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Siemens 3RA2814-1FW10 Solid-State OFF-Delay Auxiliary Switch

Siemens 3RA2814-1FW10 solid-state OFF-delay auxiliary switch.

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ManufacturerSiemens

Part number3RA2814-1FW10

Part Number 3RA2814-1FW10

Manufacturer Siemens

Type Solid-State Auxiliary Switch

Function OFF-Delayed

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OFF-delay timing with control signal 1 NC + 1 NO relay contacts Wide voltage range (24-240V AC/DC) Integrated varistor for coil protection Direct snap-on mounting Solid-state operation

Product description

The Siemens 3RA2814-1FW10 is a solid-state auxiliary switch featuring an OFF-delayed function with a control signal input. It provides one normally closed (NC) and one normally open (NO) relay output. The time range is adjustable from 0.05 to 100 seconds, operating on a 24-240 V AC/DC supply at 50/60 Hz. This switch includes an integrated varistor for surge suppression on contactor coils, uses screw terminals, and is designed for snap-on mounting onto Siemens 3RT20 contactors and 3RH2 contactor relays.

This OFF-delay auxiliary switch is crucial for applications requiring a timed delay after a control signal is removed. It's used in scenarios like sequential processes, cooling-down periods, or phased de-energization of components in industrial machinery and automation environments.

Stanlo Automation, your trusted veteran-owned surplus distributor, offers the Siemens 3RA2814-1FW10. We are committed to providing essential automation components to minimize downtime and ensure the efficient operation of your industrial systems.

Technical specifications

Part Number	3RA2814-1FW10
Manufacturer	Siemens
Type	Solid-State Auxiliary Switch
Function	OFF-Delayed
Control Signal	Yes
Contacts	1 NC + 1 NO
Time Range	0.05-100 s
Voltage	24-240 V AC/DC
Frequency	50/60 Hz
Protection	Integrated Varistor
Terminals	Screw
Mounting	Snap-on to 3RT20 and 3RH2

Common applications

Machine Control

Automation Processes

Industrial Timers

Sequential Operations

Control Panel Components

Manufacturing

Compatible systems

Siemens 3RT20 Contactors Siemens 3RH2 Contactor Relays Automation Control Systems Industrial Control Panels

Also known as

Siemens 3RA2814-1FW10 timer switch SIRIUS 3RA28 OFF-delay auxiliary Siemens control signal delay switch

Replaces / compatible with

Designed for direct snap-on mounting to Siemens 3RT20 contactors and 3RH2 contactor relays, this auxiliary switch provides integrated OFF-delay timing controlled by an external signal.

Technical note

Expert tip

The control signal input allows for precise timing of auxiliary functions following the removal of a primary control command, enhancing automation sequence logic.

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Frequently asked questions

How does the Siemens 3RA2814-1FW10 auxiliary switch function with a control signal?

The Siemens 3RA2814-1FW10 operates as an OFF-delayed switch. When the control signal is removed, the timing cycle begins, and the output contacts switch after the preset delay, allowing for controlled de-energization or sequencing.