MCB EXS-EN

EXS series modular terminal electrical products are suitable
for systems with a rated voltage of 0.22/0.4kV and a maximum
rated current of up to 125A. This series including a complete
range of miniature circuit breakers, residual current protection
products, isolating switches, supporting accessories, and
various modular devices provides users with comprehensive
protection and control terminal electrical solutions.

Information

Hertzman EXS Series Miniature Circuit Breakers - Technical Manual

Hertzman EXS Series Miniature Circuit Breakers

High-reliability, safety-designed electrical protection solutions for residential, commercial, and industrial applications

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About Us

Hertzman (Hangzhou) Power Technology Co., Ltd. is committed to providing efficient and reliable electrical solutions

About Hertzman

Hertzman (Hangzhou) Power Technology Co., Ltd. is a company specializing in power technology, dedicated to providing efficient and reliable electrical solutions.

The company holds ISO 9001:2000, ISO 14001:2004 and other certifications. Our products include miniature circuit breakers, residual current devices, etc., widely used in power distribution, new energy, and industrial fields.

Certifications & Standards

ISO 9001:2000 Quality Management System Certification
ISO 14001:2004 Environmental Management System Certification
Compliant with IEC60898-1 International Standard
Compliant with GB/T 10963.1 National Standard
Compliant with CCC China Compulsory Certification

Application Fields

Residential Building Electrical Protection
Commercial & Office Premises
Industrial Equipment & Manufacturing
New Energy Power Generation Systems
Electric Vehicle Charging Facilities

Product Overview

The EXS® Series Miniature Circuit Breakers are Hertzman's core products, featuring short-circuit protection, overload protection, and isolation functions

Core Features

High Reliability: Thermal-magnetic release technology ensures rapid response
Safety Design: Flame-retardant housing, shock protection structure
Easy Installation: Modular design, compatible with standard DIN rails (35mm)
Aesthetic & Practical: Clean industrial design matching modern architecture

Technical Features

Rated Current: 6A–125A
Rated Voltage: 230/400V AC
Rated Frequency: 50/60Hz
Ultimate Short-Circuit Breaking Capacity: 6-10kA
Operating Temperature: -20℃ to +60℃

Product Series

EXS-63 Basic Miniature Circuit Breaker
EXSLE-63 Residual Current Circuit Breaker
EXS-125 High-Current Miniature Circuit Breaker
EXSLE-125 High-Current Residual Current Circuit Breaker
EXD Series Isolating Switch

Product Models & Quick Selection

The EXS series includes basic types and residual current protection types, supporting various poles and rated currents

Quick Selection Table

Product Model	Number of Poles	Release Type	Rated Current (A)	Rated Residual Current (mA)
EXS-63	1P, 2P, 2P+N, 3P, 3P+N, 4P	B, C, D	6–63	/
EXSLE-63	1P+N, 2P, 3P, 3P+N, 4P	B, C, D	6–63	30, 50, 75, 100, 300
EXS-125	1P, 2P, 2P+N, 3P, 3P+N, 4P	B, C, D	63–125	/
EXSLE-125	1P+N, 2P, 3P, 3P+N, 4P	B, C, D	63–125	30, 50, 75, 100, 300

Release Characteristic Curves

EXS circuit breakers provide B, C, D three release curves, suitable for different load types:

Curve B

3-5 In

Release current is 3–5 times rated current, suitable for lighting circuits.

Curve C

5-10 In

Release current is 5–10 times, suitable for general resistive and inductive loads.

Curve D

10-20 In

Release current is 10–20 times, suitable for equipment with high inrush currents like motors.

Ordering Examples

Example 1: EXS-63/3P C16 50 units

Example 2: EXSLE-63/2P C16 R30 50 units

Model description: EXS-63/3P C16 means EXS-63 series, 3-pole, C-curve, 16A rated current

Technical Features

High-performance design and reliable protection mechanisms ensure safe operation of electrical systems

Mechanical & Electrical Life

15,000 times

Mechanical Life

The EXS series circuit breakers have high mechanical durability, ensuring long-term reliable operation.

10,000 times

Electrical Life

Installation Features

35mm

DIN Rail Compatible

Standard 35mm DIN rail installation, compatible with existing electrical installation systems.

IP40

Protection Degree (direct installation)

-20℃ ~ +60℃

Operating Temperature Range

Installation Parameters

25mm² / 50mm²

Max. Conductor Cross-Section

6–63A supports 25mm², 63–125A supports 50mm² conductors.

2.5/3.5 N·m

Terminal Torque

6–63A is 2.5 N·m, 63–125A is 3.5 N·m.

Temperature Correction Coefficient

Ambient temperature affects the rated current, correction is required according to the table below:

Rated Current (A)	-20℃	30℃	60℃
6	7.33 A	6.0 A	5.06 A
16	19.55 A	16.0 A	13.47 A
32	39.10 A	32.0 A	26.94 A
63	76.86 A	63.0 A	52.93 A

Electrical Parameters

Electrical performance parameters compliant with international standards, ensuring reliability in various application scenarios

Rated Electrical Parameters

Parameter	EXS-63	EXSLE-63
Rated Operating Voltage	230/400 V AC	230/400 V AC
Rated Frequency	50/60 Hz	50/60 Hz
Ultimate Short-Circuit Breaking Capacity	10 kA	6 kA
Service Short-Circuit Breaking Capacity	6 kA	4.5 kA
Rated Impulse Withstand Voltage	4 kV	4 kV

Protection Features

Overload Protection: Prevents damage to lines and equipment from overload
Short-Circuit Protection: Quickly cuts off short-circuit fault current
Isolation Function: Ensures electrical safety during maintenance
Residual Current Protection (EXSLE models): Prevents electric shock and electrical fires
Compatible with both top and bottom wiring, flexible installation

Installation Dimensions

EXS-63 Series Dimensions

Width: 17.5mm/pole (1P)

Height: 80mm

Depth: 70mm

EXSLE-63 Residual Current Circuit Breaker Dimensions

Width: 35mm (1P+N)

Height: 80mm

Depth: 70mm

Note: 40–63A models have slightly different dimensions

Accessories & Fittings

The EXS series supports various accessories to extend functionality for diverse needs

Accessory Types

OF Auxiliary Contact: Indicates circuit breaker switch status
SD Alarm Contact: Issues signal upon fault release
MX Shunt Release: Remotely triggers circuit breaker trip
MV/MN Over/Undervoltage Protection: Automatic protection during voltage anomalies