Siemens 3VA5112-6EC31-0AA0 Molded Case Circuit Breaker

The 3VA51 frame is the modernized replacement for discontinued Siemens ED-frame circuit breakers, such as the HED4 or HHED6 series. Note that installing this newer frame in an existing panel will require an updated 3VA mounting kit.

While the thermal overload protection is fixed at 125A, the adjustable magnetic instantaneous trip allows you to fine-tune the short-circuit response. This helps achieve proper selective coordination with downstream breakers and accommodates specific load inrush currents.

This breaker is a Class H (High Breaking Capacity) device. This classification corresponds to its robust interrupting ratings, including 65kA at 480VAC and 100kA at 240VAC, making it suitable for high-fault commercial and industrial systems.

It is fully compatible with P1, P2, and P3 panelboards, as well as dedicated 3VA panelboards and switchboards. However, if you are retrofitting it into a space previously occupied by an older frame, you must use the appropriate 3VA-specific mounting strap or hardware.

Yes, this specific configuration includes standard lugs for feed-thru wiring. Always torque the lug set screws to the manufacturer's specifications printed on the breaker faceplate to ensure a secure and compliant connection.

Installation must be performed by a qualified electrician with the panel fully de-energized. Before energizing, verify that the system voltage does not exceed the breaker's 600V maximum rating and that the available fault current is within its interrupting capacity limits.