TOMZN 2P 40A DC MCB 1000V Solar DC Circuit Breaker

TOMZN 2P 40A 1000V DC MCB – Reliable Circuit Protection for Solar PV and DC Systems

The TOMZN 2P 40A 1000V DC Miniature Circuit Breaker (MCB) is specifically engineered to protect high-voltage DC circuits, particularly in solar photovoltaic (PV) systems, battery storage setups, and other direct current (DC) applications. Built to handle up to 1000V DC, it safeguards solar strings, combiner boxes, inverter inputs, and energy storage components from overloads and short circuits, ensuring operational safety and equipment longevity.

With a 2-pole (2P) configuration, this breaker offers simultaneous protection and disconnection of both the positive and negative lines, providing complete circuit isolation during faults or maintenance. Its 40A current rating makes it well-suited for medium-load PV strings and DC power lines, offering a perfect balance between capacity and compact design.

The TOMZN DC MCB is equipped with a thermal-magnetic trip mechanism, designed to quickly and accurately interrupt current under fault conditions—whether it’s a slow-building overload or an instantaneous short circuit. Its flame-retardant thermoplastic housing provides added durability and heat resistance, ensuring long-term safety even in harsh solar environments.

Key Features:

• Poles: 2P (Positive and Negative DC lines)

• Rated Current: 40A

• Rated Voltage: 1000V DC

• Breaking Capacity: 6kA

• Trip Mechanism: Thermal-magnetic

• Mounting: Standard 35mm DIN rail

• Housing Material: Flame-retardant thermoplastic (UL94-V0)

• Operating Temperature: -25°C to +70°C

• Compliant Standards: IEC/EN 60947-2

Why Choose TOMZN 2P 40A DC MCB?

TOMZN is trusted globally for quality and affordability in solar and electrical protection devices. The 2P 40A DC MCB combines advanced protection, durable construction, and ease of installation, making it a reliable choice for ensuring the safety and performance of your DC power systems.

Benefits:

• Full Circuit Isolation: Safely disconnects both DC poles simultaneously

• High Voltage Protection: Handles up to 1000V DC

• Fast Trip Response: Minimizes damage during faults

• Durable and Safe: Flame-retardant enclosure built for tough environments

• Easy Installation: Compact DIN rail design for quick and secure mounting

Applications:

• Solar PV arrays and combiner boxes

• DC input protection for inverters

• Battery Energy Storage Systems (BESS)

• Off-grid and hybrid solar setups

• Electric vehicle charging infrastructure (DC side)