2CDS213103R0321 ABB SH203-D32NA MCB 6 kA 3P+N Type D 32 A

Why Choose the ABB SH203-D32NA Miniature Circuit Breaker?

The ABB SH203-D32NA is a compact and reliable miniature circuit breaker (MCB) designed to provide overload and short-circuit protection for electrical circuits. As part of the established ABB SH200 Compact Home series, it combines thermal overload protection with electromagnetic short-circuit protection for dependable circuit protection in residential, commercial and similar electrical installations.

This current-limiting MCB features a Type D tripping characteristic, making it particularly suitable for circuits supplying equipment with high starting or inrush currents. The SH200 series is designed for straightforward installation on standard DIN rail systems and provides dependable protection in compact electrical distribution assemblies.

With a rated current of 32 A, a 3P+N configuration and a rated short-circuit capacity of 6 kA, the SH203-D32NA provides coordinated protection for three-phase circuits with a neutral conductor. Its four-module format makes it well suited to distribution boards and electrical enclosures requiring compact multi-pole circuit protection.

Key Advantages

• Reliable miniature circuit breaker for overload and short-circuit protection.
• 32 A rated current for electrical distribution circuits.
• 3P+N configuration for three-phase circuits with neutral.
• Type D tripping characteristic suitable for loads with high starting and inrush currents.
• 6 kA short-circuit breaking capacity for dependable fault protection.
• Current-limiting design for enhanced circuit protection.
• Compact four-module construction for standard DIN rail distribution boards.
• Part of ABB's established SH200 circuit protection range.

Key Features

• ABB SH200 Compact Home series.
• 32 A rated current.
• Type D tripping characteristic.
• 3P+N circuit configuration.
• 6 kA rated short-circuit capacity.
• Thermal protection against sustained overload conditions.
• Electromagnetic protection against short-circuit faults.
• Suitable for circuits with higher inrush currents.
• Standard DIN rail mounting.
• Four 17.5 mm modules wide.

Reliable Protection for High-Inrush Electrical Loads

Miniature circuit breakers such as the ABB SH203-D32NA automatically interrupt electrical circuits when excessive current occurs. The thermal tripping mechanism responds to sustained overload conditions, while the electromagnetic mechanism provides rapid protection against potentially damaging short-circuit currents.

The Type D characteristic allows the SH203-D32NA to accommodate higher transient starting currents than Type B or Type C breakers before instantaneous magnetic tripping occurs. This makes it particularly useful for appropriately designed circuits supplying equipment such as motors, transformers and other inductive loads with substantial starting currents.

Typical Applications

• Three-phase circuits with neutral conductors.
• Motor and machinery supply circuits.
• Transformers and inductive electrical loads.
• Equipment with high starting or inrush currents.
• Commercial and building electrical distribution systems.
• Electrical distribution boards and control panels.