3RV2121-4BA10
circuit breaker frame size S0 for motor protection, Class 10 with overload relay function thermal release 13...20 A short-circuit release 260 A screw terminal standard switching capacity
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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
£64.50
Est. shipping: October 20 2026
View all options and prices (8)
| Condition | Warehouse | Stock | Price | |
|---|---|---|---|---|
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New Sealed
Full 24 months warranty Est. shipping: October 20 2026 |
WM71-3R | Enquire now | £64.50 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: October 20 2026 |
WM85-3R | Enquire now | £68.50 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: October 20 2026 |
WM92-3R | Enquire now | £68.50 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: December 07 2026 |
WM97-3R | Enquire now | £71.50 | Add to Cart |
|
New Sealed
Full 24 months warranty Est. shipping: October 27 2026 |
WM66-3R | Enquire now | £72.00 | Add to Cart |
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New Sealed
Full 24 months warranty Est. shipping: October 20 2026 |
WM94-3R | Enquire now | £73.00 | Add to Cart |
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New Sealed
Full 24 months warranty Est. shipping: October 01 2026 |
WM44-3R | 10+ in stock | - | Get Quote |
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New Sealed
Full 24 months warranty Est. shipping: October 05 2026 |
WM59-3R | Enquire now | - | Get Quote |
Condition: New
Priced on Request
Est. shipping: September 29 2026
View all options and prices (3)
| Condition | Warehouse | Stock | Price | |
|---|---|---|---|---|
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New In Open Original Box
Full 12 months warranty Est. shipping: September 29 2026 |
WM26-3R | Enquire now | - | Get Quote |
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New
Full 12 months warranty Est. shipping: October 01 2026 |
WM44-3R | Low stock | - | Get Quote |
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New
Full 12 months warranty Est. shipping: October 01 2026 |
WM61-3R | Enquire now | - | Get Quote |
Condition: Used
Priced on Request
Est. shipping: October 01 2026
Product Overview:
The 3RV2121-4BA10 is a 20A motor protection circuit breaker designed for use with voltages up to 690V. It features thermal-magnetic protection with overload relay functionality, suitable for motor protection applications. The breaker is mounted on a DIN rail and belongs to size S0, compatible with contactor systems of similar size. It includes screw terminals for secure connections and is part of the SIRIUS series, offering reliable overload and short-circuit protection for electrical motors.
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***
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