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Compact grey IEC contactor, 4-pole, DIN-rail mount, screw terminals

SIEMENS

SIEMENS 3RT23161BB40 IEC Magnetic Contactor 4NO 24V DC 4P Non-Reversing

SKU CH-2WJR-QW966

IEC magnetic contactor with 4 NO contacts, 24 V DC coil, 9 A inductive and 18 A resistive ratings, DIN-rail or surface mounting

  • 4 normally open poles switch 18 A resistive loads
  • 24 V DC coil voltage suits low-voltage control circuits
  • Non-reversing design simplifies starter wiring for single-direction motors
  • DIN rail and surface mounting options fit standard S00 frames
  • Compact 3.08 in height by 1.97 in width saves panel space

IEC 4-pole 24V DC contactor

The SIEMENS 3RT23161BB40 is a non-reversing IEC magnetic contactor with four normally open power poles. It operates from a 24V DC coil and is rated for 9 A inductive and 18 A resistive full-load current. The unit uses screw terminals and mounts on DIN rail or directly on a surface within the S00 frame size.

Panels needing four switched poles without reversing

This contactor suits control panels that require four-pole switching for motors, heating or lighting loads where a reversing function is not needed. The 24V DC coil integrates with low-voltage PLC outputs or safety relays. Installations that need built-in auxiliary contacts, an enclosed housing or AC coil operation should look at a different device.

24V DC coil voltage

The coil voltage is the single specification that determines whether this contactor matches the control circuit. A 24V DC coil will not operate on AC supplies or higher DC voltages, so the control source must provide exactly 24V DC.

How it compares

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

Price $76.99
Pricier than about 61% of the 1,098 comparable items (median $61.99).

Specifications

Product
Brand nameSIEMENS

Questions about this item

Should I pick the 4-pole version or a 3-pole alternative for my motor circuit?

This contactor provides four normally open poles rated 9 A inductive and 18 A resistive at 24 V DC, so choose it when you need to switch four lines simultaneously without auxiliary contacts.

What does the 9 A inductive rating mean when the contactor is installed in a control panel?

It indicates the maximum continuous inductive load each pole can carry at 24 V DC coil voltage without overheating when mounted on DIN rail or surface.

How does the IEC frame size S00 limit the wire size I can connect to the screw terminals?

Frame size S00 defines the physical envelope and terminal capacity for this series; the screw terminals accept conductors suited to the 9 A inductive and 18 A resistive ratings.

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