Electrical Ratings and Application Context
The 3RT1026-3AV60: Rated for 11 kW at 400 V in AC-2 duty class, this contactor is suited for starting and stopping slip-ring motors or wound-rotor motors where the starting current is moderate. For reversing or inching duty (AC-4), the rated operational current is 15.5 A at 400 V, which governs the thermal stress during frequent switching. The main contact configuration is three normally open poles with zero normally closed poles, so any auxiliary NC function must be provided by an external block. Short-circuit protection coordination is specified: for Type 2 coordination (no damage to the contactor after a fault), a gL/gG fuse rated 35 A is required; for Type 1 coordination (contactor may need replacement), a 100 A gL/gG fuse is permitted. This distinction matters for panel builders who must document SCCR and selectivity per IEC 60947-4-1.
Mounting and Integration
Mounts via screw or snap-on onto a 35 mm standard mounting rail per DIN EN 50022. The 45 mm width and 85 mm height fit the S0 footprint, common across the SIRIUS contactor family. Side-by-side mounting is permitted without derating, which simplifies multi-contactor assemblies in a control panel. The front face carries an IP20 rating; the terminal area is IP00, meaning the wiring zone must be protected from accidental contact within the enclosure.
Environmental and Wiring Specifications
Operates over an ambient temperature range of -25 °C to +60 °C during operation, with a maximum altitude of 2 000 m without derating. Pollution degree 3 (conductive pollution or dry non-conductive pollution that becomes conductive due to condensation) is assumed, which is typical for industrial control cabinets. Main circuit terminals accept screw-type connections: solid or stranded conductors from 2x (0.25... 2.5 mm²) up to a maximum of 2x 10 mm², or AWG equivalents of 2x (16... 12) to 1x 8.
Sourcing and Procurement Note
As an active-production part, the 3RT1026-3AV60 is sourced through standard Siemens distribution channels. For audit and compliance purposes, the manufacturer provides the usual documentation package: the part carries a reference code per DIN EN 81346-2 (Q for power switching equipment). Procurement should verify that the specific project requires the 3RT1026-3AV60 variant (screw terminals, 3-pole NO, size S0) rather than a similar frame size or terminal type, as the SIRIUS family includes multiple variants with different auxiliary contact configurations and coil voltages.