Fire Fire
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AC/DC Fire

12v or 24v 30 amp



When cranking engine, vehicle electronics systems are in standby to prevent data loss, the heavy current draw of cranking combined with a full electronics suite can cause voltage drops severe enough to upset memorized settings. By delaying the equipment activation until after the engine is completely started, the on/on delay timer prevents data loss and vehicle down time.

  • Emergency override switch provides a convenient way to restore power to your equipment by holding the button in
  • Electronic equipment protection system, computers, GPS, AVL and etc.
  • Low / High voltage detection and shutdown
  • Automatic On/Off - no user intervention required
  • Prevents battery deep discharge
  • Programmable with external DIP switch for selecting and adjusting time delay
  • Built-in diagnostic red LED indicates timing functions active when flashing
  • Engineered electronically for reverse polarity protection
  • Potted compound construction. Solid state, sealed against vibration and moisture.
  • Easy external connection with .250 male tab mating with .250 female disconnect
  • Delay time range:from 5 seconds to 120 seconds (2 minutes). Tolerance plus (+) or minus (-) 10%
  • Allow 3-5 seconds for delay on break at ignition switch connection for delay activation
  • For installation, connect the red wire (+) to a master switch and the black wire (-) to the battery negative post. Connect the blue wire to fuse block (AM/FM radio) or cigarette lighter.


Technical Specifications
Length4 in.
Width2 in.
Height1.5 in.
Mounting Hole Center3.5in with #6 screws
Weight6 oz.
Enclosure MaterialImpact Resistant ABS thermoplastic

Electrical Specifications
Load Current Rate30 amps 24 VDC
Operating Voltage18 VDC min - 33 VDC max
Ignition Switch Trigger19 - 26 VDC, 10mA
Low Voltage Disconnect19
Over Voltage Disconnect30 volts
Operating Temperature-40 F to +185 F
Stand-by Current6 mA
Operating Current100 mA

Caution: An appropriate size fuse circuit breaker must be used to ensure safety.

FREE standard shipping for online orders with with an order total of $99 or higher.
$6.95 standard shipping for online orders with an order total of $98.99 or below. Qualifying amount applies to merchandise only. Subject to change without notice. Offer valid for standard shipping within the contiguous United States (some restrictions apply such as shipping to Canada, Alaska, Hawaii, and all other destinations outside the continental United States including APO and FPO addresses are not eligible for this promotion and may incur additional charges). Additional fees apply to haz-mat/chemicals/ aerosols, over sized or unusually heavy items/orders,including but not limited to ladders, fire hose, pepper spray, fire extinguishers, full-size light bars and spike strips. Some vendors are also excluded, view a list of excluded brands here.

Shipping rates apply to all products. Some orders may require additional shipping charges.

Standard Shipping Charges

Charges for addresses in the contiguous United States only.
Order Total Standard 2-Day Air** Next Day Delivery
Up to $25 $8.49 $6.95 $28.48 $33.48
$25.01 to $50.00 $10.49 $6.95 $30.48 $35.48
$50.01 to $98.99 $12.49 $6.95 $32.48 $37.48
$99.00 to $150.00 $14.49 $0 $34.48 $39.48
$150.01 to $200 $16.49 $0 $36.48 $41.48
$200.01 to $250.00 $18.49 $0 $38.48 $43.48
$250.01 to $300.00 $20.49 $0 $40.48 $45.48
$300.01 to $350.00 $23.49 $0 $43.48 $48.48
$350.01 to $400.00 $25.49 $0 $45.48 $50.48
$400.01 to $500.00 $27.49 $0 $47.48 $52.48
$500.01 to $750.00 $31.49 $0 $51.48 $56.48
$750.01 to $1,000 $34.49 $0 $54.48 $59.48
$1,000.01 and over $38.49 $0 Contact us for a quote

AC/DC Fire

Item #: MZL-FD

Was $82.54

Now $81.99
More on the way! Item will be available to ship within 5-7 business days

Customer Reviews

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    • Protects Electronics!  –  Review by , posted on
      I have one of these MZL-FD delay timers in both of my vehicles. It prevents the starting surge of the vehicle and then turns on my two way radios and lightbar controller 30 seconds after the engine is running. The one I'm purchasing today, will prevent a charger surge from the AC coming on in my amateur radio tower.

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