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
Polybutylene terephthalate (PBT) (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.nkkswitches.com
3/13/17
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.nkkswitches.com
Page C124
C117
Touch
Bushing Mount
Page C118
Tilt
Tactiles
Slides
Rotaries
Keylocks
Programmable Illuminated PB
Pushbuttons
Rockers
Series MB2500
Toggles
Snap-Action Bushing Mount Pushbuttons
TYPICAL SWITCH ORDERING EXAMPLE
Pushbuttons
Rockers
MB25
C
11
21
11
(ON)
(ON)
S4
W
01
B
C
B
Caps
.315” (8.0mm)
Diameter
.394” (10.0mm)
Diameter
C
Poles & Circuits
SPDT
DPDT
ON
ON
W
G
Contact Materials
& Ratings
Silver
Rated 3A @ 125V AC
Gold
Rated 0.4VA max @
28V AC/DC max
Programmable Illuminated PB
( ) = Momentary
Keylocks
Bushing
S4
.315” (8.0mm)
Threaded with Keyway
01
03
Terminals
Solder Lug
.250” (6.35mm)
Straight PC
Cap Colors
A
B
C
E
F
G
Black
White
Red
Yellow
Green
Blue
Rotaries
IMPORTANT:
Slides
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 instructions are noted on the General
Specifications page.
Tilt
Tactiles
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
Touch
MB2511S4W01-BC
Indicators
Red .315” (8.0mm)
Diameter Cap
SPDT ON-(ON) Circuit
Silver Contacts with
3-Amp Rating
Accessories
.315” (8.0mm) Threaded
Bushing with Keyway
Solder Lug Terminals
Supplement
C118
www.nkkswitches.com
Snap-Action Bushing Mount Pushbuttons
POLES & CIRCUITS
Plunger Position
( ) = Momentary
Normal
Pole
Model
Keyway
Series MB2500
Throw & Switch Schematics
Note: Terminal numbers are
not actually on the switch.
3 (COM)
Connected Terminals
Normal
Keyway
Down
Down
SP
MB2511
ON
(ON)
3-1
3-2
SPDT
1
3 (COM)
1
2
4
2
6
5
C
DP
MB2521
ON
(ON)
3-1 6-4
3-2 6-5
DPDT
BUSHING
S4
.315” (8.0mm)
Threaded with Keyway
(0.6)
.024
(8.0)
.315
(2.85) Dia
.112
M6 P0.75
(7.8)
.307
(8.0)
.315
(0.8)
.031
Panel Cutouts
Without Keyway
With Keyway
(5.6)
.220
(6.5) Dia
.256
(0.6)
.024
With Optional Locking Ring
Slides
(6.5) Dia
.256
Maximum Panel Thickness with Standard Hardware: .134” (3.4mm)
Standard Hardware
AT513M Threaded
Hex Nut
(8.0)
.315
M6 P0.75
Optional Hardware
AT509
Lockwasher
(6.4) Dia
.252
AT507M
Locking Ring
Steel with
zinc/chromate
(0.9)
.035
(2.0)
.079
(5.5) or
.229
(9.0)
.354
(10.2) Dia
.402
(0.5)
.020
Brass with
nickel plating
Steel with
zinc/chromate
(0.8)
.031
(12.0) Dia
.472
CONTACT MATERIALS & RATINGS
W
G
Silver over Silver
Power Level
3A @ 125V AC
Note: Complete explanation of operating range in Supplement section.
www.nkkswitches.com
C119
Supplement
Gold over Brass or Copper
Logic Level
0.4VA maximum @ 28V AC/DC maximum
Accessories
Indicators
Touch
2 included
with each switch
(1.5)
.059
1 included
with each switch
.250 Dia
or 6.0mm
Tilt
Tactiles
(6.5) Dia
.256
(2.2) Dia
.087
(6.5)
.256
Rotaries
Keylocks
Programmable Illuminated PB
Pushbuttons
Rockers
Toggles
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