CDB6i-125 Moulded Case Circuit Breaker

CDB6i-125 Moulded Case Circuit Breaker

The CDB6i-125 series moulded case circuit breaker is a high-performance protection device designed for low-voltage AC distribution systems. It is widely used in industrial equipment, building power distribution, and electrical control systems.

The circuit breaker integrates overload protection, short circuit protection, control, and isolation functions, effectively protecting electrical circuits and equipment from damage caused by overload currents and short circuit faults.

The CDB6i-125 series supports rated current options of 63A, 80A, 100A, and 125A, with pole configurations including 1P, 2P, 3P, and 4P. The rated operating voltage supports 230/240VAC for single-pole applications and 400/415VAC for multi-pole applications.

The product adopts thermal-magnetic tripping technology and supports C and D tripping curves:

• C curve is suitable for standard loads and distribution circuit protection.
• D curve is suitable for motors and equipment with high starting currents.

With a modular design, the circuit breaker can be easily installed on standard 35mm DIN rails. It features U-type terminals with a maximum cable capacity of 50mm² and supports various accessories, including OF auxiliary contacts, SD alarm contacts, MX+OF shunt release, overvoltage release, and undervoltage release.

The CDB6i-125 series is widely applied in industrial control cabinets, mechanical equipment, low-voltage distribution systems, building electrical systems, and OEM complete equipment.

Product Features

• Provides overload protection, short circuit protection, control, and isolation functions
• Supports high current applications from 63A to 125A
• Available in 1P, 2P, 3P, and 4P configurations
• Supports C and D tripping curves
• Breaking capacity up to 10kA
• Modular structure with standard DIN rail mounting
• Supports multiple electrical accessories
• Suitable for industrial and low-voltage distribution applications

Applications

• Industrial power distribution systems
• Automation equipment
• Electrical control cabinets
• Building low-voltage distribution systems
• OEM complete equipment

Technical Parameters

Parameter	Value	Unit
Product Series	CDB6i-125	-
Product Type	Moulded Case Circuit Breaker	-
Rated Current In	63, 80, 100, 125	A
Number of Poles	1P, 2P, 3P, 4P	-
Rated Operating Voltage Ue	1P: 230/240 AC; 2P, 3P, 3P+N, 4P: 400/415 AC	V
Rated Insulation Voltage Ui	500	V
Rated Short-Circuit Capacity Icn	10	kA
Rated Impulse Withstand Voltage Uimp	4	kV
Dielectric Test Voltage	2kV (50Hz, 1 minute)	-
Utilization Category	A	-
Isolation Function	Available	-
Pollution Degree	2	-
Tripping Type	Thermal Magnetic Release	-
Tripping Curve	C Curve, D Curve	-
Product Standard	IEC/EN 60947-2, GB/T 14048.2	-
Certifications	CCC, CE, CB, SEMKO	-

Tripping Characteristics

Type	Characteristic
C Curve	Suitable for standard loads and distribution circuits, instantaneous tripping range 5~10In
D Curve	Suitable for motors and high inrush current loads, instantaneous tripping range 10~14In

Mechanical Characteristics

Parameter	Value	Unit
Handle Color	Red	-
Contact Position Indicator	Red indicator showing ON/OFF status	-
Mechanical Endurance	20000	Operations
Electrical Endurance	6000 (In≤100A); 4000 (In>100A)	Operations
Protection Degree	IP40 inside distribution box; IP20 direct installation	-
Mechanical Shock Resistance	30g, 3 impacts, duration 11ms	-
Vibration Resistance	IEC/EN 60068-2-6	-
Damp Heat Resistance	Category 2, 28-day cycle	-
Reference Ambient Temperature	30	°C
Operating Temperature	-35~70	°C
Storage Temperature	-40~85	°C

Installation Characteristics

Parameter	Value	Unit
Terminal Type	U-type terminal	-
Maximum Cable Capacity	50	mm²
Maximum Tightening Torque	3.5	N·m
Installation Method	Standard 35mm DIN rail mounting	-
Wiring Direction	Top in, bottom out	-
Recommended Tool	Phillips screwdriver or flat screwdriver	-

Compatible Accessories

Accessory	Function
OF	Auxiliary Contact
SD	Alarm Contact
MX+OF	Shunt Release + Auxiliary Contact
Overvoltage Release	Overvoltage Protection
Undervoltage Release	Undervoltage Protection