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Siemens SIRIUS 3RT20 contactor grey plastic housing DIN rail mount 3.6 in high 1.7 in wide screw terminals

SIEMENS

SIEMENS 3RT20271AC20 IEC Magnetic Contactor 24V AC 3P 32A

SKU CH-7PT4-1VD3J

IEC magnetic contactor with 3 poles, 24 V AC coil, 32 A inductive rating and screw-terminal DIN-rail mounting

  • IEC-compliant motor switching with 32 A inductive rating
  • 24 V AC coil suits low-voltage control circuits
  • Three-pole main contacts handle three-phase loads
  • 1 NO + 1 NC auxiliary contacts for status feedback
  • DIN-rail or surface mounting fits standard panels

IEC Magnetic Contactor 32 A 24 V AC

The SIEMENS 3RT20271AC20 is a three-pole IEC magnetic contactor rated for 32 A inductive and 50 A resistive loads at 24 V AC coil voltage. It suits control panels, motor starters and automation cabinets that require a compact DIN-rail or surface-mount switching device.

Auxiliary contacts 1 NO 1 NC screw terminals

Two built-in auxiliary contacts (1 NO, 1 NC) provide immediate feedback or interlock wiring without extra accessories. Screw terminals accept standard ferrules or bare wire, and the SIRIUS 3RT20 frame S0 footprint keeps wiring dense and serviceable.

Check coil voltage mounting space and load type

Verify that your control circuit supplies 24 V AC, not DC, and that the 3.6 in height by 1.7 in width fits your rail layout. Confirm the application is non-reversing and that the 32 A inductive rating covers the intended motor or heater load.

How it compares

Measured against everything we stock in Contactors, Relays & Motor Starters, at today’s prices. Recalculated every night.

Price $192.99
Pricier than about 90% of the 1,098 comparable items (median $61.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

How often should the auxiliary contacts rated at 1NO/1NC be inspected or replaced under normal duty?

The contactor uses two auxiliary contacts rated 1NO/1NC; visual inspection during scheduled panel maintenance is typical, and replacement follows contact wear rather than a fixed interval.

At what current level does the 32 A inductive rating become the limiting factor during continuous operation?

The inductive full-load rating is 32 A; sustained loads above this value will reach the contactor's thermal limit before the 50 A resistive rating applies.

What temperature rise should be expected inside the enclosure when the coil runs at 24 V AC all day?

The 24 V AC coil draws modest power; with the 3.6 in by 1.7 in frame mounted on DIN rail, normal panel ventilation keeps temperature rise within IEC design limits for frame size S0.

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