Siemens 3RV2021-1KA10 SIRIUS Motor Protection Circuit Breaker 9-12.5A – NOS

$74.99

This item is new and has never been used. It may be unused in its original packaging, be old stock, new open-box, new out of box, or never installed. Packaging might be missing, opened, or show minor damage. The item is fully functional and includes all accessories shown in the listing and images, unless otherwise noted.
SKU: 862201
In stock (1 available)
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    Free Shipping Lower 48

  • 30-Day Returns

    30-Day Returns

  • 90-Day Warranty

    90-Day Warranty

Manufacturer:

Model Number: Motor Protection Circuit Breaker

Series: SIRIUS 3RV2

MPN: 3RV2021-1KA10

Listed Item Condition: New/New Other

Product Details:

Summary

  • Siemens SIRIUS 3RV2021-1KA10 three-pole motor protection circuit breaker with an adjustable thermal overload release range of 9–12.5A, instantaneous magnetic short-circuit release of 163A, and Class 10 trip characteristics. Features a rotary ON/OFF operating handle, screw terminals, and a compact S0 frame for industrial motor protection applications.
  • This listing includes one Siemens 3RV2021-1KA10 motor protection circuit breaker only. No original box, instructions, manuals, wiring, or additional accessories are included. Please review all photos for the exact item, condition, and components included.
  • This item was sourced from a new, uncommissioned equipment cabinet that was dismantled prior to being placed into service.

Product Description

  • The Siemens SIRIUS 3RV2021-1KA10 is a three-pole thermal-magnetic motor protection circuit breaker designed to protect electric motors against overload, short-circuit, and phase-failure conditions. The adjustable thermal release allows the protection setting to be matched to motor requirements within the 9–12.5A range, while the instantaneous magnetic release provides short-circuit protection.
  • The breaker features a manual rotary operating handle, Class 10 overload tripping, screw-type connections, and a compact S0 housing suitable for 35mm DIN rail installation in industrial motor control panels, machinery, and automation systems.

Product Information

- Manufacturer - Siemens
- Model Number - 3RV2021-1KA10
- Series - SIRIUS 3RV2
- MPN - 3RV2021-1KA10
- Product Type - Motor Protection Circuit Breaker
- Circuit Breaker Type - Thermal Magnetic
- Number of Poles - 3
- Frame Size - S0
- Adjustable Thermal Overload Release - 9–12.5 A
- Instantaneous Short-Circuit Release - 163 A
- Trip Class - Class 10
- Rated Operating Voltage - 20–690 V AC
- Operating Frequency - 50/60 Hz
- Rated Insulation Voltage - 690 V AC
- Rated Impulse Withstand Voltage - 6 kV
- Phase Failure Detection - Yes
- Terminal Type - Screw Terminals
- Mounting Type - 35mm DIN Rail or Screw Mounting
- Operating Mechanism - Rotary ON/OFF Handle
- Operating Temperature - -20°C to +60°C
- Protection Rating - IP20
- Country of Origin - Germany
- EAN - 4011209902138
- Quantity Included - 1 Circuit Breaker

What's Included:

  • Siemens 3RV2021-1KA10 SIRIUS Motor Protection Circuit Breaker 9-12.5A

Compatible Parts:

Return Info: 30-Day Returns

Warranty Info: 90-Day Warranty

Dimensions: 4 × 2 × 4 in, Weight: 0.12 lbs

Shipping Info: Free shipping applies to items being delivered within the contiguous United States (lower 48). HI, AK, PR, and all other US Territories, and International locations will have shipping calculated during checkout. Please be advised if the item is large or is a multi-piece shipment, shipping quotes may be inaccurate due to restrictions outside of our control, in those instances you will be contacted promptly.

Terms:

All items sold at Max Marine Electronics come as you see in the pictures provided, with only the parts and accessories stated in the description section named “What’s Included”. IF YOU DO NOT SEE SOMETHING YOU EXPECT TO BE INCLUDED IN THE DESCRIPTION WE PROVIDE, IT WILL NOT BE INCLUDED. Read all descriptions thoroughly. There are times when a display is used only to show the item being sold is functional and working properly. In this case, these displays are not included. If you have any questions feel free to reach out to Max Marine Electronics. We always want to be transparent with our customers and fully disclose any information regarding the products we sell.

***PLEASE NOTE***Buyers outside the contiguous United States:
We strive to provide accurate shipping quotes at checkout. However, for satellites, radars, large items, or multi-piece shipments, system and carrier limitations may sometimes result in incorrect estimates. If this happens with your order, our team will reach out to you right away to ensure you receive the best possible shipping solution. Your satisfaction is our priority!

Categories Power Management » Circuit Protection, Specialty Parts » Installation Hardware and Parts
QTY Available 1
Date Added Oct 19, 2026
Location

2027503

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