Siemens
Siemens 3RV2021-4BA20: Size S0 Motor Protection Circuit Breaker
Siemens 3RV2021-4BA20 Size S0 Motor Protection Circuit Breaker
● In Stock
12-Mo Warranty
Same-Day Dispatch
Ships Worldwide
🎖 Veteran-Owned
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Response within 1 business hour
12-month warranty
All units tested
Same-day dispatch
Order by 2pm CST
Worldwide delivery
US, EU, Asia, Middle East
Veteran-owned
CAGE: 9NK75
Adjustable thermal overload protection
Class 10 tripping
Spring-type terminals
High short-circuit rating
DIN rail mountable
Product description
The Siemens 3RV2021-4BA20 is a Size S0 motor protection circuit breaker featuring spring-type terminals for quick and secure installation. It offers an adjustable thermal overload protection (A-release) range of 13 to 20 Amps and a fixed magnetic short-circuit release (N-release) of 260 Amps, all with Class 10 tripping characteristics.
This breaker is designed for reliable motor protection in industrial automation, control panels, and machinery where ease of wiring and vibration resistance are important.
Stanlo Automation, your veteran-owned source for surplus industrial parts, provides the Siemens 3RV2021-4BA20, ensuring quality components for your automation needs.
Technical specifications
| Size | S0 |
| Class | 10 |
| A-release | 13-20 A |
| N-release | 260 A |
| Terminals | Spring |
Common applications
Motor protection
Industrial automation
Control panels
Machinery
Process control
Compatible systems
Compatible with Siemens SIRIUS motor starter systems and associated accessories.
Also known as
Siemens 3RV2021-4BA20 breaker
SIRIUS 3RV2 motor protection
Replaces / compatible with
This Siemens 3RV2021-4BA20 uses spring-type terminals for faster installation compared to screw terminals on similar models.
Technical note
Expert tip
The spring terminals are ideal for environments with significant vibration, ensuring a robust and reliable electrical connection.What happens next?
1
Email confirmation
Immediate receipt acknowledgment sent to you
2
Account manager assigned
Confirms your part's spec and condition
3
Your quote delivered
Tailored to your specific requirements
Frequently asked questions
What are the advantages of the spring-type terminals on the 3RV2021-4BA20?
Spring-type terminals offer faster wiring, reduced risk of loose connections due to vibration, and consistent contact pressure over time, making installation and maintenance more efficient.