Integrator's Spec Recap — 3RT1015-1BB42-ZW97
The Siemens SIRIUS 3RT1015-1BB42-ZW97 is a size S00 power contactor with a 24 V DC coil. It mounts on a 35 mm DIN rail per EN 50022 via screw and snap-on fastening, and uses screw-type terminals for both main and auxiliary circuits. Rated operational current at AC-12 is 10 A maximum. The coil draws 3.3 W during closing and holds at 3.3 W DC — a fixed-gap magnetic circuit that stays at full power, no economizer. This matters for control-transformer sizing: the inrush is the same as the hold. Mechanical life is rated at 30,000,000 cycles typical. Operating temperature range is -25 to +60 °C, with pollution degree 3 environment — suitable for control panels in industrial floors where conductive dust or humidity is present.
Panel Integration — DIN Rail & Wiring
Width is 45 mm, height 57.5 mm, depth 72 mm — standard S00 footprint. Side-by-side mounting is permitted, so multiple contactors pack tightly on the rail without derating for heat buildup in a typical enclosed panel. Terminals accept solid or stranded conductors: 2x (0.5 to 1.5 mm²), 2x (0.75 to 2.5 mm²), and max 2x (0.75 to 4 mm²). AWG equivalents are 2x (20 to 16), 2x (18 to 14), and 1x 12. This covers common control and power wiring up to 4 mm² for the main circuit. IP20 on the front and at the terminals — finger-safe when installed in a closed panel, but not rated for washdown or outdoor exposure without an enclosure.
Lifecycle & Sourcing Reality
The -ZW97 suffix denotes a special version. The base order code 3RT1015-1BB42 shares the same electrical ratings and physical footprint. RoHS compliance date is 01.07.2006.
Coordination & Protection
With type of coordination 2 (no welding after short circuit), the required upstream fuse is gL/gG 20 A. For type 1 coordination (welding allowed but no fire risk), the fuse is gL/gG 35 A. This guides the panel builder on branch-circuit protection sizing.