Product Datasheet 75920 SERIES MASTER BATTERY DISCONNECT SWITCHES 400A SPST IP68 Integrated lockout tag-out Specifications Operating Voltage: 6V min, 36V max Continuous Current: 12V: 400A max (single 4/0 cable) 24V: 300A max 75920-01 36V: 200A max Intermittent Current: 12 V : 1 000 A 90 sec on, 5 min off 12 V : 1 5 0 0 A 60 sec on, 5 min off 75920 12 V : 20 0 0A 30 sec on, 5 min off Description 12 V : 3 000 A The 75920 Master Battery Disconnect switch is designed 15 sec on, 5 min off to protect service personnel and your vehicle systems. The Operating Temp: -40 to +85 C switch protects vehicles from both battery drain and theft as Ingress Protection: IP68 well as allowing service personnel to lock-out tag-out. It also Corrosion Test: 96 hours - salt spray test serves as an effective emergency power cutoff. to ASTM standard Features/Benefits Vibration and Shock Test: SAE J1455 Mounting Stem: Threads: 3/4 -16 High amperage capacity: 400A with single 4/0 cable Max Torque: 18 ft-lbs (24.4 Nm) Can be used in high side or low side applications Knob Retention Screw Torque: 7.0 in-lbs +/- 2.0 in-lbs Waterproof and dustproof to IP68 - switch can be 0.79 Nm +/- 0.23Nm mounted in exposed locations Composite engineered polymer housing will not rust or Applications corrode. Tested per SAE 1455 for salt, calcium chloride Heavy Truck Mining and magnesium chloride Off-Road Agricultural Large red or yellow knob is easy to operate with gloves 90 switch travel makes it easy to identify Emergency Vehicles Marine the switch position Material Handling Construction Large divider on base prevents accidental shorting of high energy cables Web Resources Fits standard Master Disconnect mounting pattern Download installation instructions, 2D prints and technical resources at: littelfuse.com/75920 Ordering Information PART NUMBERS BATTERY TERMINAL SWITCH POSITION SYMBOLS BULK BOXED RETAIL THREADS TORQUE MATERIAL 75920 75920-BX 75920-BPO -Of 3/8-24 70-90in-lbs (8-10 Nm) Copper 75920-01 O -Of 3/8-24 70-90in-lbs (8-10 Nm) Copper 75920-03 On - Off 3/8-24 70-90in-lbs (8-10 Nm) Copper 75920-05 75920-05-BX I - O 3/8-24 70-90in-lbs (8-10 Nm) Copper 75920-10 75920-10-BX On - Off 3/8-24 70-90in-lbs (8-10 Nm) Copper 75921-02 On - Off M10x1.5 70-90in-lbs (8-10 Nm) Copper 75921-10 75921-10-BX I - O M10x1.5 70-90in-lbs (8-10 Nm) Copper Need a custom version This product can be made available with a custom knob and bezel design. Please contact your sales rep to discuss lead time and minimum order requirements. Datasheet Replaces Hotfeed Number D-618 1 of 2 littelfuse.com 2021 Littelfuse Commercial Vehicle Products Rev: 030821-BProduct Datasheet 75920 MASTER BATTERY DISCONNECT SWITCH SERIES Dimensions in inches (millimeters) 75920 1.69 42.9 0.326 8.28 2.72 69.1 2.75 69.9 2.59 65.8 0.200 5.08 0.450 11.43 1.375 34.93 0.900 22.86 0.47 11.9 2.28 58.0 MOUNTING 0.250 6.35 0.812 20.62 PATTERNS 0.750 19.05 0.312 7.92 0.670 17.02 0.812 20.62 0.813 20.64 1.000 25.40 MOUNTING STEM, 3/4-16 0.812 20.62 0.312 7.92 0.670 17.02 75921 Datasheet Replaces Hotfeed Number D-618 2 of 2 littelfuse.com 2021 Littelfuse Commercial Vehicle Products Rev: 030821-B