Environmentally Sealed Pushbuttons
Series WB
Distinctive Characteristics
Single unit construction of the bushing and case gives added
protection from environmental elements.
Specially designed contact mechanism for breaking light welds.
Minimal contact bounce is achieved with specially
designed interlocked switching mechanism.
Outer housing of heat resistant resin meets UL 94V-0
flammability standard and provides high arc and
tracking resistance.
Solder lug and screw terminal models meet IP67 of
IEC60529 Standards at front panel (dust tight and
water protected for temporary immersion). Behind
panel standard is IP60 (dust tight but not water protected).
Wire lead models conform fully to IP67 of IEC60529 Standards
at front and behind panel (dust tight and water protected for
temporary immersion). These models are epoxy sealed at the
switch base and covered by an outer case for further protection
from dust and water (not operable under water).
Actual Size
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
02-08
Environmentally Sealed Pushbuttons
Series WB
General Specifications
Electrical Capacity (Resistive Load)
Power Level:
6A @ 125V AC & 3A @ 250V AC or 6A @ 30V DC
Other Ratings
Contact Resistance:
Insulation Resistance:
Dielectric Strength:
Mechanical Life:
Electrical Life:
Contact Timing:
Total Travel:
10 milliohms maximum for solder lug & screw terminal models
30 milliohms maximum for wire lead terminal models
200 megohms minimum @ 500V DC
1,500V AC minimum for 1 minute minimum
30,000 operations minimum
15,000 operations minimum
Break before make
Alternate Action .177” (4.5mm); Momentary Action .110” (2.8mm)
Materials & Finishes
Plunger:
Bushing & Outer Case:
Inner Case:
Inner Sealing Ring:
Outer Sealing Ring:
Movable Contactor:
Movable Contacts:
Stationary Contacts:
Terminals:
Wire Lead Covers:
Brass with nickel plating
Fiberglass reinforced polyamide (UL94V-0 outer case)
Melamine
Silicone rubber
Natural rubber
Copper with silver plating
Silver alloy with silver plating
Silver alloy with silver plating
Brass with silver plating for screw lug models;
brass with tin plating for solder lug & wire lead models
Heat resistant polyvinyl chloride (Leads are AWG 16.)
Environmental Data
Operating Temp Range:
Humidity:
Vibration:
Shock:
–30°C through +70°C (–22°F through +158°F)
90 ~ 95% humidity for 96 hours @ 40°C (104°F)
10 ~ 55Hz with peak-to-peak amplitude of 1.5mm traversing the frequency range & returning
in 1 minute; 3 right angled directions for 2 hours
50G (490m/s
2
) acceleration (tested in 6 right angled directions, with 5 shocks in each direction)
Installation
Mounting Torque:
Soldering Time & Temp:
1.5Nm (13 lb
•
in)
Manual Soldering: See Profile A in Supplement section.
Standards & Certifications
Flammability Standards:
Wiring Material Standards:
UL94V-0 outer case
UL AWM 1015 Recognized at Flammability VW-1;
Temperature Range –20°C ~ +105°C; Maximum Load 600V; AWG 16
CSA TEW 105 Certified at Temperature Range –20°C ~ +105° C;
Maximum Load 600V
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
02-08
Environmentally Sealed Pushbuttons
TYPICAL SWITCH ORDERING EXAMPLE
Series WB
A
CAP COLORS
A
B
C
*
D
*
E
F
*
G
Black
White
Red
Amber
Yellow
Green
Blue
Gray
WB
POLES
1
SPDT
1
2
S
T
L
S
TERMINALS
Solder Lug
Screw Lug
Wire Lead
D
E
D
CAPS
.520”
(13.2mm) Dia.
.748”
(19.0mm) Dia.
CIRCUITS
2
5
ON
ON
ON
(ON)
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
WB12S-DA
Black .520”
(13.2mm) Dia.
Cap
SPDT
ON-ON Circuit
Solder Lug Terminals
( ) = Momentary
*
H
* Not available
with cap code E
POLES & CIRCUITS
Actuator Position
( ) = Momentary
Pole
Model
Normal
Flat
Connected Terminals
Normal
Flat
Throw & Schematics
Note: Terminal numbers are not actually
on wire lead models.
1 (COM)
Down
Down
SP
SP
WB12
WB15
ON
ON
ON
(ON)
1-1b
1-1b
1-1a
1-1a
SPDT
1a
1b
STANDARD WIRE COLOR SCHEME
Wire leads are covered with heat resistant vinyl in accordance
to UL 1015 and CSA TEW 105 Standards for Appliance Wiring
Material (AWM).
Terminal Numbers & Wire Colors
Models
WB12L, WB15L
1a
White
1
Black
1b
Red
TYPICAL SWITCH DIMENSIONS
Solder Lug
Flatted
(0.8) Typ
.031
(13.2) Dia
.520
1b
1
(28.8)
1.134
(11.2)
.441
(12.5) Dia
.492
(2.4) Dia Typ
.094
M12 P1
(11.0)
.433
(15.8)
.622
1a
(1.0)
.039
(9.6)
.378
(33.0)
1.299
(4.8)
.189
(4.8)
.189
(19.4)
.764
Panel Thickness
.157” (4.0mm)
WB15S-DA
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
02-08
Environmentally Sealed Pushbuttons
TYPICAL SWITCH DIMENSIONS
Screw Lug
M3.5 x 5
Flatted
Series WB
1b
(13.2) Dia
.520
(6.6)
.260
1
1a
(28.8)
1.134
(11.2)
.441
(12.5) Dia
.492
M12 P1
(11.0)
.433
(15.8)
.622
(1.0)
.039
(9.6)
.378
(36.5)
1.437
(8.3)
.327
(1.0)
.039
(19.4)
.764
Panel Thickness
.157” (4.0mm)
WB12T-DA
Wire Lead
Flatted
1b
(13.2) Dia
.520
1
(30.2)
1.189
(11.2)
.441
(12.5) Dia
.492
1a
M12 P1
(11.0)
.433
(15.8)
.622
(9.6)
.378
(1.0)
.039
(38.0)
1.496
(10.0)
.394
(200.0)
+ (20.0)
-
7.874
(20.8)
.819
Panel Thickness
.157” (4.0mm)
WB12L-DA
CAPS & CAP COLORS
D
AT414
.520” (13.2mm) Diameter
(12.8) Dia
.504
E
AT412
.748” (19.0mm) Diameter
Colors Available:
ABCDEFGH
Material: PBT
Cap Color
Codes:
Finish: Glossy
M3.5 P0.6
(11.0)
.433
(14.9)
.587
Colors Available:
ABCF
Material: Polystyrene
Finish: Glossy
M3.5 P0.6
(8.0)
.315 (11.7)
.461
(13.2) Dia
.520
(19.0) Dia
.748
A
Black
B
White
C
Red
D
Amber
E
Yellow
F
Green
G
Blue
H
Gray
STANDARD HARDWARE
AT503M
Hex Face Nut
Material:
Brass with
chrome plating
1 supplied
with each
switch
M12 P1
AT508
Internal Tooth Lockwasher
(14.3)
.563
(12.1)
.476
AT401P
O-ring
(15.8) Dia
.622
Material:
Steel with
zinc/chromate
1 supplied
with each
switch
Material:
Natural
rubber
1 supplied
with each
switch
(12.1) Dia
.476
(17.5) Dia
.689
(13.8) Dia
.543
(16.0)
.630
(2.4)
.094
(1.0)
.039
(0.5)
.020
(1.5)
.059
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
02-08
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