The Siemens 5TT5000-2 is a SENTRON Insta contactor with two normally-open contacts, designed for switching resistive and motor loads in DIN-rail control panels. The coil accepts 230 V AC, and the control circuit can be driven by either AC or DC at 24 V — a dual-voltage actuation that simplifies wiring in mixed-supply cabinets. Rated for 400 V and 20 A per the product description, this contactor handles moderate lighting, heater, and small motor loads within a single modular-width unit (17.5 mm). The IP20 enclosure is standard for dry indoor panel environments.
Installation and thermal management
Snaps onto standard DIN rail, occupying one module width (17.5 mm). The installation note explicitly requires spacers between adjacent units to allow heat dissipation — a detail that matters when populating dense rows of contactors. Depth is 71 mm, with an installation depth of 64 mm, leaving clearance behind the DIN rail for wiring. Power loss is 1.7 W per pole in hot operating state at rated current AC. That thermal load adds up in a multi-contactor panel, so the spacer requirement isn't optional — it keeps the contactor within its thermal design envelope.