MINIATURE POSITIVE ACTION SWITCHES
Series—8866, 8867, 8868, 8869
MIL-S-8834 Miniature Positive Action Switches
Printed Circuit Terminals
CURRENT RATINGS
No. of Catalog
Poles Number
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
8866 Maintained and 5
1
1
–
2
3
1
2
and 8868 Momentary
2
8867 Maintained and 5
1
1
–
2
3
1
2
and 8869 Momentary
Minimum Rating: 25
µA
at 5 millivolts or less.
Type of
Operation
FEATURES
• Sealed bushing
• Dry circuit (logic level loads) to power
switching levels
• Two bushing and toggle lever sizes
• 1 and 2 pole circuitr y
• Non-teasible mechanism for all but
center “ON” circuits
• Wiping action contacts
• Positive make and break action
• Small and large size bushings
and acutators
• Printed circuit board termination
• Two types of printed circuit board
terminals
- straight
- formed
SPECIFICATIONS
• Bushing seal or bonded seal per MIL-S-8834
• MS approved and QPL’d 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
• “O” ring panel seal on 1/4"-40 type
bushing size
SELECTION TABLE
CIRCUIT WITH LEVER IN...
Up
Position
Center
Position
Down
Position
(Keyway)
Small Lever with
Straight Mount
PC Terminals
MS
Part
Number
ON
ON
ON
ON
ON
NONE
ON
NONE
ON
ON
ON
ON
ON
NONE
ON
NONE
ON
ON
ON
ONE POLE
OFF
ON
NONE
OFF
NONE
ON
OFF
NONE
OFF
ON
OFF
ON
OFF
ON
ON
ON
TWO POLE
OFF
ON
NONE
OFF
NONE
ON
OFF
NONE
OFF
ON
OFF
ON
OFF
ON
ON
ON
ON
ON
ON
ON
ON
ON
MS21354-211
-221
-231
-241
MS21354-271
-281
-311
-321
Catalo gy
Number
Small Lever with
Formed Mount
PC Terminals
MS
Part
Number
Catalo gy
Number
MS
Part
Number
Large Lever with
Straight Mount
PC Terminals
Catalo gy
Number
MS
Partz
Catalo gy
Number
Number
BONDED SEAL
Feature Not Available
In Single Pole Switches
8866
8866KA
8868
*
*
*
*
*
8866K61 MS21433-211 8866KA61 MS21356-211 8868K61
K67
-221
KA67
-221
K67
K64
-231
KA64
-231
K64
K65
-241
KA65
-241
K65
8866K62 MS21433-271 8866KA62 MS21356-271 8868K62
K66
-281
KA66
-281
K66
K63
-311
KA63
-311
K63
K68
x
-321
KA68x
-321
K68
x
8867
8867KA
8869
*
*
*
Momentary contact. circuit diagrams.
See page 77 for special
*
*
*
*
*
*
BONDED SEAL
MS21355-211 8867K61 MS21434-211 8867KA61 MS21357-211 8869K61 MS21357-711 8869K61X
-221
K67
-221
KA67
-221
K67
-721
K67X
-231
K64
-231
KA64
-231
K64
-731
K64X
-241
K65
-241
KA65
-241
K65
-741
K65X
MS21355-271 8867K62 MS21434-271 8867KA62 MS21357-271 8869K62 MS21357-771 8869K62X
-281
K66
-281
KA66
-281
K66
-781
K66X
-311
K63
-311
KA63
-311
K63
-811
K63X
MS21355-321 8867K68
x
MS21434-321 8867KA68x MS21357-321 8869K68x MS21357-821 8869K68X
x
-331
K69
x
-331
KA69x
-331
K69x
-831
K69X
x
-351
K610
x
-351
KA610x
-351
K610x
-851
K610X
x
-341
K611
x
-341
KA611x
-341
K611x
-841
K611X
x
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
Caution should be exercised during soldering and flux removal. See page 62 for details.
z
Furnished with Bonded Seal Feature. (Meets 15’ head of water sealing level.)
MINIATURE POSITIVE ACTION SWITCHES
Series—8866, 8867, 8868, 8869
MIL-S-8834 Miniature Positive Action Switches
Printed Circuit Terminals
MOUNTING DIMENSIONS—ONE POLE
8866
Straight PC Mount
8868
Straight PC Mount
STANDARD
0.00 = inches
[0,0] = mm
Mounting dimensions for reference only.
8866KA
For med PC Mount
Terminal Identification
Non-functional terminals not supplied.
MINIATURE POSITIVE ACTION SWITCHES
Series—8866, 8867, 8868, 8869
MIL-S-8834 Miniature Positive Action Switches
Printed Circuit Terminals
MOUNTING DIMENSIONS—TWO POLE
8867
Straight PC
Mount
8867KA
For med PC
Mount
8869
Straight PC
Mount
STANDARD
0.00 = inches
[0,0] = mm
Mounting dimensions for reference only.
Terminal Identification
Non-functional terminals not supplied.
MINIATURE POSITIVE ACTION SWITCHES
Series—8866, 8867, 8868, 8869
MIL-S-8834 Miniature Positive Action Switches
Printed Circuit Terminals
CAUTION AND RECOMMENDATION FOR CLEANING AND SOLDERING
Contamination of the contacts of miniature switches is the most common cause of problems in low energy circuits,
resulting in the inability of current to flow through the increased resistance of the switch contacts.
As most contamination occurs during the installation and cleaning of the switch, proper care when installing the switch can
reduce problems in this area. The following procedures should be followed to reduce the possibility of switch contact conamination.
Hand Solder
1. Use rosin core solder .030" – .040" diameter.
2. A small soldering iron in the 30 to 40 watt range should be used.
3. The solder joint should not be overheated.
4. Do not position switch with terminations straight up.
5. No clean up should be necessary. However if used, do not allow solvents to enter non-sealed areas of switches.
Wave Solder – Miniature Switches
Do not immerse or spray with solvents to remove flux except for switches designed for this type of cleaning.
The use of wave solder oil is not advised.
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 plating
• Mounting adapter nut
• Custom wire harnesses
• EMI/RFI capability on two pole (15/32" - 32 bushing only)
• Gold plated contacts
PANEL CUTOUT DIMENSIONS
