Circuit Protection

YW5S1-63 1P 20A DIN Rail MCB 6kA

Walax-manufactured EAST-equivalent YW5S1-63 single-pole MCB calibrated at 20A with C-curve tripping. Optimised for general lighting and small-power socket circuits where moderate inrush currents (motors, transformers) are expected.

20A Calibrated Stock

Pre-calibrated at 20A C-curve — ideal specification for socket outlet and lighting sub-circuits in residential distribution boards.

C-Curve Tripping

Trips between 5× and 10× rated current — suited to circuits with moderate inrush loads (small motors, transformers, fluorescent lamps).

Tropicalised Build

Anti-humidity treatment and corrosion-resistant contacts for installation in coastal and tropical environments.

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 current20A (fixed, calibrated)
Poles1P
Rated voltageAC 230V (50/60Hz)
Breaking capacity6kA
Tripping curveC (5×In – 10×In instantaneous)
Electrical life≥ 4,000 operations
Mechanical life≥ 20,000 operations
Mounting35mm DIN rail
Terminal capacityUp to 25 mm²
TropicalisationAnti-humidity treatment as standard
Ambient temperature-5°C to +40°C
Applications

Where This Breaker Ships

General-purpose 20A lighting and socket circuits in residential distribution boards. C-curve calibration handles the inrush current of small motors, transformers and fluorescent lamp loads without nuisance tripping.

FAQ

Frequently Asked Questions

B curve trips at 3-5× rated current (pure resistive loads). C curve trips at 5-10× (motors, transformers, fluorescent). D curve trips at 10-20× (large motors, welding equipment).
Yes — 20A C-curve is the standard specification for ring-main or radial socket circuits in most residential installations. Verify cable sizing and local code requirements.
Yes — same frame, same footprint, different calibration. Contact us with your requirements for B16/B20/B32 or D20/D32 equivalents.
18 months from shipment date against manufacturing defects. Replacement units dispatched immediately for any quality issue.
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