Timing relays

SIRIUS timing relays

Electronic time relays are used for all time-delayed switching processes in control, start-up, protection and regulation circuits. Thanks to their compact design, the 3RP20/25 time relays are ideal timer components for control cabinet, switchgear and control system manufacturers from industry. The 7PV15 timing relays especially for use in heating, ventilation, air conditioning and compressors.

SIRIUS timing relays portfolio


Industrial enclosure

Multifunctional timing relays for standard rail mounting - for global use

The SIRIUS 3RP25 timing relays are available for all conventional applications in an industry-standard width of 22.5 mm or space-saving 17.5 mm. Up to 27 functions are integrated in the multifunctional timing relay - with a uniform wide voltage range of 12 to 240 V AC/DC.


Contactor design

Compact timing relays for installation on standard mounting rails

The use of SIRIUS 3RP20 timing relays is recommended in particular wherever there is only minimal clearance between standard mounting rails and/or minimal mounting depth, e.g. in switchboxes, due to their reduced height and mounting depth.


Installation design

Narrow timing relays for standard rail mounting in control cabinets and distribution boards

The SIRIUS 7PV15 timing relays in 17.5 mm enclosure are suitable for all standard applications and comply with the EMC requirements for residential applications. The changeover delay for star/delta (wye/delta) is adjustable from 50 ms to 1 s to ensure optimum adaptation to the respective application.

Function modules

For mounting onto contactors

3RA28 function modules for the assembly of starters and contactor assemblies for direct-on-line and star-delta (wye-delta) starting

The function modules include the key control functions required for the particular feeder, e.g. timing and electrical interlocking function, and act like a timing relay. They can be fitted quickly and easily directly onto the 3RT2 contactors and enable both ON-delay and OFF-delay switching of contactors.

Time-delay auxiliary switches

For mounting onto contactors

Solid-state time-delay 3RA28 auxiliary switches for contactor coil voltages

The solid-state time-delay auxiliary switches are designed for contactor coil voltages within the range of 24 to 240 V AC/DC (wide voltage range). Auxiliary switches for control and alarm signals are used specially for switching the smallest signals for electronics applications.

They are used to allow run-on of a pump or a fan, for example, similar to an OFF-delay timing relay or for delayed activation of a gate drive. Both the electrical and mechanical connection are made by simple snapping on and locking.

A varistor is integrated in the time-delay auxiliary switch to attenuate contactor coil switching overvoltages.

Highlights at a glance

Simulator timing relays SIRIUS 3RP25

With the new simulator for the SIRIUS 3RP25 timing relays, the sequence of different timing functions can be visualized and a variety of fault cases can be simulated. Test it right here with one click.

SIRIUS 3RP25: The compact, multifunctional timing relay

Our SIRIUS 3RP25 timing relay is a reliable multi-talent in a state-of-the-art design. This will be far more than just a little helper for your applications. And we can show you why.

Downloads, Tools and Support for SIRIUS timing relays

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