Mitsubishi Electric NF630-SEW 3P 630A Moulded Case Circuit Breaker – WS-V Series, 50kA @ 400V, Electronic Trip Unit Supplier | SIMPLYBUY
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Mitsubishi Electric NF630-SEW 3P 630A Moulded Case Circuit Breaker – WS-V Series, 50kA @ 400V, Electronic Trip Unit
Mitsubishi Electric NF630-SEW 3P 630A Moulded Case Circuit Breaker – WS-V Series, 50kA @ 400V, Electronic Trip Unit - Image 2
Mitsubishi Electric NF630-SEW 3P 630A Moulded Case Circuit Breaker – WS-V Series, 50kA @ 400V, Electronic Trip Unit - Image 3

Mitsubishi Electric NF630-SEW 3P 630A Moulded Case Circuit Breaker – WS-V Series, 50kA @ 400V, Electronic Trip Unit

ParameterValue
Product TypeMoulded Case Circuit Breaker (MCCB)
Brand / SeriesMitsubishi Electric / WS-V Series (NF-S Type)
Model NumberNF630-SEW 3P 630A
Material Number204789
Frame Size (AF)630 AF
Number of Poles3-pole (3P3d)
Rated Current (In)630A
Adjustable Trip Range (Ir)300–630A
Trip Unit TypeElectronic
Rated Operational Voltage (Ue)690V AC
Rated Insulation Voltage (Ui)690V
Rated Impulse Withstand Voltage (Uimp)8kV
Breaking Capacity (Icu) @ 200/230V AC85kA
Breaking Capacity (Icu) @ 380/400/415V AC50kA
Breaking Capacity (Icu) @ 440V AC42kA
Breaking Capacity (Icu) @ 500V AC30kA
Breaking Capacity (Icu) @ 690V AC10kA
Service Breaking Capacity (Ics) @ 400V AC50kA (100% of Icu)
Utilisation CategoryB
Connection TypeFront lugs or bar connections
Dimensions (W × H × D)140mm × 257mm × 155mm
Weight6.5 kg
Electrical Durability (440V AC, with load)1,000 operations
Mechanical Durability (at no load)6,000 operations
Pollution Degree3
Standards & CertificationsIEC 60947-2, EN 60947-2; CE, UKCA, UL/cUL, RoHS
Marine ApprovalsLR, DNV·GL, BV, ABS, CCS
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Product Description

The Mitsubishi NF630 series is a line of molded case circuit breakers (MCCBs) designed for robust electrical protection in industrial and commercial applications. These breakers operate in AC systems with rated frequencies of 50/60 Hz and are suitable for circuits up to 630A, supporting voltages up to 690V. They provide comprehensive protection against overloads, short circuits, earth leakage, and undervoltage conditions in distribution networks. Ideal for power distribution and motor protection, they handle infrequent circuit switching or motor starting.

Standard Features

Encased in durable plastic housings, NF630 models feature fixed mounting, manual or motorized operation, and air-arc quenching. Compliant with IEC 60947-1/2, GB/T 14048 standards, and CCC-certified, they ensure reliability in harsh environments with altitudes ≤2,000m and ambient temperatures from -5°C to +40°C.

  • Multi-Protection Functions:Integrates safeguards against overload, short circuit, earth leakage, and undervoltage

  • Versatile Configurations:Available in 3P (3-pole) and 4P (4-pole) versions for flexible phase compatibility

  • High Breaking Capacity:Offers strong short-circuit interruption, with Icu up to 1000kA and Ics up to 1200kA depending on models

  • Multiple Mounting Options:Supports front/rear terminal wiring and fixed installation for easy maintenance

  • Durable Construction:Sealed molded case ensures resistance to dust, humidity, and corrosion, with a mechanical lifespan of 10 years

  • Compliance & Certification:Meets IEC 60947, GB/T 14048, and CCC standards

Technical Specifications

ModelRated current In (A)

Number of Poles

NF630-CW500,600,6302,3
NF630-SW2,3,4
NF630-SEWAdjustable 300 350 400 500 600 6303,4
NF630-HEW3,4
NF630-REW3

Mitsubishi Electric NF630-SEW 3P 630A Moulded Case Circuit Breaker – WS-V Series, 50kA @ 400V, Electronic Trip Unit

Manufacturer: Mitsubishi Electric
Model: NF630-SEW 3P 630A
Material Number: 204789
Type: Moulded Case Circuit Breaker (MCCB)
Series: WS-V Series / NF-S Type (Standard Class)
Frame Size: 630 AF
Rated Current (In): 630A
Adjustable Trip Range (Ir): 300–630A
Number of Poles: 3-pole (3P3d)
Breaking Capacity (Icu @ 400V): 50kA
Trip Unit: Electronic
Application: Power distribution, industrial control panels, and machinery protection

The Mitsubishi Electric NF630-SEW 3P 630A is a high-performance moulded case circuit breaker from the WS-V series, engineered for reliable over-current and short-circuit protection in demanding industrial and commercial power distribution systems. With a 630A frame and an adjustable electronic trip unit spanning 300–630A, it offers precise coordination and flexible protection settings. The breaker delivers an ultimate breaking capacity of 50kA at 400V AC and 42kA at 440V AC, ensuring robust fault current interruption. Its compact dimensions (140mm W × 257mm H × 155mm D) and front lug/bar connection design make it ideal for panel builders seeking a space-efficient, high-reliability solution. Compliant with IEC/EN 60947-2 and CE marked, the NF630-SEW is suitable for global applications, including marine use with LR, DNV·GL, BV, ABS, and CCS approvals.

  • Adjustable Electronic Trip Unit: Over-current protection with an adjustable tripping threshold from 300A to 630A, enabling precise coordination with upstream and downstream devices.

  • High Breaking Capacity: Delivers 50kA Icu at 400V AC and 42kA at 440V AC, ensuring reliable protection under high fault current conditions.

  • Compact & Robust Construction: Space-saving 140mm width with a durable moulded case, suitable for panel mounting in space-constrained enclosures.

  • WS-V Series Reliability: Built with Mitsubishi Electric‘s advanced breaking technology, offering enhanced interrupting performance and long electrical/mechanical life.

  • Versatile Connection Options: Supports front lugs or bar connections for flexible wiring configurations.

  • Global Compliance & Marine Approvals: Certified to IEC/EN 60947-2, CE, UL/cUL, UKCA, and RoHS compliant; approved for marine use by LR, DNV·GL, BV, ABS, and CCS.

  • Pollution Degree 3 Rated: Designed for reliable operation in industrial environments with pollution degree 3.

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