ND63T100 – SIEMENS 3P1000A 600V TRIP ND FRAME

The Siemens ND-frame series is considered a legacy/hard-to-find product line, and new stock can be very limited. Northern Breaker Group specialises in sourcing obsolete and hard-to-find breakers, so we can often supply reconditioned, tested surplus, or new-old-stock units. Contact us for current availability and we'll advise on the best option for your application.

A 1000A, 3-pole, 600V MCCB like the SIEND63T100 is commonly applied as a main disconnect or main breaker in commercial/industrial services, provided the panelboard or switchboard is rated for a 1000A main and the breaker's short-circuit interrupting rating meets or exceeds the available fault current at that point in the system. Always verify the AIC (ampere interrupting capacity) against your utility's available fault current before installation.

In Siemens ND-frame nomenclature, the 'T' typically denotes a specific trip unit type (such as a thermal-magnetic or solid-state trip configuration). Different suffix variants can indicate interchangeable or electronic trip units, different interrupting ratings, or accessory provisions. If you need to match a direct replacement for an existing installation, share your original breaker's full nameplate data with us and we'll ensure you receive the correct variant.