized, providing resistance to sun exposure and reducing the risk of brittleness over time. Inside, the contacts are made from copper‑tin alloy, offering excellent conductivity and low contact resistance, which translates to reduced heat generation during normal operation. The magnetic arc‑extinguishing mechanism is calibrated to act within milliseconds, minimizing the arc energy and protecting sensitive electronics downstream. Our manufacturing process includes rigorous testing at each production stage, from material inspection to final functional verification, ensuring that every unit meets or exceeds the specified performance criteria. Moreover, kerwinn offers a dedicated technical support team that can assist with installation guidance, troubleshooting, and warranty claims, reinforcing our commitment to customer satisfaction and long‑term reliability.

Key Features

• Rapid magnetic arc‑extinguishing reduces damage during short‑circuit events.
• Compact 1‑pole DIN‑rail design enables space‑saving installations.
• Wide voltage range (12‑110V DC) supports diverse solar and battery applications.
• Durable UV‑resistant housing protects against harsh environmental conditions.
• Responsive after‑sales support and warranty service for peace of mind.

FAQ

What voltage range can the LKB18Z-L-1P handle?

The breaker is rated for a DC input voltage between 12 volts and 110 volts, making it suitable for most low‑voltage solar and battery systems.

Can this breaker be used in a multi‑pole configuration?

The LKB18Z-L-1P is a single‑pole device. For applications requiring multiple poles, you can install several units side‑by‑side on the same DIN rail, each protecting its own circuit.

How does the arc‑extinguishing system work?

When an over‑current condition occurs, a magnetic field generated by the internal coil forces the contacts apart rapidly, quenching the arc within a few milliseconds and limiting the energy released into the circuit.

Is the breaker compatible with standard DIN‑rail panels?

Yes, the LKB18Z-L-1P conforms to the IEC 60715 DIN‑rail standard, allowing it to snap securely into any compatible mounting rail without additional hardware.

What warranty does kerwinn provide?

Kerwinn offers a one‑year limited warranty covering manufacturing defects. Our support team is available to assist with any technical questions or warranty claims throughout the coverage period.