MILITARY - ENVIRONMENTALLY SEALED SWITCHES
Series - 8503, 8504, 8505
MIL-DTL-3950 Lever Lock Switches
Features
•
•
•
•
•
SPECIFICATIONS
Environmentally sealed
1, 2 and 4 pole circuitry
2 & 3 position with
maintained and momentary action
Locking actuator for safety
Molded-in terminal inserts and
terminal numbers
•
•
•
•
•
•
CURRENT RATINGS
Environmentally sealed per MIL-DTL-3950
MS approved and QPL'd per MIL-DTL-3950
Thermoset molding materials meet
flame retardant requirements
Bushing: 15/32" - 32 thread
Temperature Range: -85°F to +160°F
(-65°C to +71°C)
Life: 20,000 operations at rated load
40,000 operations mechanical life
No. of Catalog Type of
Poles Number Operation
115 VAC
60 or 400Hz
28VDC
Lamp Resistive Inductive Lamp Resistive Inductive
Load
Load
Load
Load Load
Load
1
8503
2
8504
4
8505
Maintained
5
Momentary
4
Maintained
7
Momentary
5
Maintained
Momentary
20
15
3
15
10
15
10
2
15
7
20
15
4
15
15
18
10
2
11
8
5
20
12
4
15
15
4
18
10
2
11
8
Minimum Rating: “Intermediate Current” per MIL-DTL-3950.
LEVER LOCK SELECTION TABLE
Circuit with Lever in . . .
Up
Position
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
* ON
* ON
* ON
NONE
ON
OFF
ON
ON
ON
ON
Center
Position
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
NONE
NONE
NONE
NONE
NONE
NONE
OFF
OFF
OFF
OFF
NONE
OFF
OFF
OFF
OFF
NONE
NONE
OFF
OFF
OFF
OFF
Down Position
(Keyway)
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
ON
ON
ON
NONE
NONE
NONE
NONE
ON
*
ON
*
ON
*
ON
*
ON
*
OFF*
ON
*
ON
*
ON
*
ON
*
ON
*
Lever
Lock
Bushing
Style
A
B
D
E
F
G
H
J
K
L
M
N
P
D
F
G
D
F
G
E
F
K
M
F
E
L
N
E
F
F
E
F
K
L
8505
8504
8503
One Pole
Two Pole
Four Pole
Flush Screw Terminals
Flush Screw Terminals
Flush Screw Terminals
MS Part
Number
Catalog
Number
MS24658-21A
8503K1
-21B
K27
-21D
K5
-21E
K2
-21F
K28
MS24658-21G
8503K3
-21H
K29
-21J
K30
-21K
K31
-21L
K32
MS24658-21M
8503K33
-21N
K4
-21P
K34
-22D
K10
-22F
K35
MS24658-22G
8503K9
-23D
K6
-23F
K36
-23G
K7
-24E
K16
MS24658-24F
8503K37
-24K
K38
-24M
K11
-26F
K20
MS24658-27E
8503K12
-27L
K39
-27N
K14
-28E
K15
-29F
K21
MS24658-30F
8503K19
-31E
K18
-31F
K40
-31K
K41
-31L
K13
MS Part
Number
MS24659-21A
-21B
-21D
-21E
-21F
MS24659-21G
-21H
-21J
-21K
-21L
MS24659-21M
-21N
-21P
-22D
-22F
MS24659-22G
-23D
-23F
-23G
-24E
MS24659-24F
-24K
-24M
-26F
MS24659-27E
-27L
-27N
-28E
-29F
MS24659-30F
-31E
-31F
-31K
-31L
Catalog
Number
MS Part
Number
8504K1
K27
K5
K2
K28
8504K3
K29
K30
K31
K32
8504K33
K4
K34
K10
K35
8504K9
K6
K36
K7
K16
8504K37
K38
K11
K20
8504K12
K39
K14
K15
K21
8504K19
K18
K40
K41
K13
MS24660-21A
-21B
-21D
-21E
-21F
MS24660-21G
-21H
-21J
-21K
-21L
MS24660-21M
-21N
-21P
-22D
-22F
MS24660-22G
-23D
-23F
-23G
-24E
MS24660-24F
-24K
-24M
-26F
MS24660-27E
-27L
-27N
-28E
-29F
MS24660-30F
-31E
-31F
-31K
-31L
Catalog
Number
8505K1
K27
K5
K2
K28
8505K3
K29
K30
K31
K32
8505K33
K4
K34
K10
K35
8505K9
K6
K36
K7
K16
8505K37
K38
K11
K20
8505K12
K39
K14
K15
K21
8505K19
K18
K40
K41
K13
* Momentary contact.
Indicates direction against which lever is locked.
See page A71 for circuit diagrams.
Reference bushing styles on page A26.
SAFRAN ELECTRICAL & POWER
“Safran Electrical & Power Proprietary Information. Information contained in this document is Safran Electrical & Power Proprietary Information and is disclosed in confidence. It is the property
of Safran Electrical & Power and shall not be used, disclosed to others, or reproduced without the express written agreement of Safran Electrical & Power. If consent is given for reproduction in
whole or in part, this notice set forth on each page of this document shall appear in any such reproduction in whole or in part. Unauthorized export or re-export is prohibited.”
A23
MILITARY - ENVIRONMENTALLY SEALED SWITCHES
Series - 8503, 8504, 8505
MIL-DTL-3950 Lever Lock Switches
LEVER LOCK SELECTION TABLE, CONT'D
Circuit with Lever in . . .
Up
Position
ON
ON
* ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
* ON
* ON
* ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
* ON
* ON
* ON
ON
Center
Position
OFF
OFF
ON
ON
Down Position
Lever
(Keyway)
Lock
Bushing
Style
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON-OFF
ON
*
ON
*
NONE
NONE
NONE
NONE
NONE
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON*
ON*
ON*
ON*
ON*
ON*
ON*
ON*
ON*
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON*
ON*
ON*
ON*
ON*
ON*
ON*
ON*
ON*
ON
M
N
E
E
F
K
M
A
B
D
E
F
G
H
J
K
L
M
N
P
E
F
K
L
M
N
E
L
N
A
B
D
E
F
G
H
J
K
L
M
N
P
E
F
K
L
M
N
E
L
N
B
8505
8504
8503
One Pole
Two Pole
Four Pole
Flush Screw Terminals
Flush Screw Terminals
Flush Screw Terminals
MS Part
Number
MS Part
Number
MS Part
Number
Catalog
Number
MS24658-31M
-31N
-32E
-33E
-33F
MS24658-33K
-33M
—
—
—
8503K17
K8
K23
K24
K25
8503K26
K42
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
MS24659-31M
-31N
-32E
-33E
-33F
MS24659-33K
-33M
MS27408-1A
-1B
-1D
MS27408-1E
-1F
-1G
-1H
-1J
MS27408-1K
-1L
-1M
-1N
-1P
MS27408-2E
-2F
-2K
-2L
-2M
MS27408-2N
-3E
-3L
-3N
-4A
MS27408-4B
-4D
-4E
-4F
-4G
MS27408-4H
-4J
-4K
-4L
-4M
MS27408-4N
-4P
-5E
-5F
-5K
MS27408-5L
-5M
-5N
-6E
-6L
-6N
-7B
Catalog
Number
8504K17
K8
K23
K24
K25
8504K26
K42
K43
K44
K45
8504K46
K47
K48
K49
K50
8504K51
K52
K53
K54
K55
8504K56
K57
K58
K59
K60
8504K61
K62
K63
K64
K65
8504K66
K67
K68
K69
K70
8504K71
K72
K73
K74
K75
8504K76
K77
K78
K79
K80
8504K81
K82
K83
K84
K85
K86
K87
Catalog
Number
8505K17
MS24660-31M
K8
-31N
K23
-32E
K24
-33E
K25
-33F
8505K26
MS24660-33K
K42
-33M
K43
MS27409-1A
K44
-1B
K45
-1D
8505K46
MS27409-1E
K47
-1F
K48
-1G
K49
-1H
K50
-1J
8505K51
MS27409-1K
K52
-1L
K53
-1M
K54
-1N
K55
-1P
8505K56
MS27409-2E
K57
-2F
K58
-2K
K59
-2L
K60
-2M
8505K61
MS27409-2N
K62
-3E
K63
-3L
K64
-3N
—
—
—
—
—
—
—
—
—
—
—
—
* Momentary contact.
Indicates direction against which lever is locked.
See page A71 for circuit diagrams.
Reference bushing styles on page A26.
A24
SAFRAN ELECTRICAL & POWER
“Safran Electrical & Power Proprietary Information. Information contained in this document is Safran Electrical & Power Proprietary Information and is disclosed in confidence. It is the property
of Safran Electrical & Power and shall not be used, disclosed to others, or reproduced without the express written agreement of Safran Electrical & Power. If consent is given for reproduction in
whole or in part, this notice set forth on each page of this document shall appear in any such reproduction in whole or in part. Unauthorized export or re-export is prohibited.”
MILITARY - ENVIRONMENTALLY SEALED SWITCHES
Series - 8503, 8504, 8505
MIL-DTL-3950 Lever Lock Switches
MOUNTING DIMENSIONS - ONE POLE / 8503
.076
[1,93]
.432
[10,97]
KEYWAY
.420 DIA.
[10,67]
33°
.470
[11,94]
1.05 [26,6]
LOCKED
1.14 [28,6]
UNLOCKED
16.5°
.250
[6,35]
1.18
MAX
[29,9]
15/32-32 UN-2A
THREAD TO WITHIN
.060 [1,52] OF SHOULDER
.635
MAX
[16,13]
3
2
1
#6-32 TERMINAL SCREW
WITH INTERNAL TOOTH
LOCKWASHER (SEMS)
.380 .380
[9,65] [9,65]
1.270
MAX
[32,26]
Terminal Identification
90-4354.AI
MOUNTING DIMENSIONS - TWO POLE / 8504
.076
[1,93]
.432
[10,97]
KEYWAY
.420 DIA.
[10,67]
33°
1.05 [26,6]
LOCKED
1.14 [28,6]
UNLOCKED
16.5°
4
5
6
1
2
3
.380
[9,65]
[0,0] = mm
Mounting dimensions for reference only.
.910
MAX
[23,11]
#6-32 TERMINAL SCREW
WITH INTERNAL TOOTH
LOCKWASHER (SEMS)
.130
[3,30]
STANDARD
0.00 = inches
1.370
MAX
[34,80]
1.100
MAX
[27,94]
.250
[6,35]
.130
[3,3]
.470
[11,94]
15/32-32 UN-2A
THREAD TO WITHIN
.060 [1,52] OF SHOULDER
.380 .380
[9,65] [9,65]
1.340 MAX
[34,04]
Terminal Identification
90-4355.AI
Non-functional terminals not supplied.
SAFRAN ELECTRICAL & POWER
“Safran Electrical & Power Proprietary Information. Information contained in this document is Safran Electrical & Power Proprietary Information and is disclosed in confidence. It is the property
of Safran Electrical & Power and shall not be used, disclosed to others, or reproduced without the express written agreement of Safran Electrical & Power. If consent is given for reproduction in
whole or in part, this notice set forth on each page of this document shall appear in any such reproduction in whole or in part. Unauthorized export or re-export is prohibited.”
A25
MILITARY - ENVIRONMENTALLY SEALED SWITCHES
Series - 8503, 8504, 8505
MIL-DTL-3950 Lever Lock Switches
MOUNTING DIMENSIONS - FOUR POLE / 8505
.076
[1,93]
.432
[10,97]
KEYWAY
.420 DIA.
[10,67]
33°
1.05 [26,6]
LOCKED
1.14 [28,6]
UNLOCKED
16.5°
.130
[3,30]
1.370 MAX
[34,80]
1.100
[27,94] MAX
.250
[6,35]
1.30
[3,3]
.470
[11,94]
15/32-32 UN-2A
THREAD TO WITHIN
.060 [1,52] OF SHOULDER
1.660
[42,16] MAX
12
6 9
5
2
3
1
.370 .370 .370
[9,40] [9,40] [9,40]
4 7
8
10
11
#6-32 TERMINALSCREW WITH INTERNAL
TOOTH LOCKWASHER (SEMS)
.380 .380
[9,65] [9,65]
1.340 MAX
[34,04]
90-4356, 5199, 5200
Terminal Identification
Non-functional terminals not supplied.
LEVER LOCK - BUSHING STYLES
OPTIONS/ACCESSORIES
A
B
D
E
F
G
H
LOCKED IN 3
POSITIONS
LOCKED IN
CENTER AND
IN KEYWAYSIDE
LOCKED OUT
OF CENTER
POSITION
LOCKED IN
CENTER
POSITION
LOCKED
IN SIDE
OPPOSITE
KEYWAY
LOCKED IN
KEYWAY
SIDE
LOCKED OUT
OF CENTER
AND KEYWAY
SIDE
J
K
L
M
N
P
LOCKED OUT OF
CENTER AND SIDE
OPPOSITE KEYWAY
LOCKED IN
CENTER AND
SIDE OPPOSITE
KEYWAY
LOCKED
OUT OF
KEYWAY
SIDE
LOCKED OUT
OF AND INTO
SIDE OPPOSITE
KEYWAY
LOCKED OUT
OF SIDE
OPPOSITE
KEYWAY
LOCKED OUT
OF AND INTO
KEYWAYSIDE
Figures A thru P do not represent details of construction. They schematically illustrate locking function.
PANEL CUTOUT DIMENSIONS
LOCKING RING
0.480
DIA. HOLE
[12,19]
STANDARD
0.00 = inches
LOCKING RING
[0,0] = mm
A26
0.480
DIA. HOLE
[12,19]
0.130
[3,30]
KEYWAY
0.062
[1,57]
0.445
[11,30]
Mounting dimensions for reference only.
0.130
[3,30]
KEYWAY SIDE
0.445
[11,30]
0.480
DIA. HOLE
[12,19]
0.375
[9,52]
15/32 DIA. BUSHING
0.480
DIA. HOLE
[12,19]
0.375
[9,52]
• Special mounting hardware
• Mounting hardware furnished
assembled
• Terminal screws furnished assembled
• Substitute sems screws
• Special circuits
• Panel seal, part number 32-341
(See Accessories and Custom
Components section)
• Special shaped caps available
• Custom wiring harnesses
SAFRAN ELECTRICAL & POWER
KEYWAY
0.062
[1,57]
“Safran Electrical & Power Proprietary Information. Information contained in this document is Safran Electrical & Power Proprietary Information and is disclosed in confidence. It is the property
of Safran Electrical & Power and shall not be used, disclosed to others, or reproduced without the express written agreement of Safran Electrical & Power. If consent is given for reproduction in
whole or in part, this notice set forth on each page of this document shall appear in any such reproduction in whole or in part. Unauthorized export or re-export is prohibited.”