Description
The SMO-P series of molded case circuit breakers is a compact low-voltage protection device. Specifically designed for industrial, commercial, and special environments, this series is based on advanced international design and manufacturing technologies. It is suitable for AC 50/60Hz circuits, with a maximum rated operating voltage of 690V AC and a rated current range from 6A to 800A. It is widely used for overload, short – circuit, and undervoltage protection in power distribution networks, motor protection, and industrial control systems. The SMO-P series takes high breaking capacity, modular design, and environmental adaptability as its core advantages.
Core Performance Features
Excellent Short – circuit Protection Ability
- According to the ultimate short – circuit breaking capacity (Icu), it is divided into Type C (basic type), Type L (standard type), Type M (higher breaking type), and Type H (high – breaking type). The maximum breaking capacity can reach 70kA (depending on the model).
- The zero – arcing or short – arcing design reduces the arc risk and ensures operational safety. Some specifications support horizontal or vertical installation.
Flexible Configuration and Modular Design
- Pole selection: 2P (double – pole), 3P (triple – pole), 4P (quadruple – pole) to meet the protection requirements of single – phase, three – phase, and neutral wires.
- Trip type:
- Thermal – magnetic tripper (fixed characteristics, B/C/D curves).
- Electronic tripper (adjustable long – time delay, instantaneous, short – time delay, such as SMO-PE type).
- Installation methods: Fixed – type, plug – in type, draw – out type (such as SMO-P – 400H/3370), which is convenient for maintenance and replacement.
High Reliability and Environmental Adaptability
- The protection level is IP20 (standard type), and it can be upgraded to IP54 with special accessories, adapting to humid, salt – fog, oil – fog, and mildew environments.
- The operating temperature range is from – 5°C to + 40°C ( + 45°C for marine models), and the altitude should not exceed 2000m.
Intelligence and Expansion Functions
- Optional accessories such as auxiliary contacts, alarm contacts, shunt trip coils, undervoltage trip coils, etc. can be equipped to achieve remote monitoring and fault diagnosis.
- The CPI (Circuit Breaker Status Indicator Window) intuitively displays the on – off state, improving the operation and maintenance efficiency.
- Halogen – free materials are used, complying with RoHS and REACH regulations to support sustainable development.
Technical Parameters
| Parameter | Specification |
| Model Examples | SMO-P – 63L/3P, SMO-P – 125L/3P, SMO-P – 225M/3P, SMO-P – 400H/3370, SMO-P – 800H/3300, SMO-P – 1600H/3300 |
| Rated Voltage (Ue) | 400V (SMO-P – 63), 690V (other models) |
| Rated Current (In) | 6A to 800A (sectional selection) |
| Ultimate Short – circuit Breaking Capacity (Icu) | 5kA to 70kA (depending on the model and breaking level) |
| Insulation Voltage (Ui) | 500V (SMO-P – 63), 800V (other models) |
| Impulse Withstand Voltage (Uimp) | 4kV to 8kV (depending on the model) |
| Trip Type | – Thermal – magnetic (B/C/D curves) – Electronic (adjustable long – time delay, instantaneous, short – time delay) |
| Installation Methods | Fixed – type, plug – in type, draw – out type |
| Environmental Requirements | – Operating temperature: – 5°C to + 45°C – Humidity: ≤95% RH (non – condensing) |
FAQ
What is the Rated Voltage (Ue) for
For SMO-P-100A, the listed Rated Voltage (Ue) is 400V (SMO-P - 63), 690V (other models). Confirm the exact configuration against your project requirements before ordering.
What is the Rated Current (In) for
For SMO-P-100A, the listed Rated Current (In) is 6A to 800A (sectional selection). Confirm the exact configuration against your project requirements before ordering.
What is the Impulse Withstand Voltage (Uimp) for
For SMO-P-100A, the listed Impulse Withstand Voltage (Uimp) is 4kV to 8kV (depending on the model). Confirm the exact configuration against your project requirements before ordering.
What is the Insulation Voltage (Ui) for
For SMO-P-100A, the listed Insulation Voltage (Ui) is 500V (SMO-P - 63), 800V (other models). Confirm the exact configuration against your project requirements before ordering.