Tesla MCB10K3P63 Miniature Circuit Breaker 63 Amp Three Pole 10kA C Curve DIN Rail or Chassis Mount

Description

The highest rating in the three pole range.

Submains and large three phase feeders draw more current than a mid range breaker can carry, and the fault levels behind them are often well past 6 kA. The Tesla MCB10K3P63 is a three pole, 63 amp miniature circuit breaker with a full 10 kA short circuit capacity, C curve tripping and Energy Limiting Class 3 performance.

Key Features

• Rated current: 63A
• Number of poles: 3 pole
• Tripping curve: C
• Short circuit capacity: 10kA
• Icn equal to Ics at the full 10 kA rating
• Energy Limiting Class 3
• Highest current rating in the Tesla 10 kA MCB range
• Protection against overload and short circuit
• Function of isolation
• Contact position indication
• DIN and chassis mount
• Sold individually, box quantity of 4, carton quantity of 40

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Why Icn Equals Ics Matters

Two breaking capacity figures are published for a miniature circuit breaker. Icn is the ultimate capacity, the largest fault the device can interrupt at all. Ics is the service capacity, the largest fault it can interrupt and then remain in full service afterwards.

On many breakers Ics is only a fraction of Icn, so a severe fault clears safely but the device should then be replaced. On the MCB10K3P63 the two figures are equal at 10 kA. After a full rated fault the breaker remains a serviceable device rather than a consumable one.

Energy Limiting Class 3 is the highest of the three classes defined for this measure. It describes how much let-through energy reaches downstream conductors and equipment before the contacts part.

Three Pole Switching and Isolation

All three poles trip together, so a fault on any one phase disconnects the whole circuit. That behaviour matters on three phase equipment in Australian switchboards, where leaving a load energised on the remaining phases risks damage.

Tesla also lists the function of isolation for this range. The device provides a defined isolating gap when open, and contact position indication shows the true state of the contacts rather than the handle alone. Both are useful when a circuit is being proven dead before work starts.

Where 63 Amps Sits in the Range

The three pole 10 kA family runs at 6, 10, 16, 20, 25, 32, 40, 50 and 63 amps. This SKU is the top of that range, the one to reach for on the heaviest three phase circuit a miniature circuit breaker suits before moving up to a moulded case device.

The MCB10K3P63 accepts both DIN rail and chassis mounting, so it suits new switchboard builds as well as retrofits into older boards with no DIN rail fitted. Because the whole family shares one breaking capacity, a board can be populated end to end without mixing fault ratings. Supply is one unit per order, box quantity 4, carton quantity 40. Pole configurations are listed in the specification table.

What is the current rating of the Tesla MCB10K3P63?
It is rated at 63 amps across three poles, the highest current rating offered in the Tesla 10 kA miniature circuit breaker range.

What is the breaking capacity of the Tesla MCB10K3P63?
The short circuit capacity is 10 kA, and Icn is equal to Ics at that figure. The breaker also carries Energy Limiting Class 3, the highest of the three energy limiting classes.

Can the Tesla MCB10K3P63 be chassis mounted?
Yes. Tesla lists this 10 kA range as both DIN and chassis mount, so it can sit on standard DIN rail or be fixed directly to a chassis where no rail is present.

Warranty

This product is backed by an extended manufacturer warranty - click here for details.