8500 Series
Subminiature Pushbutton Switches
Features/Benefits Typical Applications
A
Pre-travel or over-travel models Detection
available
Telecommunications and
Ratings up to 3 AMPS networking equipment
Reliable contact design Computers and peripherals
RoHS compliant
Models Available
Specifications
Materials
CONTACT RATING: Q contact material (853X Models): 1 AMP @ CASE: Glass filled phenolic or diallyl phthalate (DAP) (UL 94V-0).
120 V AC or 28 V DC; (855X Models): 3 AMPS @ 120 V AC or
PLUNGER: Phenolic or glass filled polyester, black standard(UL94V-0).
28 V DC. See page A-65 for additional ratings.
CAP & FRAME: Nylon, black, standard.
ELECTRICAL LIFE:
BUSHING: Brass, nickel plated.
853X MODELS: 250,000 actuations at full load.
855X MODELS: 10,000 actuations at full load. CONTACTS: Q contact material: Coin silver, silver plated. See page
A-65 for additional contact materials.
CONTACT RESISTANCE: Below 30 m typ. initial @
2-4 V DC, 100 mA, for both silver and gold plated contacts. TERMINALS: Q contact material: Copper alloy, silver plated. See page
9 A-65 for additional contact materials.
INSULATION RESISTANCE: 10 min.
TERMINAL SEAL: Epoxy.
DIELECTRIC STRENGTH: 1,000 Vrms min. @ sea level.
HARDWARE: Nut: Brass, nickel plated; Lockwasher: Steel, bright
OPERATING TEMPERATURE: 30C to 65C.
nickel plated.
TORQUE SPECS: T, T1 15/32 bushings - 50 in. lbs max.
All other 1/4 -40 bushing types 12 in. lbs max.
NOTE: Any models supplied with Q, B or G contact material are RoHS compliant.
NOTE: Specifications and materials listed above are for switches with standard options.
For information on specific and custom switches, consult Customer Service Center.
Build-A-Switch
To order, simply select desired option from each category and place in the appropriate box. Available options are shown
and described on pages A-63 thru A-66. For additional options not shown in catalog, consult Customer Service Center. All
models have epoxy terminal seal and are compatible with all bottom-wash PCB cleaning methods.
Switch Function
8531 SPST Off-Mom. 1 Amp
8532 SPST Off-Mom. 1 Amp
8533 SPST On-Mom. 1 Amp
8534 SPST On-Mom. 1 Amp
8551 SPST Off-Mom. 3 Amps
8552 SPST Off-Mom. 3 Amps
Actuator or Plunger
M .150 high
J81 Snap-in with frame
J82 Snap-in with frame for LED
Terminations
S .210 high
Z Solder lug
T 15/32 bushing
AV* Right angle, PC thru-hole
T1 15/32 bushing with frame
C PC Thru-hole
(8532 and 8534 only)
Contact Material
Q Silver
B Gold
Seal
G Gold over silver
E Epoxy
D No epoxy seal
Cap or Plunger Color
* Available with M or S plunger models, and B contact material only. 2 Black
1 White
3 Red
Frame Color
9 Gray
2 Black
NONE Models without frame
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
www.ckswitches.com
A-62
PushbuttonPushbutton
8500 Series
Subminiature Pushbutton Switches
SWITCH FUNCTION
A
SWITCH FUNCTION
POS. 1 POS. 2
NO. MODEL ACTUATION
POLES NO. RATING TOTAL TRAVEL FORCE SCHEMATIC
8531 1 AMP
with overtravel
SP OFF MOM. .095 (2,41) TYP. 7.7 oz (220g) TYP. N.O. with overtravel
.042 (1,07) TYP.
8551 3 AMPS
SPST
Part number shown: 8531MZQE2
8532 1 AMP
SP OFF MOM. .050 (1,27) TYP. 6 oz (170g) TYP. N.O.
8552 3 AMPS
SPST
Part number shown: 8532MZQE2
with pretravel
8533 1 AMP ON MOM. .080 (2,03) TYP. 11.5 oz (456 g) TYP. N.C. with pretravel
.057 (1,45) TYP.
SP
with overtravel
8534 1 AMP ON MOM. .032 (0,81) TYP. 10.3 oz (282g) TYP. N.C. with overtravel
.028 (0,71) TYP.
SPST
Part number shown: 8533MZQE2
MOM. = Momentary
All models with all options when ordered with G or Q contact material.
Third Angle
Projection
Dimensions are shown: Inches (mm)
Specifications and dimensions subject to change
www.ckswitches.com
A-63