Miniature Pushbuttons
Series KB
Distinctive Characteristics
Square, rectangular, and round shaped caps.
Latchdown feature gives indication of circuit status. Audible
and tactile feedback with smooth and responsive operation.
Snap-action mechanism for long life.
Stainless steel frame on snap-in models has a specially
designed projection, which prevents rotation and
correctly orients switch in panel.
12mm body diameter.
Molded-in terminals lock out flux, dust, and other
contaminants.
8mm panel thickness capability. Rear panel bushing
or snap-in mounting.
Optional PCB adaptors in straight and right angle types.
Matching illuminated switches available and shown in the
Illuminated section.
Matching indicators available and shown at the end of Section M.
Actual Size
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Miniature Pushbuttons
Series KB
General Specifications
Electrical Capacity (Resistive Load)
Power Level (code W):
Logic Level (code G):
1A @ 125/250V AC or 1A @ 30V DC
0.4VA maximum @ 28V AC/DC maximum
(Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V)
Note: Find additional explanation of operating range in Supplement section.
Other Ratings
Contact Resistance:
Insulation Resistance:
Dielectric Strength:
Mechanical Life:
Electrical Life:
Nominal Operating Force:
Contact Timing:
Travel:
50 milliohms maximum
1,000 megohms minimum @ 500V DC
1,000V AC minimum between contacts & 1,500 minimum between contacts & case (silver)
for 1 minute minimum;
750V AC minimum between contacts & 1,500 minimum between contacts & case (gold)
for 1 minute minimum;
100,000 operations minimum
50,000 operations minimum for silver; 100,000 operations minimum for gold
Single pole 0.98 ~ 2.45N for maintained & 0.98 ~ 1.96N for momentary;
Double pole 1.47 ~ 3.43N for maintained & 1.47 ~ 2.94N for momentary
Nonshorting (break-before-make)
Pretravel .087” (2.2mm); Overtravel .031” (0.80mm); Total Travel .118” (3.0mm)
Materials & Finishes
Housing:
Movable Contactor:
Stationary Contacts:
Housing Base:
Terminal Base:
Common Terminal:
End Terminals:
Polyamide (UL94V-0)
Silver for power circuit; copper with gold plating for logic level circuit
Silver for power circuit; copper with gold plating for logic level circuit
Polyamide (UL94V-0)
Polyester
Phosphor bronze with silver flash plating for power circuit;
Phosphor bronze with gold flash plating for logic level circuit
Brass with silver flash plating for power circuit;
Brass with gold flash plating for logic level circuit
Environmental Data
Operating Temp Range:
Humidity:
Vibration:
Shock:
–25°C through +70°C (–13°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 3 shocks in each direction)
Installation
Mounting Torque:
Cap Installation Force:
Soldering Time & Temperature:
0.78Nm (6.9 lb
•
in) maximum
4.51N (1.0 lbf) maximum downward force on cap
Manual Soldering: See Profile A in Supplement section.
Standards & Certifications
Flammability Standards:
UL & C-UL Recognized:
R
CSA Certified:
UL94V-0 housing & housing base
Single & double pole models recognized at 1A @ 125/250V AC, 1A @ 30V DC, & 0.4A @ 28V DC;
UL File No. WOYR2.E44145; add “/U” to end of part number to order UL mark on switch;
C-UL File No. WOYR8.E44145; add “/C-UL” to end of part number to order C-UL mark on switch
Single & double pole models recognized at 1A @ 125/250V AC, 1A @ 30V DC,
& 0.4VA @ 28V maximum; CSA File No. 023535-0-000;
add “/C” to end of part number to order CSA mark on switch.
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Miniature Pushbuttons
TYPICAL SWITCH ORDERING EXAMPLE
Series KB
FF
KB
POLES
1
2
SPDT
DPDT
2
5
C
SHAPES
K
W01
CAP COLORS
A
BB
CC
Black/None *
White/White
Red/Red
EB
FF
GG
Bushing Mounting
S
C
R
K
M
N
Square
Round
Rectangular
Square
Round
Rectangular
Yellow/White
Green/Green
Blue/Blue
* Black available in square and round only.
Note: Insert Cap with clear lens and colored
filter available;
see Illuminated Pushbuttons section
Snap-in Mounting
CIRCUITS
5
6
ON
ON
(ON)
ON
( ) = Momentary
Alternate Action
with Latchdown
HOUSING
K
Black only
CONTACTS & TERMINALS
W01
Silver Contacts and
Solder Lug Terminals
1A @ 125/250V AC
Gold Contacts and
Solder Lug Terminals
0.4VA @ 28V AC/DC
BARRIER TYPE
No
No Barrier
Code
B
With Barrier
G01
IMPORTANT:
Switches are supplied without UL,
C-UL & CSA marking unless speci-
fied. Specific models & ratings noted
on General Specifications page.
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
KB25CKW01-FF
Green Cap
Round with Bushing Mounting
Black Housing
DPDT
ON-(ON) Circuit
Silver Contacts and
Solder Lug Terminals;
Rated 1A @ 125/250V AC
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Miniature Pushbuttons
POLES & CIRCUITS
Plunger Position
( ) = Momentary
Normal
Pole
SP
DP
Model
KB15
*KB16
KB25
*KB26
ON
ON
ON
ON
(ON)
ON
(ON)
ON
2-3
2-3 5-6
2-1
2-1 5-4
Down
Connected Terminals
Normal
Down
Series KB
Throw & Schematics
Note: Terminal numbers are not actually
on the switch.
2 (COM)
SPDT
DPDT
3
3
2
(COM)
1
6
1
5
4
*
When in latchdown position for the alternate circuit, cap position is .055” (1.4mm) above the built-in bezel.
SHAPES & MOUNTING TYPES
Bushing Mounting
.551” (14.0mm)
Square
.551” (14.0mm)
Round
.551” x .728” (14.0mm x 18.5mm)
Rectangular
S
C
R
No barrier
With barrier
No barrier
With barrier
Bezel or barrier is an integral part of the switch body. One mounting nut AT057 supplied with each switch.
Snap-in Mounting
K
.551” (14.0mm)
Square
M
.551” (14.0mm)
Round
N
.551” x .728” (14.0mm x 18.5mm)
Rectangular
No barrier
With barrier
No barrier
Bezel or barrier is an integral part of the switch body.
Panel Cutouts
With barrier
Bushing Mounting
(1.8)
.071
(4.9)
.193
(12.3) Dia
.484
Snap-in Mounting
(1.2) R
.047
Without
Keyway
(12.3) Dia
.484
Panel Thickness:
.020” ~ .315”
(0.5 ~ 8.0mm)
With
Keyway
Panel Thickness:
.039” ~ .138”
(1.0 ~ 3.5mm)
(6.8)
.268
(12.3) Dia
.484
Panel thicknesses, when using optional accessories, are shown with the accessories at the end of this KB section.
Socket wrench AT108 may be used for bushing mounting. Overtightening the mounting nut may damage the switch housing.
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Miniature Pushbuttons
HOUSING
K
Housing available in black only.
Bezel or barrier is an integral part of the switch body.
Series KB
CONTACT MATERIALS, RATINGS & TERMINALS
W
G
Silver Contacts
Power Level
1A @ 125V AC & 250V AC
Logic Level
0.4VA maximum @ 28V AC/DC
01
Solder Lug
(2.0)
(1.8)
.079
.071
(1.0)
.039
Thk = (0.2) Com = (0.1)
.008
.005
(5.0)
.197
Gold Contacts
Complete explanation of operating range in Supplement section.
AT055 Crossover Guard
A partitioned plastic guard is supplied with each switch to provide insulation between terminals.
Installation steps:
1.
2.
3.
4.
Identify wire-to-terminal connections.
Thread wires through the guard.
Solder the connections.
Push the guard fully onto the switch body.
(12.4) Dia
.488
(14.0) Dia
.551
(17.0)
.669
Material: Polypropylene
BARRIER TYPE
No Code
No Barrier
Built-in bezel
B
With Barrier
Built-in barrier only available for square and rectangular
CAPS & CAP COLORS
Colors Available:
A
BB
CC
EB
FF
GG
Black (Not available in
Rectangular)
White/White
Red/Red
Yellow/White
Green/Green
Blue/Blue
AT485
Square
AT486
Round
AT4021
Rectangular
(11.6) Sq
.457
(4.5)
.177
(6.2)
.244
(11.6) Dia
.457
(4.5)
.177
(6.2)
.244
(11.6)
.457
(16.1)
.634
(4.5)
.177
(6.3)
.248
Material: Polycarbonate
Finish: Glossy
NKK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
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