Beckwith Electronics

Hamburg, Illinois 62045
(618) 232-1139

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EAO SECME Division


Discontinued for reference only

MICRO-COSMOS  Miniature PCB-mounting tactile key switches

Subminiature MICRO-COSMOS key switches offer a variety of configurations to meet your requirements for machine control, instrument, and other equipment applications. Models are available for pick-and-place insertion machines, with easy-to-insert terminals for manual PCB assembly, in a right-angle mounting, and with a silicone rubber membrane to increase tactile action. A surface mount version is offered. Designed to last for years of operation, units can be supplied with accessory buttons for through-hole front panel mounting or assembled in membrane-type constructions with a film overlay.

  1. Heavy gold plated contacts for low levels
  2. Positive tactile feel
  3. Straight and right-angle terminals
  4. Accessory buttons for front panel mounting
  5. Available for machine and manual insertion
  6. Sealed for soldering and immersion cleaning
  7. 1-million operations



Specifications
Contacts:
standard silver plated
(2 u) on nickel
 
 
 
 
 
 
24V/20mA nominal
50V max.
100mV/10mA min.
0.5W nominal power
<100m Ohms contact resistance
heavy gold plated
(0.5 u) on nickel
 
 
 
 
 
24 V/20 mA nominal
50V max
10 mV/500 uA min
0.5 W nominal power
<20 M Ohms contact resistance
Dielectric strength250 V RMS, 50 Hz
Insulation resistance>1,000 M Ohms, 100 VDC
Insulation, self-extinguishingglass-filled thermoplastic, 94V-0 (UL94)
Operating force3 N (4.2 N: reinforced tactile feel)
Operating travel0.45 mm mean value
Total travel0.80 mm mean value
Maximum bounce<5 msec
Operating life1-million operations
Vibration resistance
 
10-2000 Hz, 0.75 mm, 10 g
test time: 2 hrs, 30 min
Mechanical shock resistance100 G
Terminals4 u SnPb on nickel
Operating temperature-25 to +85°C
Storage temperature-55 to +85°C
Sealing
 
 
sealed for soldering and immersion
cleaning in solvents. Max. immersion
time: 90 sec
Soldering time 5 sec/250°C
Packaging50 pieces per tube

Ordering Information
DescriptionPart Number
Standard Silver
Contacts
Heavy Gold
Contacts
For automatic insertion
Action AMC 10333 00MC 12551 00
Action BMC 10191 00 
Action A, reinforced tactile feelMC 10311 00MC 12511 00
For manual insertion
Action AMC 10333 11MC 12551 11
Action C, right angle terminalsMC 10355 00MC 12555 00

Dimensions & Mounting
Standard module,
supplied in tubes
for automatic insertion.
Operating force: 3 N.

Part Numbers:

Silver contacts:
MC 10333 00
MC 10191 00

Gold contacts:
MC 12551 00

Reinforced tactile feel
module can be mounted
under a film overlay
without a button.
Operating force: 4.2 N.
Supplied in tubes for
automatic insertion.

Part Numbers:

Silver contacts:
MC 10311 00

Gold contacts:
MC 12511 00

Bent terminals facilitate
manual insertion.
Operating force: 3 N.

Part Numbers:

Silver contacts:
MC 10333 11

Gold contacts:
MC 12551 11

Right angle terminals,
can be used as PCB edge
pushbutton, etc,
for manual insertion.
Operating force: 3 N.

Part Numbers:

Silver contacts:
MC 10355 00

Gold contacts:
MC 12555 00


PCB Mounting (Pitch in mm)
Type of Module Between Terminals Between Modules
Without button With 8 mm button With 10 mm button
Automatic insertion 5.08 x 7.62 7.62 x 10.16 8.89 x 10.16 10.16 x 10.16
Manual insertion 5.08 x 7.62 7.62 x 10.16 8.89 x 10.16 10.16 x 10.16
Right Angle 5.08 x 5.08 7.62 10.16 10.16