Littelfuse, Inc. Datasheets for Disconnect Switches

Disconnect switches rapidly disconnect circuits from power supplies in the event of an emergency.
Disconnect Switches: Learn more

Product Name Notes
FlexMod Timer, with harness -- 48636-01-BX No more dead batteries! FlexMod Timer for Cargo Compartments with Harness (Deutsch-type connector and wires) For 12V or 24V systems. Gives warnings to vehicle operator befor cargo compartment lights are...
FlexMod Timer -- 48636 No more dead batteries! FlexMod Timer for Cargo Compartments. For 12V or 24V systems. Gives warnings to vehicle operator befor cargo compartment lights are turned Off. Four 9/32" (7.2mm) diameter...
FlexMod Low Voltage Disconnect Switch & Harness -- 48610-01-BX FlexMod Low Voltage Disconnect & Harness (Deutsch-type connector and wires). Makes sure your vehicles will always start! 10A at 12V DC Automatically disconnects specified loads when unit senses that vehicle...
FlexMod Dual Output VSRT -- 48742 FlexMod Dual Output Voltage Sensing Relay & Timer No more dead batteries! Controls two outputs, monitors voltage and time on both. Ideal for emergency vehicles and many other applications. Protects...
Battery Selector/Master Disconnect Switch -- M-750
Battery Selector/Master Disconnect Switch -- M-754
Battery Selector/Master Disconnect Switches -- M-754-01
For any vehicle that needs to use two batteries where one battery is used for starting the engine, while the other is used to power auxiliary loads. This is a...
Metric Master Disconnect Switch -- 75921 High amp capacity: 300A Sealed to IP68, ignition-proof Integral lockout Protects vehicles against tampering, theft and battery drain. Protects service personnel from hazards and can be locked-out or tagged-out. Provides...
Master Disconnect Switch -- 75920 High amperage capacity: 300A at 12V DC. Protects vehicles against tampering, theft and battery drain. Protects from hazards during vehicle servicing,and can be locked-out or tagged-out. Provides an effective emergency...
Master Disconnect Switch -- M-284 Long stem. brass case. SPST Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery circuit only. Electrical Ratings (1000A intermittent, 175A continuous.
SureStart Compact Low Voltage Disconnect Switch, & Harness -- 48513-01 LVD & Harness (Deutsch-type connector and wires). No more dead batteries! 12 or 24V, 125A at 60ºC, 100A at 85ºC Electronically senses battery voltage and conserves starting power. Automatically disconnects...
FlexMod LVD (Low Voltage Disconnect Switch) -- 48610 LVD: Makes sure your vehicles will always start! 10A at 12V DC, 12-32V. Automatically disconnects specified loads when unit senses that vehicle battery is too low; automatically reconnects when voltage...
SureStart Low Voltage Disconnect Switch,150A -- 48512 No more dead batteries! 150A at 12V DC Ensures ample starting capacity and prolongs battery life. Automatically disconnects non-critical loads from a battery when the battery voltage falls below a...
SureStart Low Voltage Disconnect Switch, 200A -- 48510 No more dead batteries! 200A at 12V DC Ensures ample starting capacity and prolongs battery life. Automatically disconnects non-critical loads from a battery when the battery voltage falls below a...
SureStart Compact Low Voltage Disconnect Switch -- 48513 No more dead batteries! 12 or 24V, 125A at 60ºC, 100A at 85ºC Electronically senses battery voltage and conserves starting power. Automatically disconnects and reconnects loads based on battery condition;
Programmable LVD -- 48713 No more dead batteries! Programmable LVD (Low Voltage Disconnect Switch) Select distributors can reprogram the LVD to your custom requirements! 12 or 12V autoranging. See 48513 for details
Master Disconnect Switch -- 2484-A SPST Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery circuit only. Electrical Ratings 1000A intermittent, 175A continuous. Same as 2484-16, but without UL label.
Master Disconnect Switch -- 2484-16 SPST Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery circuit only. Electrical Ratings UL Listed 375M: 250A at 6V, 125A at 12V intermittent; 40A at 6V, 20A...
SureStart Compact Magnum LVD & harness -- 48514-01 SureStart Compact Magnum Low Voltage Disconnect Switch & harness 48514 SureStart Compact Magnum Low Voltage Disconnect Switch (without harness). 48514-02 LVD with harness and 58326-01 Rocker Switch The most powerful...
SureStart Compact Magnum LVD -- 48514 SureStart Compact Magnum Low Voltage Disconnect Switch (without harness). 48514-01 LVD and harness 48514-02 LVD with harness and 58326-01 Rocker Switch The most powerful solid-state LVD available! Electronically senses battery...
SureStart Compact Magnum LVD with harness and 58326-06 Rocker Switch -- 48514-02 SureStart Compact Magnum Low Voltage Disconnect Switch with harness and 58326-06 Rocker Switch 48514 SureStart Compact Magnum Low Voltage Disconnect Switch (without harness). 48514-01 LVD and harness The most powerful...
SureStart Compact Magnum Programmable LVD -- 48714 SureStart Compact Magnum Programmable LVD (without harrness) 48714-01 Programmable LVD and harness 48714-02 Programmable LVD with harness and 58326-01 Rocker Switch The most powerful solid-state LVD available! Electronically senses battery...
Master Disconnect Switch -- 75920-05 This item is identical to the 75920, except the black bezel is marked with the international symbols for On and Off. High amperage capacity: 300A at 12V DC. Protects vehicles...
Master Disconnect Switch -- 2484-06 Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery circuit only. Electrical Ratings 1000A intermittent, 175A continuous. With weather resistant with O-ring seal in operating shaft, gasket-sealed terminal...
Master Disconnect Switch -- 2484 Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery circuit only. Electrical Ratings UL Listed 375M: 250A at 6V, 125A at 12V intermittent; 40A at 6V, 20A at...
DPST Master Disconnect Switch -- 75903
DPST Master Disconnect Switch -- 75904
DPST Master Disconnect Switch -- M-290-05
Two positions: Off-On. For 6-36V DC systems. DPST: Will disconnect the battery and the alternator or generator field circuit. Electrical ratings: Large studs: 1000A intermittent. 15 seconds On, 5 minutes...
DPST Master Disconnect Switch -- 75904-01 Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery and the alternator or generator field circuit. Electrical ratings: Large studs: 1000A intermittent. 15 seconds On, 5 minutes Off.
DPST Master Disconnect Switch, 2000A -- 75907 Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery and the alternator or generator field circuit. Electrical ratings: Large studs: 2000A intermittent, 30 seconds On, 3 minutes Off.
Master Disconnect Switch -- 2484-09 Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery circuit only. Electrical Ratings : 1000A intermittent, 175A continuous. Same as 2484-16, but with copper contacts and without UL...
Master Disconnect Switch 50 Amps -- M-288 Two positions: Off-On. Also functions as a two-position universal start switch. Rated at 50A at 14V DC. Mounting stem: 5/8" (15.9mm) diameter, 3/4" (19.1mm) long. Fits panels up to 17/32"...
Master Disconnect Switch, 2000A -- 75908 Two positions: Off-On. For 6-36V DC systems. Disconnects battery circuit only. Electrical rating: 2000A intermittent. 30 seconds On, 3 minutes Off, 300A continuous. Mounting stem: 3/4" -16 thread. Fits panels...
DPST Master Disconnect Switch -- M-289 Two positions: Off-On. For 6-36V DC systems. DPST Will disconnect the battery and the alternator or generator field circuit. Electrical ratings: Large studs: 1000A intermittent. 15 seconds On, 5 minutes...
DPST Master Disconnect Switch for two high current loads -- 75912 Two positions: Off-On. For 6-36V DC systems. DPST Will disconnect the battery and the alternator or generator field circuit. Electrical ratings: 125A continuous, 750A intermittent; 15secs On, 5min Off. Up...
DPST Master Disconnect Switch -- M-290
DPST Master Disconnect Switch -- M-290-01
Two positions: Off-On. For 6-36V DC systems. DPST Will disconnect the battery and the alternator or generator field circuit. Electrical ratings: Large studs: 1000A intermittent. 15 seconds On, 5 minutes...
Master Disconnect Switch -- 2484-02 Two positions: Off-On. For 6-36V DC systems. SPST: Will disconnect the battery circuit only. Electrical Ratings 1000A intermittent, 175A continuous. Mounting stem: Brass, 3/4" -16 thread 17/32" (13.5mm) long. Fits...
Master Disconnect Switch -- 2484-03 Two positions: Off-On. For 6-36V DC systems. SPST:Will disconnect the battery circuit only. Electrical Ratings : 1000A intermittent, 175A continuous. Same as 2484-02, but with O-ring seal in the operating...
Master Disconnect Switch -- M-284-A Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery circuit only. Electrical Ratings (unless noted): 1000A intermittent, 175A continuous. UL Listed 707B: 800A intermittent, 175A continuous. Same as...
Master Disconnect Switch -- M-284-02 Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery circuit only. Electrical Ratings 1000A intermittent, 175A continuous. Same as M-284-01, but with O-ring seal in operating shaft, gasket-sealed...
Master Disconnect Switch -- 2484-19 Weather-resistant. Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery circuit only. Electrical Ratings: 1000A intermittent, 175A continuous. Same as 2484-02, but with gasket-sealed terminal insulator and with...
DPST Master Disconnect Switch -- 75904-02 With two Hencol keys. Two positions: Off-On. For 6-36V DC systems. Will disconnect the battery and the alternator or generator field circuit. Electrical ratings: Large studs: 1000A intermittent. 15 seconds...