Series MB2500
Snap-Action Pushbuttons
General
Specifications
Electrical Capacity (Resistive Load)
Power Level (code W):
Logic Level (code G):
Rockers
Toggles
Pushbuttons
C
Logic/Power Level (code A):
3A @ 125V AC
0.4VA maximum @ 28V AC/DC maximum
(Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V)
Combines W & G ratings
Note: See Supplement section to find explanation of operating range.
Programmable Illuminated PB
Other Ratings
Contact Resistance:
Insulation Resistance:
Dielectric Strength:
Mechanical Life:
Electrical Life:
Nominal Operating Force:
Travel:
20 milliohms maximum for silver; 30 milliohms maximum for gold
1,000 megohms minimum @ 500V DC
1,000V AC minimum between contacts for 1minute minimum;
1,500V AC minimum between contacts & case for 1minute minimum
200,000 operations minimum
25,000 operations minimum for silver; 100,000 operations minimum for gold
Single pole 2.45N; double pole 3.92N
Pretravel .024” (0.6mm); Overtravel .016” (0.4mm); Total Travel .039” (1.0mm)
Keylocks
Materials & Finishes
Slides
Plunger:
Bushing:
Mounting & Body Frames:
Support Bracket:
Case:
Base:
Movable Contactor:
Movable Contacts:
Stationary Contacts:
Terminals:
Brass with nickel plating
Brass with nickel plating
Stainless steel
Brass with tin plating
Glass fiber reinforced polyester (UL94V-0)
Diallyl phthalate resin
Phosphor bronze with silver or gold plating
Silver alloy (code W); copper with gold plating (code G)
Silver with silver plating (code W); copper or brass with gold plating (code G)
Copper with silver plating; copper or brass with gold plating
Rotaries
Environmental Data
Tactiles
Operating Temp Range:
Humidity:
Vibration:
Shock:
–30°C through +85°C (–22°F through +185°F)
90 ~ 95% humidity for 100 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)
Tilt
Installation
Mounting Torque:
Cap Installation Force:
1.5Nm (13 lb
•
in) for double nut; 0.7Nm (6 lb
•
in) for single nut
80N (18 lbf) maximum downward force on actuator
Touch
Processing
Soldering:
Cleaning:
Indicators
Wave Soldering Recommended: See Profile B in Supplement section.
Manual Soldering: See Profile B in Supplement section.
These devices are not process sealed. Hand clean locally using alcohol based solution.
Standards & Certifications
Flammability Standards:
UL :
CSA:
Supplement
UL94V-0 Case
File No. E44145 - Recognized only when ordered with marking on switch.
Add “/U” or “/CUL” before dash in part number to order UL recognized switch.
All single & double pole models recognized at 3A @ 125V AC or 0.4VA max. @ 28V AC/DC max.
File No. 023535_0_000 - Certified only when ordered with marking on switch.
Add “/C” before dash in part number to order CSA certified switch.
Single pole & double pole models certified at 3A @ 125V AC or 0.4VA max. @ 28V AC/DC max.
Accessories
C116
www.nkk.com
Snap-Action Pushbuttons
Series MB2500
Toggles
Distinctive
Characteristics
Short stroke and light touch.
Antijamming design protects contacts from damage due
to excessive downward force on the actuator.
High torque bushing construction prevents rotation or
separation from frame during installation.
Stainless steel frame resists corrosion.
Longer center solder lug terminal
simplifies wiring and soldering.
Patented silver contacts of specially
composed alloy for hardness.
Epoxy sealed terminals prevent entry
of solder flux and other contaminants.
Snap-acting mechanism gives smooth
actuation and audible feedback.
Prominent external insulating barriers increase
insulation resistance and dielectric strength.
C
Actual Size
Indicators
Supplement
Accessories
Bracket PC Mount
Page C121
Snap-in Mount
www.nkk.com
Page C124
C117
Touch
Bushing Mount
Page C118
Tilt
Tactiles
Slides
Rotaries
Keylocks
Programmable Illuminated PB
Pushbuttons
Rockers
Snap-Action Bracket PC Mount Pushbuttons
Series MB2500
13
B
C
TYPICAL SWITCH ORDERING EXAMPLE
Poles & Circuits
11
21
SPDT
DPDT
ON
ON
(ON)
(ON)
W
G
Contact Materials
& Ratings
Silver
Rated 3A @ 125V AC
Gold
Rated 0.4VA max @
28V AC/DC max
Caps
.315” (8.0mm)
Diameter
.394” (10.0mm)
Diameter
C
( ) = Momentary
S2
.300” (7.6mm)
Smooth with Keyway
13
30
45
.250” (6.35mm) Straight PC
with Bracket
Right Angle (Single Pole only)
Vertical PC
A
B
C
E
F
G
Black
White
Red
Green
Blue
Yellow
IMPORTANT:
Switches are supplied without UL,
cULus & CSA marking unless specified.
UL, cULus & CSA recognized only when
ordered with marking on the switch.
Specific models, ratings, & ordering in-
structions are noted on General Specifi-
cations page.
MB2511S2G13-BC
Red .315” (8.0mm)
Diameter Cap
SPDT ON-(ON) Circuit
Gold Contacts with
0.4VA Rating
.300” (7.6mm) Smooth
Bushing with Keyway
.250” (6.35mm) Straight PC
Terminals with Bracket
www.nkk.com
C121
Supplement
Accessories
Indicators
Touch
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
Tilt
Tactiles
Slides
Rotaries
Keylocks
Bushing
Terminals
Cap Colors
Programmable Illuminated PB
Pushbuttons
Rockers
MB25
11
S2
G
B
C
Toggles
Series MB2500
Toggles
Snap-Action Bracket PC Mount Pushbuttons
POLES & CIRCUITS
Plunger Position
( ) = Momentary
Rockers
Connected Terminals
Normal
Keyway
Throw & Switch Schematics
Note: Terminal numbers are
not actually on the switch.
3 (COM)
1
2
Normal
Pole
Model
Keyway
Down
Down
Pushbuttons
C
SP
MB2511
ON
(ON)
3-1
3-2
SPDT
Programmable Illuminated PB
DP
MB2521
ON
(ON)
3-1 6-4
3-2 6-5
DPDT
1
3 (COM)
2
4
6
5
BUSHING
S2
.300” (7.6mm)
Smooth with Keyway
(0.6)
.024
(3.0)
.118
(6.2) Dia
.244
Keylocks
Panel Cutout
(5.6)
.220
Rotaries
(8.0)
.315
(7.8)
.307
(7.6)
.300
(0.9)
.035
(6.5) Dia
.256
(0.6)
.024
CONTACT MATERIALS & RATINGS
Slides
W
G
Silver over Silver
Power Level
3A @ 125V AC
Tactiles
Gold over Brass or Copper
Logic Level
0.4VA maximum @ 28V AC/DC maximum
Note: Complete explanation of operating range in Supplement section.
Tilt
TERMINALS
13
.250” (6.35mm) Terminal
with .465” (11.8mm) Bracket
30
Indicators
Touch
Right Angle PC
Single Pole only
45
Vertical PC
Accessories
(1.6) Typ
.063
3
2
1
(1.6) Typ
.063
(2.4) Typ
.095
3
2
1
6
5
4
3
2
(4.7) Typ
.185
1
(2.54) Typ
.100
3
2
1
(2.54) Typ
.100
(4.8)
.189
3
2
1
6
5
4
(7.9) Typ
.311
(4.7) Typ
.185
(1.8) Dia Typ
.073
(1.5) Dia Typ
.059
(7.9) Typ
.311
(4.7) Typ
.185
(1.8) Dia Typ
.073
(1.5) Dia Typ
.059
(12.7)
.500
(1.8) Dia Typ
.073
(2.54) Typ
.100
(12.7)
.500
(12.7)
.500
Supplement
C
L
(2.54) Typ
.100
(1.8) Dia Typ
.073
(2.54) Typ
.100
(1.8) Dia Typ
.073
C122
www.nkk.com
Snap-Action Bracket PC Mount Pushbuttons
CAPS & CAP COLORS
B
AT443
.315” (8.0mm) Diameter Cap
(8.0) Dia
.315
Series MB2500
AT442
.394” (10.0mm) Diameter Cap
(10.0) Dia
.394
C
Material: Polycarbonate
Finish: Glossy
Cap Colors
Available:
Finish: Glossy
C
F
Green
Black
White
Red
Yellow
Blue
TYPICAL SWITCH DIMENSIONS
Single Pole
(3.2)
.126
Double Pole
(3.2)
.126
Straight PC • Bracket
Keyway
(4.7) Typ
.185
(15.8)
.622
3
COM
NO
NC
(13.0)
.512
6
5
4
3
2
1
COM
NO
NC
(1.17) Typ
.046
(13.0)
.512
2
1
(0.9)
.035
(8.0)
.315
(8.8)
.346
(8.5)
.335
(16.6)
.654
(4.8)
.189
(1.17)
.146
(7.9)
.311
(4.8)
.189
(12.7)
.500
MB2511S2G13-BC
Single Pole
(8.0) Dia
.315
(3.0) Dia
.118
(1.2)
.047
(6.2) Dia
.244
(7.9)
.311
(2.9)
.114
(5.08)
.200
(13.0)
.512
(4.3)
.169
(1.4) Typ
.055
(8.8)
.346
(7.6)
.299
(8.7)
.342
(0.4)
.016
(1.27)
.500
(1.27)
.050
(0.8) Typ
.031
(4.7) Typ
.185
NC NO COM
1
2
3
Right Angle PC
Keyway
Single Pole
Keyway
(8.0) Dia
.315
(3.0) Dia
.118
(1.2)
.047
(6.2) Typ
.244
3
Double Pole
Vertical PC
COM
NO
NC
6
5
4
3
2
1
COM
NO
NC
(1.27) Typ
.050
(4.8)
.189
1
(8.8)
.346
(8.7)
.342
(7.9)
.311
(12.7)
.500
MB2511S2G45-BC
www.nkk.com
C123
Supplement
(1.4) Typ
.055
(5.08)
.200
(7.6)
.299
(0.4)
.016
(12.7)
.500
(2.7)
.106
(0.8) Typ
.031
(2.54) Typ
.100
(1.27)
.050
Accessories
(13.0)
.512
2
Indicators
Touch
MB2511S2G30-BC
Tilt
Tactiles
Slides
Rotaries
(0.5) Typ
.020
Keylocks
(8.0) Dia
.315
(3.0) Dia
.118
(1.2)
.047
(6.2) Dia
.244
(6.35)
.250
(0.8) Typ
.031
(1.17) Typ
.046
(1.17) Typ
.046
Programmable Illuminated PB
A
B
C
E
G
Pushbuttons
(8.8)
.346
(7.6)
.299
Material: Polycarbonate
(9.0)
.354
(8.0)
.315
Rockers
Toggles
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