3RU2126-4CB0
Overload relay 17...22 A Thermal For motor protection Size S0, Class 10 Contactor mounting Main circuit: Screw Auxiliary circuit: Screw Manual-Automatic-Reset
Image for illustration purposes only.
If you're unsure whether this part is a perfect match, please contact us.
New Sealed — New and unused, supplied in original manufacturer packaging.
New — New and unused. Original manufacturer packaging may be opened, missing or replaced.
Refurbished — Professionally inspected, tested and restored to full working condition.
Used — Previously used, inspected and tested as fully operational.
Condition: New Sealed
£30.50
Est. shipping: December 07 2026
View all options and prices (10)
| Condition | Warehouse | Stock | Price | |
|---|---|---|---|---|
|
New Sealed
Full 24 months warranty Est. shipping: December 07 2026 |
WM97-3R | Enquire now | £30.50 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: October 20 2026 |
WM92-3R | Enquire now | £33.50 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: October 21 2026 |
WM71-3R | Enquire now | £33.50 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: October 28 2026 |
WM66-3R | Enquire now | £33.50 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: October 20 2026 |
WM94-3R | Enquire now | £35.00 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: October 21 2026 |
WM85-3R | Enquire now | £36.50 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: September 30 2026 |
WM24-3R | Enquire now | - | Get Quote |
|
New Sealed
Full 24 months warranty Est. shipping: September 30 2026 |
WM22-3R | Enquire now | - | Get Quote |
|
New Sealed
Full 24 months warranty Est. shipping: October 09 2026 |
WM62-3R | Enquire now | - | Get Quote |
|
New Sealed
Full 24 months warranty Est. shipping: October 12 2026 |
WM76-3R | Enquire now | - | Get Quote |
Condition: New
£52.50
Est. shipping: October 05 2026
View all options and prices (6)
| Condition | Warehouse | Stock | Price | |
|---|---|---|---|---|
|
New
Full 12 months warranty Est. shipping: October 05 2026 |
WM89-3R | 15+ in stock | £52.50 | Add to Cart |
|
New
Full 12 months warranty Est. shipping: September 29 2026 |
WM83-3R | Enquire now | - | Get Quote |
|
New
Full 12 months warranty Est. shipping: October 02 2026 |
WM44-3R | 20+ in stock | - | Get Quote |
|
New
Full 12 months warranty Est. shipping: October 02 2026 |
WM61-3R | Enquire now | - | Get Quote |
|
New
Full 12 months warranty Est. shipping: October 05 2026 |
WM59-3R | Enquire now | - | Get Quote |
|
New
Full 12 months warranty Est. shipping: October 27 2026 |
WM74-3R | Enquire now | - | Get Quote |
Condition: Used
Priced on Request
Est. shipping: October 02 2026
Product Overview:
The 3RU2126-4CB0 is a thermal overload relay designed for motor protection, suitable for main circuits with a current range of 17 to 22 amperes. It features a size S0 and a trip class of 10, providing reliable overload detection and protection. The relay includes one normally open (NO) and one normally closed (NC) auxiliary contact, and can be mounted on contactors using screw connections. It offers both manual and automatic reset functions, ensuring flexible operation within electrical control systems.
Full 12 months warranty
Siemens is a global leader in industrial automation, digitalisation, and electrification, offering products such as PLCs, drives, industrial robots, and process control systems. Known for innovation and sustainability, Siemens’ technologies enhance efficiency, safety, and performance across industries like manufacturing, energy, and healthcare.
***CJS Automation is NOT an authorised distributor of Siemens***
Other Siemens Parts
Closest part codes available to buy online.
GB 
US 
DE 
DK 
ES 
FI 
FR 
IT 
NL 
NO 
PT 
SE