Series DB Light Touch Miniature Pushbuttons
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C18
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
Pushbuttons
Illuminated PB
Slides Programmable Rockers
Touch Tilt Toggles
General Specifications
Electrical Capacity (Resistive Load)
Logic Level: 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: 50 milliohms maximum
Insulation Resistance: 1,000 megohms minimum @ 500V DC
Dielectric Strength: 1,000V AC minimum between contacts for 1 minute minimum;
1,500V AC minimum between contacts & case for 1 minute minimum
Mechanical Life: 200,000 operations minimum
Electrical Life: 100,000 operations minimum
Nominal Operating Force: Single Pole: 1.96N
Double Pole: 2.94N
Travel: Pretravel .020” (0.5mm); Overtravel .020” (0.5mm); Total Travel .039” (1.0mm)
Materials & Finishes
Plunger: Brass with nickel plating
Bushing: Brass with nickel plating
Frame: Stainless steel
Case: Glass fiber reinforced polyamide
Movable Contacts: Copper with gold plating
Stationary Contacts: Phosphor bronze with gold plating
Terminals: Brass with gold plating
Environmental Data
Operating Temp Range: –10°C through +70°C (+14°F through +158°F)
Humidity: 90 ~ 95% humidity for 96 hours @ 40°C (104°F)
Vibration: 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
Shock: 50G (490m/s2) acceleration (tested in 6 right angled directions, with 5 shocks in each direction)
Installation
Mounting Torque: 1.47Nm (13.0 lb•in) for double nut; 0.68Nm (6.0 lb•in) for single nut
Cap Installation Force: 78.5N (17.65 lbf) maximum downward force on actuator
PCB Processing
Soldering: Wave Soldering Recommended. See Profile A in Supplement section.
Manual Soldering: See Profile B in Supplement section.
Cleaning: These devices are not process sealed. Hand clean locally using alcohol based solution.
Standards & Certifications
The DB Series pushbuttons have not been tested for UL recognition or CSA certification.
These switches are designed for use in low-voltage, low-current, logic-level circuit.
When used as intended in a logic-level circuit, the results do not produce hazardous energy.
Series DB
Light Touch Miniature Pushbuttons
www.nkk.com C19
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
PushbuttonsIlluminated PBSlides Programmable Toggles
Rockers
Touch Tilt
Distinctive Characteristics
Both PCB and panel mounting options available.
Choice of cap sizes in .315” (8.0mm) and .394” (10.0mm)
diameter cap design for simple, snap-on installation.
High torque bushing prevents rotation and separation
from metal frame during installation.
Stainless steel frame resists corrosion.
Snap action contacts give smooth actuation, short
stroke, light touch, and audible feedback. This
mechanism also provides long mechanical life.
Molded-in terminals prevent entry of solder flux,
dust, and other contaminants.
.100” x .100” (2.54mm x 2.54mm) terminal spacing
conforms to standard PC board grid spacing. Round
terminals for easier through-hole mounting on PC boards.
Actual Size
Series DB Light Touch Miniature Pushbuttons
www.nkk.com
C20
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
Pushbuttons
Illuminated PB
Slides Programmable Rockers
Touch Tilt Toggles
TYPICAL SWITCH ORDERING EXAMPLE
21DB25
DPDT
ON-(ON) Circuit
Smooth Bushing &
Straight PC Terminals with Bracket
Poles & Circuits
11 SPDT ON (ON)
21 DPDT ON (ON)
( ) = Momentary
B
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
DB2521B with AT443E Cap
PC Terminals
Threaded Bushing
PStraight
Smooth Bushing
BStraight with Bracket
HRight Angle with Bracket
VVertical with Bracket
Yellow .315” (8.0mm)
Diameter Cap
Plunger Position
( ) = Momentary Connected Terminals Throw & Switch Schematics
Pole Model
Normal Down Normal Down
Note: Terminal numbers are not
actually on the switch.
SP DB2511 ON (ON) 3-1 3-2 SPDT
DP DB2521 ON (ON) 3-1 6-4 3-2 6-5 DPDT
POLES & CIRCUITS
Keyway
Keyway
6
4
3
12 5
(COM)
3
12
(COM)
Series DB
Light Touch Miniature Pushbuttons
www.nkk.com C21
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
PushbuttonsIlluminated PBSlides Programmable Toggles
Rockers
Touch Tilt
TYPICAL SWITCH DIMENSIONS
Single Pole Straight PC
Double Pole Straight PC
Single Pole Straight PC with Bracket
DB2511P with AT443C
DB2521P with AT442A
DB2511B with AT442C
Double Pole Straight PC with Bracket
DB2521B with AT443E
(7.0)
.276
(0.3)
.012
(14.7)
.579
(8.0)
.315
(8.8)
.346
(7.2)
.283
(17.5)
.689
(4.6)
.181
(0.8)
.031 Dia Typ
Dia
Keyway
M6 P0.75
(7.6)
.299
(5.08) Typ
.200
1
2
3
(14.7)
.579
(0.3)
.012
(0.3)
.012
(12.4)
.488
Keyway
(8.0)
.315
(8.8)
.346
(7.2)
.283
(17.5)
.689
(4.6)
.181
(5.08)
.200 Typ
(0.8)
.031
Dia Typ
Dia
M6 P0.75
(7.6)
.299
(5.08)
.200
1
2
3
4
5
6
(7.0)
.276
(16.44)
.647
(12.7)
.500
(0.3)
.012
(3.5)
.138
(8.0)
.315
(8.8)
.346
(6.8)
.268
(17.9)
.705
(4.6)
.181
(0.4) Typ
.016
(5.08) Typ
.200 (15.24)
.600
(0.8)
.031 Dia Typ
Dia
Keyway
(6.2)
.244
Dia
(7.6)
.299
(0.7)
.028
(5.08)
.200
(14.4)
.567
(0.3)
.012
Typ
1
2
3
4
5
6
(5.08)
.200
(7.0)
.276
(16.44)
.647
(3.5)
.138
(8.0)
.315
(8.8)
.346
(6.8)
.268
(17.9)
.705
(4.6)
.181
(5.08)
.200 (15.24)
.600
Typ
(0.8) Dia Typ
.031
Dia
Keyway
(6.2)
.244
Dia
(7.6)
.299
(0.4) Typ
.016
(5.08)
.200
(14.4)
.567
1
2
3
(0.7) Typ
.028
2
3
1
(5.08) Typ
.200
5
6
4
(5.08)
.200
(1.0) Dia Typ
.039
(7.62) Typ
.300
C
L
(2.54) Typ
.100
(1.0) Dia Typ
.039
2
3
1
(5.08) Typ
.200
(5.08)
.200
(7.62) Typ
.300
C
L
(2.54) Typ
.100
(1.0) Dia Typ
.039
2
3
1
(5.08) Typ
.200
5
6
4
(5.08)
.200
(1.0) Dia Typ
.039
2
3
1
(5.08) Typ
.200
Series DB Light Touch Miniature Pushbuttons
www.nkk.com
C22
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
Pushbuttons
Illuminated PB
Slides Programmable Rockers
Touch Tilt Toggles
TYPICAL SWITCH DIMENSIONS
Right Angle PC with Bracket Single Pole
DB2511H with AT442B
DB2521H with AT442A
Right Angle PC with Bracket Double Pole
Vertical PC with Bracket Single Pole
DB2511V with AT443C
DB2521V with AT443C
Vertical PC with Bracket Double Pole
(0.3)
.012
(5.08)
.200
(0.7)
.028 Typ
(7.0)
.276
(14.7)
.579
Keyway
(8.0)
.315
(8.8)
.346 (6.8)
.268
(15.24)
.600
Dia
(0.9)
.035
(0.4)
.016
(6.2)
.244
Dia
(7.6)
.299
(0.8) Dia
.031
1
(3.5)
.138
(6.5)
.256
23
(5.08) Typ
.200
(7.0)
.276
(5.08)
.200
(0.7)
.028
Typ
(14.7)
.579
(3.5)
.138
(0.3)
.012
(8.0)
.315
(8.8)
.346 (6.8)
.268 (15.24)
.600
Dia
(1.0)
.039
Keyway
(2.54)
.100
Typ
(0.5)
.020
(0.3)
.012 (3.5)
.138
(0.9)
.016
.035
(0.4)
(6.2)
.244
Dia
(7.6)
.299
3
2
1
(0.8)
.031
Dia
(14.4)
.567
(5.08)
.200
(0.7)
.028
Typ
(3.5)
.138
(12.7)
.500
(0.3)
.012
(8.0)
.315
(8.8)
.346
(6.8)
.268 (15.24)
.600
(2.54)
.100
Dia
(6.2)
.244
Dia
(0.9)
.035
(0.4)
.016
(0.8)
.031
(0.5)
.020 (3.5)
.138
(0.3)
.012
Dia Typ
(7.6)
.299
(5.08) Typ
.200
1
456
23
(14.4)
.579
(5.08)
.200
(0.7)
.028
Typ
(12.7)
.500
(0.3)
.012
(3.5)
.138
(0.3)
.012
(8.0) Dia
.315
(8.8)
.346 (6.8)
.268
(15.24)
.600
(1.0)
.039
(0.5)
.020
(0.3)
.012
(3.5)
.138
(0.9)
.016
.035
(0.4)
(6.2)
.244
Keyway
Dia
(2.54) Typ
.100
(7.6)
.299
(0.8)
.031
Dia Typ
(5.08)
.200
6
5
4
3
2
1
(1.0) Dia Typ
.039
2
3
1
(15.24)
.600
(2.54) Typ
.100
(5.08)
.200
5
6
4
(1.0) Dia Typ
.039
2
3
1
(15.24)
.600
(2.54) Typ
.100
C
L
(2.54) Typ
.100
(1.0) Dia Typ
.039
231
(15.24)
.600
(5.08) Typ
.200
C
L
564
(2.54)
.100
(2.54) Typ
.100
(1.0) Dia Typ
.039
23 1
(15.24)
.600
(5.08) Typ
.200
C
L
(2.54) Typ
.100
Series DB
Light Touch Miniature Pushbuttons
www.nkk.com C23
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
PushbuttonsIlluminated PBSlides Programmable Toggles
Rockers
Touch Tilt
HARDWARE
2 AT513M Metric Hexagon Nuts
1 AT509 Internal Tooth Lockwasher
AT513M
Metric Hexagon Nut
Material:
Brass with
Nickel Plating
AT509
Lockwasher
Material:
Steel with
Zinc/Chromate
AT507M
Metric Locking Ring
Material:
Steel with
Zinc/Chromate
(8.0)
.315
M6 P0.75
(9.0)
.354
(1.5)
.059
(2.0)
.079
(5.5)
.217
(6.0) Dia
.236
(12.0) Dia
.472
(1.7)
.067
(0.8)
.031
(6.4) Dia
.252 (10.2) Dia
.402
(0.5)
.020
Optional Hardware:
AT507M Metric Locking Ring
Standard Hardware Optional Hardware
OPTIONAL CAPS & COLORS
Cap Colors
Available:
A
B
C
AT443
.315” (8.0mm) Diameter Snap-on Cap AT442
.394” (10.0mm) Diameter Snap-on Cap
E
F
G
Cap Material: Polycarbonate Finish: Glossy
Cap Colors
Available:
A
B
C
E
F
G
Cap Material: Polycarbonate Finish: Glossy
Black
White
Red
Yellow
Green
Blue
Black
White
Red
Yellow
Green
Blue
(8.0) Dia
.315
(7.6)
.299
(8.0)
.315
(10.0) Dia
.394
Face Nut
Locking Ring
(Optional)
Lockwasher
Lock Nut
Without
Bottom Hex Nut
(6.35) Dia
.250
(5.6)
.220
(0.6)
.024
(6.35) Dia
.250
With
Standard Hardware
With Standard Hardware
& Optional Locking Ring
(6.5) Dia
.256
(6.5)
.256
(2.2) Dia
.087
AT501M
Metric Knurled Face Nut
Material:
Brass with
Chrome Plating
(1.7)
.067
M6 P0.75
(10.0) Dia
.394
Note: Cap must be snapped on
after the switch is mounted
into the panel.
INSTALLATION/ASSEMBLY PANEL CUTOUTS & THICKNESSES
Maximum Effective
Panel Thickness:
.185” (4.7mm)
Maximum Effective
Panel Thickness:
.118” (3.0mm)
Maximum Effective
Panel Thickness:
.087” (2.2mm)
