The Siemens 3RV2021-4NA15 is a factory-grade motor protection circuit breaker designed to safeguard electric motors against overloads and short circuits. Featuring a Class 10 thermal magnetic trip unit, it offers reliable protection with adjustable current settings between 23 to 28 amps. This model belongs to the Siemens 3RV2 series and comes in the compact S0 frame size, ideal for various industrial applications. The 3-pole configuration and screw terminal electrical connections provide secure and convenient installations on DIN rails. Built to endure demanding industrial environments, the 3RV2021-4NA15 also includes integrated auxiliary contacts (NO + NC) for enhanced control and signaling capabilities. This motor protector is well-regarded for its robustness, ease of adjustment, and compatibility with motors up to 15 kW power rating at voltages ranging from 220 to 690V AC, making it a top choice for automation and motor control systems.
Key Features of Siemens 3RV2021-4NA15
Class 10 thermal magnetic overload protection with adjustable range from 23 to 28 A
Suitable for motors up to 15 kW power rating
Compact S0 frame size for space-saving panel installation
3-pole design with screw terminal electrical connections
Integrated auxiliary contacts (Normally Open + Normally Closed) for control integration
DIN rail mounting for standard industrial setup
Short circuit release rated at 364 A for reliable fault interruption
Operating voltage range: 220 to 690V AC
Front-mounted rotary dial for easy current setting adjustment
Explore Siemens 3RV2021-4NA15 datasheet for detailed parameters
Specification
Details
Frame Size
S0
Current Range
23–28 A
Motor Power Rating
Up to 15 kW
Number of Poles
3
Operating Voltage
220–690 V AC
Short Circuit Release
364 A
Connections
Screw terminals
Applications / Use Case
This Siemens 3RV2021-4NA15 is commonly used in industrial automation where reliable motor protection is critical. It is ideal for machine automation, production line systems, and factory control panels requiring precise overload and short circuit protection. Its adjustable current settings and integrated auxiliary contacts make it suited to protect and monitor motors in conveyor systems, packaging machinery, and other motor-driven industrial equipment. Industries relying on stable motor function and safety often incorporate this model as part of their control systems to minimize downtime and prevent damage.
Price & Availability
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3RV2021-4NA15
$0.00
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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