3RA2813-1FW10

The 3RA2813-1FW10 is a time-delay solid-state auxiliary switch with 1NC and 1NO contacts, screw terminals, and dimensions of approximately 45×38×74mm. It has an IP20 protection rating, a control voltage of 24 to 240V AC/DC, and can be mounted in front of SIRIUS 3RT2 S00 to S3 contactors. It also features a built-in surge suppressor.

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Siemens 3RA2813-1FW10 Solid State Delay Auxiliary Switch Screw Terminal

Product Positioning

The 3RA2813-1FW10 is the screw terminal version of the Siemens SIRIUS 3RA28 series solid-state delay auxiliary switch. It features a power-on delay function and provides one set of normally closed and one set of normally open contacts, making it suitable for control panel designs that prefer screw-locked wiring.

Core Product Advantages and Features

Power-on delay function

The contactor's output contacts operate with a delay after being powered on, making it suitable for constructing sequential start control logic.

Screw terminals

The wires are secured with screws to facilitate identification and replacement of wiring during future maintenance.

1NC plus 1NO dual contact

It provides both normally closed and normally open outputs, which can flexibly meet the needs of different control loops.

IP20 basic protection

It possesses the basic dust protection level required for installation inside a typical control panel.

project	Specification
Model (MLFB)	3RA2813-1FW10
Product Type	Solid-state delay auxiliary switch
Delay function	Power-on delay
Contact configuration	One normally closed group + one normally open group (1 NC + 1 NO)
Terminal type	Screw terminals
Control power supply voltage	24…240V AC/DC, 50/60Hz
Delay setting range	0.05…100 seconds
Rated current of contacts	AC-15 maximum 3A (250V)
Applicable contactors	SIRIUS 3RT2 (S00 to S3)
External dimensions	Approximately 45×38×74mm
Protection level	IP20
Operating ambient temperature	-25…+60°C

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