80DC DC Miniature Circuit Breaker

Unlike AC miniature circuit breakers, DC circuit breakers must interrupt current without natural zero-crossing points, making arc extinguishing performance a critical factor. The PL47S 80DC adopts a dedicated DC arc extinguishing structure to improve fault interruption capability and reduce arc persistence during DC circuit disconnection.

The series provides 1P, 2P, 3P, and 4P configurations with rated DC voltage options up to 1000V and rated current up to 63A. It is compatible with 35mm DIN rail mounting systems and widely applied in photovoltaic combiner boxes, energy storage battery cabinets, communication power systems, and DC distribution panels.

Product Specifications

Features

Dedicated DC Arc Extinguishing Structure

The PL47S 80DC DC Miniature Circuit Breaker is specifically developed for DC circuits where fault interruption is more challenging than AC systems.

Because DC current does not naturally pass through zero points, conventional AC circuit breakers cannot effectively interrupt DC faults. This series uses an optimized arc extinguishing chamber design to increase arc separation distance and improve fault current interruption performance.

It is suitable for DC applications where reliable isolation is required, including photovoltaic strings, battery systems, and DC distribution circuits.

Multiple Pole Configurations for Different DC Voltage Levels

The PL47S 80DC series provides different pole configurations according to system voltage requirements.

The 1P version is suitable for lower-voltage DC branch protection applications.

The 2P version disconnects positive and negative conductors simultaneously, providing enhanced isolation for photovoltaic and energy storage systems.

The 3P and 4P versions are designed for higher voltage DC systems, where multiple poles are connected in series to increase the applicable DC voltage level.

This flexible configuration allows the same product platform to cover different DC power distribution designs.

C Curve Protection for DC Loads

The C curve trip characteristic provides balanced protection for common DC loads.

It allows normal equipment startup current while responding quickly during overload and short circuit conditions.

The circuit breaker is suitable for DC loads including photovoltaic modules, battery storage systems, control power supplies, and communication equipment.

Simultaneous Pole Disconnection

Multi-pole models use a linked operating mechanism to disconnect all poles together when a fault occurs or manual isolation is required.

For photovoltaic and battery applications, simultaneous disconnection of positive and negative conductors helps improve maintenance safety and reduces the risk caused by incomplete circuit isolation.

Compact DIN Rail Installation

The modular housing design supports standard 35mm DIN rail mounting.

The compact structure allows installation inside photovoltaic combiner boxes, energy storage cabinets, and DC distribution panels while simplifying wiring and replacement.

Stable Electrical Performance

The PL47S 80DC DC Miniature Circuit Breaker provides a 6kA short circuit breaking capacity and is manufactured with flame-retardant housing materials designed for long-term operation in electrical cabinets.

Each unit is tested for mechanical operation, electrical performance, and protection characteristics before delivery.

Working Principle

Overload Protection

When the DC circuit current exceeds the rated value for an extended period, the thermal release mechanism responds to the accumulated heat generated by overcurrent.

The circuit breaker disconnects the load circuit to prevent cable overheating and equipment damage.

Short Circuit Protection

During a short circuit fault, the electromagnetic release responds rapidly to the sudden increase in current.

The contacts separate and the DC arc extinguishing system limits arc energy to interrupt the fault current safely.

Applications

Photovoltaic DC Protection

The PL47S 80DC is commonly installed on the DC side of solar photovoltaic systems.

Typical applications include:

PV combiner boxes;

Solar string protection;

Inverter DC input protection.

The dedicated DC breaking structure helps protect photovoltaic circuits against overload and short circuit faults.

Battery Energy Storage Systems

In battery storage applications, DC circuit isolation is essential for maintenance and fault handling.

The PL47S 80DC can be installed in battery cabinets and DC distribution units to provide overcurrent protection and circuit isolation.

Communication and Industrial DC Systems

The product is also suitable for DC power supply systems used in communication equipment, industrial control systems, and other DC electrical installations requiring compact protection devices.

DC MCB Selection Guide

Factory Capability

Zhejiang Pugao Electric Power was established in 2011 and operates a 5,000㎡ manufacturing facility in Yueqing, Zhejiang.

The factory integrates plastic injection molding, metal component processing, assembly, and electrical testing within its own production system.

For PL47S 80DC production, inspection includes mechanical operation testing, overload protection verification, short circuit performance testing, and DC arc interruption evaluation.

With ISO9001 quality management system certification and intellectual property management system certification, PUGAO maintains production traceability from components to finished products.

The factory supports OEM production, customized labeling, export packaging, sample orders, and bulk supply for photovoltaic and energy storage projects.

OEM Customization

PUGAO provides customized DC circuit breaker production services for overseas electrical brands.

Customization options include:

Private brand marking;

Packaging design;

Rated current adjustment;

Pole configuration selection;

Product documentation support.

Why Choose PL47S 80DC

PLANNTER PL47S 80DC DC Miniature Circuit Breaker is designed specifically for modern DC power systems where conventional AC protection devices cannot provide reliable interruption performance.

With dedicated DC arc extinguishing technology, flexible pole configurations, and DIN rail modular installation, the series provides a practical protection solution for photovoltaic, energy storage, and industrial DC applications.