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Siemens 5SY4203-8 Miniature Circuit Breaker - 3A, 2-Pole, Type D

Siemens 5SY4203-8 miniature circuit breaker, 2-pole, 3A, Type D.

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ManufacturerSiemens

Part number5SY4203-8

Poles 2

Current Rating 3A

Tripping Characteristic D

Breaking Capacity 10kA

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Veteran-owned

CAGE: 9NK75

2-pole design Type D tripping curve 10kA short-circuit rating 3A current rating Suitable for high inrush currents

Product description

The Siemens 5SY4203-8 is a 2-pole miniature circuit breaker featuring a Type D tripping characteristic, designed for circuits with high inrush currents. It has a 3A rated current and a 10kA breaking capacity at 400V. The breaker measures 70 mm in width.

This breaker is recommended for applications involving equipment with significant starting currents, such as small motors or transformers, where a Type C breaker might trip unnecessarily. It provides robust protection in demanding industrial environments.

Stanlo Automation, a veteran-owned distributor, offers the Siemens 5SY4203-8 and a wide selection of surplus industrial automation parts. We provide quality components and reliable service to keep your systems operational.

Technical specifications

Poles	2
Current Rating	3A
Tripping Characteristic	D
Breaking Capacity	10kA
Voltage Rating	400V
Width	70mm
Series	5SY4

Common applications

Small Motor Protection

Transformer Circuits

High Inrush Load Protection

Industrial Equipment

Automation Systems

Compatible systems

Siemens 5SY Series accessories

Also known as

Siemens 5SY42038 5SY4 3A Type D breaker Siemens 2-pole Type D MCB

Replaces / compatible with

Compatible with Siemens 5SY series accessories.

Technical note

Expert tip

Utilize the 5SY4203-8 for circuits feeding inductive loads that require a higher instantaneous trip threshold to avoid nuisance tripping during startup.

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Frequently asked questions

What type of equipment benefits from the Siemens 5SY4203-8 Type D breaker?

The Siemens 5SY4203-8 with its Type D characteristic is ideal for protecting circuits that feed devices with substantial starting currents, like small motors or transformers. It offers a tripping range of 10 to 20 times the rated current, preventing nuisance trips.