Circuit Breakers

Part Number	Description / PDF	Quantity
1C05UM Altech Corporation	1C05UM 0.5A CIRCUIT BREAKER C CH	39
GFL2B100102 Altech Corporation	MCCB+EGFP 10A240V AC 10MA B TRIP	618
1CU6L Altech Corporation	CIR BRKR THRM-MAG 6A LEVER	12
1DU6L Altech Corporation	CIR BRKR THRM-MAG 6A LEVER	15168
1C20UL Altech Corporation	CIR BRKR THRM-MAG 20A LEVER	61
09124601 Altech Corporation	RP2203 25A 30MA 2P EARTH LEAKAGE	67
2D5UM Altech Corporation	CIR BRKR THRM-MAG 5A LEVER	3
1CU20L Altech Corporation	CIR BRKR THRM-MAG 20A LEVER	81108
2BU15R Altech Corporation	CIR BRKR THRM-MAG 15A LEVER	106264
3C25UL Altech Corporation	CIR BRKR THRM-MAG 25A LEVER	26
2G6UM Altech Corporation	CIR BRKR THRM-MAG 6A LEVER	1560
3D25UL Altech Corporation	CIR BRKR THRM-MAG 25A LEVER	13
3DU10L Altech Corporation	CIR BRKR THRM-MAG 10A LEVER	752
1C20UM Altech Corporation	CIR BRKR THRM-MAG 20A LEVER	0
1D6UL Altech Corporation	CIR BRKR THRM-MAG 6A LEVER	24
1CU3R Altech Corporation	CIR BRKR THRM-MAG 3A LEVER	3
GFL2B250102 Altech Corporation	MCCB+EGFP 25A240V AC 10MA B TRIP	6
1G10UM Altech Corporation	1G10UM 10A CIRCUIT BREAKER G CHA	12
1C6UL Altech Corporation	CIR BRKR THRM-MAG 6A LEVER	3184
MS10 Altech Corporation	MS10 MANUAL MOTOR CONTROLLER 63-	2

Circuit Breakers

1. Overview

Circuit breakers are automatic electrical switches designed to protect circuits from damage caused by overloads or short circuits. Unlike fuses, they can be reset after tripping. Modern circuit breakers ensure electrical safety, prevent equipment damage, and maintain system reliability in residential, commercial, and industrial applications.

2. Main Types and Functional Classification

Type	Function Features	Application Examples
MCB (Miniature Circuit Breaker)	Thermal-magnetic protection, <100A rating	Residential wiring, lighting circuits
MCCB (Molded Case Circuit Breaker)	Adjustable trip settings, 10-2500A rating	Industrial machinery, HVAC systems
ACB (Air Circuit Breaker)	High fault current interruption, 400-6300A rating	Power distribution in data centers
RCCB (Residual Current Circuit Breaker)	Earth leakage protection (5-500mA sensitivity)	Outdoor outlets, swimming pool equipment
RCBO (Residual Current Breaker with Overcurrent)	Combines overload, short-circuit, and leakage protection	Hospital equipment, construction sites

3. Structure and Components

Typical components include: - Enclosure: Flame-retardant insulating material housing - Contacts: Silver alloy for high conductivity - Trip Mechanism: Bimetallic strip (thermal) and electromagnetic coil (magnetic) - Arc Extinguisher: Multi-plate chamber for arc suppression - Operating Lever: Manual ON/OFF control with position indicators

4. Key Technical Parameters

Parameter	Description	Importance
Rated Current (In)	Maximum continuous current without tripping	Determines load capacity
Rated Voltage (Un)	Maximum operating voltage	Ensures insulation safety
Breaking Capacity (Icu)	Maximum fault current interrupting capability	Prevents catastrophic failure
Tripping Characteristics	Time-current curve (B/C/D types)	Matches load requirements
Pole Number	1P to 4P configurations	Determines phase protection

5. Application Fields

Power distribution: Residential panels, commercial switchboards
Industrial equipment: Motors, transformers, CNC machines
Renewable energy: Solar inverters, wind turbine systems
Transportation: EV charging stations, rail traction systems

6. Leading Manufacturers and Products

Manufacturer	Representative Product	Key Features
Schneider Electric	Acti 9 series	Modular design, 0.5-125A range
Siemens	5SJ series	High short-circuit withstand, DIN rail mount
ABB	Emax series	Smart connectivity, up to 6300A
General Electric	THQL series	UL-certified, industrial motor protection

7. Selection Guidelines

Key considerations: - Match rated current to load requirements (125% safety margin) - Select tripping curve (Type B for resistive loads, C for motors) - Verify breaking capacity against system fault levels - Consider environmental factors (temperature, altitude) - Ensure compliance with standards (IEC 60898, UL 489) - Example: For a 20kW motor (400V), select MCCB with 63A rating, Type C curve, 50kA breaking capacity

8. Industry Trends

Emerging trends include: - Smart grid integration with IoT-enabled monitoring - Compact designs for space-constrained applications - Eco-friendly materials with halogen-free construction - Integration with renewable energy systems - Predictive maintenance via AI-powered diagnostics - Increased adoption of DC circuit breakers for EV infrastructure