The Siemens 3RP1505-1AW308K is a multifunction electronic timer from the Siemens 3RP series, designed for industrial automation, machine-control panels and electrical control systems. It provides 1 C/O changeover contact, supports 8 timing functions, and offers 15 selectable time ranges from 0.05 seconds to 100 hours. The timer also supports 24–240 V AC/DC control input, making it suitable for a wide variety of industrial control applications.
The 3RP1505-1AW308K belongs to the Siemens 3RP electronic timer family, designed for flexible time-control functions in industrial electrical and automation systems.
Unlike a dedicated on-delay or off-delay timer, this multifunction model can be configured for different timing requirements using a single device.
Typical applications include:
Industrial automation
Machine-control panels
Motor-control systems
Conveyor systems
Pump-control applications
Fan and ventilation control
Production machinery
Packaging equipment
Process automation
OEM machinery
The multifunction capability of the 3RP1505-1AW308K allows it to support multiple timing functions within one timer.
The available functions include:
On-delay
Off-delay
On + off delay
Flashing operation
Pulse make contact
Pulse break contact
Pulse shaping
Additive ON delay
This flexibility makes the timer useful when different machines or control circuits require different timing sequences.
The 3RP1505-1AW308K provides a broad timing range from 0.05 seconds to 100 hours, with 15 selectable time-setting ranges. This allows the same timer to be used for very short switching delays as well as longer industrial process sequences.
This broad range can be useful for:
Fast machine-control sequences
Contactor switching delays
Motor-control timing
Conveyor coordination
Pump sequencing
Fan run-on functions
Process delays
Long-duration machine operations
The timer is specified with 1 C/O changeover contact.
A changeover contact provides a common connection along with normally open and normally closed paths, allowing flexible integration into different control circuits.
It can be used for:
Contactor control
Relay logic
PLC inputs
Interlocking
Status signalling
Sequence control
Auxiliary switching
Control-system feedback
The connected load should always remain within the applicable contact ratings.
The 3RP1505-1AW308K supports a wide 24–240 V AC/DC input range, providing flexibility for different control-panel architectures. Available product information specifies AC operation at 50–60 Hz and DC input across the same 24–240 V range.
This can reduce the need to select different timer variants for different control-supply voltages.
The timer includes LED indication, providing visual feedback of the device's operating condition.
This can be useful during:
Commissioning
Troubleshooting
Maintenance
Control-panel inspection
Machine servicing
The visual indication helps technicians quickly identify timer activity within an electrical control panel.
The 3RP1505-1AW308K uses screw connections, providing a familiar wiring method for industrial control-panel builders and maintenance teams.
This supports straightforward installation, commissioning and servicing when the device is wired according to the manufacturer's requirements.
The multifunction design allows the 3RP1505-1AW308K to be used across a wide range of applications.
It can provide delayed or timed switching for motor contactors and auxiliary control devices.
Different timing functions can be used to coordinate conveyor motors and machine sections.
The timer can provide delayed starting, stopping or other timed pump-control functions.
It can support delayed activation, run-on and other timing requirements.
The timer can coordinate multiple stages of an automated machine sequence.
Its wide time range supports timing requirements ranging from short switching events to longer process operations.
The 3RP1505-1AW308K is suitable for OEM machine manufacturers, electrical panel builders, automation integrators and industrial maintenance professionals.
Its combination of 8 timing functions, 15 selectable time ranges, 1 C/O contact and 24–240 V AC/DC input makes it a flexible solution for standardized industrial control panels.
Siemens 3RP electronic timer
Article number 3RP1505-1AW308K
Multifunction timer
1 C/O changeover contact
8 timing functions
0.05 second to 100 hour timing range
15 selectable time ranges
24–240 V AC input
24–240 V DC input
LED indication
Screw connections
Suitable for industrial automation
Suitable for machine-control panels
Suitable for relay and contactor control
Suitable for OEM machinery
Multifunction operation: One timer supports multiple timing requirements.
Wide timing range: Covers applications from 0.05-second delays to 100-hour sequences.
15 time ranges: Allows precise selection according to the application.
1 C/O contact: Provides flexible switching options.
24–240 V AC/DC input: Supports a wide range of control supplies.
LED indication: Helps simplify commissioning and troubleshooting.
Screw connections: Provides a familiar industrial wiring method.
OEM-friendly: Helps standardize control-panel designs with one versatile timer.
The Siemens 3RP1505-1AW308K is a versatile timing solution for industrial automation because it combines 8 timing functions, 15 time-setting ranges, a 0.05-second to 100-hour range and 24–240 V AC/DC input in one device.
Its 1 C/O changeover contact, LED indication and screw connections make it suitable for motor-control circuits, machine sequencing, process timing and auxiliary switching applications.
For OEMs, panel builders and automation integrators, it can reduce the need for multiple dedicated timer types across different 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:
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Chennai
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And other major cities across India
It is a Siemens 3RP multifunction electronic timer with 1 C/O changeover contact.
The timer supports 8 timing functions, including on-delay, off-delay, on+off delay, flashing and pulse-related functions.
It provides a timing range of 0.05 seconds to 100 hours across 15 selectable time ranges.
It has 1 C/O changeover contact.
It supports 24–240 V AC/DC input.
Yes. The timer includes LED indication.
Yes. The product uses screw connections.
It can be used in motor-control panels, pumps, fans, conveyors, production machinery, packaging systems and process-control applications.
Yes. Its C/O contact can be incorporated into a suitable contactor-control circuit, provided the electrical ratings are compatible.
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 | Multi-Function Electronic Timer Relay |
| Manufacturer | Siemens |
| Brand | Siemens |
| Series | SIRIUS 3RP |
| Model Number | 3RP1505-1AW308K |
| SKU | 3RP1505-1AW308K |
| Product Type | Multi-Function Timer Relay |
| Contact Configuration | 1 Changeover Contact (1 C/O) |
| Number of Functions | 8 Timing Functions |
| 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 |
| Mounting Type | DIN Rail & Screw Mounting |
| DIN Rail Size | 35 mm Standard Rail |
| Housing Width | 22.5 mm |
| Terminal Type | Screw Terminals |
| Protection Rating | IP20 |
| Contact Material | AgSnO₂ (Silver Tin Oxide) |
| Operating Temperature | -25°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Functions Included | ON Delay, OFF Delay, ON+OFF Delay, Cyclic, Pulse, Break Contact, Pulse Shaping, Additive ON Delay |
| Application | Industrial Automation & Process Control |
| Product Family | Siemens SIRIUS Timing Relays |
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