3 Pole Molded Case Circuit Breaker ARM3-250L - High Breaking Capacity MCCB for Industrial Electrical Protection

The ARM3-250L 3 pole molded case circuit breaker (MCCB) is designed for reliable circuit protection in industrial applications. With a rated current range from 100A to 250A and impressive 50KA breaking capacity at 400V AC, this breaker provides superior protection against overloads and short circuits.

Key Features:

1. High breaking capacity of 50KA at 400V AC (35KA at 690V AC)

2. Thermal magnetic protection mechanism for reliable operation

3. Durable construction with reinforced BMC base and nylon upper cover

4. High silver content (95%) contacts for better conductivity and arc resistance

5. Compact dimensions (107*165*126mm) for space-saving installation

6. Meets IEC60947-2 and GB/T2423.18 standards

Technical Specifications:

- Operating temperature range: -5°C to +40°C

- Maximum installation altitude: 2000m

- Relative humidity: ≤50% at +40°C (up to 90% at 20°C)

- Pollution degree: 3

- Mechanical endurance: 7000 operations

- Electrical endurance: 1000 operations

Material Advantages:

1. Heat shrinkable insulating materials (halogen-free VO flame retardant PA66)

2. High silver content (95%) alloy contacts

3. High carbon steel mechanism with QPQ salt bath treatment

4. Thermosetting insulating materials with excellent arc resistance

5. High sensitivity bimetallic temperature sensors

6. Temperature-resistant spring materials with extended fatigue life

Applications:

The ARM3-250L MCCB is ideal for:

- Industrial power distribution systems

- Commercial building electrical systems

- Machine protection

- Power generation and transmission systems

With its modular accessory design and easy installation features, the ARM3-250L provides a reliable and cost-effective solution for circuit protection needs in demanding environments.