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Home --> FireLite
H 355A
  • General
  • Feature
  • Specification
The Fire•Lite Alarms H355 Series thermal detectors are addressable sensors that use a state-of-the-art thermistor sensing circuit for fast response. These sensors are designed to provide open-area protection and are intended for use with the Fire•Lite’s addresable Fire Alarm Control Panels (FACPs). The H355(A) and H355R(A) sensors provide fixed temperature alarm detection at 135°F (57°C). The H355R(A) sensor also responds to rate-of-rise conditions of greater than 15°F (8.3°C) per minute. The H355HT(A) is a fixed high-temperature detector that activates at 190°F (88°C). These thermal detectors provide cost effective, addressable property protection in a variety of applications. Two LEDs on each sensor light to provide a local, visible sensor indication. Remote LED annunciator capability is available as an optional accessory (P/N RA400Z).

SLC loop:

• Two-wire SLC loop connection.

• Unit uses base for wiring.


• Addressable by device.

• Direct Decade entry of address: 01 – 159 with MS-9600, 01

– 99 with MS-9200UD.


• Sleek, low-profile, stylish design.

• State-of-the-art thermistor technology for fast response.

• Integral communications and built-in device-type identification.

• Built-in tamper resistant feature.

• Built-in functional test switch activated by external magnet.


• Factory preset at 135°F (57°C) for the H355(A) and

H355R(A); 190°F (88°C) for the H355HT(A).

• Rate-of-rise triggers at 15°F (8.3°C) per minute for the H355R(A).

• 360°-field viewing angle of the visual alarm indicators (two bicolor LEDs). LEDs blink green in Normal condition and turn on steady red in Alarm.

• Visible LEDs “blink” every time the unit is addressed.


• Sealed against back pressure.

• SEMS screws for wiring of the separate base.

• Designed for direct-surface or electrical-box mounting.

• Plugs into separate base for ease of installation and maintenance.

• Separate base allows interchange of photoelectric, ionization and thermal sensors.

Other system features:

• Remote test feature from the panel.

• Walk test with address display.

• Low standby current.

Diameter: 6.1"" (15.5 cm) installed in B350LP(A).

Height: 2.1"" (5.33 cm).

Weight: 4.8 oz. (137 g).

Installation temperature: –4°F to 100°F (–20°C to 38°C).

Humidity range: 10% to 93% relative humidity (noncondensing).

Voltage range: 15 to 32 VDC peak.

Standby current: 300 μA @ 24 VDC (one communication every five seconds with LED blink enabled).

LED current: 6.5 mA @ 24 VDC.

Mounting: B350LP(A) flanged base, included.

Fixed-temperature setpoint: 135°F (57°C) for the H355(A) and H355R(A); 190°F (88°C) for the H355HT(A).

Rate-of-rise detection: responds to greater than 15°F (8.3°C) per minute.