Clever Little Box TU8A (Danfoss 841/842 Replacement) 8-Channel Digital Timer Unit

£247.00 EX VAT


The Clever Little Box TU-8A is an eight-channel Digital Timer Unit, and can be used as a ‘direct replacement for the Danfoss 841 and Danfoss 842 timer units’ or the ‘Randall 841 or Randall 842′ (as they were originally branded). The TU8A offers straightforward accessibility, and can be easily programmed for virtually any time switch application.

Features a sleek yet modern design; ideal for educational applications where the scheduled broadcast of tones, messages, alarms or recorded audio files/tracks is required on an ongoing basis. In addition to this being an ideal timer for schools, colleges, and other educational facilities, it is also a great device for timed switching of bells, sounders, and other devices in industrial and commercial applications.

The TU8A is a truly versatile solution which can even be used to control domestic devices, such as zoned under floor heating! This Timer Unit has been designed to provide programmed weekly event switching of 8 independent relay outputs – easily matching the Danfoss 841 and 842 channel capacity, and provides NO (Normal Open) or NC (Normal Closed) relay contacts to each of its 8 Relay Outputs, with 10A capability at UK mains voltages or up to 24V DC applications.

Product Features:

  • Clear blue LCD display screen
  • Event manual override facility
  • 7-day week event Switching Timer
  • Easy access Phoenix Connectors per Relay output and Power connectivity
  • Onboard memory maintains time & program settings – approx. 7 days in event of power loss



Output Channels


Events per Day

64 (32 on/off)


7-day week

Relay Rating

12A @ 120V AC
10A @ 240V AC, or 24V DC

Case Material

Powder-coated steel


12V DC (Mains Plugtop PSU supplied)

Power Out Memory

Up to 7 days memory storage of Time/Program settings


140 mm W x 110 mm H x 25 mm D


Net = 0.52 kg
Shipping = 0.90 kg

Accessories (Included)


Accessories (Optional)


Partnered Products

To view the TU-8A’s partnered product, click here

*If you’re looking for more options, why not visit our sister company: North East Time Recorders Limited – whereby you can order a wider range of Break Timers and Sounders.*

Pulsing Units:

TU-8A Pulsing Units can also be bought alongside this product. These units perfectly replicate the pulsing that Danfoss 841 and 842 provides, but will need a certified electrician to fit and/or install them. If you require further assistance or information, please feel free to contact us via 0191 414 4241, or simply send us an email at

To view additional information, be sure to check out the Data Sheets below.

Data Sheets

Data Sheet

Additional information


Clever Little Box


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