I'm using MCBs on one of my projects involving a battery pack. Is it safe to connect using an AC MCB (Brand Legrand India) for switching between the states (on/off)?

Vbat < 100 V, expected current < 40 A.

  • 4
    \$\begingroup\$ If you are switching DC, you must use an MCB that's rated for DC (and in the case of an MCB that supports both, you must follow the DC specific ratings). In particular, DC is "harder" for a circuit breaker to safely interrupt. If you want us to review a particular MCB, we need to see the datasheet and/or specification and not just the brand name. \$\endgroup\$
    – nanofarad
    Aug 5 at 17:13
  • \$\begingroup\$ 100 V is way above what run-off-the-mill AC MCBs will handle. You need a DC rated one. \$\endgroup\$
    – winny
    Aug 5 at 18:08


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