SENTRON Insta Contactor — 230 V AC Control, 1 NO + 1 NC
The Siemens 5TT5001-6 is a SENTRON Insta contactor with a 1 NO + 1 NC contact configuration, designed for switching loads up to 20 A at 400 V AC. Control voltage is 230 V AC or 220 V DC, giving flexibility whether the panel runs on line-voltage control or a DC bus. At 17.5 mm wide (1 modular width unit), it occupies a single DIN-rail slot — a compact footprint for distribution boards or control panels where space is tight. The 71 mm depth and 90 mm height fit standard enclosure depths, but the installation note calls for spacers between units to allow heat dissipation from the 1.7 W per-pole power loss at rated current. IP20 finger-safe protection means it is suitable for enclosed panel mounting where no washdown or dust ingress protection is required. Supplementary devices can be added for auxiliary functions, extending the contactor's capability without replacing the base unit.
Panel Integration and Thermal Management
The 64 mm installation depth (shallower than the 71 mm overall depth) means the contactor body sits recessed behind the DIN rail, leaving clearance behind the panel backplate for wiring or busbars. The 17.5 mm width per unit allows up to 16 contactors per standard 280 mm DIN-rail section. Siemens explicitly requires spacers between adjacent units for heat dissipation — the 1.7 W per-pole loss at rated current accumulates in a dense row. In a 16-unit row, total heat load reaches 54.4 W, which must be vented or the contactors derated. Plan for 5–10 mm air gaps or forced convection in sealed enclosures. AC/DC actuation voltage means the same part works with either 230 V AC control transformers or 220 V DC control supplies from a battery-backed system — no need to stock separate AC and DC coil variants for mixed-control panels.
Sourcing and Lifecycle — Active Production
As a SENTRON-branded Insta contactor, it is part of Siemens' standard building and industrial control portfolio. The part is sourced through authorized distribution channels and quoted to order against the BOM quantity. Availability and current pricing are confirmed at RFQ time. No official successor or cross-reference is recorded — this is the current active variant for the 1 NO + 1 NC, 230 V AC control configuration.