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D4 series recommended for new designs
K Series
Miniature Snap-Action Switches
Features
  •  Choice of current ratings up to 25 amps
  •  Choice of actuators
  •  Choice of terminals
  •  3 contact arrangements
  •  Choice of operating force
  •  Long mechanical life
  •  Wiping contact action
  •  Snap over actuators
  •  Agency approved extended life versions
K Series
K Series

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K Series Cutaway

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  Electrical Ratings
Switch
Series
EN61058
Rating
UL1054
Rating
Electrical Life at Rated Load
According to VDE
(Min. Operations)
According to UL
(Min. Operations)
KWA/KWB 50mA, 28VDC 50mA, 28VDC
50,000
100,000
KWC/KWD 1(0.5)A, 250VAC 1.0A, 125/250VAC
50,000
100,000
KWE/KWF 3(1)A, 250VAC 3A, 1/10HP, 125/250VAC
50,000
100,000
KWG/KWH 6(2)A, 250VAC 5A, 1/4HP, 125/250VAC
50,000
100,000
KWJ/KWK 10(3)A, 250VAC 10A, 1/2HP, 125/250VAC
50,000
100,000
KWL N/A 15.1A, 1/2HP, 125/250 VAC
   5A, 125VAC Lamp Load (85°C only)
   0.5A, 125VDC (85°C only)
   0.25A, 250VDC (85°C only)
N/A
100,000
KWM 16(4)A, 250VAC 15.1A, 1/2HP, 125/250VAC
   0.5A, 125VDC (85°C and 150°C only)
   0.25A, 250VDC (85°C and 150°C only)
15.1A, 1/2HP, 125/250VAC (200°C only)
50,000
100,000
KWS N/A 25A, 125/250VAC (85°C only)
   1HP, 125VAC (85°C only)
   2HP, 250VAC (85°C only)
N/A
100,000
  Specifications
Electrical
Temperature Rating: -40° to +85°C, 150°C or 200°C
Flammability Rating: UL94V-O
Materials
Case/Cover: Thermoplastic Polyester (85°C or 150°C)
Liquid Crystal Polymer (200°C)
Button: Thermoplastic Acetal (85°C)
Thermoplastic Polyester (150°C)
Liquid Crystal Polymer (200°C)
Auxiliary Actuator: Cold-Rolled Steel (Nickel-Plated)
Terminals: Brass
Copper (25 amp only)
Moving Blade: Beryllium Copper
Contacts: Silver Alloy (except KWA and KWB — Gold-Plated)
  Approvals
International Approved Versions
K Series switches, except 25A (KWS), are internationally approved. Switches with straight terminals may require insulated connectors for international approval.
  Dimensions

K Series Dimensions

Inches (mm)

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  Mounting

Recommended mounting screw size:  #4-40 Round Head.
Recommended torque on screw:  3 inch lbs. max.
 

 
  Actuators

Standard type snap over hinged lever and roller actuators are available in choice of two pivot positions. Actuation lengths are dimensioned from centerline of switch upper mounting hole as shown here.

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Auxiliary Actuators

Auxiliary Actuators

  Actuator Specifications
Actuator
Type
Switch
Type
Maximum Operating Force
(grams)
Max.
Pre-Travel

inches
(mm)
Operating
  Point*

inches
(mm)
Min.
Over-Travel

inches
(mm)
Max.
Movement Differential

inches
(mm)
Actuation
 Length**

inches
(mm)
KWA, KWC, KWE
KWG
KWB, KWD, KWF, KWJ
KWH, KWK, KWM
KWS
A
Type A
25
50
75
150
225
0.056
(1.42)
0.602/0.563
(15.29/14.30)
0.050
(1.27)
0.010
(0.25)
n/a
B
Type B
25
50
75
150
225
0.075
(1.90)
0.631/0.585
(16.03/14.85)
0.051
(1.29)
0.012
(0.31)
0.865
(21.97)
C
Type C
14
27
40
80
120
0.146
(3.71)
0.659/0.569
(16.74/14.45)
0.085
(2.16)
0.030
(0.76)
1.400
(35.56)
D
Type D
6
12
18
36
54
0.330
(8.38)
0.725/0.527
(18.41/13.38)
0.182
(4.62)
0.051
(1.30)
2.722
(69.14)
E
TypeE
15
30
44
88
132
0.133
(3.38)
0.653/0.572
(16.59/14.52)
0.074
(1.88)
0.021
(0.54)
1.077
(27.36)
F
Type F
8
15
23
45
67
0.267
(6.78)
0.702/0.541
(17.83/13.74)
0.146
(3.71)
0.041
(1.05)
1.612
(40.94)
G
4
7
10
20
30
0.593
(15.06)
0.820/0.467
(20.83/11.86)
0.407
(10.33)
0.091
(2.32)
2.934
(74.52)
J
Type J
16
31
46
92
138
0.128
(3.25)
0.776/0.698
(19.71/17.72)
0.088
(2.23)
0.020
(0.51)
1.254
(31.85)
M
Type M
9
18
26
52
77
0.232
(5.88)
0.813/0.675
(20.65/17.14)
0.115
(2.92)
0.036
(0.92)
1.466
(37.24)
Q
Type Q
15
29
43
85
127
0.140
(3.56)
0.872/0.786
(22.15/19.96)
0.096
(2.43)
0.022
(0.56)
1.340
(34.04)
T
8
16
24
47
71
0.253
(6.43)
0.912/0.761
(23.16/19.32)
0.173
(4.39)
0.039
(1.00)
1.552
(39.42)
*Measured above reference line. Refer to dimensional drawing above.
**Actuator tolerance ±0.031 inches (0.79mm)
  Ordering Information

Ordering Info Chart

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D4 series recommended for new designs
Specifications subject to change without notice.