Description
The Schneider Electric S143A is a miniature circuit breaker designed to protect electrical circuits from overloads and short-circuit conditions in low-voltage installations. It provides reliable automatic disconnection to safeguard wiring and connected equipment. This device is commonly used in industrial control panels, commercial buildings, and electrical distribution boards.
Technical Specifications
| Condition |
New/Never Used Surplus |
| Brand |
Schneider Electric |
| Category |
Circuit Protection |
| Part Number |
S143A |
| Subcategory |
Miniature Circuit Breakers |
| Breaker Type |
Miniature circuit breaker (MCB) |
| Trip Technology |
Thermal-magnetic |
| Number of Poles |
3 |
| Rated Voltage |
Up to 400 V AC |
| Rated Current |
Application-dependent (A-curve characteristic) |
| Mounting Type |
DIN rail |
| Frequency |
50/60 Hz |
| Application |
Branch circuit and equipment protection |
| Standards Compliance |
IEC standards for MCBs |
| Weight |
0.88 lb |
Information About S143A
The S143A is part of Schneider Electric’s miniature circuit breaker product range originally developed under the Merlin Gerin brand for reliable circuit protection. It features a compact, DIN-rail mountable design that allows efficient use of panel space and simplified installation. The breaker is compatible with standard low-voltage AC systems and integrates easily with modular distribution components. Its thermal-magnetic trip technology ensures dependable response to both sustained overloads and instantaneous fault currents.
Key Features:
- Miniature Circuit Breaker Design: Provides automatic protection against overload and short-circuit faults.
- Thermal-Magnetic Trip Mechanism: Combines thermal and magnetic elements for accurate fault response.
- Multi-Pole Configuration: Suitable for protecting multi-phase circuits.
- DIN-Rail Mounting: Enables quick installation and replacement in distribution panels.
- Compact Form Factor: Optimizes space utilization in control cabinets.
- Low-Voltage Application: Designed for standard AC distribution systems.
- Durable Construction: Built for long-term operation in electrical installations.
The S143A delivers the reliability and precision required for dependable circuit protection in low-voltage electrical systems.
