Series MB2400 Snap-Action Pushbuttons
C96
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
Pushbuttons
Illuminated PB
Slides Programmable Rockers
Touch Tilt Toggles
www.nkkswitches.com
General Specifications
Electrical Capacity (Resistive Load)
Power Level (silver): 3A @ 125V AC
Logic Level (gold): 0.4VA maximum @ 28V AC/DC maximum (Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V)
Logic/Power Level: Combines silver & gold ratings
(gold over silver) Note: Find additional explanation of dual rating & operating range in Supplement section.
Other Ratings
Contact Resistance: 20 milliohms maximum for silver; 30 milliohms maximum for gold
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: 25,000 operations minimum for silver; 100,000 operations minimum for gold
Nominal Operating Force: Single pole 2.45N; double pole 3.92N
Travel Pretravel .024” (0.6mm); Overtravel .016” (0.4mm); Total Travel .039” (1.0mm)
Materials & Finishes
Plunger: Brass with nickel plating
Bushing: Brass with nickel plating
Frame: Stainless steel
Case: Polybutylene terephthalate (PBT) (UL94V-0)
Base: Diallyl phthalate resin (UL94V-0)
Movable Contactor: Phosphor bronze with silver or gold plating
Movable Contacts: Silver alloy (code W); copper with gold plating (code G); or silver alloy with gold plating (code A)
Stationary Contacts: Silver alloy with silver plating (code W); copper or brass with gold plating (code G); or
silver with gold plating (code A)
Terminals: Copper or brass with silver plating; copper or brass with gold plating
Environmental Data
Operating Temp Range: –30°C through +85°C (–22°F through +185°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 3 shocks in each direction)
Installation
Mounting Torque: 1.5Nm (13.0 lbin) for double nut; 0.7Nm (6.0 lbin) for single nut
Cap Installation Force: 80.0N (18.0 lbf) maximum downward force on actuator
Soldering: Wave Soldering (PC version): See Profile B 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.
See Cleaning Specifications in Supplement section.
Standards & Certifications
Flammability Standards: UL94V-0 case & base
UL: 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 and double pole models recognized at 3A @ 125V AC or 0.4VA max. @ 28V DC max.
CSA: 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 models with PC, solder lug, or Wirewrap terminals & double pole with PC or
Wirewrap terminals certified at 3A @ 125V AC or 0.4VA @ 28V maximum.
Series MB2400
Snap-Action Pushbuttons
C97
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
PushbuttonsIlluminated PBSlides Programmable Toggles
Rockers
Touch Tilt
www.nkkswitches.com
Distinctive Characteristics
Snap-acting mechanism gives smooth actuation, short stroke,
light touch, and audible feedback. This mechanism also provides
long mechanical life.
High torque bushing construction prevents rotation or separation
from frame during installation.
Antijamming design protects contacts from damage due to
excessive downward force on the actuator.
Compatible companions with M series toggles. Body,
bushing, and footprint dimensions ideal for mounting
MB2400 pushbuttons and M toggles next to one another.
Stainless steel frame resists corrosion.
Longer center solder lug terminal simplifies wiring and
soldering.
Silver contacts of specially composed alloy for hardness.
Epoxy sealed terminals prevent entry of solder flux and other
contaminants.
Prominent external insulating barriers increase insulation resistance
and dielectric strength.
Actual Size Bushing Mount Page C98
Bracket PC Mount Page C102
Snap-in Mount Page C108
Series MB2400 Snap-Action Bushing Mount Pushbuttons
C98
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
Pushbuttons
Illuminated PB
Slides Programmable Rockers
Touch Tilt Toggles
www.nkkswitches.com
Cap Colors
ABlack
BWhite
CRed
TYPICAL SWITCH ORDERING EXAMPLE
AFMB24
SPDT ON-(ON) Circuit
Solder Lug Terminals
Poles & Circuits
11 SPDT ON (ON)
61 DPDT ON (ON)
( ) = Momentary
W
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
MB2411E1W01-FA
Caps
F.201” (5.1mm)
Diameter
H.295” (7.5mm)
Diameter
Contact Materials
& Ratings
WSilver
Rated 3A @ 125V AC
G
Gold
Rated 0.4VA max @
28V AC/DC max
A
Gold over Silver
Rated 3A @ 125V AC
& 0.4VA max @ 28V
AC/DC max
E1 01
Bushings
E1 .285” (7.24mm)
Threaded with D Flat
E2 .285” (7.24mm)
Smooth with D Flat
A1 .280” (7.1mm)
Threaded with Keyway
A2 .280” (7.1mm)
Smooth with Keyway
S1 .350” (8.9mm)
Threaded with Keyway
S2 .350” (8.9mm)
Smooth with Keyway
Terminals
01 Solder Lug
03 .250” (6.35mm) Straight PC
05 .425” (10.8mm) Wirewrap
06 .750” (19.05mm) Wirewrap
07 .964” (24.5mm) Wirewrap
Black .201” (5.1mm)
Diameter Cap
Silver Contacts with
3-Amp Rating
.285” (7.24mm) Threaded Bushing
with D Flat
11
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 instructions are noted on the General
Specifications page.
Series MB2400
Snap-Action Bushing Mount Pushbuttons
C99
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
PushbuttonsIlluminated PBSlides Programmable Toggles
Rockers
Touch Tilt
www.nkkswitches.com
BUSHINGS
.280” (7.1mm)
Threaded with Keyway
.285” (7.24mm)
Threaded with D Flat
E1 A1 .350” (8.9mm)
Threaded with Keyway
S1
Maximum Panel Thickness with
Standard Hardware: .068” (1.74mm)
Maximum Panel Thickness with
Standard Hardware: .134” (3.40mm)
For A1, A2, S1, or S2 Bushing
with Keyway
For E1 or E2 Bushing
with D Flat
With
Optional Locking Ring
Standard hardware includes 2 hex nuts & 1 lockwasher.
Hardware is illustrated following the Typical Switch Dimension drawings.
(5.8)
.228
(6.5) Dia
.256
Panel Cutouts
Maximum Panel Thickness with
Standard Hardware: .068” (1.74mm)
.280” (7.1mm)
Smooth with Keyway
.285” (7.24mm)
Smooth with D Flat
E2 A2 .350” (8.9mm)
Smooth with Keyway
S2
Plunger Position
( ) = Momentary Connected Terminals Throw & Switch Schematics
Pole Model
Normal Down Normal Down Note: Terminal numbers are not
actually on the switch.
SP MB2411 ON (ON) 1-3 1-2 SPDT
DP MB2461 ON (ON) 1-3 4-6 1-2 4-5 DPDT
POLES & CIRCUITS
Keyway
Keyway
1
32
(COM)
4
6
1
32 5
(COM)
(8.0) Dia
.315
(2.5)
.098
(2.84) Dia
.112
1/4-40 Thd
(5.54)
.218
(7.24)
.285
(0.9)
.035
(8.0) Dia
.315
1/4-40 Thd
(2.84) Dia
.112
(0.9)
.035
(7.1)
.280
(5.54)
.218
(0.8)
.031
(2.5)
.098
(8.0) Dia
.315
(0.9)
.035
(8.9)
.350
(5.54)
.218
1/4-40 Thd
(2.84) Dia
.112
(2.5)
.098
(0.8)
.031
(8.0) Dia
.315
(5.54)
.218
(8.9)
.350
(0.9)
.035
(6.2) Dia
.244
(2.84) Dia
.112
(2.5)
.098
(0.8)
.031
(2.5)
.098
(0.8)
.031
.244
(2.84) Dia
.112
.035
(7.1)
(5.54)
(6.2) Dia
.244
(2.84) Dia
.112
(0.9)
.035
(7.24)
.285
(5.54)
.218
(8.0) Dia
.315
(2.5)
.098
Note: Plunger selection is not required for MB2400 pushbuttons. The plunger can be used with or without a cap.
(6.5) Dia
.256
(5.8)
.228
(0.6)
.024
(6.5) Dia
.256
(6.1)
.240
(2.2) Dia
.087
Series MB2400 Snap-Action Bushing Mount Pushbuttons
C100
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
Pushbuttons
Illuminated PB
Slides Programmable Rockers
Touch Tilt Toggles
www.nkkswitches.com
Note: This dual rated option is suitable when two or more identical switches are used in logic and in power circuits
within the same application. See Supplement section for complete explanation of dual rating and operating range.
W
Gold over Brass or Copper Logic Level 0.4VA maximum @ 28V AC/DC maximum
Silver over Silver Power Level 3A @ 125V AC
Gold over Silver
G
CONTACT MATERIALS & RATINGS
Note: Complete explanation of operating range in Supplement section.
Power Level 3A @ 125V AC
or Logic Level or 0.4VA maximum @ 28V AC/DC maximum
CAPS & CAP COLORS
FAT475
.201” (5.1mm)
Diameter Cap
AT496
.295” (7.5mm)
Diameter Cap
H
Cap Colors
Available: AB C
Black White Red
Material: Polyamide
Finish: Glossy
Material: Polyamide
Finish: Glossy
TERMINALS
Solder Lug
01
.425”
(10.8mm)
05
.750”
(19.05mm)
06
.964”
(24.5mm)
07
Refer to footprints if using
as extended PC terminal.
Dimension A = terminal
lengths as shown beside
the code boxes at left. Single Pole Double Pole
.250” (6.35mm)
Straight PC
03
Epoxy Seal
(4.8)
.189
(6.35)
.250
(1.17)
.046
Thk = (0.8)
.031
Thk = (0.8)
.031
Epoxy Seal
A
(1.27)
.050
(4.7) Typ
.185
(1.8) Dia Ty
p
.073
1
2
3
(4.7) Ty
p
.185
(4.8)
.189
(1.8) Dia Typ
.073
1
2
36
5
4
Epoxy Seal
(2.0)
.079 (2.0)
.079
(4.0)
.157
(1.1)
.043
Thk = (0.8)
.031
(5.1) Dia
.201
(4.0)
.157
(6.4)
.253
(7.5) Dia
.295
(4.0)
.157
(6.4)
.253
A
Wirewrap or Extended PC
Series MB2400
Snap-Action Bushing Mount Pushbuttons
C101
Indicators
AccessoriesSupplement Tactiles KeylocksRotaries
C
PushbuttonsIlluminated PBSlides Programmable Toggles
Rockers
Touch Tilt
www.nkkswitches.com
TYPICAL SWITCH DIMENSIONS
Single Pole Solder Lug
Double Pole Solder Lug
MB2411E1W01-FA
MB2461E1W01-FA
HARDWARE
AT515
Locking Ring
for E1 Bushing
Material:
Steel with Zinc/Chromate
AT509
Lockwasher
1 included with each switch
Material:
Steel with Zinc/Chromate
(6.4) Dia
.252
(10.2) Dia
.402
(0.5)
.020
Standard Hardware
Optional Hardware
AT513H Inch Threaded
Hexagon Nut
2 included with each switch
Material:
Brass with Nickel Plating
(5.5)
.217 (6.2) Dia
.244
(12.0) Dia
.472
(2.0)
.079
(1.68)
.066
(0.8)
.031
(1.7)
.067 (0.8)
.031
(8.0)
.315
1/4-40 Thd
(9.0)
.354
(1.5)
.059
Flat
(13.0)
.512
(2.4)
.096
(5.1) Dia
.201
(2.84) Dia
.112
(0.8) Typ
.031
(4.7) Typ
.185
(1.1) x (2.0) Typ
.043 x .079
(4.0)
.157
(4.5)
.177
(0.9)
.035
1/4-40 Thd
(6.4)
.253
(7.24)
.285
(14.0)
.552
3
2
1
NC
NO
COM
(2.0)
.079
(7.9)
.311
Flat
(13.0)
.512
1/40-40 Thd
(6.4)
.253
(7.24)
.285
(14.0)
.552
(4.0)
.157
(4.5)
.177
(0.9)
.035
(5.1) Dia
.201
(2.84) Dia
.112
(2.4)
.096 (0.8) Typ
.031
(4.7) Typ
.185
(1.1) x (2.0) Typ
.043 x .079
4
6
5
1
2
3
NC
NO
COM
(12.7)
.500
(2.0) Ty
p
.079
(4.8)
.189
AT507H
Locking Ring
for A1 or S1 Bushing
Material:
Steel with Zinc/Chromate
(2.0)
.079
(5.8)
.229
(6.35) Dia
.250
(12.0) Dia
.472