Timeguard 24hr / 7 day Compact Electronic Immersion Time Switch - NTT03 has a rating of 4.8 stars based on 22 reviews.

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Timeguard 24hr / 7 day Compact Electronic Immersion Time Switch - NTT03

Quick Find Code: NTT03

3 Year Warranty

Free Next Day Delivery on orders over £50*

for Next Working Day Delivery

Up to 28 ON/OFF programmes per week for fully customised scheduling
1-minute precision control for efficient energy management
Convenient 1–2 hour boost mode and auto summer/winter time adjustment
Large Easy View backlit display with clear LED indicators
16A high-capacity relay, ideal for immersion heaters and resistive loads

Timeguard 24hr / 7 day Compact Electronic Immersion Time Switch - NTT03

Quick Find Code: NTT03

3 Year Warranty

Free Next Day Delivery on orders over £50*

for Next Working Day Delivery

Up to 28 ON/OFF programmes per week for fully customised scheduling
1-minute precision control for efficient energy management
Convenient 1–2 hour boost mode and auto summer/winter time adjustment
Large Easy View backlit display with clear LED indicators
16A high-capacity relay, ideal for immersion heaters and resistive loads

Regular price ~~£42.98~~
£28.65 (inc. VAT)

Regular price ~~£35.82~~
£23.88 (ex. VAT)

You save: £14.33

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Product

Status

Price

Qty

Timeguard 24hr / 7 day Compact Electronic Immersion Time Switch - NTT03

NTT03Current Product

In Stock

£28.65

(inc. VAT)

Attribute Value

Timeguard 24hr Compact Immersion Time Switch - NTT01

NTT01

In Stock

£17.95

(inc. VAT)

Attribute Value

Timeguard 24hr Compact General Purpose Timeswitch With Volt Free Contacts - NTT02

NTT02

In Stock

£19.95

(inc. VAT)

Attribute Value

Timeguard 7 day Slimline General Purpose / Immersion Timeswitch - NTT07

NTT07

In Stock

£31.79

(inc. VAT)

Attribute Value

Timeguard 7 day Slimline Electronic Immersion Time Switch - NTT08

NTT08

In Stock

£28.85

(inc. VAT)

Attribute Value

Add To Cart

Information & Specification
Delivery Information

Product Overview

Timeguard 24 Hour/7 Day Compact Electronic Immersion Heater Timeswitch - NTT03

The Timeguard NTT03 Compact Electronic Immersion Timer is a reliable, energy-saving solution for controlling immersion heaters and other electrical appliances with precision. Operating on a 230V AC / 50Hz supply, it allows up to 4 ON and 4 OFF periods per day, giving users the flexibility to schedule heating exactly when needed. Across the week, this adds up to 28 ON and OFF operations, ensuring that energy is never wasted heating water unnecessarily. With its 1-minute switching interval, the NTT03 delivers pinpoint control for maximum efficiency.

A clear Easy View backlit screen displays the current status, complemented by mains and output indicator LEDs for instant feedback. The user-friendly interface includes large push-buttons for quick setup and a self-cancelling override function that lets you temporarily skip to the next programme. For added convenience, the 1- or 2-hour boost mode provides instant extra heating when needed, while automatic summer/winter time changeover ensures the schedule stays accurate year-round.

Compact and durable, the NTT03 can be flush or surface mounted with a minimum back box depth of 32mm, making it suitable for a wide range of installations. Built to Class II double insulation standards, it offers long-term reliability and safe operation in temperatures between 0°C and 40°C. Rated at 16A (3.68kW resistive load), this timer is ideal for immersion heaters, lighting, and other household applications.

Downloads

Download ntt03-4-instructions

Specification

24 Hour Digital Clock	Yes
Battery Backup	Yes
Battery Rechargeable	Yes
Estimated Battery Life	720 h
Gang	1
MPN	NTT03
Old GTIN	5012483012314
Operating Temperature Maximum	40 °C
Operating Temperature Minimum	-20 °C
Shortest Switching Time	1 min
Thermostat	Yes
Timer Mode	24 Hour/7 Day
Voltage	230 V
Depth	60 mm
Height	92 mm
Width	92 mm

We always aim to dispatch your order for delivery on the next working day. Simply place your order before the same-day dispatch cut-off time. The countdown timer on the product page shows this cut-off time. While we work with trusted couriers, delivery times cannot be guaranteed.

Free UK Delivery on All Qualifying Orders Over £50. Orders under £50 will incur a £5.90 Delivery Fee.

This Excludes Delivery to the Scottish Highlands, Offshore Islands and Northern Ireland. These will be charged at an extra rate, which will be calculated at the checkout.

Heavier Items may also incur an extra fee.

Compare the range

24 hour digital clock

Battery backup

Battery rechargeable

Gang

Mpn

NTT03

Old gtin

5012483012314

Operating temperature maximum

40 °C

Operating temperature minimum

-20 °C

Shortest switching time

1 min

Timer mode

24 Hour/7 Day

Voltage

230 V

Applicable area

Child lock

Current

Digital controls

Finish or colour

Ip rating

Material

Mounting

Smart home compatible

Wired

Domestic or commercial

Estimated battery life

720 h

NTT01

£17.95

NTT01

05012483012291

40 °C

-20 °C

15 min

24 Hour

230 V

NTT02

£19.95

NTT02

50 °C

-10 °C

24 Hour

230 V

NTT07

£31.79

NTT07

40 °C

0 °C

230 V

Home,Office

White

IP20

Polycarbonate

Surface

NTT08

£28.85

NTT08

05012483012369

40 °C

0 °C

1 min

7 Day

230 V

Home

White

Plastic

Domestic

720 h

Timeguard 24hr / 7 day Compact Electronic Immersion Time Switch - NTT03

Information & Specification