Siemens Overload Relay: Thermal Protection, 3 Poles, 1NO/1NC, Frame Size S0
The SIEMENS Overload Relay is an IEC thermal overload relay with integrated bimetallic elements, designed for frame size S0 and compatible with SIRIUS contactors. It features a 1NO/1NC auxiliary contact form, screw…
SKU 3G-OTH-39802
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
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Product Description
The SIEMENS Overload Relay is an IEC thermal overload relay with integrated bimetallic elements, designed for frame size S0 and compatible with SIRIUS contactors. It features a 1NO/1NC auxiliary contact form, screw terminals, and a maximum voltage rating of 690V AC, with no phase loss sensitivity. This 3-pole relay covers a current range of 5.5 A to 8 A (MPN 3RU21261HB0).
Frequently Asked Questions
What is the SIEMENS 3RU21261HB0 overload relay used for?
The SIEMENS 3RU21261HB0 is an IEC thermal overload relay used to protect motors from overcurrent and phase imbalance. It integrates bimetallic elements for thermal protection and is designed for frame size S0, compatible with SIRIUS contactors. Typical applications include industrial motor control panels, conveyors, pumps, and compressors.
What are the specifications of the SIEMENS 3RU21261HB0 overload relay?
The SIEMENS 3RU21261HB0 is a 3-pole thermal overload relay with a current range of 5.5 A to 8 A. It features 1NO/1NC auxiliary contacts, screw terminals, a maximum voltage rating of 690V AC, and no phase loss sensitivity. It includes integrated bimetallic elements and is compatible with SIRIUS contactors in frame size S0.
Where to buy the SIEMENS 3RU21261HB0 overload relay worldwide?
You can source the SIEMENS 3RU21261HB0 overload relay worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we supply genuine Siemens components for industrial 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 3RU21261HB0, the range is 5.5 A to 8 A. Ensure the frame size (S0) matches your contactor series (SIRIUS). Use screw terminals for wiring. Always consult the motor nameplate and Siemens documentation for proper coordination.
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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.
