Circuit Protection

NXB-60 MCB 3P 10A-63A DIN Rail 6kA 400V

Walax NXB-60 three-pole MCB for three-phase distribution at 400V. Standard protection for small-motor feeders, three-phase socket outlets, and sub-main circuits in industrial and commercial installations across 50Hz and 60Hz markets.

Three-Phase Protection

All three poles trip simultaneously on fault — protects downstream three-phase equipment from single-phasing and phase-to-phase faults.

400V 50/60Hz

Rated for both 50Hz and 60Hz three-phase grids — covers the full export market including Africa, Asia, Middle East and Latin America.

D-Curve for Motors

D-curve calibration trips at 10-20× rated current — the right specification for motor starting applications without nuisance tripping.

Specifications

Technical Specifications

Standard ratings listed below – custom configurations available on request. Contact our engineers to confirm parameters for your market.

StandardIEC 60898-1 · CE
Rated current10A – 63A
Poles3P
Rated voltageAC 400V (50/60Hz)
Breaking capacity6kA
Tripping curveC / D
Electrical life≥ 4,000 operations
Mechanical life≥ 20,000 operations
Mounting35mm DIN rail
Terminal capacityUp to 25 mm²
Module width54mm (3-pole)
Ambient temperature-5°C to +40°C
Applications

Where This Breaker Ships

Three-phase sub-boards feeding small motors (pumps, compressors, fans), three-phase socket outlets, workshop power distribution, and three-phase lighting loads. NXB-60 is widely used as the main breaker for small industrial control panels.

FAQ

Frequently Asked Questions

Yes — the D-curve calibration trips at 10-20× rated current, suitable for direct-on-line motor starting. For high-inrush loads (welding equipment, large motors) consider our MCCB range.
NXB-60 is the 6-63A frame; NXB-125 is the higher-current 10-125A frame. Same form-factor family, different current ratings. Choose based on your circuit current and breaking capacity requirements.
Yes — 4P (three-phase + neutral) NXB-60 versions are available for TN-S and TT distribution systems. Same module, one extra pole.
This NXB-60 is rated for AC three-phase only. For DC circuits see our DC MCB 1000V 4P product.
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