Specifications

 Incorporated silver plated contacts.
 One piece die-cast housing sealed with O-rings at
base and mounting stem to keep out dust and
moisture.
 Two 3/8" and two #10-32 copper alloy stud
terminals with hex nuts and lock washer.
 Overall length 4 1/8”. Diameter 2 5/8” approx.
 Fits panels up to 1/4” thick.
(Note: Mounting nuts not to exceed
12 ft. lbs. torque).
51-919 (Replaces the 51-319)
Same as 51-918 except with two
encapsulated keys.
51-904
36
51-918
51-308 KIT
Replacement Zinc Die-Cast lever
and Zinc Plated set crew for
Pollak
®
Master Disconnect
Switches.
51-919
51-904 (Replaces the 51-304)
LEVER OPERATED - 6-36 VOLT
D.P.S.T. (OFF-ON FOUR STUD TERMINALS)
For battery and alternator or generator field circuit.
Designed to break alternator generator circuit prior
to battery circuit disconnect.
Master Disconnect
Switch
Starter Switch
Battery
Starter
ACCESSORIES
51-303
FACE PLATE - For use with
#'s 51-902,51-905, 51-904,
51-907 Master Disconnect
Switches. Polished aluminum
with black letters. 2.5”
diameter., .76 diameter center
hole, .032 thick.
Master Disconnect
Switch
Starter Switch
Battery
Starter
F A OR B
*Regulator
B F A
Generator
or
Alternator
WIRING DIAGRAM FOR S.P.S.T.
MASTER DISCONNECT SWITCH
WIRING DIAGRAM FOR D.P.S.T. MASTER DISCONNECT SWITCHES.
FOR USE WITH ALTERNATOR OR GENERATOR SYSTEMS
Part Numbers: 51-302, 51-315, 51-316, 51-307
GR.
GR.
Part Numbers: 51-304, 51-318, 51-319
NOTE: Hex nuts against base Must remain stationary and
Must
not be tightened or loosened. Secure power cables to
mounting
surface no greater than 10” from switch mounting
RATING:
Continuous Rating (Make Break)
Large Studs – 180 Amps
Small Studs – 20 Amps
Intermittent Rating (Carrying)
Large Studs – 1000 Amps (20 sec. “On”
-5 Minutes “Off”
51-918 (Replaces the 51-318)
Same as 51-904 except with .25” diameter
anti-rotation indexing post.
51-322
FACE PLATE - For use with #'s
51-915, 51-916, 51-917, 51-918,
Master Disconnect Switches.
Polished aluminum with black
letters. 2.5” diameter, .76”
diameter post, .032” thick.
51-311
Special flange plate
and lever to accept a
padlock for many lock-
out/tag-out safety
regulations.
31-332
Encapsulated Keys with Pollak
®
logo. Fits #’s 51-916 & 51-919
Disconnect Switches.