Smoke Alarm BRK Model FG250B Teardown

The FG250B is one of BRK's most economical Ionization Smoke Alarms. It can be found for under $6. The FG225 is the same as FG250B but without the silience feature. You cannot find the FG225 on Amazon or eBay so does it really exist. The FG200 is the same as the FG250B but with the blinking power-on LED. Some people might not want the blinking LED at night

Llimitations:

(2) It is a single station alarm; it cannot be interconnected to other BRK smoke alarms so if one alarms, they all alarm.

(1) It is powered by a 9-volt transistor battery; it cannot be connected to 120 volts AC.

For Maximum Resolution, Click on the Body of the Picture.

Front of BRK FG250B Box. — Front of BRK Model FG250B Box.

Back of BRK Model FG250B Smoke Alarm — Back of BRK Smoke Alarm Model FG250B.

Inside the BRK Model FG250B Smoke Alarm — Inside the BRK Smoke Alarm Model FG250B.

Component Side of PC Board - BRK Model FG250B Smoke Alarm.

Radioactive Source, Americium 241- BRK Model 9120 Smoke Alarm — Radioactive Source, Americium 241 & Piezoelectric Horn Disc.

Back Side of PC Board - BRK Model FG250B Smoke Alarm — Back Side of PC Board BRK Smoke Alarm Model FG250B.

Micro Chip RE46C122. — BRK uses an Application Specific Intergraded Circuit (ASIC), RE46C122, manufactured by Micro Chip - Data Sheet