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Siemens Overload Relay: Thermal Protection, 3 Poles, 1NO/1NC, Frame Size S00 - IEC Thermal Overload Relays
SiemensIEC Thermal Overload Relays

Siemens Overload Relay: Thermal Protection, 3 Poles, 1NO/1NC, Frame Size S00

The SIEMENS Overload Relay is an IEC thermal overload relay from the SIRIUS series, designed for frame size S00 contactors. It features integrated bimetallic elements, eliminating the need for separate thermal units…

SKU 3G-OTH-39359

Brand
Siemens
Item
Overload Relay: Thermal Protection, 3 Poles, 1NO/1NC, Frame Size S00
Category
IEC Thermal Overload Relays
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Local availability & support — Singapore

Local office
20 Woodlands Link #09-05, Singapore 738733
Phone
+65 8878 8355
Delivery
Same-day or next-business-day delivery within Singapore for in-stock items; 7–14 days for factory-order parts from Europe.
Payment
Invoicing in SGD. PayNow, bank transfer, and corporate PO accepted.
Ships to
Singapore

Technical Specifications

Siemens
Manufacturer Part Number
3RU21160EB0
Type
1NO/1NC, Frame Size S00, 0.28 A – 0.4 A
Poles
3
Frame Size
S00
Compatible Contactors
Frame Size S00
Auxiliary Contact Form
1NO/1NC
Maximum Voltage Rating
690V AC
Phase Loss Sensitivity
No
Thermal Units Required
None (Relay Includes Integrated Bimetallic Elements)
Terminal Connection Type
Screw Terminals
Compatible Contactor Series
SIRIUS

Technical Documents

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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS Overload Relay is an IEC thermal overload relay from the SIRIUS series, designed for frame size S00 contactors. It features integrated bimetallic elements, eliminating the need for separate thermal units, and provides 1NO/1NC auxiliary contacts with screw terminals. The relay has a maximum voltage rating of 690V AC and is compatible with frame size S00 contactors.

Frequently Asked Questions

What is the SIEMENS 3RU21160EB0 overload relay used for?

The SIEMENS 3RU21160EB0 is an IEC thermal overload relay from the SIRIUS series, used to protect motors from overload and phase-loss conditions. It is designed for frame size S00 contactors and provides 1NO/1NC auxiliary contacts with screw terminals, suitable for industrial motor control applications.

What are the specifications of the SIEMENS 3RU21160EB0 overload relay?

The SIEMENS 3RU21160EB0 is a 3-pole thermal overload relay with a current range of 0.28 A to 0.4 A, frame size S00, and a maximum voltage rating of 690V AC. It includes integrated bimetallic elements, 1NO/1NC auxiliary contacts, and screw terminals. It is compatible with SIRIUS frame size S00 contactors.

Where to buy the SIEMENS 3RU21160EB0 overload relay worldwide?

You can source the SIEMENS 3RU21160EB0 overload relay through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to worldwide destinations. Contact us for availability and lead time; we supply genuine Siemens SIRIUS components for motor protection applications.

How to select the correct SIEMENS overload relay for a motor?

To select the correct SIEMENS overload relay, match the relay's current range to the motor's full-load current. For the 3RU21160EB0, the range is 0.28 A to 0.4 A. Ensure the relay's frame size (S00) matches the contactor frame size. Use screw terminals for wiring and verify the auxiliary contact configuration (1NO/1NC) meets your control circuit needs.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens iec thermal overload relays. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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SIEMENS Overload Relay: Thermal Protection, 3 Poles, 1NO/1NC, Frame Size S00, 0.14 A – 0.2 A (MPN 3RU21160BB0)
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SIEMENS Overload Relay: Thermal Protection, 3 Poles, 1NO/1NC, Frame Size S00, 0.14 A – 0.2 A (MPN 3RU21160BB0)
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SIEMENS Overload Relay: Thermal Protection, 3 Poles, 1NO/1NC, Frame Size S00, 0.55 A – 0.8 A (MPN 3RU21160HB0)
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