Siemens
Siemens 5SX21-C8 8A Miniature Circuit Breaker
Siemens 5SX21-C8 8A Miniature 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
8A rating
Single pole
C-curve tripping
DIN rail mounting
Thermal-magnetic protection
6kA interrupting capacity
Product description
The Siemens 5SX21-C8 is a single-pole miniature circuit breaker with an 8A current rating and a C-curve tripping characteristic. It is designed for the protection of electrical circuits against overloads and short circuits.
This breaker is suitable for a variety of applications in industrial, commercial, and residential electrical distribution systems, offering dependable performance for circuits with normal inrush currents.
Stanlo Automation, a veteran-owned distributor, provides the Siemens 5SX21-C8 with efficient service and timely delivery, ensuring your operational continuity.
Technical specifications
| Amperage | 8A |
| Poles | 1 |
| Voltage | 230/400V AC |
| Tripping Characteristic | C |
| Interrupting Rating | 6kA |
Common applications
Control circuits
Lighting circuits
Motor protection (small)
Appliance circuits
Distribution boards
Compatible systems
Standard 35mm DIN rail systems.
Also known as
Siemens 5SX21 C8, 5SX21-C8 Siemens
Replaces / compatible with
The 5SX21-C8 is a direct replacement for other Siemens 5SX21 series breakers with the same specifications. It can also be used as a substitute for comparable 8A, C-curve, single-pole breakers from other manufacturers if cross-referencing confirms compatibility.
Technical note
Expert tip
Ensure the local electrical codes and standards are met when installing this device.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 is the interrupting capacity of the Siemens 5SX21-C8 circuit breaker?
The Siemens 5SX21-C8 circuit breaker has an interrupting capacity of 6kA (kiloamperes) at 400V. This rating indicates its ability to safely interrupt fault currents without causing damage to the breaker or the electrical system.