The YCB9-125 4P C125 is a high-capacity miniature circuit breaker (MCB) designed to protect electrical circuits from overload and short-circuit faults. With a Type C tripping curve, it is optimized for circuits with moderate inductive loads such as motors, HVAC systems, and transformers.
Its four-pole configuration supports three-phase systems with neutral protection. The breaker mounts easily on a DIN rail, includes a contact position indicator, and complies with IEC60947-2 and IEC/EN 60898-1 standards for safe and reliable operation.
TECHNICAL DETAILS:
| Parameter | Value |
| Model | YCB9-125 |
| Type | Miniature Circuit Breaker (MCB) |
| Poles | 4P (Four Pole) |
| Rated Current | 125A |
| Tripping Curve | Type C |
| Rated Voltage | AC 230/400V |
| Breaking Capacity | 6000A |
| Standards | IEC60947-2, IEC/EN 60898-1 |
| Protection | Overload & Short Circuit |
| Mounting | DIN rail (35mm) |
| Terminal Type | Cable / Busbar |
| Max Cable Size | 50 mm² / AWG 18–1/0 |
| Torque | 3.5 N·m |
| Contact Indicator | Yes |
| Protection Level | IP20 |
| Operating Temp | –5°C to +40°C |
| Storage Temp | –25°C to +70°C |
| Mechanical Life | 10,000 operations |
| Electrical Life | 1,500 operations |
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