Buy genuine Siemens 3RV2021-4NA10 online today for your automation system. The Siemens 3RV2021-4NA10 is a premium motor protection circuit breaker designed for reliable overload and short-circuit protection in industrial environments. As part of the SIRIUS 3RV2 series, this device offers robust performance with a trip class of 10, making it ideal for applications requiring fast response to motor overloads. Featuring a compact S0 size and screw terminal connections, the 3RV2021-4NA10 is easy to install on standard DIN rails and integrates seamlessly into control panels. Its phase failure detection and high breaking capacity ensure dependable motor protection, while the adjustable current range (23–28 A) provides flexibility for a wide range of motor loads. Whether you're upgrading an existing system or building a new automation setup, the Siemens 3RV2021-4NA10 delivers factory-grade reliability and safety.
Key Features of Siemens 3RV2021-4NA10
Motor protection circuit breaker with overload and short-circuit protection
Adjustable current range: 23–28 A for flexible motor sizing
Class 10 trip characteristics for fast overload response
Phase failure detection for enhanced system safety
High breaking capacity: up to 100 kA at 240 V AC
Screw terminal connections for secure wiring
Compact S0 size for DIN rail mounting
Compatible with optional auxiliary contacts for signaling and control
UL/CSA certified for use in North American applications
Robust design for industrial automation environments
Technical Specs of 3RV2021-4NA10
Explore Siemens 3RV2021-4NA10 technical data for detailed parameters before installation.
Parameter
Value
Current Range
23–28 A
Short-Circuit Trip
364 A
Breaking Capacity (Icu)
100 kA @ 240 V AC
Operating Voltage
220–690 V AC
Mounting
DIN rail
Size
S0
Protection Class
Class 10
Phase Failure Detection
Yes
Terminals
Screw
Applications / Use Case
This Siemens 3RV2021-4NA10 is commonly used in industrial automation worldwide. It is ideal for protecting motors in factory control panels, production line systems, and packaging and conveyor operations. Its robust design and reliable protection features make it a top choice for engineers and maintenance teams seeking to safeguard critical equipment from overload and short-circuit faults. Whether you need a motor protection solution for a new installation or a replacement for an existing system, the 3RV2021-4NA10 offers proven performance in demanding environments.
Price & Availability
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3RV2021-4NA10
$113.35
ACHIEVING
4.0
average rating
With
95%
positive reviews
LESS THAN
1%
return rate
Any questions?
Does it come with a warranty?
Yes, All products are offered wth 1-Year warranty.
What is the condition of the product?
All products sold are New & Unused.
How fast is shipping?
All products are delivered within 2-8 business days depending on our stock location.
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