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44A45-05-1-07N

Multi-Deck Rotary Switches

Grayhill Inc 

Multi-Deck Rotary Switches

specifications:

Style M switches, at 85°C, approximately 68%

humidity and sea level pressure and style H

and HS at 125°C have been tested to make

and break the following loads as stated in

MIL-DTL-3786/SR04; 250 milliamperes at

28 Vdc resistive, 100 milliamperes at 28 Vdc

inductive (2.8 henries); 75 milliamperes at 115

Vac resistive.

These switches have also been tested at

reduced barometric pressure (70,000 feet),

25°C at approximately 68% relative humidity to

make and break the following loads as stated

in MIL-DTL-3786/SR04; 200 milliamperes,

28 Vdc resistive; 25 milliamperes, 28 Vdc

inductive (2.8 henries); 20 milliamperes, 115

Vac resistive. When tested to these loads and

conditions the style M, H and HS switches

meet the following life limiting or failure criteria

after 25,000 cycles in accordance with MIL-

S-3786.

Contact Resistance: 50 milliohms

maximum

Insulation Resistance: 1,000 megaohms

minimum between terminals and shafts

Dielectric Strength: 1,000 Vac (atmospheric

pressure) and 450 Vac (reduced pressure)

minimum between mutually insulated parts.

When tested at sea level 25°C and 68% relative

humidity with failure criteria of 50 milliohms

max. and 750 Vac breakdown voltage, these

switches will make and break the following

loads:250 mA at 28Vdc, inductive (2.8 henries);

1.25 amps at 28 Vdc resistive; 2.0 amps at 115

Vac, 60 Hz resistive, for 10,000 cycles.

Materials and Finishes

Standard Style

Bases: Melamine per (MIL-M-14) ASTM-D-

5948

Cover, Deck Separators, End Plate and Rotor

Mounting Plate: Phenolic per (MIL-M-14)

ASTM-D-5948

Mounting Bushings: Brass, tin/zinc-plated.

Shaft, Cover Plate, Retaining Rings,Through

Bolts, Shaft Extensions, Stop Arm, Thrust

Washers Stop Washers and Rear Support

Plate: Stainless Steel

Detent Balls: Steel, nickel-plated

Detent Springs: Tinned music wire

Rotor Contact, Stator (Base) Contacts:

Silver alloy

Terminals (Except Common): Brass, tin

plated

Common Plate, Including Solder Lug: Brass,

silver-plated .0003" minimum

Mounting Hardware: Two mounting nuts .094"

(2,39) thick by .562" (14,27) across flats and

one internal tooth lockwasher are supplied with

each switch.

Stud Nuts, Mounting Nuts, Lock Washers:

Tin/zinc-plated or stainless steel.

Materials and Finishes

Military Qualified

Bases: Diallyl per (MIL-M-14) ASTM-D-5948

Cover, Deck Separators, End Plate and

Rotor Mounting Plate: Diallyl per (MIL-M-14)

ASTM-D-5948

These switches also meet MIL-DTL-3786/

SR04 for moisture resistance, medium and

high shock, vibration (10 to 2000 cps), thermal

shock (-65°C to 125°C), salt spray, explosion

and terminal pull.

Mounting Bushings: Brass, tin/zinc-plated.

Shaft, Cover Plate, Retaining Rings,

Through Bolts, Shaft Extensions, Stop Arm,

Stop Washers, Thrust Washers and Rear

Support Plate: Stainless steel

Detent Balls: Steel, nickel-plated

Detent Springs: Tinned music wire

Rotor Contact: Silver alloy

Terminals, Common Plate including Solder

Lug: Brass, silver-plated .0003" minimum

Mounting Hardware: Two mounting nuts .094"

thick by .562" across flats and one internal tooth

lockwasher are supplied with each switch.

Stud Nuts, Mounting Nuts, Lock Washers:

Tin/zinc-plated or stainless steel.

Additional Characteristics

Standard Style and Military Qualified

Contact: Shorting or non-shorting wiping

contacts with over 150 grams of contact

force

Rotational Torque: 8-115 ounce-inches

depending upon the number of poles per deck,

number of decks and angle of throw

Mechanical Life Expectancy: 100,000 cycles

of operation

Shaft Flat Orientation: Flat opposite

contacting position of pole number one (See

circuit diagram).

Stop Strength: For Standard style: 15 pound-

inches minimum. For Adjustable stop styles:

12 pound-inches

Extended Stud: Single shaft switches of six or

more decks and concentric shaft switches of a

combination of five or more decks (Standard

style) or four or more decks (Military style)

have longer studs with extra mounting nuts for

recommended double end mount.

Grayhill, Inc. • 561 Hillgrove Avenue • LaGrange, Illinois 60525-5997 • USA • Phone: 708-354-1040 • Fax: 708-354-2820 • www.grayhill.com

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