MINIATURE POSITIVE ACTION SWITCHES
Series—8855, 8856, 8866-69
MIL-S-8834 Miniature Positive Action Switches
Toggle and Lever Lock/ IWTS Terminals
CURRENT RATINGS
No. of Catalog
Poles Number
Type of
Operation
28 and 50VDC
115VAC 60Hz and 400Hz
(Amperes per pole)
(Amperes per pole)
Resistive
Inductive
Resistive
Inductive
Load
Load
Load
Load
28VDC 50VDC 28VDC 50VDC 60Hz 400Hz 60Hz 400Hz
1
1
1
1
–
–
2
2
3
3
1
1
2
2
FEATURES
• Sealed bushing
• Dry circuit (logic level loads) to power
switching levels
• 1 and 2 pole circuitr y
• Non-teasible mechanism for all but
center “ON” circuit
• Small and large size bushings and
actuators
• Toggle and lever lock actuators
• Wiping action contacts
• Positive make and break action
• Integrated wire termination system
(IWTS)
SPECIFICATIONS
• Bushing seal or bonded seal per MIL-S-8834
• MS approved and QPL listed to MIL-S-8834
• Temperature range: -67°F to +160°F
(-55°C to +71°C)
• Life: 20,000 operations at rated load
40,000 operations mechanical life
• Bushing thread sizes:
Small Toggle: 1/4" – 40 thread
Large Toggle and Lever Lock:
15/32"– 32 thread
• Accepts MIL-C-39029/1-101 Pin
8855
Maintained
8866
and
5
8868
Momentary
2
8856
Maintained
8867
and
5
8869
Momentary
Minimum Rating: 25
µA
at 5 millivolts.
1
SELECTION T ABLE
8868
8866
8869
8867
Lar ge Lever
Small Lever
Lar ge Lever
Small Lever
CIRCUIT WITH LEVER IN...
Up
Position
Center
Position
Down
Position
(Keyway)
MS Part
Number
ONE POLE
TWO POLE
ON
OFF
ON
MS21346-211
MS21347-211
MS2134-711
ON
NONE
OFF
-221
-221
-721
ON
NONE
ON
-231
-231
-731
ON
OFF
NONE
-241
-241
-741
MS21346-271
MS21347-271
MS21347-771
ON
OFF
ON
NONE
OFF
ON
-281
-281
-781
ON
OFF
ON
-311
-311
-811
MS21346-321
MS21347-321
MS21347-821
NONE
ON
ON
ON
ON
ON
–
-331
-831
ON
ON
ON
–
-351
-851
ON
ON
ON
–
-341
-841
Momentary contact.
x
Dielectric per MIL-S-8834 except limited to 1250 volts. Delayed action of the switch toggle lever may cause circuit to close or open before snap action mechanism trips.
y
Furnished with Bonded Seal Feature. (Meets with 15’ head of water level.)
*
*
*
*
*
*
*
*
*
Catalog
Number
Large Lever
Small Lever
8868K51
8866K51
K57
K57
K54
K54
K55
K55
8868K52
8866K52
K56
K56
K53
K53
K58x
K58x
–
–
–
–
–
–
MS Part
Number
Catalog
Number
Large Lever
Small Lever
8869K51
8867K51
K57
K57
K54
K54
K55
K55
8869K52
8867K52
K56
K56
K53
K53
8869K58x
8867K58x
K59x
K59x
K510x
K510x
K511x
K511x
MS Part
Number
Catalo
g
Number
y
8869K51X
K57X
K54X
K55X
8869K52X
K56X
K53X
8869K58Xx
K5 9Xx
K510Xx
K511Xx
MINIATURE POSITIVE ACTION SWITCHES
Series—8855, 8856, 8866-69
SELECTION T ABLE
MIL-S-8834 Miniature Positive Action Switches
Toggle and Lever Lock/ IWTS Terminals
8855
CIRCUIT WITH LEVER IN...
Up
Position
Center
Position
Down
Position
(Keyway)
8856
TWO POLE
ONE POLE
ON§
ON
ON
ON
ON
ON
ON§
ON§
ON
ON
ON
ON§
NONE
ON
ON
ON
§
OFF§
OFF§
OFF
NONE
NONE
OFF
NONE
NONE
OFF§
OFF§
OFF
OFF
OFF§
OFF§
OFF
ON
§
ON
ON
NONE
OFF
ON
ON
OFF
ON
ON
ON
ON
NONE
ON
ON
ON
ON
*
*
*
*
*
*
Lever Lock
Bushing
Style
A
B
B
C
C
D
E
E
F
G
H
J
K
K
L
A
MS
Part
Number
MS21346-A211
-B211
-B241
-C221
-C231
MS21346-D211
-E221
-E231
-F271
-G311
MS21346-H271
-J241
-K281
-K311
-L311
Catalo g
Number
8855K54
K55
K519
K513
K57
8855K510
K514
K58
K515
K516
8855K517
K59
K518
K520
K512
MS
Part
Number
MS21347-A211
-B211
-B241
-C221
-C231
MS21347-D211
-E221
-E231
-E271
-G311
MS21347-H271
-J241
-K281
-K311
-L311
Catalo g
Number
8856K54
K55
K519
K513
K57
8856K510
K514
K58
K515
K516
8856K517
K59
K518
K520
K512
8856K527
*
Momentary contact.against which lever is locked.
§
Indicates direction
See page 77 for special circuit diagrams.
OPTIONS/ACCESSORIES
• Special mounting hardware
• Special marking
• Mounting hardware furnished assembled
• Panel seal, Part Number 32-341
(15/32"- 32 bushing only)
• Special circuits
• Special bushing and lever finish
• Special locking cap style on
lever lock switches
• EMI/RFI capability on two pole
(15/32" - 32 bushing only)
LEVER LOCK – BUSHING STYLES
PANEL CUTOUT DIMENSIONS
MINIATURE POSITIVE ACTION SWITCHES
Series—8855, 8856, 8866-69
MIL-S-8834 Miniature Positive Action Switches
Toggle and Lever Lock/ IWTS Terminals
MOUNTING DIMENSIONS—ONE POLE / 8855, 8866, 8868
Small T oggle
Large Toggle / Terminal Identification
Lever Lock
MOUNTING DIMENSIONS—TWO POLE / 8856, 8867, 8869
STANDARD
0.00 = inches
[0,0] = mm
Small T oggle
Large Toggle / Terminal Identification
Lever Lock
Mounting dimensions for reference only.
