A purely passive mechanism based on thermal detection and the release of an extinguishing aerosol. No electronics, no human intervention, no false alarms possible.
Official demonstration video: automatic activation in the presence of an electrical fire.
The built-in trigger is calibrated to react at 170°C, a temperature reached only in case of short circuit, electric arc or combustion. No electronic sensor, therefore no risk of false alarm.
The temperature rise triggers a controlled chemical reaction inside the housing. The oxidant turns into solid aerosol that instantly spreads through the protected volume.
The aerosol acts by interrupting the combustion chemical reaction at the molecular level. The fire goes out without a sudden drop in temperature, avoiding damage to components.
A power strip in the living room was left plugged in. The cable heats up at the circuit breaker. No one sees it. No one smells it.
The insulator melts, an electric arc appears. The temperature around reaches 600°C. The plastic of the cables begins to burn.
The thermal trigger reaches its threshold. The aerosol is released and saturates the electrical panel.
The fire is extinguished before it spreads outside the panel. The family continues to sleep. In the morning, you call your electrician.
Without Firestop, at T+5 minutes, the fire would have reached the hallway.
At T+10 minutes, the bedrooms.