3RT1926-2FK21

The 3RT1926-2FK21 is a solid-state auxiliary contact module for power-off delay protection specifically designed for Siemens SIRIUS 3RT10 series contactors. It has two sets of changeover contacts, a delay range of approximately 0.5 to 10 seconds, and is compatible with a wide range of AC/DC voltages from 12 to 240V. It is suitable for various sizes, including S0 to S12, and is ideal for control circuits with power-off delay protection.

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Siemens 3RT1926-2FK21 Power-off Delay Solid State Auxiliary Contact Module

Product Positioning

The 3RT1926-2FK21 is a solid-state power-off delay auxiliary contact module from Siemens' SIRIUS large contactor series. When the contactor coil is de-energized, the module switches the contact state after a set time delay, making it suitable for control circuits requiring power-off buffering or interlocking protection. The module can be directly installed on a matching 3RT10 contactor without additional wiring modifications.

Core Product Advantages and Features

Off-Delay Function

The coil switches contacts with a delay after power failure, making it suitable for interlocking protection and buffer control applications.

2 sets of changeover contacts

It provides two sets of CO (switching) contacts, which can drive multiple control loops simultaneously.

Delay range: 0.5~10 seconds

The delay time can be finely adjusted according to the actual process requirements.

Wide-range control voltage

AC/DC 12 to 240V wide voltage compatibility design reduces selection complexity.

Solid-state electronic design

Compared to mechanical time relays, it has stable operation and a longer lifespan.

Multi-size compatibility

It can be installed on various Siemens SIRIUS 3RT10 contactors, from S0 to S12.

project	Specification
brand	Siemens
Product Series	SIRIUS 3RT10 / 3RT19 Accessories
model	3RT1926-2FK21
Product Type	Solid-state power-off delay auxiliary contact module
Contact configuration	2 sets of CO conversion type contacts
Delay range	Approximately 0.5 to 10 seconds
Rated control voltage	AC/DC 12~240V
Applicable size	S0, S2, S3, S6, S10, S12

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