Multi-Deck Rotary Switches
MILITARYQUALIFIED
following pages. Standard variations such as
terminals,shaftand/orbushinglengthetc.,which
do not affect performance, can be marked as
qualified product. ꢁdjustable stops cannot be
qualified. Contact Grayhill for details about
variations.
specifically SR04-2. Unsealed switches are
qualified for -65°C to 85°C in 30°, 36°, 45°, 60°
Single Shaft Switches
The military styles of the single shaft Series 42 and 90° throws. The standard and military
and 44 rotary switches are qualified to MIL-ꢀTL- styles of the concentric switches have the
3786/4, specifically SR04-1. Qualification same dimensions with the exception of the
includes two temperature ranges. Unsealed location of the 3 pole common (see circuit
styles M, MB, MG and MBG are qualified for -65 diagrams).The30°and36°throwsaredescribed
to 85°C. Unsealed styles H, HB, HG and HBG, in the ordering information. If the 45°, 60° and
plussealedstylesHS, HBS, HGSandHBGSare 90° throws are required, they can be provided in
qualifiedfor-65°Cto125°C.Qualificationincludes Section ꢁ of the Series 54 Rotary Switches; see
low level switching and shaft grounding as Standard Options, page J-9.
Military qualified switches may be ordered by
the military M number listed in MIL-ꢀTL-3786/4
or by the Grayhill part number. They will be
marked to specifications.
specifiedinMIL-ꢀTL-3786.Qualificationincludes
30°, 36°, 45°, 60° and 90° angles of throw with
solder lug terminals. The military styles are
dimensionally the same as the standard styles
withtwoexceptions. Thelocationofthecommon
forthe3-poleswitchdiffers(seecircuitdiagrams)
and the non-turn tab for styles HS, HBS, HGS
and HBGS differs per the Shaft and Panel Seal
description following.
Add-A-Pot Switches
The military style of the add-a-pot Series 54
switchisqualifiedtoMIL-ꢀTL-3786/4,specifically
MILITARY QUALIFIED SHAFT AND
PANEL SEAL:
SR04-3. These unsealed switches are qualified Styles HS, HBS, HGS and HBGS
for -65°C to 85°C in 30°, 45°, 60° and 90° throws.
The dimensions of the military style add-a-pot
switches are not the same as the standard add-
a-pot switches; see drawings.
The shaft is sealed to the bushing by an internal
O-ring per MIL-P-5516B. The bushing is sealed
to the panel with a silicone rubber washer and a
stainless steel backing washer. The combined
uncompressed thickness is 0.055" (1,40). Since
this switch has a flat cover, a non-turn washer is
supplied (see Panel Seal Kit). If using it, mount
it in front of the panel.
Two Switches, Concentric Shafts
The M style of the concentric shaft Series 43
and54switchesisqualifiedtoMIL-ꢀTL-3786/4,
All Qualified Switches
Complete electrical ratings and characteristics
forallofthesequalifiedswitchesarelistedonthe
SPECIFICATIONS:
Electrical Ratings
StandardStyle
Rating based on the following criteria:
Overload: 50 operations at 150% rated ꢁC Voltage and Load: ꢁs listed in the chart
load One cycle is 360° rotation and a return
Endurance: 6000 operations at the rated load through all switch positions to the starting
with 1000 Vac dielectric strength before and position. The data for the curves was
before make)
Rated: To make and break the following
loads:
Angle of Throw
45° or 60° 90°
30° or 36°
1 amp
1 amp
0.25 amp
0.02 amp
after test
measuredatsealevel, 25°Cand68%relative
115 Vac resistive
6-28 Vdc resistive
115 Vac inductive
115 Vdc inductive
5 amps
1 amp
2 amps
—
5 amps
2 amps
2 amps
—
Temperature Rise: Not to exceed 30°C when humidity.
carrying rated ꢁC load after test.
Note: all dimensional drawings for the standard The Series 42, 43, 44 and 54, style M, H and
style Series 42, 43, 44 and 54 also apply to HS switches are made to meet requirements
theseswitches,withtheexceptionthatswitches ofMIL-ꢀTL-3786,styleSR04.ꢀiallylphthalate
6-28 Vdc inductive 0.10 amp
115 Vdc resistive 0.10 amp
To carry 10 amps continuously.
—
—
—
—
are marked per specifications.
molded parts and the design of internal
switching elements provide exceptional
performance.
Contact Resistance: 50 milliohms maximum
Insulation Resistance: 1,000 megaohms
minimum
Electrical Ratings
Military Style
General Rating: This rating is based on
standard Grayhill tests of the Military style
switchdoneatambientconditions. Itisprovided
for comparison to the Standard Style switch.
Charts shown for non-shorting contacts (break
Voltage Breakdown: 1,000 Vac initially (500
Vac or better after most environmental tests)
LifeExpectancy:100,000mechanicalcycles
of operation. Note: ꢁctual life is determined
by a number of factors, including electrical
loading, rate of rotation and environment, as
wellasmaximumvoltagebreakdownrequired
at the end of life.
Curves shown are typical load-life curves for
Series 42, 43, 44 and 54, style M, H and HS
switches with 30° or 36° angles of throw.
Theyshowthenumbersofcyclesofrotational
life expectancy for the types of loads shown.
Thus, with a 5 amp, 115 Vac resistive load,
10,000 cycles of life is expected. If the load
is reduced to 3 amps, life is increased to
25,000 cycles. The larger angles of throw
(45°, 60° or 90°) switch larger currents for a
like number of cycles.
7
6
5
4
3
2
1
0
VOLTꢁGE 115 VꢁC
RESISTIVE
UL Recognition–
Styles UA, UD, UM, UP, US and USP
Grayhill styles ꢁ and M and their variations
(ꢀ, P, S and SP) of the Series 42, 43, 44 and
54 rotary switches have been tested by
Underwriters Laboratories. The letter U in the
style indicates proper marking as required by
Underwriters Laboratories. These switches
are recognized under file number E35289.
The UL rating for the Series 42, 43, 44 and 54
is as follows:
Life limiting or failure criteria for these curves
are:
0
10
25
50
ContactResistance:50milliohmsmaximum
Insulation Resistance: 1,000 megaohms
minimum between mutually insulated parts
Voltage Breakdown: 1,000 Vac minimum
between mutually insulated parts. These
switches will carry 10 amps with maximum
contact temperature rise of 20°C. Life can be
predicted by Grayhill if less critical life
characteristics, elevated temperature or
reduced pressure is involved.
CYCLES x 1,000
1.7
1.5
1.2
1.0
.75
.50
.20
0
VOLTꢁGE 30 VꢀC
RESISTIVE
INꢀUCTIVE
ElectricalParameters:styleUꢁ=1.0ampere
at 125 Vac. Style UM = 1.0 ampere at 125 Vac
and also .5 ampere at 125 Vac, inductive
load, 0.75 to 0.8 power factor.
(2.8 HENRIES)
0
10
25
50
CYCLES x 1,000
Rotary
28
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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