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Siemens 5SX5120-7 1-Pole C-Curve Circuit Breaker

Siemens 5SX5120-7 1-pole C-curve miniature circuit breaker.

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ManufacturerSiemens

Part number5SX5120-7

Poles 1

Curve Type C

DC Voltage Rating 220V DC

DC Current Rating 20A

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1-pole design Type C tripping characteristic 20A rated current High DC breaking capacity Suitable for inductive loads

Product description

The Siemens 5SX5120-7 is a 1-pole miniature circuit breaker from the T55 series, featuring a Type C tripping characteristic. It is rated for 20A at 220V DC with a substantial breaking capacity of 10kA DC. For AC applications, it is rated for 230V AC with a breaking capacity of 4.5kA.

This high-current breaker is designed for robust protection in industrial machinery and power distribution systems. The C-curve ensures it can handle the inrush currents associated with motors and other inductive loads while providing excellent overcurrent protection.

Stanlo Automation, your trusted veteran-owned source for surplus industrial automation parts, offers the Siemens 5SX5120-7. We provide quality components and expert service to meet your specific automation needs.

Technical specifications

Poles	1
Curve Type	C
DC Voltage Rating	220V DC
DC Current Rating	20A
DC Breaking Capacity	10kA
AC Voltage Rating	230V AC
AC Breaking Capacity	4.5kA

Common applications

Motor protection

Industrial machinery

Power distribution panels

High-load circuits

Control systems

Also known as

Siemens 5SX5 breaker T55 circuit breaker Siemens 20A circuit breaker

Replaces / compatible with

This part is a direct replacement for other Siemens 5SX5 series circuit breakers with similar ratings.

Technical note

Expert tip

For motor protection, always ensure the breaker's rated current and tripping characteristic are selected based on the motor's full load current and starting requirements.

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Frequently asked questions

Can the Siemens 5SX5120-7 be used for motor protection?

Yes, the Siemens 5SX5120-7 with its C-curve characteristic is suitable for motor protection, as it can withstand the temporary inrush current when a motor starts.