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Siemens 3RU2136-4FB0 SIRIUS Thermal Overload Relay - 28-40A

Siemens 3RU2136-4FB0 SIRIUS thermal overload relay.

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ManufacturerSiemens

Part number3RU2136-4FB0

Adjustable Current Range 28-40A

Size S2

Trip Class 10

Mounting Contactor Mounting

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

Product description

The Siemens 3RU2136-4FB0 is a thermal overload relay designed for robust motor protection applications. It features an adjustable current range of 28 to 40 Amps, a Size S2 frame, and adheres to Class 10 tripping standards. This relay is engineered for direct mounting onto Siemens Sirius 3RT203 size S2 contactors.

This overload relay provides essential protection for three-phase motors against damage from overloads, phase unbalance, and phase failure. Its applications are widespread across industries such as manufacturing, food processing, and water treatment, where dependable motor operation is critical. The unit offers both manual and automatic reset functions for operational convenience.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 3RU2136-4FB0. We are dedicated to providing quality industrial automation components and excellent customer service, ensuring you receive reliable parts for your MRO needs.

Technical specifications

Adjustable Current Range	28-40A
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

Industrial Machinery

Manufacturing Equipment

Food Processing

Water Treatment

Automation Systems

Compatible systems

Siemens 3RT203 size S2 contactors

Also known as

Siemens 3RU2136-4FB0 Overload Relay SIRIUS 3RU2136-4FB0 Siemens Motor Protection

Replaces / compatible with

Compatible with Siemens 3RT203 size S2 contactors, this relay can replace older Siemens 3RU11 series overload relays with similar current ratings.

Technical note

Expert tip

This relay features a bi-metal switching mechanism and is ambient compensated within a range of -4°F to 140°F (-20°C to 60°C), ensuring reliable operation across varying temperatures.

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Frequently asked questions

What is the trip class and size of the Siemens 3RU2136-4FB0 overload relay?

The Siemens 3RU2136-4FB0 overload relay is a Class 10 tripping device and is designed in Size S2 frame. This ensures it meets specific protection standards for motor starting characteristics.