Specifications

51-902 (Replaces the 51-302)
LEVER OPERATED 6-36 VDC
180 AMPS CONTINUOUS CAPACITY
1000 AMPS IN RUSH
S.P.S.T. (OFF-ON) TWO STUD
TERMINALS
For battery circuit only. Does not
disconnect alternator or generator field
circuit. On vehicles equipped with
alternators/engine must be shut off to avoid
potential damage to alternator diodes.
(See 51-904)
SWITCHES
 Individually Sealed Contacts
 One piece die-cast housing sealed with
O-rings at base and mounting stem to
keep out dust and moisture.
 Large die-cast, lever for ease of operation.
 Two 3/8" copper alloy stud terminals
with hex nuts and lock washers.
 Overall length 4 3/8". Diameter 2 5/8"approx.
 Conforms to requirements of U.L. #558
 Mounting stem 3/4" diameter, 1/2" long, with
two hex nuts and lock washer.
(Note: Mounting nuts not to exceed
12 ft. lbs. torque).
 Designed for protection against battery
drain, electrical fires, tampering and theft.
 Fits panels up to 1/4" thick.
51-915 (Replaces the 51-315)
Same as 51-902 except with .25
anti-rotation indexing post.
51-916 (Replaces the 51-316)
Same as 51-915 except with two
encapsulated removable keys.
51-927 (Replaces the 51-307)
MASTER DISCONNECT SWITCH.
Continuous Rating (Make Break) = 180
AMPS @ 12VDC Intermittent Rating
(Carrying Current Only) = 1800 AMPS @
12VDC. 1 cycle = 4 seconds ON/20 Minutes
OFF, Silver Plated 1/2" - 20UNF Copper
Studs. Recommended wire size #00-gauge or
larger for 1800 AMP
application
.
51-927
35
51-902
51-915
51-916
BRIGHT ZINC
DIE- CAST LEVER
AND MOUNTING
NUTS
STEEL
ANTIROTATION
WASHER
ONE PIECE ZINC DIE-CAST BODY PROVIDES
THE ULTIMATE IN STRENGTH AND
RELIABILITY
HIGH IMPACT PLASTIC
TERMINAL PLATE W/
WEATHERPROOF SEAL
#10-32 THREAD
BRASS STUD
SOLID COPPER
STUDS ALSO
AVAIL. 3/8”-24
THREAD OR
½”-20 THREAD
SPLIT LOCKWASHER
INDIVIDUALLY SEALED
CONTACTS
BRASS RETAINING
NUTS
BATTERY MASTER DISCONNECT
SWITCHES
Master disconnect switches designed for 12
VDC vehicles (Truck, Automotive, Marine,
RV) to disconnect all circuitry to reduce
possibility of theft or accidental electrical
fires. Available in keyed or lever versions,
with or without indexing pins, and various
sizes of terminal studs.
OUR NEW ENCAPSULATED “REMOVABLE KEY” VERSION
OFFERS THE ULTIMATE IN SECURITY AND EASE OF
OPERATION (Anti-Rotation Pin Version, also available)
WEATHER RESISTANT
O-RING NECK SEAL
HIGH RELIABILITY
MAKE/BREAK
CONTACT DESIGN
SECONDARY IGNITION
CIRCUIT FEATURE
AVAILABLE
HEAVY PLATED
STEEL NUTS AND
LOCKWASHER
See page 36 for accessories.