Product Description
Siemens 5SX21 C4 1-Pole 4A Miniature Circuit Breaker
High-reliability industrial automation component tested and verified for mission-critical manufacturing, robotic automation, and CNC drive environments.
Technical Specifications
| Manufacturer Part Number (MPN) | 5SX21 C4 |
| Product Reference (SKU) | 5SX21C4-04 |
| Brand / Manufacturer | SIEMENS |
| Hardware Condition | Used (100% Tested & Verified) |
| Warranty Protection | 6-Month Direct Replacement Warranty |
| System Compatibility | Siemens Low-Voltage Distribution Systems and 35mm DIN Rail Panels |
Quality Assurance & Functional Testing
Manual switching mechanism verified; continuity and contact resistance confirmed in closed position.
Compatibility & Installation Notes
Snap onto 35mm DIN rail. Strip conductor 10mm and torque clamp screws to 2.5 Nm.