The HD202 Mini Addressable Heat Detector is an intelligent fire detection device designed to deliver fast and reliable heat sensing in addressable fire alarm systems. It utilizes a state-of-the-art thermistor-based sensing circuit to ensure rapid response to temperature changes, making it ideal for environments where smoke detection may not be suitable. This detector provides open-area protection with up to 50 ft spacing capability and operates as a rate-of-rise heat detector with a fixed temperature alarm threshold of 135°F (57°C). Each unit features an address stored securely in the MCU’s EEPROM, which can be easily programmed using a portable address-setting device. Equipped with dual high-visibility LEDs, the HD202 offers 360° visual indication of device status. The LEDs can be latched ON by a command from the control panel during alarm conditions or unlatched automatically when normal conditions are restored. Designed for dependable performance, the HD202 requires compatible addressable communication protocols and must be connected only to listed, compatible fire alarm control panels. It is suitable for commercial, industrial, and residential fire safety applications. Specifications Detector Type: Addressable Heat Detector Model: HD202 Mini Sensing Method: Thermistor-based heat sensing Operating Voltage Range: 15 – 28 VDC (Peak) Standby Current: 650 µA @ 24 VDC (One communication every 5 seconds with LED blink enabled) LED Current: 5 mA @ 24 VDC Alarm Type: Rate-of-Rise Fixed Temperature: 135°F (57°C) Coverage Area: Open-area protection up to 50 ft spacing Addressing Method: EEPROM-stored, programmable via portable address device LED Indicators: Dual LEDs with 360° visibility, panel-controlled Operating Temperature Range: 14°F to 122°F (-10°C to +50°C) Operating Humidity Range: 10% to 93% RH (Non-condensing) Mounting Type: Plug-in Compatibility: Listed addressable fire alarm control panels only Application: Commercial, industrial, and residential installations