The Hager MTN140 is a 40A B curve single pole miniature circuit breaker with 6kA rated short-circuit breaking capacity in a 1 module DIN rail body. It suits compatible Hager boards where the installation design calls for a 40A MCB rather than a lower-rated device or an RCBO.

• 40A rated current with B curve tripping characteristic
• 6kA rated short-circuit breaking capacity to IEC 60898-1
• Single pole 1P format in a 1 module body
• 230 to 400V AC rated operational voltage and 50 to 60Hz frequency
• Screw terminal top connection and biconnect bottom connection
• 70mm depth, 17.5mm width and 83mm height
• IP20 protection with 1 to 35mm² rigid and 1 to 25mm² flexible conductor capacity

Where does a 40A MCB fit?

MTN140 should be specified only where the electrical design supports a 40A B curve device. The installer must confirm cable size, load type, installation method, grouping, ambient conditions and disconnection requirements.

Why mention the 6kA rating clearly?

The 6kA breaking capacity is one of the deciding checks for circuit protection. The prospective fault current at the point of installation must be suitable for the protective device selected.

How should it be linked with boards?

Use MTN140 as a related outgoing device for larger Hager boards where 40A MCB-protected circuits are specified. Keep it separate from 40A RCBO or EV consumer unit pages so the buyer lands on the correct device type.

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