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Siemens 3RB1056-1FG0 Overload Relay - 50-200A

Siemens 3RB1056-1FG0 overload relay for motor protection (50-200A, Size S6).

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ManufacturerSiemens

Part number3RB1056-1FG0

Current Range 50-200 A

Class 10

Size S6

Mounting Contactor/Standalone

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Motor protection High current range Size S6 Class 10 tripping Contactor/Standalone mount Rail connect for main power

Product description

The Siemens 3RB1056-1FG0 is a Size S6 thermal overload relay designed for comprehensive motor protection, with an adjustable current range of 50 to 200 A and a Class 10 tripping characteristic. It supports both direct contactor mounting and standalone installation, offering flexibility in system design. The relay features rail connection for the main power circuit and screw terminals for the auxiliary circuit, along with manual-automatic reset.

This high-capacity overload relay is crucial for protecting large industrial motors in demanding applications like heavy machinery, large conveyor systems, and industrial processing plants. Its robust design ensures reliable operation under challenging conditions.

Stanlo Automation, a veteran-owned distributor of surplus industrial automation parts, offers the Siemens 3RB1056-1FG0. We provide access to essential, high-quality surplus components, helping you achieve operational efficiency and cost savings.

Technical specifications

Current Range	50-200 A
Class	10
Size	S6
Mounting	Contactor/Standalone
Main Circuit Terminals	Rail Connect
Aux Circuit Terminals	Screw
Reset	Manual-Automatic
Manufacturer	Siemens

Common applications

Large industrial motors

Heavy machinery

Conveyor systems

Industrial processing

Mining equipment

Marine applications

Compatible systems

Siemens 3RB contactors (Size S6) or standalone mounting

Also known as

Siemens 3RB1056 overload relay Siemens S6 overload relay

Replaces / compatible with

This Size S6 overload relay is designed for compatibility with larger Siemens contactors and can also be used independently. Consult Siemens documentation for specific mating parts and configurations.

Technical note

Expert tip

The rail connection for the main power circuit on the 3RB1056-1FG0 allows for secure and efficient power distribution in high-current applications when mounted on a standard DIN rail or within a control panel.

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Frequently asked questions

Can the Siemens 3RB1056-1FG0 overload relay be used independently of a contactor?

Yes, the Siemens 3RB1056-1FG0 overload relay is designed for both direct contactor mounting and standalone installation. This provides flexibility in how it's integrated into a motor control system, especially for applications where space or specific wiring configurations are needed.