PROJOY PEBS-175 MCB: Small Size, Big Current, Hardcore Power

Today, industries like new energy, industrial automation, and rail transit are growing fast. In these fields, circuit systems need circuit breakers that are powerful, adaptable, and very safe.

However, small thermal-magnetic circuit breakers are limited by traditional specifications (27mm width, 125A frame rating), making it hard to achieve breakthroughs. This is due to three technical challenges: electrical insulation, temperature rise control, and mechanical strength. In addition, restrictions from industry standards, material performance, and application scenarios also make it difficult to overcome the barriers of DC high voltage and currents above 125A.

PROJOY Electric is proud to introduce the PEBS-H-175 series miniature circuit breaker. It delivers top electrical performance and overcomes the limits of small, high-voltage, high-current breakers. Designed with care, it meets various market needs and ensures safety in every situation.

Strong Electrical Performance ---- The Safety Foundation

Electrical performance is the heart of any circuit breaker. The PROJOY PEBS-H-175 series delivers top performance with precise parameters, offering full protection for circuits and equipment. It meets international standards like IEC/EN 60947-2, GB/T14048.2, and UL489, with three key breakthroughs in voltage withstand, breaking capacity, and frame current.

1) Multiple current options 

Rated currents: 125A, 160A, 175A. With parallel connection: up to 350A (2P) or 525A (3P). Flexible to fit different power loads.

2) Wide voltage range

Supports 1P to 4P. Single-pole voltage: 320V. 4P max voltage: 1200V. Perfect for high-voltage, high-current PV and storage systems, as well as industrial DC equipment.

3) Strong short-circuit protection 

Innovative design and advanced arc‑extinguishing technology. Breaking capacity: over 10kA (ultimate) and 7.5kA (service). Quickly clears fault currents during a short circuit, preventing arcs and equipment damage. Provides all‑round protection for downstream circuits.

4) Precise tripping response

Thermal-magnetic design with B and C curves (B: 4-7In, C: 5-10In). Responds in milliseconds. Stays stable during motor start‑up or battery charging/discharging, but trips fast when overload or short circuit happens. "Stable when needed, trips when necessary."

Works in Many Situations ---- Easy, Efficient, and Low Cost

The PROJOY PEBS-H-175 series is designed for easy installation, simple use, low maintenance, and space saving. It meets real market needs, balancing convenience and cost, while covering many key applications.

1) Small size saves space – 1P: 26.8mm, 3P: 80.4mm, 4P: 107.2mm. Replaces larger breakers, saves space and cost.
2) Easy to install and use – DIN rail mount, low operating force, firm wiring (5N·m torque), low heat and resistance.

Long Life & Full Environment Adaptability ---- Stable and WorryFree

1. Extended service life 

Electrical life >1,000 cycles; mechanical >10,000 cycles – less maintenance. Works well for occasional switching, even under long-term load or no load. Less need for replacement and maintenance.

1. Works in harsh conditions

Works from -30°C to +85°C, humidity <95%, IP67 rated. Stable in wet, hot, or high places. Fits all industries.

Overall, PROJOY PEBS-175 series MCB cuts safety risks and maintenance costs, while delivering safe, efficient operation. It is a reliable partner for electrical safety.