The Siemens 3RP1533-1AQ308K is an off-delay electronic timer from the Siemens 3RP series, designed for industrial automation, machine-control panels and electrical control systems. It provides a 5–100 second adjustable time range and 1 changeover contact (1 C/O) for controlling electrical loads and sequences after a control signal is switched off. Siemens product information identifies this model as an off-delay timer with 1 C/O contact.
The 3RP1533-1AQ308K belongs to the Siemens 3RP family of electronic timing relays used to introduce controlled time delays into industrial control circuits.
Electronic timers can coordinate the operation of contactors, relays, motors, valves, pumps and other equipment where a defined delay is required.
Typical applications include:
Industrial automation
Machine-control panels
Motor-control systems
Conveyor systems
Pump-control applications
Production machinery
Packaging equipment
Process automation
Auxiliary control circuits
OEM machinery
The key function of the 3RP1533-1AQ308K is off-delay timing.
With an off-delay timer, the output contact remains in its energized operating state for the configured period after the initiating control signal is removed. Once the preset time expires, the output changes back to its normal state.
A simplified sequence is:
Control Signal ON → Output Operates → Control Signal OFF → Time Delay → Output Returns
This makes the timer useful where equipment needs to remain active for a defined period after a control signal has been switched off.
Typical applications include:
Delayed motor shutdown
Fan run-on control
Pump run-on timing
Valve control
Conveyor sequencing
Cooling-cycle control
Delayed auxiliary switching
Machine sequence control
The 3RP1533-1AQ308K provides an adjustable timing range of 5 to 100 seconds.
This allows the timer to be configured for different off-delay requirements within its specified range.
The appropriate setting should be selected according to the machine sequence, process requirements and connected equipment.
The product 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 flexibility when integrating the timer into control circuits.
It can be used for:
Contactor control
Relay logic
PLC inputs
Auxiliary switching
Interlocking
Status signalling
Sequence control
The contact ratings should be verified against the manufacturer's documentation and the connected load.
The 3RP1533-1AQ308K is specified for 24 V AC, 100–127 V AC and 24 V DC control supply configurations. Siemens product data lists the control voltage as AC/DC with 50/60 Hz AC operation.
This makes it suitable for control systems using compatible low-voltage AC or DC supplies.
Always verify the actual control supply against the product marking before installation.
The 3RP1533-1AQ308K can be used in industrial applications where a controlled delay is required after a control signal is removed.
Typical applications include:
Motor-control systems
Pump systems
Fan and blower systems
Conveyor systems
Packaging machines
Production machinery
Process-control equipment
Material-handling systems
Machine-control panels
OEM automation systems
The 3RP1533-1AQ308K is suitable for OEM machine manufacturers, electrical panel builders, automation integrators and industrial maintenance professionals.
Its combination of off-delay operation, 5–100 second adjustment range and 1 C/O changeover contact provides flexibility for conventional industrial control circuits.
Siemens 3RP electronic timer
Article number 3RP1533-1AQ308K
Off-delay timing function
1 C/O changeover contact
5–100 second adjustable time range
AC/DC control supply
24 V AC
100–127 V AC
24 V DC
Suitable for industrial automation
Suitable for machine-control panels
Suitable for relay and contactor control
Suitable for OEM machinery
Suitable for process timing applications
Off-delay control: Keeps the output active for the required delay after the initiating signal is removed.
5–100 second range: Provides flexibility for different machine and process requirements.
1 C/O contact: Offers versatile switching options for control circuits.
AC/DC compatibility: Supports specified AC and DC control supplies.
Easy control integration: Suitable for contactors, relays, PLC inputs and auxiliary circuits.
Sequence control: Helps coordinate delayed shutdown and run-on functions.
OEM-friendly: Suitable for standardized machine-control designs.
The Siemens 3RP1533-1AQ308K provides a practical off-delay timing solution for industrial automation and machine-control applications.
Its 5–100 second adjustable timing range and 1 C/O changeover contact make it suitable for delayed shutdown, fan run-on, pump timing, conveyor sequencing and other applications where equipment needs to remain active for a defined period after a control signal is removed.
For OEMs, panel builders and automation integrators, it can be incorporated into conventional relay and contactor-based control systems.
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:
Faridabad
Gurgaon/Gurugram
Delhi
Delhi NCR
Noida
Greater Noida
Haryana
Punjab
Mumbai
Pune
Ahmedabad
Bengaluru
Hyderabad
Chennai
Kolkata
Jaipur
Chandigarh
Lucknow
Indore
Surat
Vadodara
Nagpur
Coimbatore
And other major cities across India
It is a Siemens 3RP off-delay electronic timer with 1 C/O changeover contact.
The specified adjustable timing range is 5–100 seconds.
Off-delay means the output remains operated for the configured time after the initiating control signal is switched off, then returns to its normal state.
It has 1 C/O changeover contact.
This model is specified for 24 V AC, 100–127 V AC and 24 V DC control supply configurations.
It can be used in motor-control panels, pumps, fans, conveyors, production machinery, packaging equipment and process-control systems.
Common applications include delayed motor shutdown, fan run-on, pump run-on, cooling cycles and delayed auxiliary switching.
Yes. Its changeover contact can be incorporated into a suitable contactor-control circuit, provided the electrical ratings are compatible.
Yes. The timer can be integrated into suitable PLC, relay and contactor control architectures.
You can explore the Siemens product range at SB Smart for Siemens electronic timers, contactors, relays and other industrial automation products.
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| Specification | Details |
|---|---|
| Product Name | Electronic Off-Delay Timer Relay |
| Manufacturer | Siemens |
| Series | SIRIUS 3RP |
| Model Number | 3RP1533-1AQ308K |
| SKU | 3RP1533-1AQ308K |
| Product Type | Off-Delay Timer |
| Timing Function | Off-Delay |
| Contact Configuration | 1 Changeover Contact (1 C/O) |
| Time Range | 5 – 100 Seconds |
| Control Supply Voltage | 24V AC / 100–127V AC / 24V DC |
| Voltage Type | AC/DC |
| Technology | Solid-State Electronic Timer |
| Repeat Accuracy | < ±1% |
| Setting Accuracy | < ±5% |
| Mounting Type | 35 mm DIN Rail Mounting |
| Housing Width | 22.5 mm |
| Terminal Type | Screw Terminals |
| Status Indication | LED Indicators |
| Protection Rating | IP20 |
| Operating Temperature | -25°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Mechanical Endurance | Up to 30 Million Operations |
| Contact Material | AgSnO₂ (Silver Tin Oxide) |
| Application | Industrial Timing & Delay Control |
| Product Family | Siemens SIRIUS Timing Relays |
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