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Siemens 3RU2116-1KB1 Thermal Overload Relay - 9-12.5A

Siemens 3RU2116-1KB1 thermal overload relay for motor protection.

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ManufacturerSiemens

Part number3RU2116-1KB1

Current Setting 9.0-12.5 A

Size S00

Class 10

Reset Manual/Automatic

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Thermal overload protection Motor protection Size S00 Class 10 Stand-alone mounting Screw terminals Manual/Automatic reset

Product description

The Siemens 3RU2116-1KB1 is a high-performance thermal overload relay designed for motor protection, featuring a current setting range of 9.0 to 12.5 Amps. This relay is specifically designed for stand-alone installation, offering flexibility in panel design. It conforms to Size S00 dimensions and operates with Class 10 protection, ensuring reliable safeguarding for motors. Both main and auxiliary circuits utilize screw terminals, and the unit supports manual and automatic reset modes.

This overload relay is critical for protecting medium-sized motors in applications such as industrial pumps, large fans, compressors, and machine tools. Its stand-alone capability makes it suitable for applications where direct mounting to a contactor is not feasible or desired.

Stanlo Automation, a veteran-owned surplus distributor, offers the Siemens 3RU2116-1KB1 to meet your industrial needs. We are committed to providing quality surplus parts, ensuring cost-effectiveness and fast delivery to minimize your operational disruptions.

Technical specifications

Current Setting	9.0-12.5 A
Size	S00
Class	10
Reset	Manual/Automatic
Main Circuit Terminals	Screw
Auxiliary Circuit Terminals	Screw
Mounting	Stand-alone Installation

Common applications

Industrial pumps

Large fans

Compressors

Machine tools

Manufacturing equipment

Stand-alone motor protection

Compatible systems

Size S00 applications; requires appropriate mounting hardware for stand-alone installation

Also known as

Siemens 3RU2116-1KB1 SIRIUS 3RU21 Stand-alone Relay Siemens Thermal Overload

Replaces / compatible with

This unit is designed for stand-alone installation and can be used independently of a contactor, though it is part of the broader Siemens SIRIUS 3RU21 family. It may replace older stand-alone thermal overload relays requiring similar current and protection ratings.

Technical note

Expert tip

For stand-alone mounting, ensure the use of appropriate mounting accessories like the 3RU2916-3AC01 support module to maintain proper spacing and ventilation.

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Frequently asked questions

Can the Siemens 3RU2116-1KB1 overload relay be mounted directly to a contactor?

No, the Siemens 3RU2116-1KB1 is specifically designed for stand-alone installation. While it belongs to the SIRIUS 3RU21 series, it does not mount directly onto a contactor and requires its own mounting arrangement or support.