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Sangamo E855 Digital 7 Day Time Switch - 20A 4 Pin Round Pattern

£26299
The RRP is the manufacturer's recommended retail price of the item.
200 In Stock - Ready to Ship
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Description

The Sangamo E855 is a programmable digital time switch in a 4-pin round pattern configuration, rated at 20A for switching immersion heaters, heating circuits, lighting banks and other timed loads. It offers 7-day programming with independent daily schedules, allowing up to 48 on and 48 off operations per day (96 total switching events), and includes automatic BST/GMT changeover for accurate timekeeping across clock changes.

Designed for residential immersion heater control, commercial lighting schedules, and industrial process timing, the E855 fits standard 4-pin round sockets in consumer units and distribution boards. The temporary override button allows manual switching without losing the stored programme, and the holiday mode suspends automatic operation when a property is unoccupied. The 20-day battery reserve maintains programme memory during mains interruptions.

The unit measures 104mm × 83mm × 134mm and weighs 380g, fitting within the space envelope of most consumer unit enclosures that accept 4-pin round-pattern timers. The digital interface replaces older mechanical segment timers, offering finer time resolution and independent day programming where mechanical alternatives use repeat patterns. The 20A rating handles resistive loads directly and can control larger loads via contactors.

Specification
Product Net Weight (KG) 0.38
Product Gross Weight (KG) 0.424
Outer Gross Weight (KG) 0.38
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 loads can the E855 switch?

The 20A rating handles resistive loads up to 4,600W on 230V mains, covering most domestic immersion heaters, storage heaters and lighting circuits. For inductive or motor loads the effective rating is lower and may require a contactor for safe switching.

How is the programme retained during power cuts?

The 20-day battery reserve maintains the programme and clock during mains interruptions. The battery charges automatically when mains power is present and does not require user replacement under normal operating conditions.

Can each day have a different schedule?

Yes. Each of the seven days can be programmed independently with its own on and off times, allowing weekend and weekday schedules to differ. This contrasts with older mechanical timers which repeat the same pattern daily.

What is holiday mode?

Holiday mode suspends automatic switching while retaining the stored programme. The timer remains off until holiday mode is deactivated, preventing unnecessary heating or lighting operation when a property is unoccupied for extended periods.

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.

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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 E855 is a programmable digital time switch in a 4-pin round pattern configuration, rated at 20A for switching immersion heaters, heating circuits, lighting banks and other timed loads. It offers 7-day programming with independent daily schedules, allowing up to 48 on and 48 off operations per day (96 total switching events), and includes automatic BST/GMT changeover for accurate timekeeping across clock changes.

    Designed for residential immersion heater control, commercial lighting schedules, and industrial process timing, the E855 fits standard 4-pin round sockets in consumer units and distribution boards. The temporary override button allows manual switching without losing the stored programme, and the holiday mode suspends automatic operation when a property is unoccupied. The 20-day battery reserve maintains programme memory during mains interruptions.

    The unit measures 104mm × 83mm × 134mm and weighs 380g, fitting within the space envelope of most consumer unit enclosures that accept 4-pin round-pattern timers. The digital interface replaces older mechanical segment timers, offering finer time resolution and independent day programming where mechanical alternatives use repeat patterns. The 20A rating handles resistive loads directly and can control larger loads via contactors.

    Specification
    Product Net Weight (KG) 0.38
    Product Gross Weight (KG) 0.424
    Outer Gross Weight (KG) 0.38
    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 loads can the E855 switch?

    The 20A rating handles resistive loads up to 4,600W on 230V mains, covering most domestic immersion heaters, storage heaters and lighting circuits. For inductive or motor loads the effective rating is lower and may require a contactor for safe switching.

    How is the programme retained during power cuts?

    The 20-day battery reserve maintains the programme and clock during mains interruptions. The battery charges automatically when mains power is present and does not require user replacement under normal operating conditions.

    Can each day have a different schedule?

    Yes. Each of the seven days can be programmed independently with its own on and off times, allowing weekend and weekday schedules to differ. This contrasts with older mechanical timers which repeat the same pattern daily.

    What is holiday mode?

    Holiday mode suspends automatic switching while retaining the stored programme. The timer remains off until holiday mode is deactivated, preventing unnecessary heating or lighting operation when a property is unoccupied for extended periods.

    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.