ThermoSphere Contractor Snubber For Underfloor

£103.90£190.53 Incl. VAT

Free delivery over £150 (Exceptions Apply)
Next Day Available | 30 Day Return Policy
Further Delivery Information


The ThermoSphere Contactor Snubber Unit is an accessory for large electric underfloor heating circuits over 16A/3600W that are run on a single ThermoSphere thermostat.

A single ThermoSphere thermostat is only rated for a maximum load of 16A/3600W, which roughly equates to 23m². So if a total load of your underfloor heating circuit exceeds 16A/3600W, and you want to control it from one thermostat, then you must install a suitably rated Contactor snubber.

The ThermoSphere Contactor Snubber is available in 3 different capacities:

  • 25 Amp = 5700w
  • 40 Amp = 9000w
  • 63 Amp = 144440w

Technical Data

  • Dimensions (mm): 180 x 110 x 82
  • Double insulated: Yes
  • Mounting: Surface mount
  • Protection rating: IP30

ThermoSphere Contractor Snubber Specification


Brand Thermosphere
Current Rating 25A/40A/63A
Packaging Types Each
Previously Known As 5279/5280/5286
Product Range Accessories
Unspsc 39121529
Weight 0.4kg (approx)

Snubber Datasheet

Datasheet Snubber

How to Wire Snubber?


Thermosphere Snubber

Delivery Information

We have multiple delivery options

  • Next day carrier
  • 2-3 day carrier
  • Click & Collect from store


The cost of the carriage will be displayed before your final checkout. Free delivery is available on most items for orders over £150, exceptions do apply.


  • Orders will only be dispatched and delivered on weekdays.
  • Orders for the next working day delivery must be placed before 2 pm, this gives us time to pick and pack before the carrier arrives to collect.
  • We aim to dispatch all carrier delivered items within 48hrs, and all items delivered on our own transport within 5 days, Monday to Friday.
  • A dispatch email will be sent when your goods leave us, if delivery is by the carrier, this email will include tracking information. If your order is delayed for any reason, we will contact you.


We pride ourselves on our customer service but mistakes can happen. If you receive an incorrect or faulty item, please notify us within 30 days to arrange a refund, return or exchange.

Thermosphere Snubber