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Siemens 3RU2136-4GB0 SIRIUS Thermal Overload Relay - 36-45A

Siemens 3RU2136-4GB0 SIRIUS thermal overload relay.

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ManufacturerSiemens

Part number3RU2136-4GB0

Adjustable Current Range 36-45A

Size S2

Trip Class 10

Mounting Contactor Mounting

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Thermal overload protection Phase failure sensitivity Manual or automatic reset Direct contactor mounting Class 10 tripping Screw terminals for main and auxiliary circuits

Product description

The Siemens 3RU2136-4GB0 is a thermal overload relay designed for reliable motor protection in demanding industrial environments. It features an adjustable current range of 36 to 45 Amps, a Size S2 frame, and meets Class 10 tripping requirements. This model is built for direct mounting onto Siemens Sirius 3RT203 size S2 contactors.

This overload relay is essential for protecting three-phase motors from thermal damage due to overloads, phase asymmetry, and phase failure. Its applications are extensive, covering heavy machinery, industrial automation, and critical infrastructure like pump stations and conveyor systems. The relay offers both manual and automatic reset functionalities for user convenience.

Stanlo Automation, a veteran-owned surplus parts specialist, offers the Siemens 3RU2136-4GB0. We are committed to providing quality industrial automation components at competitive prices, backed by reliable service and fast shipping to keep your operations running.

Technical specifications

Adjustable Current Range	36-45A
Size	S2
Trip Class	10
Mounting	Contactor Mounting
Main Circuit Connection	Screw
Auxiliary Circuit Connection	Screw
Reset	Manual/Automatic
Rated Voltage	690V AC

Common applications

Motor Control

Heavy Machinery

Industrial Automation

Pump Stations

Conveyor Systems

Manufacturing Equipment

Compatible systems

Siemens 3RT203 size S2 contactors

Also known as

Siemens 3RU2136-4GB0 Overload Relay SIRIUS 3RU2136-4GB0 Siemens Motor Protection

Replaces / compatible with

This relay is designed for direct mounting on Siemens 3RT203 size S2 contactors and can serve as a replacement for older 3RU11 series overload relays.

Technical note

Expert tip

This relay features a bi-metal switching mechanism with ambient compensation from -4°F to 140°F (-20°C to 60°C) and provides 1NO+1NC auxiliary contacts for fault signaling.

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Frequently asked questions

What are the key protection features of the Siemens 3RU2136-4GB0 overload relay?

The Siemens 3RU2136-4GB0 overload relay provides thermal overload protection, phase loss sensitivity, and phase unbalance tripping. It is designed to protect motors operating under normal starting conditions with a Class 10 rating.