Scanford MCB 20A
The PMax Scanford MCB 20A provides essential overcurrent protection for low-voltage electrical circuits. This miniature circuit breaker integrates into standard DIN-rail distributions found in IT server rooms and commercial infrastructure. It utilizes a thermal-magnetic tripping mechanism to safeguard sensitive hardware against short circuits and prolonged overloads. The unit features a robust toggle switch for manual isolation and clear status indication. Engineers use these components to prevent thermal damage to conductors within power distribution units. The device maintains a compact 18mm width per pole to optimize space in high-density enclosures. The internal bimetallic strip handles thermal protection by bending when excess current generates heat over time. This mechanical movement releases the latch to open the circuit. For short circuits, the electromagnetic coil creates a field that instantly pulls the plunger to trip the mechanism. This dual-action approach ensures the circuit remains safe under various fault scenarios. The housing uses high-grade flame-retardant thermoplastic to withstand high temperatures. Terminal clamps feature serrated surfaces to improve wire grip and reduce contact resistance. This prevents localized heating at the connection points.
Key Features
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C-Curve Tripping Characteristic
The internal mechanism allows for 5 to 10 times the rated current to accommodate moderate inrush currents from IT equipment power supplies. -
Arc Extinguishing System
- Integrated arc chute plates dissipate heat rapidly.
- Magnetic blow-out force drives arcs away from main contacts.
- Reduced contact erosion extends the mechanical life of the breaker.
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Installation Versatility
The bi-stable DIN rail clip allows for easy mounting or removal without disturbing adjacent devices on the busbar. -
Visual Status Monitoring
The front-facing toggle clearly indicates the ON, OFF, or TRIPPED positions for rapid troubleshooting during maintenance cycles.
Specifications
| Feature | Specification |
|---|---|
| Rated Current (In) | 20 Amperes |
| Rated Voltage (Un) | 230/400V AC |
| Breaking Capacity | 6kA (6000A) |
| Tripping Curve | Type C |
| Number of Poles | 1P (Single Pole) |
| Mounting Type | 35mm DIN Rail |
| Terminal Capacity | Up to 25mm² |
| Mechanical Life | 20,000 operations |
| Standard Compliance | IEC 60898-1 |
What’s in the Box
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PMax Scanford 20A Miniature Circuit Breaker
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Installation data sheet
Why Choose Scanford MCB 20A
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High breaking capacity ensures the safety of downstream hardware during catastrophic fault conditions.
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Thermal-magnetic coordination provides precise protection against both slow-acting overloads and instantaneous short circuits.
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The 20-ampere rating supports standard power distribution requirements for server cabinets and network racks.
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Silver alloy contacts minimize resistance and reduce heat buildup during continuous operation at full load.
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The modular design simplifies the expansion of existing distribution boards as infrastructure needs grow.
Faith Atieno (verified owner) –
Good 20A breaker. Using it for the water heater circuit and it’s holding up well. Delivery to Kisumu was fast, arrived in two days. Only giving 4 stars because the packaging was a bit squeezed, but the MCB itself was intact.
Kamau Mwangi (verified owner) –
Installed these for a client’s project in Ruiru. The build quality of the Scanford brand is actually decent for the price. Snapped into the DIN rail without any issues.