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The SUL181H mechanical timer boasts a versatile, segment-based programming system, facilitating swift comprehension and seamless interchangeability. Its most condensed switching interval lasts a mere half-hour while providing the flexibility of uninterrupted on/auto/off cycling.

  • 1 Channel,48 Switching segments
  • Fine-tuning of time settings to the minute
  • Simple daylight savings/winter time correction
  • Toggle preselection,quartz control
  • Switch status display,Permanent on/off switch
  • Continuous on/auto/off manual switching

Stable Delvery Time

Technical Support

2 Years

MOREDAY SUL181h Analog Mechanical Weekly Time Switch

MOREDAY SUL181h Mechanical Timer Switch

The SUL181h Analog Mechanical Weekly Time Switch is a highly efficient and reliable mechanical time switch designed for various applications, including lighting control, heating, ventilation, and air conditioning systems.Elevate the efficiency and precision of your operations with the SUL181h Mechanical Timer Switch from MOREDAY, designed for a wide range of applications. Here’s why choosing Moreday for this robust timer switch makes all the difference in your projects.

Key Features

Analog Mechanical Weekly Time Switch Versatility

The SUL181h is perfect for controlling lighting, HVAC systems, pumps, fans, and much more​.

Ease of Use

Program your switch with simple segment flipping, offering settings like continuous ON, AUTO, and OFF. The shortest switching segment is 30 minutes, allowing for tailored scheduling throughout the day.


With quartz control and fine adjustment capabilities, time setting is accurate to the minute. This feature ensures your operations align perfectly with your scheduling needs.


Equipped with a NiMH rechargeable battery for power reserve, ensuring continuous operation even during power interruptions​ .

Safety and Compliance

The SUL181h Analog Mechanical Weekly Time Switch is housed in a robust enclosure with an IP20 rating, guaranteeing protection against solid objects and making it suitable for a variety of industrial environments. It also meets CE and other critical safety standards.

Applicable Scenarios


Ideal for billboard and showcase lighting, commercial refrigeration, and air-conditioning systems.


Enhances operations in wastewater treatment, hydroponic systems, and generator exercising.

Residential and Public Spaces

Perfect for pool and spa management as well as boiler and heater control​​.

Why Choose Moreday?

Expertise and Trust

As a top supplier, Moreday brings expertise and a proven track record of delivering high-quality, certified products that meet rigorous industrial standards.

Customer-Centric Solutions

We understand the importance of timely deliveries and are committed to ensuring each project meets its schedule with efficiency and precision.




Operation Voltage


Contact Capacity




Full Timing Range


Power Reserve


Working Reserve Time

24hours charged can lasts 150 hours

Minimum Setting Unit


Time Accuracy


Operation Temperature

-20°C- +55°C

Installing Mode


Degree of protection


popular questions


1. How do I program the SUL181h timer switch?

To program the SUL181h timer, locate the current time on the dial and rotate it until the arrow aligns with the correct time. Then, insert pins into the slots corresponding to the desired ON times. For OFF times, simply leave those slots empty. This allows for custom programming tailored to your needs.

2. What types of devices can I control with the SUL181h?

The SUL181h is highly versatile and can be used to control a wide range of devices including lights, HVAC systems, commercial refrigeration, pumps, motors, and fans. Its robust design is suited for both residential and industrial applications.

3. Can the SUL181h be used outdoors?

While the SUL181h is robust, it has an IP20 rating, which means it is protected against solid objects larger than 12mm but not water-resistant. For outdoor applications, a protective enclosure is recommended to shield it from weather elements.

4. What is the power reserve feature of the SUL181h?

The SUL181h features a power reserve maintained by a NiMH rechargeable battery. This ensures that the timer can keep running for up to 7 days without external power, preserving your settings during short power outages​.

5. How do I manually override the programmed settings?

The SUL181h includes a manual override switch that allows you to toggle between continuous ON, AUTO, and continuous OFF modes, giving you flexibility to adjust operation without altering the programmed settings.

6. What should I do if my timer switch is not working correctly?

First, verify that the timer is correctly programmed and that the power supply is stable and within the specified range. Check the installation and ensure that all connections are secure. If problems persist, consult the troubleshooting section of the user manual or contact MOREDAY’s support team for assistance​.

7. Is the SUL181h timer switch easy to install?

Yes, the SUL181h is designed for easy installation on a DIN rail, which is a standard type of rail used for mounting circuit breakers and industrial control equipment inside equipment racks. This makes it straightforward to integrate into existing setups.

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