steve
Got hold of Sime for a Carrier card for…
Got hold of Sime for a Carrier card for a chiller. Machine down in a factory. Received the new card in express time machine and plant now up and running fantastic service form Sime
3 weeks ago
7LF4401-5
Siemens 7LF4401-5 available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
Siemens 7LF4401-5 is a SENTRON digital time switch (Mini series) designed for DIN-rail mounting, providing reliable time-based control of electrical loads in control panels. It features one channel with a potential-free changeover (CO) contact rated up to 16 A at 250 V AC, making it suitable for switching lighting, pumps, ventilation and other scheduled circuits. The unit operates on AC supply voltage across a wide range (93.5 to 264 V AC, 50 Hz) and offers clear on-device text guidance with direct manual operation and switching preselection. Programming options include 24-hour, weekly and 60-minute time programmes with 28 memory slots, 1-second minimum switching interval and an accuracy of approximately 0.3 seconds per day. Compact at 18 mm wide (83 mm high, 64 mm deep) with IP20 protection, it is built for panel environments with an operating temperature range of -10 °C to +55 °C.
| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Part Number | 7LF4401-5 |
| Alternative Part Number | 7LF44015 |
| Product Range / Brand | SENTRON |
| Product Type | Digital time switch (Mini) / time-delay switch |
| Channel Count | 1 channel |
| Switching Function | CO (changeover) contact |
| Contact Type | Potential-free (floating) switching contact |
| External Switch Input | No |
| Supply Voltage Type | AC |
| Supply Voltage Range | 93.5 to 264 V AC (rated control/supply range) |
| Mains Frequency | 50 Hz |
| Switching Capacity | 16 A at 250 V AC (rated) |
| Power Loss | 0.035 W per pole (at rated current, AC, hot operating state) |
| Time Accuracy | 0.3 s per day |
| Minimum Switching Interval | 1 s (channel 1) |
| Memory Slots | 28 |
| Time Programmes | 24-hour programme; weekly programme; 60-minute programme |
| Operating Functions | Direct operation; switching preselection; text guidance in display |
| Functions Not Included | Astro programme; random programme; cyclical programme; annual programme; impulse programme; holiday programme; automatic daylight-saving adjustment; operating hours counter |
| Synchronisation / Control | Not radio-controlled; not line-synchronous; not quartz-controlled |
| Mounting Type | DIN rail |
| Module Width | 1 TE (1 pitch / width unit) |
| Dimensions (H × W × D) | 83 mm × 18 mm × 64 mm |
| IP Rating | IP20 |
| Overvoltage Category | Category III (IEC 61010-1) |
| Ambient Operating Temperature | -10 °C to +55 °C |
| Storage Temperature | -20 °C to +60 °C |
| Terminal / Connection | 1 terminal with cross-head screw |
| Conductor Size (Rigid) | 1.5 to 4 mm² |
| Conductor Size (Flexible, with ferrule) | Up to 2.5 mm² |
| Part Description | Siemens 7LF4401-5 SENTRON digital time switch Mini for DIN-rail mounting, featuring a single-channel weekly/24-hour schedule with a 1-second minimum switching interval and 28 memory slots. It provides a potential-free changeover (CO) contact rated up to 16 A at 250 V AC and operates across a wide AC supply range, offering clear on-device text-guided operation in a compact 1 TE format. |
What does this digital time switch do?
It is a DIN-rail mounted digital time switch used to automatically control an electrical load on a time schedule, with options for 24-hour and weekly switching programmes as well as a 60-minute time programme.
What supply voltage range does it accept?
It operates on AC supply and is suitable for a wide mains range of 93.5 to 264 V AC (commonly used on 120–230 V AC systems).
How many channels does it have?
It has 1 switching channel, intended to control one circuit according to the configured schedule.
What type of output contact does it use?
It uses a changeover (CO) contact, providing a potential-free (floating) switching contact for flexible control wiring.
What is the maximum switching capacity?
The rated switching capacity is 16 A at 250 V AC.
What is the smallest programmable switching interval?
The shortest switching time interval is 1 second, allowing fine-grained on/off events where needed.
How accurate is the timing?
The specified accuracy is approximately 0.3 seconds per day.
How many switching events can be stored?
It provides 28 memory slots for storing switching times, depending on how you structure your schedule.
Does it support weekly schedules?
Yes. It supports a weekly time programme, enabling different on/off times across the days of the week.
Can it be used as a 24-hour repeating timer?
Yes. It supports a 24-hour time programme for repeating daily schedules.
Does it have an astro or random programme?
No. Astro and random time programmes are not provided on this model (for example, Siemens 7LF4401-5 does not include these functions).
Is automatic daylight-saving time adjustment included?
No. Automatic daylight-saving adjustment is not included, so seasonal time changes need to be applied manually if required.
Can I override the schedule manually?
Yes. Direct operation is available, allowing you to switch the output without changing the stored programme.
Does it accept an external switch input?
No. This model does not include an external switch input.
How is it mounted in a control panel?
It is designed for DIN rail mounting and occupies 1 width unit (18 mm).
What are the physical dimensions?
Approximate dimensions are 83 mm (height) × 18 mm (width) × 64 mm (depth).
What is the IP rating and typical installation environment?
It is rated IP20, intended for use inside an enclosure where it is protected from direct contact and ingress of water.
What ambient temperature range is it designed for?
Permissible ambient temperature is -10 °C to +55 °C during operation, with storage from -20 °C to +60 °C.
What conductor sizes can be connected?
For the main circuit it supports rigid conductors from 1.5 mm² to 4 mm², and flexible conductors (with end processing) up to 2.5 mm².
- Automating indoor lighting circuits on a weekly schedule (offices, corridors, plant rooms)
- Time-based control of shopfront and display lighting to match opening hours
- Switching illuminated signage and advertising lightboxes at set times
- Scheduled operation of ventilation fans and extract systems in commercial spaces
- Controlling electric heaters or panel heaters during occupied periods to reduce energy use
- Running circulation pumps for heating or hot-water systems at programmed times
- Timed control of small motors and auxiliaries on control panels (e.g., blowers, fans, actuators via a contactor)
- Managing defrost or purge routines by switching a circuit for defined time windows
- Coordinating building services loads to avoid unnecessary out-of-hours operation
- Driving a contactor or relay coil with a programmable weekly timer for higher-load applications
- Controlling fountains, features, or indoor water displays on a weekly timetable
- Automating periodic equipment run-times for process support tasks in light industrial environments
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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Customer reviews
steve
Daniel
Excellent customer service...
Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
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Jerry Schrink
Tom Higgins provided amazing service
Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!
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Paulo Pereira
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Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!
2 months ago
Gary
Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
3 months ago
Lessle Smith
Thomas Higgins has gone above and…
Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
4 months ago
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