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Replacement for FireAngel ST-620 10 Year Smoke Alarm - FireAngel FA6120-INT

4.6 out of 5 stars
£18.90 inc VAT
£15.75 ex VAT
Product Overview

The very popular FireAngel ST-620 10 year optical smoke alarm was discontinued by the manufacturer in 2018. The FireAngel FA6120-INT has been designed to simply twist onto your existing base plate with no need to drill any more holes in your ceiling or redecorate.

Suitable for BS 5839-6: 2019 Grade F1 domestic installations, the FireAngel FA6120-INT features a Sleep Easy function which can silence low battery warnings for up to 8 hours and a large, central test / hush button for easy weekly testing – including a reduced volume feature to avoid startling occupants. It is the ideal solution to replace your old ST-620 with no need to change the base plate or redecorate.

  • FREE delivery
  • Optical smoke sensor suitable for installations in hallways, landings, living areas, and bedrooms
  • Battery: 10 year sealed lithium battery
  • Warranty: 5 year manufacturer's warranty
  • Replace your old ST-620 with no need to change the base plate or redecorate
  • Large, central test / hush button for easy weekly testing
    • Single press – self-test at a reduced volume
    • Double press – self-test at full alarm volume
  • Sleep Easy™ function silences the low battery chirp for up to 8 hours
  • Low battery warning to indicate when the alarm is due to be replaced
  • Suitable for installations complying to BS 5839-6: 2019 Grade F1
  • CE marked, UKCA marked, and Kitmarked to BS EN 14604: 2005
Technical Data
Product Code FAREST620
Alternative Product Codes ST-620, ST620, FAST620, FA6120-INT
Brand FireAngel
Battery Type

10 Year Sealed Lithium

Dimensions (HxDia)

32 x 118mm

Operating Humidity

Up to 90% RH (non condensing)

Operating Temperature

+4°C to +38°C

Sound Output

85dB at 3 metres


5 year manufacturer's warranty

Weight 0.25kg
Product Datasheets

Pricing & Availability

Model Stock Price
Product Code: FAREST620 Stock Level:
More than 20 in stock Expected dispatch: 4th Dec

£18.90 inc VAT

£15.75 ex VAT

Delivery Options

The following delivery options are available on this product.

Free Economy Delivery

Free of Charge - Orders will be delivered in 2-3 working days with Evri

Next Working Day Delivery

£6.19 inc VAT - Orders will be delivered the next working day with Evri

For dispatch today order within

Excellent Warranty

This product is supplied with a 5 year manufacturers warranty as standard

Customer Reviews

8 customers have given this product an overall rating of 4.6 out of 5

Reviews by real customers

All of our product reviews are written by real customers that have purchased this product from us and are published without modification.

Rating: 5 / 5 Stars

Reviewed by: w b

very very good

Published on: 9th November 2023

Rating: 5 / 5 Stars

Reviewed by: A C

Top class product

Published on: 22nd October 2023

Rating: 4 / 5 Stars

Reviewed by: P G

Well made and lasted 7 of the 10 years anticipated

Published on: 29th September 2023

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