Siemens 3RT2015-1KB41 Power Contactor
$64.00
The Siemens 3RT2015-1KB41 contactor is a Size S00 3-pole device from the SIRIUS coupling-contactor line, built with a 24V DC coil and integrated suppressor diode. It switches loads up to 3 kW at 400 V AC-3 directly from PLC outputs.
3 in stock
Description
- PLC-Compatible Coil: Accepts 24V DC PLC output signals directly.
- Integrated Suppressor Diode: Protects PLC outputs from inductive transients.
- Size S00 Frame: Saves panel space at 45 mm width.
- Three Main Poles: Switches three-phase loads to 3 kW.
- Long Mechanical Life: Delivers 30 million switching cycles typically.
Documentation
Technical Specifications
| Manufacturer | Siemens |
|---|---|
| Part Number | 3RT2015-1KB41 |
| Type | IEC Contactor |
| Application | Motor Control, Power Switching |
| Series | SIRIUS 3RT2 |
| Compatibility | SIRIUS Overload Relays |
| Operating Current/Power | 18A at 400V AC-1 7A / 3kW at 400V AC-3 1.15kW at 400V AC-4 |
| Coil Voltage | 24V DC |
| Connection Type | Screw Terminals |
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Description
The Siemens 3RT2015-1KB41 is a 3-pole contactor from the SIRIUS 3RT2 family, classified by Siemens as a coupling contactor because it is built to interface PLC outputs directly with three-phase loads in industrial automation panels. The 24V DC coil with a wide 0.7…1.25*Us operating range accepts standard PLC output signals without an intermediate interface relay, simplifying the wiring path between controller and load. The Size S00 frame fits PLC-driven motor and resistive circuits up to 3 kW at 400 V AC-3.
An integrated suppressor diode across the coil protects PLC output stages from inductive switching transients, removing the need to add a separate diode externally. The contactor uses three NO main contacts plus one NO auxiliary, with screw-type terminals on both circuits that accept conductors down to 0.5 mm². A typical mechanical life of 30 million switching cycles supports the high cycle counts typical of PLC-driven control where the contactor may pulse continuously over a shift.
Frequently Asked Questions
Can I drive this contactor directly from a PLC output?
Yes. The 24V DC coil with 0.7–1.25*Us range and integrated suppressor diode is specifically designed for direct connection to standard PLC outputs.
What loads can the 3RT2015-1KB41 switch?
It handles up to 3 kW at 400 V under AC-3 (motor) duty and 18 A under AC-1 (resistive) duty, plus three-phase motors to 3 hp at 480 V.
Does this contactor need an external flyback diode?
No. A suppressor diode is integrated across the 24V DC coil, protecting the driving PLC output from inductive kickback without additional components.
