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Sangamo Astro Zone 3 4-Pin Time Switch - 20A 2 On/Off

£23299
The RRP is the manufacturer's recommended retail price of the item.
152 In Stock - Ready to Ship
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Description

The Sangamo Astro Zone 3 is a 4-pin astronomical time switch with 24-hour programmable scheduling and two independent on/off operations per day. The switch adjusts switching times based on local sunrise and sunset, making it suited to outdoor lighting, security lighting, and heating controls where operation needs to follow natural daylight hours without manual seasonal adjustment.

Designed for installation in commercial, agricultural and residential electrical panels, the Astro Zone 3 fits a standard DIN rail mount and operates on 230V mains. The 20A current rating handles loads up to 4,600W, covering typical outdoor lighting circuits, underfloor heating zones, and signage. The 4-pin connector allows the programming dial to be removed once set, preventing accidental tampering in public or shared installations.

The switch carries a 100-hour battery reserve, maintaining the programmed schedule and clock through mains outages without losing settings. The clear dial face shows the current time, programmed on and off positions, and the astronomical offset zone (Zone 3 covers the UK and most of Western Europe). The switch calculates sunrise and sunset times internally based on the zone setting, shifting switching times across the year to match seasonal daylight variation.

Specification
Product Net Weight (KG) 0.433
Product Gross Weight (KG) 0.477
Outer Gross Weight (KG) 0.43
Product Length (mm) 104
Product Width (mm) 83
Product Height (mm) 134
Outer Length (mm) 104
Outer Width (mm) 83
Outer Height (mm) 134
Downloads

Product Specification Sheet

Product Manual

Frequently Asked

What does Zone 3 mean?

Zone 3 is Sangamo's astronomical zone covering the UK, Ireland, and most of Western Europe. The switch automatically calculates sunrise and sunset times for this latitude band and adjusts switching times across the year to follow natural daylight hours.

How many switching operations can be programmed?

The Astro Zone 3 provides two on/off operations per 24-hour period. These can be set to fixed clock times or offset from calculated sunrise/sunset, depending on the application.

What happens during a power cut?

The 100-hour battery reserve maintains the programmed schedule and clock through mains outages. Once power is restored, the switch continues operating from the correct time without needing to be reset.

What is the 4-pin connector for?

The 4-pin connector allows the programming dial to be removed after initial setup, preventing accidental adjustment in installations where public access or tampering is a concern. The switch continues operating with the dial removed.

Shipping & Returns

Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

To arrange a return, call us on 020 8149 5199 or use our contact page.

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Installation

Fits standard UK back boxes

Designed to fit standard UK back boxes for a straightforward swap of your existing fittings.

Ordering with us

Free delivery over £99

Free delivery on orders over £99, in the UK and worldwide. Easy returns within 14 days, subject to our returns policy. Full manufacturer warranty included.

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    Description

    The Sangamo Astro Zone 3 is a 4-pin astronomical time switch with 24-hour programmable scheduling and two independent on/off operations per day. The switch adjusts switching times based on local sunrise and sunset, making it suited to outdoor lighting, security lighting, and heating controls where operation needs to follow natural daylight hours without manual seasonal adjustment.

    Designed for installation in commercial, agricultural and residential electrical panels, the Astro Zone 3 fits a standard DIN rail mount and operates on 230V mains. The 20A current rating handles loads up to 4,600W, covering typical outdoor lighting circuits, underfloor heating zones, and signage. The 4-pin connector allows the programming dial to be removed once set, preventing accidental tampering in public or shared installations.

    The switch carries a 100-hour battery reserve, maintaining the programmed schedule and clock through mains outages without losing settings. The clear dial face shows the current time, programmed on and off positions, and the astronomical offset zone (Zone 3 covers the UK and most of Western Europe). The switch calculates sunrise and sunset times internally based on the zone setting, shifting switching times across the year to match seasonal daylight variation.

    Specification
    Product Net Weight (KG) 0.433
    Product Gross Weight (KG) 0.477
    Outer Gross Weight (KG) 0.43
    Product Length (mm) 104
    Product Width (mm) 83
    Product Height (mm) 134
    Outer Length (mm) 104
    Outer Width (mm) 83
    Outer Height (mm) 134
    Downloads

    Product Specification Sheet

    Product Manual

    Frequently Asked

    What does Zone 3 mean?

    Zone 3 is Sangamo's astronomical zone covering the UK, Ireland, and most of Western Europe. The switch automatically calculates sunrise and sunset times for this latitude band and adjusts switching times across the year to follow natural daylight hours.

    How many switching operations can be programmed?

    The Astro Zone 3 provides two on/off operations per 24-hour period. These can be set to fixed clock times or offset from calculated sunrise/sunset, depending on the application.

    What happens during a power cut?

    The 100-hour battery reserve maintains the programmed schedule and clock through mains outages. Once power is restored, the switch continues operating from the correct time without needing to be reset.

    What is the 4-pin connector for?

    The 4-pin connector allows the programming dial to be removed after initial setup, preventing accidental adjustment in installations where public access or tampering is a concern. The switch continues operating with the dial removed.

    Shipping & Returns

    Delivery UK delivery is £14.99, and delivery is free on all orders of £99 or more, in the UK and internationally.

    Returns If you change your mind, you have 14 days from delivery to tell us, and a further 14 days to send the goods back. Return postage for a change-of-mind return is paid by you. Change-of-mind returns are subject to an inspection and handling deduction. See our full returns policy.

    To arrange a return, call us on 020 8149 5199 or use our contact page.