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Siemens Timing Relay: Off Delay, 0.05 sec – 100 sec, 1NO - Front-Mounted IEC Delay Timers
SiemensFront-Mounted IEC Delay Timers

Siemens Timing Relay: Off Delay, 0.05 sec – 100 sec, 1NO

The SIEMENS Timing Relay (MPN 3RA28121DW10) is a front-mounted IEC delay timer with an off-delay function, adjustable from 0.05 sec to 100 sec, featuring a 1NO contact and a 24-240V AC/DC coil. It has a maximum…

SKU 3G-OTH-40512

Brand
Siemens
Item
Timing Relay: Off Delay, 0.05 sec – 100 sec, 1NO
Category
Front-Mounted IEC Delay Timers
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Technical Specifications

Siemens
Manufacturer Part Number
3RA28121DW10
Mounting
Front
Compatible with Series
3RT2 Contactors
Maximum Voltage Rating
240V AC/DC
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Siemens Products
3G Electric (S) Pte. Ltd. — Singapore

Product Description

The SIEMENS Timing Relay (MPN 3RA28121DW10) is a front-mounted IEC delay timer with an off-delay function, adjustable from 0.05 sec to 100 sec, featuring a 1NO contact and a 24-240V AC/DC coil. It has a maximum voltage rating of 240V AC/DC and is compatible with 3RT2 contactors.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

Frequently Asked Questions

What is the SIEMENS 3RA28121DW10 timing relay used for?

The SIEMENS 3RA28121DW10 is a front-mounted IEC off-delay timer used to control timing sequences in industrial motor control and automation systems. It is compatible with 3RT2 contactors and provides adjustable delays from 0.05 sec to 100 sec for applications such as conveyor sequencing and pump control.

What are the specifications of the SIEMENS 3RA28121DW10 timing relay?

The SIEMENS 3RA28121DW10 is an off-delay timing relay with a 1NO contact, adjustable from 0.05 sec to 100 sec. It operates on a 24-240V AC/DC coil and has a maximum voltage rating of 240V AC/DC. It mounts on the front and is compatible with 3RT2 contactors.

Where to buy the SIEMENS 3RA28121DW10 timing relay worldwide?

You can source the SIEMENS 3RA28121DW10 timing relay worldwide through 3G Electric, a global industrial equipment distributor. We handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time.

How to install the SIEMENS 3RA28121DW10 timing relay?

Mount the SIEMENS 3RA28121DW10 timing relay on the front of a compatible 3RT2 contactor. Connect the coil to a 24-240V AC/DC supply and wire the 1NO contact into your control circuit. Adjust the off-delay time between 0.05 sec and 100 sec using the front dial. Always follow local electrical codes.

Used in

Common applications for Siemens
District cooling plants — LME73 + RWF55 for condenser-water modulation
Inflight catering and food-processing steam boilers — LMG22 with SQN90 air-fuel cross-damper
Hospital steam-plant redundancy — LME41 with QRA2 UV flame detection for dual-fuel boilers
Semiconductor fab process heat — LME23 and SKP55 gas valves on hot-oil heater skids
Container-terminal reefer-deck heating — LMG22 retrofit onto legacy burner racks

Siemens Products

3G Electric supplies Siemens front-mounted iec delay timers. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.

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