Harsh Environment Strobes CS405-7A-8A

Manufacture: kidde
Product code: CS405

MS Series ✔️
✅ strobes are specially designed for use with compatible life safety communication and control equipment to alert the hearing impaired of a life safety event ✔️
✅ Strobes are available with 15 cd, 15/75 cd, 30 cd, 60 cd, and 110 cd effective flash intensity. They are fully compatible with Genesis signal


Consulting hotline: 0944934114
Product information

- 4MS Series strobes exceed UL synchronization requirements (within 10 milliseconds other over a two-hour period) when used with a separately-installed EG1M Signal Master, or GSA-CC1S Synchronization Module, or when powered by suitably enabled booster power supplies and control panels.

- The flash 4MS Series strobes can be noticed almost any position in the room, corridor, or large open space. 4MS Series strobes are UL 1971 listed with both wall and ceiling cd intensity ratings (see Specifcations). This is useful in areas where the Authority Having Jurisdiction (AHJ) permits ceiling-mount strobes.

- 4MS Series strobes are designed for 16 to 33 Vdc operation and must be connected to signal circuits that output a constant (not pulsed) voltage. A diode is used to allow full signal circuit supervision and polarized connections are made to terminals that accept up to #12 AWG (2.5mm²) wire.

- The strobe front plate is of steel construction fnished with durable baked epoxy polyester powder-coat paint.

Standard Features

• UL 1971-listed synchronizing strobe

- Integrity strobes synchronize to the latest UL 1971 requirements when used with a synchronization source.

• Genesis-compatible

- All Genesis and Integrity strobes on the same circuit meet UL 1971 synchronization requirements when used with an external control module.

• Approved for public and private mode applications

- UL 1971-listed as signaling devices for the hearing impaired and UL 1638-listed as protective visual signaling appliances.

• Rugged red or white steel front plate

- Ideal for outdoor or harsh environments.

• Rated for wall or ceiling installation

• Field changeable feld markings

Lens language or standard “FIRE” marking is easily changed with optional LKW and LKC series lens kits.

• Fits 4-inch square flush box

- Ideal for retroft and renovation projects.

• UL/ULC rated outdoor option


- Kidde strobes are UL 1971-listed for use indoors as wall-mounted public-mode notifcation appliances for the hearing impaired. Prevailing codes require strobes to be used where ambient noise conditions exceed specifed levels, where occupants use hearing protection, and in areas of public accommodation. Consult with your Authority Having Jurisdiction for details.

- As part of the Enhanced Integrity line of products, 4MS Series strobes exceed UL synchronization requirements (within 10 milliseconds other over a two-hour period) when used with a synchronization source. Synchronization is important because a small portion of the population have a condition which may cause them to become disoriented multiple random flashes of light. Integrity strobes minimize this risk.

- Integrity strobes are fully compatible with Kidde Genesis signals

Installation and Mounting

All models ft to a standard flush mounted, North American four inch electrical box, 1-1/2 inch (38 mm) deep minimum. Optional Kidde weatherproof, surface mount boxes are available. The strobes must be connected to signal circuits which output a constant (not pulsed) voltage. Kidde recommends that these strobes always be installed in accordance with the latest recognized edition of national and local fre alarm codes.

Harsh Environment Strobes (-3A, -5A, -6A, -7A -8A)


Catalog Number









UL 1638/ULC S526
Rated Strobe Output

15cd 30cd 60cd 15/75cd 110cd

UL 1971 Rated Strobe

(wall only)

30cd wall
15cd ceiling

60cd wall
30cd ceiling

15cd wall
15cd ceiling

110cd wall
60cd ceiling

Strobe Flash Rate

Synchronized at one flash per second. External control module necessary to meet UL 1971 synchronization requirements of
10 milliseconds over a two-hour period.

Synchronization Sources


Strobe Operating Volts

Continuous 16 to 33 Vdc or 16 to 33 Vfwr

Operating Environment

INDOOR: 30º C @ 85% RH; 32 - 120º F (0 - 49º C) ambient temperature.
OUTDOOR (CS models only): 30º C @ 93% RH; -40-150º F (-40-66º C) ambient temp ‘7A’ (17.7cd @ -35º C per UL @ -40º
C per ULC) and; ‘8A’ (70.7cd @ -35ºC per UL @ -40ºC per ULC) models only

Lens Markings

Supplied with LKW-1 “FIRE” red letters, vertical both sides (Wall Mount)
- see LKW and LKC series for ceiling style and optional markings

Wire Connections

Terminals - polarized input, #12 AWG (2.5mm²) max wire size

Flash Tube Enclosure


Strobe Plate, Finish

CRS steel - 5½ in (140mm) square, red or white baked epoxy polyester powder-coat fnish


INDOOR: North American 4 in square electrical box;
OUTDOOR: 74347U series weatherproof surface box

Agency Listings

UL 1971, UL 1638, ULC S526, CE, FM, CSFM, MEA (All models comply with ADA Code of Federal Regulation Chapter 28
Part 36 Final Rule)

Ordering Information



Ship Wt. lb (kg)


Strobe, 15 cd, Red

1 (0.4)
4MS-5ARW Strobe, 15 cd, White
4MS-7AR Strobe, 15 cd/75, Red
4MS-7ARW Strobe, 15 cd/75, White
4MS-3AR Strobe, 30 cd, Red
4MS-3ARW Strobe, 30 cd, White
4MS-6AR Strobe, 60 cd, Red
4MS-6ARW Strobe, 60 cd, White
4MS-8AR Strobe, 110 cd, Red
4MS-8ARW Strobe, 110 cd, White

Outdoor Listed Strobes

Outdoor Listed Strobes


Strobe, 15/75, Outdoor, Red

1 (0.4)

Strobe, 110cd, Outdoor, Red

Synchronization Sources


Genesis Signal Master Remote Mount (1-gang)

0.2 (0.1)


Synchronization Output Module (Standard Mount) - UL/ULC

0.5 (0.23)


Synchronization Output Module (UIO Mount) - UL Listed

0.18 (0.08)


6.5 Amp Booster Power Supply

13 ( 5.9)


10 Amp Booster Power Supply

13 ( 5.9)


6.5 Amp Auxiliary Power Supply

26 (11.8)


10 Amp Auxiliary Power Supply

26 (11.8)

Mounting Accessories

Harsh Environment Strobes (-3A, -5A, -6A, -7A -8A)


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