---
product_id: 52450656
title: "Kidde KF20 Optical Smoke Alarm"
brand: "kidde"
price: "260.54 DT"
currency: TND
in_stock: true
reviews_count: 10
category: "Kidde"
url: https://www.desertcart.tn/products/52450656-kidde-kf20-optical-smoke-alarm
store_origin: TN
region: Tunisia
---

# 9V battery backup Interlink up to 23 alarms 6-year warranty Kidde KF20 Optical Smoke Alarm

**Brand:** kidde
**Price:** 260.54 DT
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay ahead of danger with Kidde KF20 — your smart shield against fire! 🛡️

## Quick Answers

- **What is this?** Kidde KF20 Optical Smoke Alarm by kidde
- **How much does it cost?** 260.54 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/52450656-kidde-kf20-optical-smoke-alarm)

## Best For

- kidde enthusiasts

## Why This Product

- Trusted kidde brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Connected Protection:** Interlink up to 23 Firex series alarms for seamless, whole-home fire detection.
- • **Uninterrupted Safety:** Mains powered with 9V alkaline battery backup ensures your home stays protected even during power outages.
- • **User-Friendly Design:** LED indicator, test & hush button, plus low battery warning chirp for effortless maintenance.
- • **Certified Reliability:** CE and Kitemarked to BS EN 14604:2005, meeting the latest BS 5839-6:2019 Grade D2 standards.
- • **Hassle-Free Installation:** Supplied with screws and rawl plugs, plus compatible with existing bases for quick replacement.

## Overview

The Kidde KF20 Optical Smoke Alarm is a mains-powered, photoelectric smoke detector featuring a 9V alkaline battery backup for continuous protection. It can interlink with up to 23 other Firex alarms, providing comprehensive fire safety coverage. Certified to the latest UK safety standards, it includes user-friendly features like LED indicators, test and hush buttons, and low battery alerts. Easy to install with included fixings and backed by a 6-year manufacturer warranty, it’s a reliable upgrade for any modern home.

## Description

From the manufacturer

Review: Excellent Replacement for our old Smoke Alarms - Easy to replace our existing smoke alarms with the Kidde KF20 as they use the same base fittings. Just wish the company reinforced the fact they should be replaced every 10 years!! Our old ones had been installed when the house was built 21 years ago and the manufacturer has now marked the devices to state they should be replaced in 2034!!
Review: Always may sure electrical connection is compatible and test alarm after installation - Fire alarm arrived next day and was easy to fit, just plugged into existing wiring

## Features

- Mains powered smoke alarm with 9 volt alkaline battery back-up.
- Interlink with up to 23 other alarms in the Firex series to create all round fire protection.
- CE marked and Kitemarked to BS EN 14604: 2005 and suitable for installations complying to BS 5839-6: 2019 Grade D2.
- LED indicator, test and hush button, low battery warning chirp.
- Supplied with fixings; 2 x screws and 2 x rawl plugs and has a 6 year manufacturer’s warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B012CDAWPA |
| Alarm | Visual |
| Best Sellers Rank | 57,511 in DIY & Tools ( See Top 100 in DIY & Tools ) 144 in Smoke Alarms |
| Brand | Kidde |
| Colour | White |
| Country of Origin | China |
| Customer Reviews | 4.6 out of 5 stars 453 Reviews |
| Global Trade Identification Number | 00047871259717 |
| Included Components | Smoke Alarm Mounting bracket 9V Alkaline battery |
| Item Dimensions D x W x H | 13.5D x 5.5W x 13.5H centimetres |
| Item Type Name | Smoke Alarm |
| Item Weight | 0.24 Kilograms |
| Item weight | 0.24 Kilograms |
| Manufacturer | Kidde |
| Manufacturer Warranty Description | 6 years. |
| Material | Plastic |
| Model Number | KF20 |
| Number of Items | 1 |
| Part Number | KF20 |
| Power source | Battery Powered |
| Product Style | Classic |
| Product dimensions | 13.5D x 5.5W x 13.5H centimetres |
| Sensor Type | Photoelectric |
| Style | Classic |
| UPC | 047871259717 |
| Unit Count | 1.0 count |

## Product Details

- **Alarm:** Visual
- **Brand:** Kidde
- **Colour:** White
- **Global Trade Identification Number:** 00047871259717
- **Item weight:** 0.24 Kilograms
- **Material:** Plastic
- **Power source:** Battery Powered
- **Product dimensions:** 13.5D x 5.5W x 13.5H centimetres
- **Sensor type:** Photoelectric
- **Style:** Classic

## Images

![Kidde KF20 Optical Smoke Alarm - Image 1](https://m.media-amazon.com/images/I/71HXHWTdaZL.jpg)
![Kidde KF20 Optical Smoke Alarm - Image 2](https://m.media-amazon.com/images/I/71XOxXJuolL.jpg)
![Kidde KF20 Optical Smoke Alarm - Image 3](https://m.media-amazon.com/images/I/71h1uRw6rwL.jpg)
![Kidde KF20 Optical Smoke Alarm - Image 4](https://m.media-amazon.com/images/I/21s37EszteL.jpg)
![Kidde KF20 Optical Smoke Alarm - Image 5](https://m.media-amazon.com/images/I/91wfEhxS4UL.jpg)

## Questions & Answers

**Q: I have a kf1r. whats the model to use that will fit the back plate. i also assume that the connectors are the same.**
A: The KF1R is the 2nd generation and discontinued by the manufacturer.  The compatible replacement for this is the KF10R.  The KF10, KF10LL, KF10R, KF20, KF20LL, KF20R, KF30, KF30LL and KF30R all come with a mounting plate so can also be used as a replacement.

**Q: I have at the moment 2 kidde firex kf2 4973 fitted and one appears to be faulty. is this unit compatible as a replacement**
A: As far as I can tell the KF20 is a direct replacement for the 4973, see this quote from an online seller :-
" The Kidde KF20 / 4973 is a 230V Optical Smoke Detector with Alkaline Battery Back Up from the Kidde Firex range."
The mains connector blocks look exactly the same.  Hope that helps.

**Q: what new model has replaced the old Firex 120-1125E please?**
A: This is the replacement

**Q: Can this replace a kf10**
A: Yes it can

## Customer Reviews

### ⭐⭐⭐⭐⭐ Excellent Replacement for our old Smoke Alarms
*by P***N on 6 May 2024*

Easy to replace our existing smoke alarms with the Kidde KF20 as they use the same base fittings. Just wish the company reinforced the fact they should be replaced every 10 years!! Our old ones had been installed when the house was built 21 years ago and the manufacturer has now marked the devices to state they should be replaced in 2034!!

### ⭐⭐⭐⭐⭐ Always may sure electrical connection is compatible and test alarm after installation
*by A***R on 11 February 2026*

Fire alarm arrived next day and was easy to fit, just plugged into existing wiring

### ⭐⭐⭐⭐⭐ Reliable genuine product
*by R***S on 15 September 2025*

Good quality genuine product at a competitive price

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-03*