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Siemens 3RU1146-4JB0 45-63A Class 10 Motor Overload Relay

Siemens 3RU1146-4JB0 Size S3 Motor Overload Relay.

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ManufacturerSiemens

Part number3RU1146-4JB0

Current Range 45-63 A

Size S3

Class 10

Reset Manual/Automatic

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12-month warranty

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CAGE: 9NK75

Motor thermal overload protection Adjustable current settings Class 10 tripping Manual and automatic reset Contactor mounting Screw terminals

Product description

The Siemens 3RU1146-4JB0 is a Size S3 overload relay designed for motor protection, with an adjustable current range of 45-63A and Class 10 tripping characteristics. It features screw terminals for both main and auxiliary circuits and supports manual or automatic reset. This product is phased out, with the SIRIUS 3RU2 series, specifically 3RU2136-4JB0, indicated as its successor.

This overload relay is critical for protecting electric motors from thermal overloads and phase imbalances in industrial settings. It is widely applied in applications such as large motor control, industrial drives, processing equipment, and material handling systems.

Stanlo Automation, a veteran-owned surplus industrial parts distributor, offers the Siemens 3RU1146-4JB0. Sourcing from Stanlo provides access to reliable, often obsolete, components that are essential for maintaining your automation systems, often at a reduced cost.

Technical specifications

Current Range	45-63 A
Size	S3
Class	10
Reset	Manual/Automatic
Main Circuit Terminals	Screw
Auxiliary Circuit Terminals	Screw

Common applications

Industrial drives

Processing equipment

Material handling

Large motor control

Manufacturing automation

Heavy-duty applications

Compatible systems

Designed for direct mounting on Siemens contactors of compatible size (S3)

Also known as

Siemens 3RU1146 SIRIUS overload S3 motor relay 45-63A overload

Replaces / compatible with

This part is a phased-out product. The preferred successor is the Siemens SIRIUS 3RU2136-4JB0.

Technical note

Expert tip

Ensure the ambient temperature compensation is considered when applying this relay in environments deviating from standard conditions.

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Frequently asked questions

What is the replacement part for the Siemens 3RU1146-4JB0 overload relay?

The Siemens 3RU1146-4JB0 is a phased-out overload relay. The recommended successor is the SIRIUS 3RU2136-4JB0 from the newer 3RU2 series, offering equivalent protection for motors within its specified current range.