Simplex, now part of Johnson Controls, is one of the most widely installed fire alarm brands in North America. Simplex systems are found in hospitals, universities, airports, high rises and industrial plants, and they are maintained for decades rather than replaced. That long service life is exactly why the parts are hard to find, and it is what this collection is aimed at.
With well over a thousand Simplex line items in stock, we cover:
- Simplex smoke detectors and sensors - photoelectric, heat, combination photoelectric and heat, and carbon monoxide sensors, plus replacement cartridges
- Sensor bases, including standard, sounder and relay bases
- Duct detectors, duct housings and duct covers
- Addressable modules - individual addressable modules, zone adapter modules, relay modules and NAC extenders
- Single and double action pull stations, break rods and station keys
- Horns, strobes, horn strobes and speaker strobes, wall and ceiling mount
- Device covers, cover plates and trim in red and white
Much of what we hold is discontinued or superseded Simplex stock kept specifically for existing installations. If a part is not listed, send the number through our quote page.

Simplex
Simplex 59AVC-WWA AV Cover Wall White Alert
Sale price$9.20
Regular price$11.04
Not in stock - available on backorder - lead time on request
Simplex
Simplex 565-275 Mother Board Class B Assembly
Sale price$149.05
Regular price$178.86
Not in stock - available on backorder - lead time on request
Simplex
Simplex 49VOC-WRALT-O VO Cover, Wall Red Alert WP
Sale price$55.25
Regular price$66.30
Not in stock - available on backorder - lead time on request
Simplex
Simplex VSR-13D01-S04 High-Level Interface (HLI) and Programmer Rack-mount Assembly for Integrated Monitoring and Control of Up to 30 Detectors Via
Sale price$3,388.55
Regular price$4,066.26
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4902-9716CA Rectangular Housing, Wall Mount Speaker, Red with White FIRE Lettering
Sale price$266.00
Regular price$319.20
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-1319 100W AMP, 6NAC, 220/30/40VAC, 70V
Sale price$1,389.00
Regular price$1,666.80
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-1254 Audio IF 2 Channel
Sale price$262.90
Regular price$315.48
Not in stock - available on backorder - lead time on request
Simplex
Simplex 49MTV-APPLW MTV Appliance Only Wall
Sale price$107.25
Regular price$128.70
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4190-8606 Wired Network Media Card
Sale price$142.15
Regular price$170.58
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Simplex
Simplex 4100-1412 ES NET Basic Audio with MIC
Sale price$2,040.40
Regular price$2,448.48
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4098-VEP-A00-1P One Pipe Aspirating Smoke Detector with LEDs
Sale price$7,371.30
Regular price$8,845.56
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4010-9721 4010ES Idnac 2IDNET Red 240V
Sale price$2,980.75
Regular price$3,576.90
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4100-1364 Digitalflex 35W AMP, 3NACS-70V
Sale price$1,916.50
Regular price$2,299.80
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4010-9505 1 BAY, 2X40, 1 Esmx, 220/240V, Red
Sale price$3,059.85
Regular price$3,671.82
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4010-9522 4010ES 2 Idnet 2 BAY Plat 240V
Sale price$3,032.10
Regular price$3,638.52
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4090-5258 Supervised IAM, Mounted in Thermoplastic Housing with Screw Terminals
Sale price$54.00
Regular price$64.80
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4009-9704 4009 Extender Plus, Idnac, PLT
Sale price$2,081.20
Regular price$2,497.44
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4081-9003 EndofLine Resistor Harness, 4.7 K, 12 W
Sale price$11.45
Regular price$13.74
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4010-6310 Esnet Ntwk Interface Card Flat
Sale price$889.10
Regular price$1,066.92
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4009-9703 4009 Extender Plus, Idnac, Red
Sale price$2,081.20
Regular price$2,497.44
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4009-9705 4009 Idnac Extender, Red
Sale price$1,190.20
Regular price$1,428.24
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4007-6308 ES NET SM Fiber Media Card
Sale price$594.85
Regular price$713.82
Not in stock - available on backorder - lead time on request
Simplex
Simplex 566-1424 IDNAC Power Supply Board Assembly, Service Part for 4017ES Voice Fire Alarm Control Unit
Sale price$1,243.90
Regular price$1,492.68
Not in stock - available on backorder - lead time on request
Simplex
Simplex 4009-9202CA IDNet NAC Extender, ULC Listed, 120 VAC, Four Class B NACs, 8A Supply
Sale price$830.90
Regular price$997.08
Not in stock - available on backorder - lead time on request