3RT2015-1KB42

The 3RT2015-1KB42 is a Siemens SIRIUS S00 miniature 3-pole contactor with a built-in suppression diode in the DC24V coil, which can reduce surge interference when the coil is de-energized. It is suitable for direct drive by PLC output points. The main contacts are AC-3 rated at 7A, 3kW/400V, and equipped with one set of normally closed auxiliary contacts.

Share To

Photo of Siemens SIRIUS 3RT2015-1KB42 miniature contactor with built-in suppressed diode DC24V

Product Positioning

The 3RT2015-1KB42, among DC24V screw terminal contactors in the same series, features a built-in integrated suppressor diode design. This effectively absorbs the back EMF surge generated when the coil is released, protecting semiconductor components in the PLC output module or control circuit from damage. It is a relatively safe choice when directly driven by a PLC. This model has one normally closed (1NC) auxiliary contact, suitable for use with interlocking protection or abnormal detection logic. The main circuit specifications are consistent with the S00 frame contactors in the same series.

Core Product Advantages and Features

Built-in suppression diode

The surge wave at the moment the coil is de-energized is absorbed by the built-in diode, protecting the PLC output point and surrounding electronic components.

1NC normally closed auxiliary contact

Suitable for designing interlocking protection, abnormal monitoring, or control loops that require reverse logic.

DC24V coil

It can be directly driven by a PLC output module or a 24V DC power supply, without the need for an external protection circuit.

Screw terminal wiring

Both the main and auxiliary circuits use screw-locked terminals, ensuring secure wiring and easy maintenance.

S00 Small Frame

It is lightweight and uses the same DIN rail mounting standard as other products in the same series.

High mechanical life

With a mechanical operating life of approximately 30 million cycles, it is suitable for high-frequency automated control applications.

project	Specification
model	3RT2015-1KB42
series	Siemens SIRIUS 3RT2 (S00)
Extreme number	3-pole (3P)
coil voltage	DC 24V (built-in suppression diode)
Auxiliary contact	1NC (Group 1 normally closed)
Wiring method	Screw terminals
Rated operating current (AC-3)	7A
Rated operating power (AC-3, 400V)	3kW
Mechanical life	Approximately 30 million times
Electrical life (AC-4)	Approximately 200,000 uses (derating).
Enclosure protection rating	IP20
Installation method	35mm DIN rail (EN60715)
External dimensions (height x width x depth)	58 x 45 x 73 mm
net weight	0.294kg
Applicable Standards	IEC 60947-4-1

Recommend

3RT2015-1QB41

The 3RT2015-1QB41 is a Siemens SIRIUS S00 miniature 3-pole contactor with a DC24V coil and screw terminal wiring. The main contacts are AC-3 rated at 7A, 3kW/400V. The operating temperature range is from -25 to 60 degrees Celsius, making it suitable for outdoor distribution boxes with large temperature differences. It also has one set of normally open auxiliary contacts.

3RT2015-1KB41

The 3RT2015-1KB41 is a Siemens SIRIUS S00 miniature 3-pole contactor. The DC24V coil features dual surge suppression with a built-in suppressor diode and an external varistor, making it suitable for PLC output applications with stringent surge requirements. The main contacts are AC-3 rated at 7A, 3kW/400V, and equipped with one set of normally open auxiliary contacts.

3RT2015-1JB42

The 3RT2015-1JB42 is a Siemens SIRIUS S00 miniature 3-pole contactor with a DC24V coil and screw terminal wiring. The main contacts are AC-3 rated at 7A, 3kW/400V. The auxiliary contacts are one set of normally closed (NC) contacts, suitable for interlocking protection and abnormal monitoring circuits that detect the contactor's non-operational state.