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.

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Photo of the normally closed auxiliary contact of the Siemens SIRIUS 3RT2015-1JB42 miniature contactor DC24V.

Product Positioning

The 3RT2015-1JB42 is a model in the SIRIUS S00 frame DC24V screw terminal contactor series, featuring a normally closed (1NC) auxiliary contact design. The contact opens when energized and remains closed when not energized or de-energized. This design is particularly useful for interlocking protection, fail-safe circuits, or applications requiring monitoring of the contactor's standby status. The main circuit specifications are the same as other DC24V products in the series, allowing direct drive of the coil via PLC output or a 24V DC power supply, facilitating integration with existing control systems.

Core Product Advantages and Features

1NC normally closed auxiliary contact

The contact logic is the opposite of that of the normally open type, which facilitates the design of interlocking protection and abnormal monitoring circuits.

DC24V coil

It can be directly driven by the PLC output point or a 24V DC power supply, simplifying the control circuit.

Screw terminal wiring

The terminals are securely locked, making them suitable for applications requiring flexible wire diameter selection or frequent maintenance.

S00 Small Standard Frame

It shares the same form factor as screw terminal contactors in the same series, and spare parts can be mutually supported.

High mechanical life

The mechanical operating life is approximately 30 million cycles, making it suitable for long-term use in continuous production equipment.

project	Specification
model	3RT2015-1JB42
series	Siemens SIRIUS 3RT2 (S00)
Extreme number	3-pole (3P)
coil voltage	DC 24V
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	Approximately 0.294 kg
Applicable Standards	IEC 60947-4-1

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