The Watch Dog automatic battery disconnect switch is capable of handling 300 amps of current continuously and is versatile in its ability to handle both 12V and 24V systems. Utilizing bistable “magnetic latch” technology, the Watch Dog secures its ON/OFF positions without current draw and requires over 80G of force to mechanically separate the contacts. The Watch Dog has some of the highest International Protection ratings of IP67 and IP69K—ensuring the strongest protection against dust and moisture. The Watch Dog has built-in programmable time delay settings and a manual emergency toggle switch with a system status LED indicator.

Part No.FR1057
Max Continuous Current300 Amps
Max Surge Current1,000 Amps (30 seconds) / 2,000 Amps (5 seconds)
Environmental Protection RatingIP67 and IP69K (water pressure cleaning)
Water ResistantYes
Operating Temperature Range-40°C to +85°C / -40°F to +185°F
Contact TerminalsSilver-Plated Copper with Silver Pads
Contact HardwareNickel-Plated Brass
Automatic Shut-OffYes
Battery Disconnect ModePositive and Negative
Corrosion ResistanceSalt Spray Test: 300h
Internal ContactsSilver-Plated Copper with Silver Pads
Manual Emergency Shut-OffYes
Terminal Covers IncludedYes
Terminal DiameterM10
Terminal Length0.670" (approx. 43/64 in.)
Tightening Torque (M10 Nuts)14 ft. lbs. (+/- 1 ft. lbs.)
Time DelayYes, programmable for 30 sec, 1 min, 3 min, or 6 min disconnection delay

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Watch Dog Automatic Battery Disconnect Safety Switch


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  • Product Disclaimer >

    Flaming River warrants its products to be free from defects in material and workmanship for a period of one (1) year after the date of purchase. The Big Switch FR1044, FR1046 and FR1047 are warranted for a period of three (3) years from the date of purchase. Provided that it is not mounted with a steel bracket and provided further that it is adequately protected from environmental conditions. All electrical products other than the Big Switch are warranted for a period of ninety (90) days from the date of purchase. Flaming River’s warranty liability is limited to the replacement of defective products. Flaming River is not liable for any labor costs associated with any warranty claim, or for any incidental or consequential damages. Improper installation, abuse, racing, and/or modification of the products void this warranty. No warranty or merchantability or fitness for a particular purpose is made by Flaming River with respect to any of its products.

    DISCLAIMER: It is the customer’s responsibility to determine the suitability of a given Flaming River product for the customer’s uses. Likewise, it is the customer’s responsibility to install a Flaming River product. Contact the vehicle manufacturer whenever installing a switch to confirm the appropriateness of using such a switch and the recommended placement of the switch on the vehicle. Be aware that the installation of certain Flaming River products may adversely impact a manufacturer’s warranty with respect to certain vehicles and other manufactured goods. Flaming River will repair or replace any product found to be defective in material or workmanship. Improper installation, abuse, racing and/or modification VOID WARRANTY. Flaming River is not responsible for any labor costs associated with any warranty.

    Note: Terminals on battery disconnect switches are live parts of the electrical system and should be treated just like battery terminals Covers are recommended, but not included, for each kit. Contact your vehicle’s manufacturer to determine proper placement and suitability.

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International Customers, please order by phone: 440-826-4488

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