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Siemens SIRIUS 3RU2 Thermal Overload Relay 1 NO/1 NC 14A 20A F.L.C 20A Contact Rating 7.5 kW 3RU2126-4BB0

Name: Siemens SIRIUS 3RU2 Thermal Overload Relay 1 NO/1 NC 14A 20A F.L.C 20A Contact Rating 7.5 kW 3RU2126-4BB0
Brand: Siemens
SKU: 127499
Price: 78.75 USD
Availability: InStock

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Category Overload Relay Brand Siemens Condition New

Specifications

Country of Origin	Germany
Brand	Siemens
Length	87mm
Model	3RU2126-4BB0
Depth	85mm
IP Rating	IP20
Width	45mm
Mount Type	Direct
Series	SIRIUS 3RU2
Power Rating	7.5kW
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	20A
Number of Auxiliary Contacts	2
Pole and Throw Configuration	3
FLC Motor Rating	14, 20A
Adjustable Current Range	14 → 20 A

Key Features

Protects 3-phase motors against overload conditions effectively.
Configurable with 1 Normally Open and 1 Normally Closed contact.
Features both automatic and manual reset methods for convenience.
Screw terminal type ensures reliable and easy installation.
Compact dimensions of 87mm length, 45mm width, and 85mm depth enhance space efficiency.
Operates reliably from -40°C up to 70°C ambient temperature.
Designed for direct mounting on contactors for streamlined integration.
Complies with IEC 65029, IEC 81346-2, UL, CSA, EAC, IEC 60068-2-27, IEC 61508, CCC, and CE standards.

Product Description

Siemens 3RU2126-4BB0 SIRIUS 3RU2 Thermal Overload Relay is engineered for industrial motor protection, covering flexible current ranges from 14 to 20 amperes with a power rating of 7.5 kW. It integrates 1 Normally Open (NO) and 1 Normally Closed (NC) contact configuration to ensure reliable fault detection and interruption of current to prevent motor damage.

The relay supports both automatic and manual reset methods, allowing adaptability in various operational scenarios. Its screw terminal type ensures secure and straightforward installation, typically mounted directly on compatible contactors to save panel space.

This device is designed to operate effectively within harsh conditions, from temperatures as low as -40°C to highs of 70°C, making it suitable for a broad range of industrial and automation environments. Its IP20 rating provides protection against solid objects larger than 12mm.

With its compact size (87mm length, 45mm width and 85mm depth), the relay is ideal for installations where space optimization is critical. The 20A relay contact current and 690V AC contact voltage rating qualify it for robust motor control applications.

Protects motors from thermal overloads ensuring system safety. Automatic reset simplifies maintenance and reduces downtime. Auxiliary contacts provide functionality extension for control circuits. Mounts directly to contactors, enabling rapid installation.

Certified to multiple international standards ensuring reliability. Fits harsh industrial climates with broad operating temperature range. Compact dimensions facilitate efficient panel layouts. Reliable screw terminals enhance connectivity and durability.

Manufactured in Germany with high quality assurance.

This Siemens thermal Overload Relay is widely applicable in manufacturing, automation, HVAC, and commercial electrical installations demanding motor protection. Its precise design and feature set make it an integral component for safe and efficient electrical systems.

Explore more Siemens industrial electrical protection products on EnvMart for comprehensive solutions tailored to your automation needs.