The Siemens 3RP1525-1BW308K is an on-delay electronic timer from the Siemens 3RP series, designed for industrial automation, machine-control panels and electrical control systems. It features 1 C/O changeover contact, allowing flexible integration into relay, contactor and control circuits.
The on-delay function is useful when an output must change state only after a predefined time following application of the control signal.
The 3RP1525-1BW308K belongs to the Siemens 3RP family of electronic timing relays used for controlled time delays in industrial electrical systems.
Electronic timers can help coordinate the operation of:
This makes the timer suitable for both conventional control panels and automated industrial systems.
The primary function of the 3RP1525-1BW308K is on-delay timing.
With an on-delay timer, the timing period begins when the control signal is applied. The output contact changes to its operated state after the preset time has elapsed.
A simplified sequence is:
Control Signal ON → Time Delay → Output Operates
This type of timing is useful where one machine operation needs to start only after another condition has remained active for a defined period.
Typical applications include:
The 3RP1525-1BW308K is specified with 1 C/O contact, also known as a changeover contact.
A changeover contact provides a common connection with normally open and normally closed contact paths, giving the timer flexibility in different control circuits.
It can be used for:
The connected load should always remain within the applicable contact ratings.
The 3RP1525-1BW308K can be used wherever a controlled time delay is required in an industrial control sequence.
Typical applications include:
The timer can introduce a delay before energizing a motor contactor or another control device.
It can coordinate the starting of different conveyor sections or machine stages.
The timer can provide delayed activation or coordination with another control event.
It can be used to introduce a controlled delay before activating ventilation equipment.
The timer can coordinate different stages of an automated machine sequence.
It can provide timing between process steps or controlled equipment operations.
The 3RP1525-1BW308K can be incorporated into control systems containing:
Its changeover contact provides flexibility for connecting the timer to different control and signalling circuits.
The 3RP1525-1BW308K is suitable for OEM machine manufacturers, electrical panel builders, automation integrators and industrial maintenance professionals.
Its combination of on-delay timing and 1 C/O contact makes it useful for standard machine-control and industrial automation applications.
The Siemens 3RP1525-1BW308K provides a practical on-delay timing solution for industrial control and automation applications.
Its 1 C/O changeover contact allows flexible integration into different electrical control arrangements, while the on-delay function helps coordinate equipment that needs to operate after a defined time interval.
For OEMs, panel builders and automation integrators, it is suitable for delayed motor starting, conveyor sequencing, machine automation, process timing and auxiliary control applications.
SB Smart supplies Siemens industrial electrical and automation products across Faridabad, Gurgaon/Gurugram, Delhi NCR, Haryana, Noida, Punjab, Mumbai and all major cities across India.
Major delivery locations include:
It is a Siemens 3RP on-delay electronic timer with 1 C/O changeover contact.
On-delay means the timer waits for the configured time after the control signal is applied before changing the output to its operated state.
It has 1 C/O changeover contact.
C/O means changeover contact, providing a common connection with normally open and normally closed contact paths.
It can be used in motor-control panels, pumps, fans, conveyors, production machinery, packaging systems and process-control applications.
Common uses include delayed motor starting, conveyor sequencing, pump control, fan control, machine sequencing and process timing.
Yes. Its changeover contact can be incorporated into a suitable contactor-control circuit, provided the electrical ratings are compatible.
Yes. It can be integrated into suitable PLC, relay and contactor control architectures.
Yes. It is suitable for OEMs, electrical panel builders, automation integrators and industrial maintenance applications.
You can explore the Siemens product range at SB Smart for Siemens electronic timers, contactors, relays and other industrial automation products.
| Specification | Details |
|---|---|
| Product Name | Electronic On-Delay Timer Relay |
| Manufacturer | Siemens |
| Series | SIRIUS 3RP |
| Model Number | 3RP1525-1BW308K |
| SKU | 3RP1525-1BW308K |
| Product Type | On-Delay Timer |
| Timing Function | On-Delay |
| Contact Configuration | 2 Changeover Contacts (2 C/O) |
| Time Range | 0.05 Seconds to 100 Hours |
| Number of Time Ranges | 15 Selectable Ranges |
| Control Supply Voltage | 24–240V AC/DC |
| Frequency | 50/60 Hz |
| Voltage Type | AC/DC Universal |
| Repeat Accuracy | ±1% |
| Setting Accuracy | ±5% |
| Mounting Type | 35 mm DIN Rail Mounting |
| Housing Width | 22.5 mm |
| Terminal Type | Screw Terminals |
| Status Indication | Dual LED Indicators |
| Protection Rating | IP20 |
| Thermal Current | 5 A |
| Contact Material | AgSnO₂ (Silver Tin Oxide) |
| Mechanical Endurance | Up to 10 Million Operations |
| Application | Industrial Timing & Automation Control |
| Product Family | Siemens SIRIUS Timing Relays |
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