Datenblatt

SPECIFICATIONS
CONTACT RATING: Dependent upon contact material See Page 138.
MECHANICAL LIFE: 50,000 make-and-break cycles.
CONTACT RESISTANCE: 20 mȟġmax. initial @ 2-4VDC
100mA for both silver and gold plated contacts.
INSULATION RESISTANCE: 1,000 Mȟġmin.
DIELECTRIC STRENGTH: 1,000 Vrms min.@sea level.
OPERATING TEMPERATURE: -30°C to 85°C.
MATERIALS
8B
Sealed Sub-Miniature Pushbutton Switches(SMT)
CASE & BUSHING: Glass filled nylon 6/6,flame retardant,
heat srabilized (UL94v-0).
PLUNGER: Thermoplastic Polyester (UL 94V-0),
with intenal O-ring seal.
SWITCH SUPPORT: Brass,tin plated.
CONTACT / TERMINALS: Silver or gold plated copper alloy.
(See Page 138)
136
HOW TO ORDER
MODEL NO.
TERMINATIONS
CONTACT
MATERIAL
SEAL
RoHS
SOLDERING
E
Model NO.
8BS8 On-Mom.
8BS9 Off-Mom.
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Terminations
MT (STD) Right angle, surface mount.
MZ (STD)
Contact material
Q Silver
R Gold
C Gold over silver
Seal
E EPOXY (std)
RoHS soldering
Rohs Compliant
S Rohs & Lead Free
F Halogen Free+RoHS
8B Series
Sealed Sub-Miniature Pushbutton Switches(SMT)
SWITCH FUNCTION
CONNECTED TERMINALS / SCHEMATIC
SWITCH FUNCTION
NO.
POLES
UL/CSA
MODEL
NO.
MODEL
NO.
POS.1
POS.2
SP
Q28B18
8BS8
ON
MOM
Q28B19
8BS9
OFF
MOM
POS.1
POS.2
2 (COMM)
2-1
NC 1
3 NO
2-3
1-3
OPEN
2 (COMM)
NC 1
3 NO
1
3
MOM=MOMENTARY
POLE OPTIONS
MT
.244
6.20
Ø.100
Ø2.54
.410
10.41
MAX.
.067
1.70
.030
0.76
.283
7.20
.325
8.23
.020
0.51
.096
2.45
1 2
.343
8.70
.070
1.78
3
.200
5.08
8B
EPOXY
SEAL
.124
3.15
.150
3.81
.040
1.02
2 3
.233
5.90
1
.320
8.13
.140
3.56
.080
2.03
.020
0.51
.128
3.25
.040
1.02
Pushbutton Switches
P.C. MOUNTING
1.71
4.35
SPDT
Part No. Shown : 8BS8MTRE
MZ
P.C. MOUNTING
.160
4.06
.233
5.90
.320
8.13
.234
5.94
.325
8.23
1 2
Ø.100
Ø2.54
SPDT
EPOXY
SEAL
.121
3.08
.400
10.16
.272
6.90
.071
1.80
.059
1.50
3
.200
5.08
.276
7.00
.020
0.51
.313
7.95
1 2 3
.031
0.80
.079
2.00
.100
2.54
.200
5.08
Part No. Shown : 8BS8MZRE
MT
P.C. MOUNTING
.244
6.20
.410
10.41
MAX.
Ø.100
Ø2.54
.067
1.70
.283
7.20
EPOXY
SEAL
.124
3.15
.030
0.76
.343
8.70
.325
8.23
.020
0.51
.096
2.45
1
.070
1.78
3
.150
3.81
.040
1.02
2 3
1.71
4.35
.220
5.60
1
.320
8.13
.200
5.08
.140
3.56
.040
1.02
.080
2.03
.128
3.25
SPST
Part No. Shown : 8BS9MTRE
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137
MZ
P.C. MOUNTING
.160
4.06
.220
5.60
.320
8.13
EPOXY
SEAL
.121
3.08
.234
5.94
.272
6.90
.325
8.23
1 3
Ø.100
Ø2.54
.400
10.16
.059
1.50
.313
7.95
.071
1.80
.200
5.08
.051
1.30
.079
2.00
.276
7.00
.200
5.08
.032
0.80
SPST
Part No. Shown : 8BS9MZRE
8B
Sealed Sub-Miniature Pushbutton Switches(SMT)
PACKAGING
Switches available on embossed antistatic tape and reels.
Tape and cover strip are conductive for use near statically sensitive components.
1.238
31.44
.087
2.20
.795
20.20
12.992
330.00
1.476
37.50
SCALE: 10 : 1
.079
2.00
.630
16.00
.157
4.00
Ø.061
Ø1.55
DIA.
.630
16.00
1.260
32.00
.873
22.18
ELONGATED SPROCKET
HOLES
.260
6.60
.068
1.75
1.118
28.40
.350
8.90
REEL INFORMATION
SCALE: 1 : 1
138
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QUANTITY PER REEL
500 / pcs
8B Series
Sealed Sub-Miniature Pushbutton Switches(SMT)
CONTACT MATERIAL OPTIONS
CONTACT PLATING
Q
C
R
Silver
Gold over Silver
Gold
TERMINAL PLATING
RATINGS
Q = Gold flash over silver
3 Amps with resistant load @ 120VAC or 28VDC
C = Gold over silver
1 Amps with resistant load @ 250VAC
R = Gold
0.4 Volt - Amps ( VA ) max. @ 20V max. ( AC or DC )
8B
MANUAL SOLDERING: Use soldering iron of 30 watts, controlled at 350°C
approximately 5 seconds while applying solder.
WAVE SOLDERING: Recommended Soldering Temperature: 260 ± 5°C
Duration of Solder Immersion: Max 5 sec. (PCB is 1.6mm in thickness)
SOLDERING: Vapor phase & IR-reflow soldering can be applied.
Pushbutton Switches
SOLDERING PROCESSES
Temperature Profile
Zone
Room Temperature
Time (Sec)
Pre-heat (A)
150°C
Min 120s
Soak
(B)
180°C ~ 200°C
Min 150s
Peak
(C)
200°C ~ 235°C
Min 30s
Peak
(D)
235°C ~ 260°C
Min 40s
Peak
(E)
260°C
Max 5s
Peak : 260°C
(°C)
250
200
150
100
50
A
B
C
D
E
Room
Temperature
Time (Sec)
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139
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