Tesla MCB3P20 3 Pole 20 Amp 6kA C Curve Miniature Circuit Breaker

Description

Twenty amps of three-phase protection. Workhorse of the distribution board.

The Tesla MCB3P20 is a 3 Pole 20A 6kA C Curve Miniature Circuit Breaker built to IEC/EN60898. It protects three-phase distribution circuits from overload and short-circuit faults — reliable, DIN rail-ready, and approved for Australian switchboard use.

• 3 Pole / 20A / 6kA breaking capacity
• C Curve — general-purpose, handles moderate inrush
• 415V AC / 50-60Hz
• Thermal-magnetic trip — bi-metal overload + magnetic short-circuit
• DIN rail mount — 3 module width, 35mm rail
• Pillar clamp terminal — rigid conductor up to 25mm²
• IP20 rated for enclosed switchboard installation
• IEC/EN60898 — Australian approval number V08030
• Mechanical life: 10,000 cycles | Electrical life: 4,000 cycles
• HPC2 Series — available 10A to 63A

Fast shipping across Australia — order online now for quick dispatch.

Built for the Board, Rated for the Job

The 20A rating sits at a practical midpoint in the HPC2 three-pole range — commonly specified for higher-load general circuits, HVAC sub-circuits, and commercial power distribution in three-phase boards where 16A leaves insufficient headroom. The thermal-magnetic trip mechanism delivers two-stage protection: a bi-metal strip handles sustained overloads, while a magnetic element trips instantaneously on short-circuit fault current. At 6kA breaking capacity, it's rated for fault levels typical in commercial and light industrial distribution boards across Australia.

The C Curve characteristic is the right call for general loads with moderate inrush. It won't nuisance-trip on start-up, but it will clear a genuine fault fast. For high-inrush motor or transformer loads, a D Curve is the correct selection.

Termination and Installation

Clips straight onto 35mm DIN rail. The pillar clamp terminal accepts rigid conductors up to 25mm² — no ferrules required. At 3 modules wide, it keeps multi-circuit boards compact and tidy. IP20 is appropriate for use inside any enclosed switchboard or distribution enclosure.

Compliance You Can Specify With Confidence

Manufactured to IEC/EN60898 with Australian regulatory approval number V08030. The HPC2 Series covers the full range from 10A to 63A in both single-pole and three-pole configurations — one product family for the whole board.

Q: When should I choose a 20A MCB over a 16A?
A: Choose 20A when the calculated circuit load or cable sizing exceeds 16A, or where a circuit feeds higher-demand equipment such as HVAC units, commercial appliances, or denser lighting loads in three-phase sub-boards. Both the MCB3P16 and MCB3P20 share identical construction — only the current rating differs.

Q: Is the Tesla MCB3P20 approved for use in Australian switchboards?
A: Yes. The MCB3P20 carries Australian regulatory approval number V08030 and is manufactured to IEC/EN60898. It is suitable for use in compliant Australian switchboard installations.

Q: What conductor sizes does the MCB3P20 accept?
A: The pillar clamp terminal accepts rigid (solid or stranded) copper conductors up to 25mm². This covers the conductor sizes typically associated with a 20A three-phase circuit in commercial and industrial switchboard applications.