Brochure

Battery Isolators
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Start every time with Vanner heavy-duty battery isolators!
Vanner Battery Isolator Applications
Ambulances Coaches
Tour Buses RVs and Motor Homes
Fire/Rescue Vehicles Heavy-duty Trucks
Utility and Construction Vehicles Off-road Equipment
Renewable Energy Systems Boats
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Experience the Power.
Battery Isolators in Operation
Vanner battery isolators allow dual batteries to be charged from a single power source such as an
alternator or battery charger. Due to the isolator’s ability to pass current in only one direction, your
first battery can be discharged without draining power from the second battery.
For example, a typical vehicle system may use one battery dedicated to the engine (starter, ignition,
etc.) And the other battery dedicated to a DC to AC inverter. With the engine running, the
alternator will supply charging current to both batteries. With the engine off, the DC to AC inverter
could continue to operate, discharging the second battery. With a battery isolator operating in the
system, the power would not be taken from the engine’s battery, keeping it fully charged.
Vanner manufactures both silicon and Schottky type battery isolators. Both
types utilize a special heat sink design for excellent heat dissipation and
heavy-duty wiring terminals. Schottky battery isoltors are designed to reduce
the voltage drop across the isolator’s terminals, allowing a higher voltage, or
charge, to be delivered to the battery. This is desirable in many vehicles
where more power is required, and is mandated on ambulances that must
meet the GSA’s specification KKK-1822-D. Vanner battery isolators operate
on both 12 and 24 volt DC electrical systems.
Silicon or Schottky Diode?
As current passes through an isolator, the diode type affects the voltage loss
across it. A Schottky diode reduces the loss by one-half of a typical silicon
diode.
Emergency Vehicle Applications
To prevent voltage spikes and surges caused by turning the battery switch off
while the engine is running, please follow the GSA recommended wiring
diagram on the reverse side. Vanner model 52-75 has been designed to
meet the requirements for the 12 Vdc medical outlets stated in section
3.7.7.3 of the GSA specification KKK-A-1822D.
Vanner Battery Isolator Specifications
Model Number: 50-140 51-140 52-75
Description Silicon 2-leg isolator Schottky 2-leg isolator Schottky 1-leg
negative ground medical isolator
Max. Amperage 180 amps/Alternator 250 amps/Alternator 75 amps
165 amps/Leg 200 amps/Leg
Dimensions HxWxD 2.5” x 4.5” x 8” 2.5” x 4.5” x 8” 2.5” x 4.5” x 3”
Weight 3 lbs. 3 lbs. 1.5 lbs.