DC MCB (125A)

Function: 125A max DC MCB for overload and short-circuit protection; copper wire wiring only.

Structure: Compact 1P/2P modular type, DIN rail mounted, accessory compatible.

Compliance: Conforms to IEC 60947-2 and UL 1077.

Parameters: 480Vac; 110VDC(1P)/250VDC(2P); 5kA nominal, 20kA max breaking capacity.

Certifications: CE, UR, SAA certified.

Documents: Full catalogs, certificates, 3D drawings and manuals available.

Application: Circuit protection for DC distribution, PV and energy storage systems.

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Product Description
Specification
Product Advantage

Product Description

1. Product Overview

This DC miniature circuit breaker (MCB) is designed for overload and short-circuit protection of DC electrical circuits, with rated current up to 125A. It adopts a modular compact structure, supports 1-pole and 2-pole configurations, and allows flexible assembly of a full range of matching accessories. Terminals are exclusively suitable for copper conductors on both line and load sides.

Specification

2. Compliance Test Standards

• IEC 60947-2

• UL 1077

3. Core Electrical Ratings

3.1 Rated Current

• Rated continuous current (In): Up to 125A

3.2 Rated Operating Voltage

• AC rated voltage (Ue): 480Vac

• DC rated voltage

￮ 1P unit: 110VDC

￮ 2P unit: 250VDC

3.3 Short-Circuit Breaking Capacity

• Standard interrupting rating: 5kA

• Maximum rated breaking capacity: 20kA

3.4 Terminal Requirement

• Copper-only terminals for line side and load side wiring

4. Mechanical & Structural Features

1. Available pole types: 1P, 2P

2. Modular DIN rail mounting design

3. Wide compatibility with a complete series of optional accessories

4. Clear ON/OFF operation indication handle

5. Certifications & Approvals

• CE certification

• UR recognition

• SAA certification

6. Supporting Technical Documents

The following standard technical files are available for reference and engineering application:

1. General Product Catalogue (PDF format)

2. SAA Certification Certificates (separate documents for 1P / 2P variants, PDF)

3. 3D STEP Drawings (1P 80–125A, 2P 80–125A)

4. Operation & Maintenance Manuals

￮ Manual for 1A–63A models (PDF)

￮ Manual for 80A–125A models (PDF)

7. Application Scope

Suitable for supplementary circuit protection of DC power distribution systems, energy storage, photovoltaic, control equipment and low-voltage branch circuits that meet the above voltage and current rating limits.

Product Advantage

1

Excellent Protection: High 20kA breaking capacity for overload and short-circuit protection.
2

Flexible Specification: Optional 1P/2P poles, suitable for AC and DC circuits.
3

Easy Mounting: Compact modular design, standard DIN rail installation.
4

Global Certifications: CE, UR, SAA certified for worldwide use.
5

Good Compatibility: Support various accessories, stable copper terminal connection.
6

Full Technical Documents: Complete drawings, certificates and manuals available.