NF63-SV 3P 60A Mitsubishi Circuit Breaker NF63CVF 3P 60A No Fuse New Original
Model: NF63-CV | Configuration: 3-Pole, 60A, 440V, 5kA at 400V, Fixed Thermal-Magnetic Trip
The Mitsubishi NF63-CV is an economy class moulded case circuit breaker from Mitsubishi Electric's Japan series, configured for 60A rated current in a 3-pole body.
With a 60AF frame rating, 60AT trip unit, 440V rated insulation voltage, and 5kA short-circuit breaking capacity at 400V, it provides reliable protection for motor branch circuits, feeder applications, and general distribution systems where fault currents remain within economy class interruption limits.
The "NF" designation (No Fuse) reflects the breaker's fundamental design principle: it delivers overcurrent and short-circuit protection without requiring replaceable fuses. Unlike single-use fuses, the NF63-CV resets mechanically after tripping, restoring circuit protection immediately without component replacement.
| Product Model | NF63-CV |
| Product Class | NF-C (Economy) |
| Series | Japan Series |
| Poles | 3-Pole (3P) |
| Rated Current | 60 A |
| Trip Rating | 60 AT |
| Frame Rating | 60 AF |
| Rated Insulation Voltage (Ui) | 440 VAC |
| Rated Impulse Voltage (Uimp) | 6 kV |
| Breaking Capacity (Icu) at 200/230V | 7.5 kA |
| Breaking Capacity (Icu) at 380/400/415V | 5 kA |
| Breaking Capacity (Icu) at 440V | 2.5 kA |
| Trip Unit Type | Fixed Thermal-Magnetic |
| Connection Type | Front lugs or busbars |
| Compliance Standards | IEC 60947-2 / JIS C 8201 |
- No Fuse Design: Mechanical reset after tripping eliminates need for replacement parts
- Fixed Thermal-Magnetic Trip: Combines overload and short-circuit protection in sealed mechanism
- Dual Compliance: Meets both IEC 60947-2 and JIS C 8201 standards
- Economy Class Efficiency: Cost-effective protection for applications with confirmed fault levels below 5kA
- Front Connection: Compatible with cable lugs or busbar systems for panel-board installations
- Accessory Ready: Supports auxiliary contacts, alarm contacts, shunt trip coils, and under-voltage releases
The Japan series NF63-CV with 440V rated insulation voltage is optimized for 200V and 400V class electrical systems, covering Japanese industrial power distribution and international LV industrial supply.
The 5kA breaking capacity at 400V makes it suitable for secondary distribution boards, remote sub-panels, and circuits with cable runs that limit available fault energy.
Important: Confirm prospective fault current at installation point does not exceed 5kA. For higher fault levels, consider NF63-SV (7.5kA) or NF63-HV (10kA) models.
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