YSM5 Molded Case Circuit Breaker (MCCB) | 16A–800A AC400V–690V
YSM5 Molded Case Circuit Breaker (MCCB) | 16A–800A AC400V–690V
This is a custom-made product. Please contact us to discuss your specifications and receive a quotation.
Description
YSM5 Molded Case Circuit Breaker (MCCB)
The YSM5 is a new-generation molded case circuit breaker (MCCB) developed to international standards with advanced manufacturing technology. Designed for AC 50/60Hz power distribution networks rated at 400V and 690V, it provides reliable overload, short-circuit, and undervoltage protection for circuits and power equipment from 16A to 800A. The YSM5 can also be used for infrequent switching of circuits under normal operating conditions.
Product Range
- 24 rated current specifications across 6 frame sizes
- 2–3 breaking capacity levels per frame for flexible selection
- Operational breaking capacity: Ics = 22–75kA (selectable)
Key Features
- Compact & High Breaking Capacity: Small footprint with high short-circuit breaking performance
- Zero Arc Flash Option: Install zero arc flash cover to achieve zero arc flash operation
- Flexible Mounting: Supports both vertical (upright) and horizontal installation
- Isolation Function: Equipped with isolation capability (symbol: —×)
- Thermal-Magnetic Protection: Long-time delay overload protection + instantaneous short-circuit protection
- High Altitude Rated: Suitable for altitudes up to 2000m; derating table available for higher altitudes
- Wide Temperature Range: −20°C to +70°C operating range; special orders available for −25°C to +40°C
- Environmental Resistance: Resistant to humidity, mold, salt spray, and oil mist
Technical Specifications
| Rated Frequency | AC 50/60Hz |
| Rated Current Range | 16A – 800A |
| Rated Working Voltage | AC 400V / 690V |
| Rated Insulation Voltage | 800V (160A frame) / 1000V (125–800A frames) |
| Operational Breaking Capacity (Ics) | 22–75kA (selectable) |
| Frame Sizes | 6 frame levels |
| Installation Category | Main circuit: Category III; Auxiliary circuit: Category II |
| Max Altitude | 2000m (derating required above 2000m) |
Standards Compliance
- GB/T 14048.1 — Low-voltage switchgear, Part 1: General (IEC 60947-1)
- GB/T 14048.2 — Low-voltage circuit breakers (IEC 60947-2)
- GB/T 14048.4 — AC contactors and motor starters (IEC 60947-4)
- GB/T 14048.5 — Control circuit devices (IEC 60947-5-1)
OEM/ODM available. Contact Wanlong Electric for custom specifications, volume pricing, and technical support.
Care
To maintain the beauty and integrity of your purchase, we recommend treating it with care. Simple maintenance practices, such as gentle washing and proper storage, can effectively preserve the longevity of your favorites. We encourage you to refer to the care instructions included with each item, designed to help you keep your purchase in top condition.
Design
Our dedication to excellence extends beyond materials; it encompasses the artistry and craftsmanship illustrated in every piece we create.