Siemens Fire Alarm Replacement Parts — Complete Inventory

Life Safety Consultants is your trusted national source for Siemens fire alarm replacement parts. Whether you’re maintaining a legacy Siemens system or upgrading components in a modern Cerberus PRO or Desigo CC installation, we stock the field-tested parts you need — ready to ship fast at competitive prices.

Siemens Cerberus PRO & Desigo CC Panel Parts

Siemens’ flagship addressable fire alarm platforms — the Cerberus PRO (FC72x series) and Desigo CC (MXL, FC2025) — are widely deployed in hospitals, universities, and commercial high-rises. We carry Siemens Cerberus PRO parts including main CPU boards, network cards, loop cards, power supply modules, and chassis components. Keep your panel running without waiting weeks for factory orders. See our Siemens Cerberus PRO Panel Replacement Parts Guide for a full breakdown of panel components.

Smoke Detectors: FDO, FDCO & Optical Point Detectors

Siemens optical and combination smoke detectors are built for precision and reliability in addressable systems. Our inventory includes:

  • FDO421 — Optical (photoelectric) smoke detector
  • FDCO421 — Combination optical/CO detector
  • FDOOT441 — Optical/thermal combined point detector

All compatible with DB-11 and DB-11E detector bases. Read our Siemens FDO, FDOT, FDOOT Detector Guide for full compatibility details.

Duct Smoke Detectors: FDOOT & FDOOTC Series

For HVAC and air-handling unit monitoring, Siemens’ duct detector line is the standard in large commercial buildings. We stock the FDOOT241, FDOOTC441, and related duct detector housings and accessories required for code-compliant duct smoke detection installations.

Heat Detectors: FDT Series

Siemens FDT addressable heat detectors provide fixed-temperature and rate-of-rise detection for areas where smoke detectors are impractical — kitchens, boiler rooms, and dusty environments. We carry FDT421 and compatible models.

Addressable Modules: FZM, FCM & FIM

Expand and integrate your Siemens system with addressable modules including:

  • FZM — Zone monitor modules
  • FCM — Control and relay output modules
  • FIM — Fault isolator modules

These modules enable seamless integration of conventional devices, relay outputs, and supervised circuits into your addressable loop.

Detector Bases: DB-11 & DB-11E

The DB-11 and DB-11E addressable detector bases are the standard mounting solution for Siemens FDO, FDCO, FDOOT, and FDT series detectors. Stock these bases for every detector replacement or new installation project.

Notification Appliances: SPSS, WPSS Strobes & ZR-MC Horn Strobes

Life Safety Consultants stocks Siemens notification appliances including SPSS surface-mount strobes, WPSS wall-mount strobes, and ZR-MC combination horn/strobe units. These devices meet UL 1971 and UL 464 standards for audible and visible notification.

Pull Stations & Manual Stations: HMS-S Series

Replace damaged or outdated pull stations with Siemens HMS-S addressable manual call points. Single-action and dual-action versions available to meet local code requirements.

Power Supplies

Keep your Siemens system powered with compatible auxiliary and main power supply units. We stock booster power supplies, battery chargers, and UPS modules for Cerberus PRO and legacy Siemens panels.

Learn More: Siemens Technical Guides

Why Choose Life Safety Consultants for Siemens Parts?

  • Fast shipping — Most orders ship within 1–2 business days
  • Competitive pricing — No dealer markup; direct savings for facilities teams
  • Wide inventory — Current and discontinued Siemens parts in stock
  • Expert support — Our team knows Siemens systems inside and out

Browse our full selection of Siemens fire alarm replacement parts below, or contact us for help finding the exact part number you need.