Fire-Lite SD365 LiteSpeed Addressable Photoelectric Smoke Detector with Base, White
The Fire-Lite SD365 is a low-profile, addressable photoelectric smoke detector designed exclusively for compatible Fire-Lite addressable fire alarm control panels operating with the LiteSpeed protocol. Its enhanced optical sensing chamber is engineered to detect smoke from a broad range of combustion sources while meeting modern commercial fire-detection requirements.
The detector connects directly to a two-wire signaling line circuit (SLC). Rotary decimal address switches give each detector a unique point identification, allowing the fire alarm panel to report the device’s precise programmed location. Dual LEDs provide highly visible status indication: they blink during panel polling and latch on when an alarm is activated.
A detachable mounting base, SEMS wiring screws, removable cover and insect-resistant screen help simplify installation, inspection and field maintenance. The SD365 also supports magnetic functional testing, panel-based sensitivity testing and walk testing when used with a compatible Fire-Lite system.
Main Features
- Addressable photoelectric smoke detection
- Designed for Fire-Lite LiteSpeed SLC systems
- Two-wire SLC loop connection
- Rotary decimal address switches
- Point identification for precise detector-location reporting
- Enhanced optical sensing chamber
- Factory-preset 1.5% nominal alarm threshold
- Dual polling and alarm-status LEDs
- Built-in tamper-resistant feature
- Functional testing using an external test magnet
- Walk-test support with address display
- Removable cover and insect-resistant screen
- Low 200 µA standby-current draw at 24V DC
- Sealed against back pressure
- Detachable base with SEMS wiring screws
- Surface- or electrical-box mounting
- Remote LED annunciator output
- Designed to meet UL 268, 7th Edition requirements
Compatibility and Replacement Notice
The SD365 is a LiteSpeed-only detector and must be used with a compatible Fire-Lite addressable fire alarm control panel. It is identified as a replacement for the legacy SD355, but it should not be treated as a universal drop-in replacement for every SD355 installation. Please note Honeywell identities the SD365 Series as discontinued.
Before ordering, verify the fire alarm control panel model, firmware, SLC operating protocol and approved device-compatibility documentation. Legacy systems operating only in CLIP mode may not support the white SD365. The separately sold ivory SD365-IV is the variant listed for both LiteSpeed and CLIP operation. Fire-Lite’s current panel documentation identifies the SD365 as LiteSpeed-only and the SD355 as a legacy device.
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What’s Included
- 1 × Fire-Lite SD365 smoke-detector head
- 1 × B300-6 white, 6-inch flanged low-profile mounting base
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Recommended Applications
- Compatible Fire-Lite addressable fire alarm systems
- Commercial and institutional fire detection
- Offices, schools and retail facilities
- Hotels and multifamily common areas
- Healthcare and government facilities
- Professionally designed SD355 replacement projects
- New or existing LiteSpeed SLC installations
This is a system-connected commercial fire detector. It is not a standalone residential smoke alarm and does not contain an integral sounder, heat sensor or carbon-monoxide sensor.
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Shipping & Returns
Shipping & Returns
• Shipping: Orders are processed within 2-3 business days. Standard delivery takes 5-8 business days depending on your location. Free Shipping on orders over $99.
• Returns: You may return or exchange products within 15 days of receiving your order. Items must be in original condition with proof of purchase.
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Discover more in our FAQ
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How long does it take to process an order?
How long does it take to process an order?
Orders are typically processed within 2-3 business days. You will receive a confirmation email with tracking details once your order has been shipped. Please note that processing times may be slightly longer during high-demand periods or sales events.
What is your return policy?
What is your return policy?
We accept returns within 15 days of delivery. To be eligible, items must be unused, in their original packaging, and accompanied by proof of purchase.
Do you ship internationally?
Do you ship internationally?
Not at this time, we only ship within the US.

