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K Series
Features
I
Choice of current ratings
up to 25 amps
I
Choice of actuators
I
Choice of terminals
I
3 contact arrangements
I
Choice of operating force
I
Long mechanical life
I
Wiping contact action
I
Snap over actuators
I
Agency approved
extended life versions
Miniature
3
®
Flame retardant, UL94V-O
self-extinguishing case and cover.
Long life snap action
switch mechanism.
ARC-resistant case
has internal barriers
4mm minimum between
live parts and external
hardware.
NC Terminal
NO Terminal
Choice of U.S. (#4 screw)
or metric (3mm screws).
Single or double throw,
either normally open or
normally closed.
Common Terminal
3-13
K Series
Dimensions:
inches
Miniature
1.140
0.174 or
0.125
0.406
0.250 or
0.187
0.047
Max.
Pretravel
0.109
0.109
Ø 0.070
0.057
0.797
0.532
0.320
0.570
0.109
0.156
ØA
+
0.005
-
0.160
0.578
+
0.015
-
Oper. Pos.
0.406
+
0.005
-
COM
Ref. Line
A + 0.002
- 0.001
NC
0.112
NO
0.282
0.360
0.875
+
0.005
-
0.570
0.032 or
0.020
0.368
0.236
0.625
ØB
+
0.005
-
Mounting Holes
A Dim.
B Dim.
Mtg Screw
0.114
0.126
4-40
Notes:
SPDT switch (as shown) with 3 terminals NO, NC, and COM
SPST switch will have one terminal (NO or NC), and a COMMON
terminal depending on switch type
Dog Leg Terminal
Dimensions:
mm
28.956
0.4.42 or
0.3.175
10.312
6.35 or
4.75
1.194
Max.
Pretravel
2.769
2.769
Ø 1.778
1.448
20.244
13.513
8.128
14.478
2.769
3.962
ØA
+
0.127
-
4.064
14.681
+
0.381
-
Oper. Pos.
10.312
+
0.127
-
COM
Ref. Line
A + 0.051
- 0.025
NC
2.845
NO
7.163
9.144
22.225
+
0.127
-
14.478
0.813 or
0.508
9.347
5.994
15.875
ØB
+
0.127
-
Mounting Holes
A Dim.
B Dim.
Mtg Screw
3.10
3.46
3 mm
Notes:
SPDT switch (as shown) with 3 terminals NO, NC, and COM
SPST switch will have one terminal (NO or NC), and a COMMON
terminal depending on switch type
Dog Leg Terminal
3-14
K Series
U.S. Versions
These are K Series switches with UL and CUL approvals.
Terminals are “straight” and measure 0.187" x 0.020" thick,
0.187" x 0.032" thick or 0.250" x 0.032" thick.
International Approved Versions
These K Series switches have International approvals as well
as being UL recognized and CUL certified. They have 6.35
mm or 4.75 mm x 0.81 mm thick “offset” terminals and metric
mounting holes. They are also available with straight terminals
that require insulated connectors for international approval.
Miniature
Materials
Case/Cover
Thermoplastic Polyester
(85°C or 150°C)
Liquid Crystal Polymer (200°C)
Thermoplastic Acetal (85°C)
Thermoplastic Polyester (150°C)
Liquid Crystal Polymer (200°C)
Cold-rolled Steel (Nickel Plated)
Brass
Copper (25 amp only)
Beryllium Copper
3
Button
Auxiliary Actuator
Terminals
Moving Blade
Contacts and Ratings
Actuators
Series UL & CUL
Prefix Ratings
KWA
KWB
KWC
KWD
KWE
KWF
KWG
KWH
KWJ
KWK
KWL
50 mA, 28 VDC
50 mA, 28 VDC
1.0 amp, 125/250 VAC
1.0 amp, 125/250 VAC
3 amp, 125/250 VAC, 1/10 HP
3 amp, 125/250 VAC, 1/10 HP
5 amp, 1/4 HP
125/250 VAC
5 amp, 1/4 HP
125/250 VAC
Contact Material
Gold Plated
Gold Plated
Silver Alloy
Silver Alloy
Silver Alloy
Silver Alloy
Silver Alloy
Length of Auxiliary Actuator
Standard type snap over hinged lever and roller actuators
are available in choice of two pivot positions. Lengths are
dimensioned from centerline of switch upper mounting hole
as shown here.
Auxiliary Actuator
Silver Alloy
Straight
10 amp, 1/2 HP, 125/250 VAC Silver Alloy
10 amp, 1/2 HP, 125/250 VAC Silver Alloy
15.1 amp, 1/2 HP
Silver Alloy
125/250 VAC
5 amp, 125 VAC Lamp Load — 85°C only
0.5 amp, 125 VDC — 85°C only
0.25 amp, 250 VDC — 85°C only
15.1 amp, 1/2 HP
Silver Alloy
125/250 VAC
0.5 amp, 125 VDC — 85°C and 150°C only
0.25 amp, 250 VDC — 85°C and 150°C only
25 amp, 250 VAC
1 HP, 125 VAC
2 HP, 250 VAC
UL94V-O
Silver Alloy
Roller
0.532
0.320
Simulated
Roller
KWM
High Ratio
Standard Ratio
KWS
Temperature Rating
Flammability Rating
-40° to +85°C, 150°C or 200°C
3-15
K Series
OF Max. Gms.
Switch Types
KWA
KWC KWE
KWG
KWD KWJ KWH
KWB KWF KWK KWM
KWS
Miniature
Characteristics:
OF – Operating Force, PT – Pretravel, OP – Operating Point,
OT – Overtravel, MD – Movement Differential, AL – Actuator Length
PT
Max. Inches
mm
OP**
Inches
mm
OT
Min. Inches
mm
MD
Max. Inches
mm
AL
Inches
mm
Tol.
±
.031 in.
Tol. (
±
.78 mm)
Actuator Type
25
A
50
75
150
225
0.047
1.19
0.563
0.593
14.31
15.06
0.621
0.585
15.78
14.85
0.637
0.569
16.18
14.45
0.679
0.527
17.25
13.38
0.634
0.572
16.11
14.52
0.665
0.541
16.90
13.74
0.739
0.467
18.78
11.86
0.758
0.698
19.26
17.72
0.781
0.675
19.84
17.14
0.852
0.786
21.65
19.96
0.877
0.761
22.28
19.32
0.050
1.27
0.010
0.250
—
25
B
50
75
150
225
0.064
1.63
0.051
1.29
0.012
0.31
0.865
21.97
14
C
27
40
80
120
0.128
3.26
0.085
2.16
0.030
0.76
1.400
35.56
6
D
12
18
36
54
0.284
7.22
0.226
5.74
0.051
1.30
2.722
69.14
15
E
30
44
88
132
0.116
2.95
0.092
2.33
0.021
0.54
1.077
27.36
8
F
15
23
45
67
0.230
5.85
0.146
3.71
0.041
1.05
1.612
40.94
4
G
7
10
20
30
0.512
13.01
0.407
10.33
0.091
2.32
2.934
74.52
16
J
31
46
92
138
0.110
2.80
0.088
2.23
0.020
5.08
1.254
31.85
9
M
18
26
52
77
0.200
5.08
0.158
4.01
0.036
0.92
1.466
37.24
15
Q
29
43
85
127
0.120
3.05
0.096
2.43
0.022
10.56
1.340
34.04
8
T
16
24
47
71
0.218
5.54
0.173
4.39
0.039
1.00
1.552
39.42
** Measured above reference line. Refer to dimensional drawing on page 1.
3-16
K Series
Ordering Information
K
W
A
D
Q
A
Miniature
C
A
3
Series/Prefix
Code Temperature Rating
A
85°C-UL/CUL
B
150°C-UL/CUL
C
200°C-UL/CUL
D
85°C-UL/CUL/VDE/SEMKO
E
150°C-UL/CUL/VDE/SEMKO
Code
P
4
Q
R
S
T
V
W
Terminal Size
0.062 x 0.032 P.C.B.
0.187 x 0.020 Straight
0.187 x 0.020 Dog Leg
0.187 x 0.032 Straight
0.187 x 0.032 Dog Leg
0.250 x 0.032 Straight
0.250 x 0.032 Dog Leg
Code Mounting Holes
A
U.S.
B
Metric
Code Configuration
A
Normally Open
B
Normally Closed
C
Double Throw
Light
Standard
Current
Code Force Code Force Rating Notes
A
25
B
75
50 mA
1
C
25
D
75
1 Amp
1
E
25
F
75
3 Amp
1
G
50
H
150
5 Amp
1
J
75
K
150
10 Amp
1
L
150 15.1 Amp
3
M
150 15.1 Amp
2
S
225
25 Amp 3, 5
PCB terminals are lateral to
case only.
Code
A
B
C
D
E
F
G
J
M
P
Q
S
T
Snap Over Actuators
Type
Actuation Length
Button
Straight SR
0.865
Straight SR
1.400
Straight SR
2.722
Straight HR
1.077
Straight HR
1.612
Straight HR
2.934
SIM Roller SR
1.254
SIM Roller HR
1.466
Roller SR
0.810
Roller SR
1.340
Roller HR
1.022
Roller HR
1.552
Notes:
(1) UL and CUL rated for 100,000 cycles at 85°C, 150°C, 200°C. VDE rated for 150°C only.
(2) UL and CUL rated for 100,000 cycles at 85°C, 150°C, 200°C. VDE rated for 85°C only.
(3) UL and CUL rated for 100,000 cycles at 85°C only.
(4) Available in 10 amp and lower, UL and CUL rated for 100,000 cycles at 85°C and 150°C.
(5) Available with .250 x .032 terminals only.
17
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