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Siemens Thermal Overload Relay SIRIUS 3RU2, 1 NO/1 NC, 50A F.L.C, 50A Contact Rating 3RU2136-4HB0

Name: Siemens Thermal Overload Relay SIRIUS 3RU2, 1 NO/1 NC, 50A F.L.C, 50A Contact Rating 3RU2136-4HB0
Brand: Siemens
SKU: 263410
Price: 177.56 USD
Availability: InStock

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Category Thermal Overload Relay Brand Siemens Condition New

Specifications

Country of Origin	Germany
Brand	Siemens
Length	55mm
Model	3RU2136-4HB0
Depth	104.2mm
IP Rating	IP20
Width	76.5mm
Mount Type	Direct
Series	SIRIUS 3RU2
Maximum Operating Temperature	70°C
Minimum Operating Temperature	-40°C
Terminal type	Screw
Contact Voltage	690V ac
Reset Method	Automatic & Manual
Normal State Configuration	1 NO/1 NC
Relay Contact Current	50A
Number of Auxiliary Contacts	2
Pole and Throw Configuration	3
FLC Motor Rating	50A
Adjustable Current Range	40 → 50 A

Key Features

Designed for direct mount type applications with screw terminals for secure connections.
Adjustable current range from 40 to 50 amperes for flexible motor protection.
Includes automatic and manual reset methods for operational convenience.
IP20 rated enclosure ensures protection against solid objects in industrial environments.
Wide operating temperature range from -40°C to 70°C for reliable performance.
Complies with multiple international standards including IEC 60947-5-1 and UL approval.
Equipped with a switch position indicator and test function for easy diagnostics.
Suitable for Sirius Size S0 & S00 contactors in electrical and automation systems.

Product Description

Siemens 3RU2136-4HB0 Thermal Overload Relay from the SIRIUS 3RU2 series is engineered for precise current-sensitive motor protection in industrial and automation applications. It features a 1 Normally Open (NO) and 1 Normally Closed (NC) contact configuration with a full load current (F.L.C) rating of 50A and a relay contact current of 50A, making it suitable for protecting motors against overload damage.

This Thermal Overload Relay is designed for direct mounting, equipped with screw terminals for reliable and secure wiring connections. It offers an adjustable current setting range of 40 to 50 amperes, allowing customization for specific motor protection requirements. The relay supports both automatic and manual reset methods, enhancing operational flexibility.

The device has an IP20 protection rating, shielding the internal components from solid objects and ensuring safe functionality under demanding electrical environments. It operates reliably within a temperature range of -40°C to 70°C, suitable for a wide variety of industrial settings.

Conformance to global standards such as IEC 60947-5-1, IEC 61508, UL, CCC, CE, CSA, EAC, and IEC 60529 ensures robust safety and quality performance. Additional features include an integrated switch position indicator and test function for quick status checks and maintenance, a STOP button, and a selector switch for choosing between manual or automatic resets.

This relay is compatible with Sirius Size S0 & S00 contactors and designed for current-sensitive load protection during normal motor starting cycles. The 3RU2 range offers reliable protection with high impulse voltage resistance up to 6 kV and an insulation voltage of 690 V, adaptable for surface or DIN-rail mounting configurations.

Manufactured in Germany, this overload relay meets rigorous quality standards and is ideal for use across electrical automation, industrial manufacturing, HVAC systems, and machinery motor protection.

Designed for secure screw terminal or optional spring-clamp connection versions. Provides reliable operation in various industrial and automation environments. Includes built-in test and indication features for ease of troubleshooting.

Compatible with Sirius Classic contactors size S0 & S00. Suitable for use in electrical control panels and machinery protection circuits. Explore more Siemens automation and control products at EnvMart for trusted quality and performance.