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Siemens 5SY4201-8 Miniature Circuit Breaker - 1A, 2-Pole, Type D

Siemens 5SY4201-8 miniature circuit breaker, 2-pole, 1A, Type D.

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ManufacturerSiemens

Part number5SY4201-8

Poles 2

Current Rating 1A

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 Low 1A current rating Suitable for high inrush currents

Product description

The Siemens 5SY4201-8 is a 2-pole miniature circuit breaker featuring a Type D tripping characteristic for applications with high inrush currents. It has a rated current of 1A and a substantial 10kA breaking capacity at 400V. This breaker measures 70 mm in width.

This breaker is particularly suited for protecting circuits feeding equipment with significant starting currents, such as motors or transformers, where a standard Type C might trip prematurely. Its applications include industrial motor control and power supplies.

Stanlo Automation, a veteran-owned business, supplies the Siemens 5SY4201-8 and a diverse range of surplus industrial automation components. Trust us for reliable parts and excellent service to keep your operations running efficiently.

Technical specifications

Poles	2
Current Rating	1A
Tripping Characteristic	D
Breaking Capacity	10kA
Voltage Rating	400V
Width	70mm
Series	5SY4

Common applications

Motor Protection

Transformer Circuits

High Inrush Load Protection

Industrial Equipment

Power Supplies

Compatible systems

Siemens 5SY Series accessories

Also known as

Siemens 5SY42018 5SY4 1A Type D breaker Siemens 2-pole Type D

Replaces / compatible with

Compatible with Siemens 5SY series accessories.

Technical note

Expert tip

The 5SY4201-8's Type D curve is essential for protecting circuits with inductive loads that have substantial starting currents without nuisance tripping.

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Frequently asked questions

When should I use a Siemens 5SY4201-8 with a Type D characteristic?

The Siemens 5SY4201-8 with its Type D tripping characteristic is recommended for circuits supplying equipment that experiences very high inrush currents upon startup, such as motors or transformers. It trips between 10 to 20 times the rated current.