Product Overview
Siemens 3RT2018-1AB01 3-Pole Power Contactor with 3RT2916-1BB00 Varistor Surge Suppressor
Condition
Used. Hand-pulled from decommissioned equipment. Evaluation: Visual inspection only. Function testing not performed. Markings legible: SIEMENS SIRIUS 3RT2018-1AB01, 24V 50/60Hz on contactor; 3RT2916-1BB00 on surge suppressor module. Includes one contactor and one clip-on varistor surge suppressor module.
Ships same or next business day from our Idaho warehouse. Honest pricing, no nonsense.
Online since 1999. We are here for our customers, with a no-hassle satisfaction guarantee.
Product Overview
Siemens SIRIUS 3RT2018-1AB01 is a compact Size S00 three-pole power contactor designed for switching motors and inductive industrial loads. Operating on a 24V AC 50/60Hz control circuit, this unit handles operational currents up to 16A at 400V (AC-3 duty) with an integrated normally open auxiliary contact for status feedback or interlocking circuits.
This unit includes a matching Siemens 3RT2916-1BB00 clip-on varistor surge suppressor module, rated for 24-48V AC and 24-70V DC, which snaps directly onto the top coil terminals to clamp inductive voltage spikes and protect upstream PLC outputs and control relays.
Key Features
- Size S00 frame with 3 normally open main power poles
- 24V AC 50/60Hz control coil
- 16A AC-3 operational current at 400V (7.5 kW motor rating)
- 22A AC-1 operational current rating up to 690V
- 1 integrated normally open (13NO-14NO) auxiliary contact
- Screw clamp terminals accepting 20 to 12 AWG copper conductors
- Mounting via standard 35mm DIN rail snap-fit or M4 screw pattern
- Includes Siemens 3RT2916-1BB00 clip-on varistor surge suppression module
Applications
- Replacing worn contactors in automation panels, motor control centers, and machine tool cabinets
- Controlling three-phase pumps, blowers, and conveyor drives up to 10 HP at 460V
- Providing isolated power switching for workshop machinery, phase converters, and compressor retrofits
- Building hobbyist CNC spindle control boxes and automated test benches requiring low-voltage 24V coil switching
Frequently Asked Questions
Can the contactor be operated on a 24V DC coil circuit?
No. The 3RT2018-1AB01 contactor coil is specifically rated for 24V AC at 50/60Hz. Applying 24V DC to an AC coil will cause continuous high inrush current and coil burnout.
How does the included 3RT2916-1BB00 surge suppressor install?
The varistor module clips directly into the accessory slots on the front top face of the contactor, making direct electrical connection to the A1 and A2 coil terminals without requiring external wiring.
Are mounting hardware or wire ferrules included?
Not included.
What is the condition of this unit, and what testing was performed?
This contactor was pulled from decommissioned industrial equipment and has undergone a thorough visual inspection confirming housing integrity, terminal screws, and legible labeling. Function testing has not been performed. It is covered by our satisfaction guarantee.
Clean industrial German engineering built to switch heavy loads all day, ready to drop straight into your control cabinet or bench build.
