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Siemens 3RU1146-4JB1 Overload Relay (45-63A) - Motor Protection

Siemens 3RU1146-4JB1 Overload Relay for motor protection (45-63A).

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ManufacturerSiemens

Part number3RU1146-4JB1

Current Range 45-63 A

Size S3

Trip Class Class 10

Reset Manual/Automatic

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Motor Overload Protection Adjustable Current Setting Class 10 Tripping Manual/Automatic Reset Stand-alone Installation SIRIUS 3RU Series

Product description

The Siemens 3RU1146-4JB1 is a thermal overload relay designed for motor protection. It covers a current range of 45-63 A and is rated for Class 10 tripping characteristic. This relay is designed for stand-alone installation and features screw terminals for both the main and auxiliary circuits. It supports manual and automatic reset functions.

This overload relay is crucial for protecting electric motors from damage due to overloads or phase failures in industrial applications, such as pumps, fans, compressors, and conveyor systems.

Please note that the 3RU1146-4JB1 is a phased-out product. Its successor is the SIRIUS 3RU2 series, with the preferred successor type being 3RU2136-4JB1. Stanlo Automation, your veteran-owned source for surplus automation parts, can help you find suitable alternatives or stock existing parts like this one.

Technical specifications

Current Range	45-63 A
Size	S3
Trip Class	Class 10
Reset	Manual/Automatic
Installation	Stand-alone
Main Circuit Terminals	Screw
Auxiliary Circuit Terminals	Screw
Status	Phased-out

Common applications

Motor Control Centers

Pump Control

Fan Control

Compressor Control

Conveyor Systems

Industrial Machinery

Compatible systems

Siemens 3RT Contactors (with adapter) SIRIUS Motor Control System Components

Also known as

Siemens SIRIUS Overload Relay 3RU1146-4JB1 Motor Protection Relay Siemens S3 Overload

Replaces / compatible with

This is a phased-out product. The preferred successor is the Siemens SIRIUS 3RU2136-4JB1, offering similar functionality with updated technology.

Technical note

Expert tip

While this product is phased out, ensure that any replacement or existing unit is properly sized for the motor's full load current and starting characteristics to prevent nuisance tripping or inadequate protection.

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Frequently asked questions

What is the successor to the Siemens 3RU1146-4JB1 overload relay?

The Siemens 3RU1146-4JB1 is a phased-out product. Its preferred successor is the SIRIUS 3RU2136-4JB1, which offers updated features and compatibility within the SIRIUS motor control system.