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3RT2045-1KB40 Siemens
Original price
$450.00
-
Original price
$1,402.50
Original price
$450.00
$450.00
-
$1,402.50
Current price
$450.00
Trusted By
Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The Siemens SIRIUS 3RT2045-1KB40 is a 3-pole DC-coil power contactor designed for motor control and switching in industrial automation systems. Part of the SIRIUS 3RT contactor family, this model provides AC-3e/AC-3 switching capability up to 80 A (37 kW at 400 V) with an integrated varistor for coil surge suppression, and includes one normally open plus one normally closed auxiliary contact. Typical uses include motor starter assemblies, machinery control panels, and PLC-controlled switching applications.
Best Suited For
- Automated motor control in PLC-based systems
- Starter panels in manufacturing machinery
- Protection against coil voltage transients via built-in varistor
- Applications requiring compact 3-pole contactors in S3 frame size
Rated operational current (AC-3, 400 V)
80 A
Coil control voltage
24 V DC
Auxiliary contacts
1 NO + 1 NC
Power loss (hot state, total)
15.9 W
Weight
1.834 kg
Technical Specifications
I/O & Electrical
Rated operational current (AC-3, 400 V)
80 A
Motor power rating (400 V, AC-3)
37 kW
Number of main poles
3
Communication & Power
Coil control voltage
24 V DC
Integrated varistor
Yes
Auxiliary contacts
1 NO + 1 NC
Power loss (hot state)
15.9 W total; 5.3 W per pole
Physical & Environmental
Frame size
S3
Weight
1.834 kg
Mechanical service life
10 000 000 cycles typical
