Siemens SIRIUS 3RP25 Timing Relays

Siemens SIRIUS 3RP25 Timing Relays Suppliers, Exporters in India

Siemens SIRIUS 3RP25 Timing Relays are used where an electrical operation needs to start, stop or change after a preset time. They are commonly installed in motor control panels, automation panels, machine control systems and industrial switchboards.

The 3RP25 range covers standard functions such as ON-delay, OFF-delay, pulse timing, clock-pulse operation and star-delta motor starting. Multifunction models are useful when the same panel requires different timing operations, as one relay can provide up to 27 selectable functions. Single-function models are also available for straightforward applications where only one timing sequence is required.

Depending on the selected model, the operating time can be adjusted from a fraction of a second up to 100 hours. This makes the series suitable for short machine sequences as well as longer processes, ventilation, pumping and control operations.

Siemens supplies the 3RP25 series in compact 17.5 mm and 22.5 mm housings. Buyers can select screw terminals or push-in terminals along with different output contacts and control supply voltages. Many models work across a wide voltage range, reducing the need to keep separate relays for every control voltage.

ARP IMPEX supplies and exports Siemens SIRIUS 3RP25 Timing Relays for panel builders, machine manufacturers, industrial plants, project contractors and maintenance requirements. Share the complete Siemens part number, required timing function, supply voltage and quantity for price and availability.

Technical Specifications

• Brand: Siemens
• Product range: SIRIUS
• Series: 3RP25
• Product type: Electronic timing relay
• Available types: Single-function and multifunction timing relays
• Common timing functions: ON-delay, OFF-delay, pulse function, clock-pulse function and star-delta timing
• Multifunction models: Up to 27 selectable timing functions
• Time-setting range: From approximately 0.05 seconds up to 100 hours, depending on the model
• Star-delta timing range: Model-dependent versions for motor starting applications
• Control supply options: AC, DC and AC/DC versions
• Wide-voltage models: Up to 12–240 V AC/DC, depending on the article number
• Output options: One or two changeover contacts, normally open contacts or semiconductor output, depending on the model
• Housing width: 17.5 mm or 22.5 mm
• Terminal options: Screw terminals or push-in spring terminals
• Mounting: DIN rail mounting
• Status indication: LED indication
• Contact options: Standard relay contacts and positively driven contacts on selected versions
• Applicable standards: EN 61812-1 and EN 60947-5-1
• Installation area: Industrial control cabinets, switchgear panels and machine control systems

The timing range, number of functions, output contacts and supply voltage differ from one 3RP25 article number to another. The full Siemens part number should be checked before confirming a replacement or placing an order.

Available Siemens 3RP25 Timing Relay Types

Multifunction Timing Relays

Multifunction 3RP25 relays are suitable for panels where several timing operations may be required. Depending on the model, one relay can provide 13 or 27 selectable functions.

These models help panel builders reduce the number of different timing relays kept in stock. They are also useful when the final timing sequence may need adjustment during machine commissioning.

ON-Delay Timing Relays

An ON-delay relay switches its output after the selected time has passed. These relays are commonly used for delayed motor starting, sequential machine operation, alarm delays and controlled switching of contactors.

OFF-Delay Timing Relays

An OFF-delay relay keeps the output active for a preset period after the control signal is removed. Typical uses include ventilation run-on, delayed shutdown, pump operation and controlled stopping sequences.

Siemens offers versions that work with a control signal as well as selected OFF-delay versions that can perform the timing operation without a separate control signal.

Clock-Pulse Timing Relays

Clock-pulse models repeatedly switch the output ON and OFF according to the selected timing cycle. They are used in flashing indicators, repetitive process cycles, lubrication systems and periodic machine operations.

Star-Delta Timing Relays

Star-delta 3RP25 relays control the changeover from star connection to delta connection during motor starting. They help coordinate the starting sequence without requiring a PLC for a basic star-delta starter arrangement.

Features

• Compact construction saves space inside control panels.
• Single-function and multifunction versions are available.
• Multifunction models cover up to 27 timing operations.
• Wide timing ranges suit both short and long control sequences.
• AC, DC and wide-range AC/DC supply options are available.
• Screw and push-in terminal versions suit different panel-wiring methods.
• LED indication helps check the operating and switching conditions.
• Adjustable front controls make setting the function and time straightforward.
• One or two changeover contact versions are available.
• Semiconductor-output models suit frequent switching applications.
• Selected models come with positively driven contacts.
• DIN rail mounting simplifies installation and replacement.
• Wide-voltage versions help reduce the number of relay variants required in stock.
• Separate models are available for star-delta starting and repetitive switching.
• The exact features depend on the selected 3RP25 model. Siemens offers different combinations of
• functions, timing ranges, contacts and terminal systems within the same series.

Applications

• Siemens SIRIUS 3RP25 Timing Relays are commonly used in:
• Motor control panels
• Star-delta motor starters
• Machine automation systems
• Sequential starting circuits
• Pump and compressor panels
• Conveyor control systems
• HVAC and ventilation panels
• Fan run-on circuits
• Delayed shutdown systems
• Packaging machinery
• Material-handling equipment
• Alarm and signalling circuits
• Lighting control systems
• Lubrication systems
• Process control panels
• Industrial ovens and heating systems
• Water-treatment equipment
• Production and assembly machinery

Siemens 3RP25 Timing Relay Supplier and Exporter

ARP IMPEX supplies Siemens SIRIUS 3RP25 Timing Relays for new panels, industrial projects, machine manufacturing and replacement requirements.

The 3RP25 series includes several article numbers with different timing functions, control voltages, time ranges and contact arrangements. Buyers replacing an existing relay should share the complete part number printed on the unit. Selecting only by the term “3RP25” may result in the wrong function or output configuration.