Tesla MCB10K3P40 Circuit Breaker 40 Amp 3 Pole C Curve 10kA Rating Energy Class 3

Description

High fault capacity for demanding boards

The Tesla MCB10K3P40 is a 40 amp, three-pole miniature circuit breaker with a 10kA short circuit capacity. It protects against both overload and short circuit while providing a function of isolation, making it suited to installations where prospective fault current exceeds the reach of a standard 6kA device.

Key Features

• 40A rated current, 3 pole
• C curve tripping characteristic
• High short circuit capacity: Icn = Ics = 10kA
• Energy Limiting Class 3
• Protection against overload and short circuit
• Function of isolation
• Contact position indication
• DIN and chassis mount
• Box quantity 4, carton quantity 40

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Why it Matters

Where 10kA is required
Prospective short circuit current rises the closer a board sits to the supply transformer. Where that figure exceeds a 6kA device rating, a 10kA breaker is needed. With Icn equal to Ics at 10kA, this unit is rated to interrupt its full fault current and remain serviceable afterwards, rather than being rated for a single interruption only.

Energy Limiting Class 3
Class 3 is the highest energy limiting classification applied to miniature circuit breakers. It indicates the breaker clears a fault quickly enough to hold let-through energy low, reducing the thermal and mechanical stress passed on to downstream cabling and equipment during a short circuit.

Isolation and mounting
The breaker provides a function of isolation, so it can be used to positively disconnect the circuit for maintenance. Contact position indication shows the true state of the contacts at a glance. It mounts on either DIN rail or chassis, giving flexibility across switchboard and enclosure builds.

What does a 10kA rating mean on this circuit breaker?
It is the short circuit breaking capacity. The Tesla MCB10K3P40 has Icn equal to Ics at 10kA, meaning it can interrupt a 10,000 amp fault and remain in service.

Is the MCB10K3P40 a three-phase circuit breaker?
Yes. It is a three-pole device, so all three phases are switched and protected together from a single toggle.

Can this breaker be chassis mounted?
Yes. The Tesla 10kA MCB range supports both DIN rail and chassis mounting.

Warranty

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