The YCB7-63N series is a high-performance Miniature Circuit Breaker (MCB) designed to provide reliable overload and short-circuit protection in AC 50/60Hz electrical installations. Complying with the IEC/EN 60898-1 standard, it is engineered for a wide range of applications, from residential and commercial buildings to industrial facilities. The series is known for its industrial aesthetic, robust construction with high flame-retardant materials, and features like a magnetic arc quenching device and a clear contact indicator window for safe operation.
This MCB series is rated for voltages up to 230/400V and offers a comprehensive current range from 1A to 63A. A core variant within this lineup is the **32 amp 4 pole mcb**, which provides complete four-pole protection for circuits requiring full neutral and phase isolation. Key electrical features include a rated breaking capacity (Icn) of 6kA, an impulse withstand voltage of 4kV, and B, C, or D tripping characteristics. Mechanically, it boasts a long service life with 20,000 mechanical operations and 10,000 electrical operations at rated load.
The YCB7-63N offers selectable tripping curves (B, C, D) to match different load types, from residential lighting (B curve) to circuits with higher inrush currents like motors or transformers (D curve). The 32 amp 4 pole mcb is particularly suited for protecting three-phase distribution boards, machine control panels, and any application where simultaneous isolation of all live conductors is crucial for safety and maintenance.
Designed for ease of use, the breaker features a modular design for fast clip mounting on standard 35mm DIN rails (EN 60715). It supports top or bottom wiring and accepts both cables and pin-type busbars up to 25mm². Its compact dimensions and IP20 protection degree make it ideal for installation in distribution cabinets. The product is also compatible with various accessories like shunt trips (MX) and auxiliary contacts (OF) for extended functionality.
| YCB7 | - | 63 | N | 1P | C | 16 |
| Model | Shell grade current | Breaking capacity | Number of poles | Tripping characteristics |
Rated curren | |
| Miniatur circuit breaker e |
63 | N:6kA | 1P 2P 3P 4P |
B C D |
1 2 4 6 10 16 20 25 32 40 50 63 |
Note:This product can be assembled with accessories(YCB7-63N OF/SD/OF+SD/ MX/ MVMN/MX+OF, etc)
| Type | Standard | IEC/EN 60898-1 | ||
| Comprehensive data | Function | Overload, Short circuit, Isolation | ||
| Number of poles | 1P,2P,3P,4P | |||
| Rated current In | A | 1-63A | ||
| Rated frequency | Hz | 50/60Hz | ||
| Electrical features | Rated voltage Ue | V | 230/400 | |
| Rated insulation voltage Ui | V | 500 | ||
| Rated breaking capacity Icn | A | 6000 | ||
| Rated impulse withstand voltage Uimp(1.2/50） | kA | 4 | ||
| Pollution degree | 2 | |||
| Use category | II、III | |||
| Trip type | Thermal magnetic release | |||
| Thermal magnetic tripping characteristics | B,C,D | |||
| Electrical and mechanical accessories | 口 | |||
| Mechanical features | Mechanical life | Times | 20000 | |
| Electrical life | Times | 10000 | ||
| Protection degree | IP20 | |||
| Antihumidity and heat resistance | The relative humidity of the air is not more than 50% when the ambient air temperature is +40°C, and it can have a higher relative humidity at a lower temperature | |||
| Reference ambient temperature | °C | 30 | ||
| Ambient temperature | °C | -5°C-+40°C, the average value of 24h does not exceed +35°C | ||
| Height | m | Not exceeding 2000 | ||
| Installation | Terminal connection type | Cable/Pin-type busbar | ||
| Maximum wire capacity |
Terminal size | mm² | 25 | |
| top/bottom for cable | AWG |
18-3
|
||
| Terminal size | mm² | 25 | ||
| top/bottom for busbar | AWG |
18-3
|
||
| Torque | N*m | 2 | ||
| In-lbs | 18 | |||
| Tool | 18 | Phillips screwdriver or flat-blade screwdriver | ||
| Installation | On DIN rail EN 60715 (35mm) by means of fast clip device | |||
| Wiring method | From top or bottom | |||
| Type | Test current | Tripping time | Expected result | Type | Test current | Tripping time | Expected result | |
| B,C,D | 1.13In | t≤1h(In≤63A) | Not tripping | B | 3In | t≤0.1s | Not tripping | |
| 1.13In | t≤2h(In>63A) | C | 5In | t≤0.1s | ||||
| B,C,D | 1.45In | t<1h(In≤63A) | Tripping | D | 10In | t≤0.1s | ||
| 1.45In | t<2h(In>63A) | B | 5In | t＜0.1s | Tripping | |||
| B,C,D | 2.55In | 1s<t<60s(In≤32A) | Tripping | C | 10In | t＜0.1s | ||
| 2.55In | 1s<t<120s(In>32A) | D | 20In | t＜0.1s |
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