Description

The ABB 1TGB302003R0003 is a high-performance molded case circuit breaker (MCCB) from ABB’s Tmax XT series, engineered for reliable circuit protection in industrial and commercial power distribution systems. This thermal-magnetic breaker integrates advanced arc-quenching technology with robust mechanical design to safeguard electrical circuits against overloads and short circuits. Rated for 250A at 690V AC, the 1TGB302003R0003 features a compact footprint that optimizes panel space while delivering breaking capacities up to 50kA. As part of ABB’s SACE low-voltage portfolio, it supports modular accessories for remote operation and status monitoring. For facility managers and electrical engineers, the ABB 1TGB302003R0003 provides a versatile, IEC 60947-2 compliant solution that balances safety, durability, and installation flexibility across diverse applications.

Engineered for demanding environments, the 1TGB302003R0003 utilizes ABB’s patented double-break contact system to ensure rapid arc extinction and minimize contact erosion. Its adjustable thermal trip settings allow precise coordination with downstream devices, while the magnetic trip element provides instantaneous response to fault currents. The breaker’s current-limiting design reduces let-through energy by up to 70%, protecting sensitive equipment from damage. With IP40 protection when mounted and operating temperatures from -25°C to +70°C, the ABB 1TGB302003R0003 delivers consistent performance in switchboards, control panels, and industrial machinery.

ABB 1TGB302003R0003

Technical Specifications

Main Features and Advantages

Advanced Arc Control:
The ABB 1TGB302003R0003 features a patented double-break contact system that splits arcs into multiple segments, accelerating extinction and reducing contact erosion. This design achieves 50kA breaking capacity at 415V AC – critical for protecting downstream equipment in high-fault scenarios.

Installation Flexibility:
Front/rear cable entry options simplify panel wiring, while the compact width (105mm for 3 poles) saves 30% space versus conventional breakers. The screw-clamp terminals accommodate conductors up to 150mm² without adapters.

Durability and Safety:
Glass-reinforced housing withstands 200N mechanical impact, and silver-alloy contacts resist welding under fault currents. Integrated arc chutes direct plasma away from operators, while the trip-free mechanism ensures contacts remain open during fault conditions.

Maintenance Optimization:
Clear ON/OFF indicators and a mechanical trip flag provide visual status. Test button allows periodic verification without disconnecting loads. Modular accessories (shunt trips, aux contacts) snap on without tools for field upgrades.

Application Field

The ABB 1TGB302003R0003 secures power distribution networks across multiple sectors:

Industrial Manufacturing: Main feeder protection in motor control centers (MCCs), switchgear line protection for CNC machines

Commercial Buildings: Distribution board incomers, generator backup circuits, and HVAC power panels

Infrastructure: Water treatment plant pump controls, tunnel ventilation systems

Renewable Energy: Inverter output protection in solar farms, wind turbine internal power circuits

Marine: Engine room distribution panels with Lloyd’s Register certification

With 690V insulation and 50kA breaking capacity, the 1TGB302003R0003 excels in 480V/600V systems where high fault currents occur. Its wide temperature tolerance suits outdoor kiosks in desert climates and refrigerated warehouses alike.

ABB 1TGB302003R0003

Related Products

ABB 1TGB302002R0003: 200A version for lower-current feeders

ABB 1TGB302004R0003: 320A variant for higher load requirements

ABB S2-AU40: Auxiliary contact block for 1TGB302003R0003 status signaling

ABB S2-SD24: Shunt trip accessory enabling remote opening

ABB S2-UV24: Undervoltage release for automatic disconnection

ABB OT160E3: Fixed mounting kit for panel installation

ABB Tmax XT4N: Next-generation MCCB with electronic trip units

ABB 1SDA072289R1: Time-delay module for coordinated tripping