Snap-Action Pushbuttons
Series MB2400
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
N KK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Snap-Action Pushbuttons
Series MB2400
General Specifications
Electrical Capacity (Resistive Load)
Power Level (code W): Logic Level (code G): 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: Find additional explanation of dual rating & operating range in Supplement section.
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 1 minute minimum; 1,500V AC minimum between contacts & case for 1 minute 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)
Materials & Finishes
Plunger: Bushing: Frame: Case: Base: Movable Contactor: Movable Contacts: Stationary Contacts: Terminals:
Brass with nickel plating Brass with nickel plating Stainless steel Polybutylene terephthalate (PBT) Diallyl phthalate resin Phosphor bronze with silver or gold plating Silver alloy (code W); copper with gold plating (code G); or silver alloy with gold plating (code A) Silver alloy with silver plating (code W); copper or brass with gold plating (code G); or silver with gold plating (code A) Copper or brass with silver plating; copper or brass with gold plating
Environmental Data
Operating Temp Range: Humidity: Vibration: Shock:
–30°C through +85°C (–22°F through +185°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/s2) acceleration (tested in 6 right angled directions, with 3 shocks in each direction)
Installation
Mounting Torque: Cap Installation Force: Soldering: Cleaning:
1.5Nm (13.0 lb • in) for double nut; 0.7Nm (6.0 lb • in) for single nut 80.0N (18.0 lbf) maximum downward force on actuator Wave Soldering (PC version): 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. See Cleaning Specifications in Supplement section.
Standards & Certifications
Flammability Standards: UL & C-UL Recognized:
R
CSA Certified:
UL94V-0 available All single and double pole models recognized at 3A @ 125V AC or 0.4VA max. @ 28V DC max; 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 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; CSA File No. 023535-0-000; add “/C” to end of part number to order CSA mark on switch.
03-07
N KK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
Snap-Action Bushing Mount
Series MB2400 F
CAPS
F H .201” (5.1mm) Diameter .295” (7.5mm) Diameter
TYPICAL SWITCH ORDERING EXAMPLE
MB24
POLES & CIRCUITS
11 61 SPDT DPDT ON ON
11
E1
W
01
A
(ON) (ON)
C ONTACT MATERIALS & R ATINGS
W G Silver Rated 3A @ 125V AC Gold Rated 0.4VA max @ 28V AC/DC max Gold over Silver Rated 3A @ 125V AC & 0.4VA max @ 28V AC/DC max
( ) = Momentary
A
BUSHINGS
E1 E2 A1 A2 S1 S2 .285” (7.24mm) Threaded with D Flat .285” (7.24mm) Smooth with D Flat .280” (7.1mm) Threaded with Keyway .280” (7.1mm) Smooth with Keyway .350” (8.9mm) Threaded with Keyway .350” (8.9mm) Smooth with Keyway 01 03 05 06 07
CAP COLORS
A B C Black White Red
TERMINALS
Solder Lug .250” (6.35mm) Straight PC .425” (10.8mm) Wirewrap .750” (19.05mm) Wirewrap .964” (24.5mm) Wirewrap
IMPORTANT:
Switches are supplied without UL, C-UL, & CSA markings unless specified. Specific models & ratings noted on General Specifications page.
DESCRIPTION FOR TYPICAL ORDERING EXAMPLE
MB2411E1W01-FA
Black .201” (5.1mm) Diameter Cap .285” (7.24mm) Threaded Bushing with D Flat
SPDT ON-(ON) Circuit Silver Contacts with 3-Amp Rating
Solder Lug Terminals
N KK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Snap-Action Bushing Mount
P OLES & CIRCUITS
Plunger Position ( ) = Momentary Normal Pole SP Model MB2411
Keyway
Series MB2400
Throw & Switch Schematics Note: Terminal numbers are not actually on the switch.
1 (COM)
Connected Terminals Normal
Keyway
Down
Down
ON
(ON)
1-3
1-2
SPDT
3 1 (COM) 3 2 6
2 4 5
DP
MB2461
ON
(ON)
1-3 4-6
1-2 4-5
DPDT
BUSHINGS
Note: Plunger selection is not required for MB2400 pushbuttons. The plunger can be used with or without a cap.
E1
.285” (7.24mm) Threaded with D Flat
A1
.280” (7.1mm) Threaded with Keyway
(0.8) .031
S1
(0.8) .031 (8.0) Dia .315 (0.9) .035
.350” (8.9mm) Threaded with Keyway
1/4-40 Thd (2.84) Dia .112 (8.0) Dia .315 (2.5) .098 (0.9) .035
1/4-40 Thd (2.84) Dia .112 (2.5) .098 (5.54) (7.1) .218 .280
1/4-40 Thd (2.84) Dia .112 (2.5) .098 (5.54) .218 (8.9) .350 (0.9) .035
(8.0) Dia .315
(5.54) (7.24) .218 .285
Maximum Panel Thickness with Standard Hardware: .068” (1.74mm) .285” (7.24mm) Smooth with D Flat
Maximum Panel Thickness with Standard Hardware: .068” (1.74mm) .280” (7.1mm) Smooth with Keyway
(6.2) Dia .244 (2.84) Dia .112 (2.5) .098 (5.54) (7.1) .218 .280 (0.9) .035
Maximum Panel Thickness with Standard Hardware: .134” (3.40mm) .350” (8.9mm) Smooth with Keyway
E2
A2
S2
(0.8) .031 (8.0) Dia .315
(6.2) Dia .244 (2.84) Dia .112 (8.0) Dia .315 (2.5) .098 (0.9) .035
(0.8) .031 (8.0) Dia .315
(6.2) Dia .244 (2.84) Dia .112 (2.5) .098 (5.54) .218 (8.9) .350 (0.9) .035
(5.54) (7.24) .218 .285
Panel Cutouts For A1, A2, S1, or S2 Bushing with Keyway For E1 or E2 Bushing with D Flat With Optional Locking Ring
(5.6) .220 (6.5) Dia .256 (0.6) .024 (6.5) Dia .256
(5.8) .228
Standard hardware includes 2 hex nuts & 1 lockwasher. Hardware is illustrated following the Typical Switch Dimension drawings.
(6.5) Dia .256 (2.2) Dia .087
(6.5) .256
N KK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Snap-Action Bushing Mount
CONTACT MATERIALS & RATINGS W G
Silver over Silver Power Level
Series MB2400
3A @ 125V AC
Gold over Brass or Copper
Logic Level
0.4VA maximum @ 28V AC/DC maximum
Note: Complete explanation of operating range in Supplement section.
A
Gold over Silver
Power Level or Logic Level
3A @ 125V AC or 0.4VA maximum @ 28V AC/DC maximum
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.
TERMINALS 01
Solder Lug
03
.250” (6.35mm) Straight PC
05 06 07
.425” (10.8mm) Wirewrap or Extended PC .750” (19.05mm) Wirewrap or Extended PC .964” (24.5mm) Wirewrap or Extended PC
Epoxy Seal (2.0) .079
(4.0) .157
Epoxy Seal
(6.35) (4.8) .250 .189
(2.0) (1.1) .079 .043 Thk = (0.8) .031
(1.17) .046 Thk = (0.8) .031
3 2 1
3
(4.8) .189
6 5 4
(4.7) Typ .185 (1.8) Dia Typ .073
2 1
(4.7) Typ .185
Refer to the footprints if using as extended PC terminal. Dimension A = terminal lengths as shown beside the code boxes above.
Epoxy Seal
A
(1.27) .050 Thk = (0.8) .031
(1.8) Dia Typ .073
Single Pole
Double Pole
CAPS & CAP COLORS F
AT475 .201” (5.1mm) Diameter Cap
H
(5.1) Dia .201 (6.4) .253 (4.0) .157
AT496 .295” (7.5mm) Diameter Cap
(7.5) Dia .295 (6.4) .253
(4.0) .157
Material: Polyamide Finish: Glossy
Material: Polyamide Finish: Glossy
Cap Colors Available:
A
Black
B
White
C
Red
N KK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
Snap-Action Bushing Mount
TYPICAL SWITCH DIMENSIONS
Solder Lug Single Pole
Series MB2400
Flat
(5.1) Dia .201 (2.84) Dia .112
(2.4) .096
(1.1) x (2.0) Typ .043 x .079 (0.8) Typ .031 (4.7) Typ .185
NC NO COM
3 2 1
(13.0) .512
1/4-40 Thd (6.4) .253 (7.24) .285 (0.9) (4.5) .035 .177 (14.0) .552
(4.0) .157 (7.9) .311
(2.0) .079
MB2411E1W01-FA
Solder Lug
Double Pole
(1.1) x (2.0) Typ .043 x .079 (0.8) Typ .031 (4.7) Typ .185 1/40-40 Thd (6.4) .253 (7.24) .285 (0.9) (4.5) .035 .177 (14.0) .552 (4.0) .157
Flat
(5.1) Dia .201 (2.84) Dia .112
(2.4) .096
NC NO COM
6 5 4
3 2 1
(13.0) .512
(4.8) .189 (12.7) .500
(2.0) Typ .079
MB2461E1W01-FA
HARDWARE
Standard Hardware AT513H Inch Threaded Hexagon Nut 2 included with each switch Material: Brass with Nickel Plating
(9.0) .354 (1.5) .059 1/4-40 Thd (8.0) .315
AT509 Lockwasher 1 included with each switch Material: Steel with Zinc/Chromate Optional Hardware
(6.4) Dia (10.2) Dia .252 .402
(0.5) .020
AT507H Locking Ring for A1 or S1 Bushing Material: Steel with Zinc/Chromate
(6.35) Dia .250
(2.0) .079 (5.5) or .229
(12.0) Dia .472
AT515 Locking Ring for E1 Bushing Material: Steel with Zinc/Chromate
(6.2) Dia .244
(5.5) .217 (12.0) Dia .472
(2.0) .079
(1.7) .067
(0.8) .031
(1.68) .066
(0.8) .031
N KK Switches • email: sales@nkkswitches.com • Phone (480) 991-0942 • Fax (480) 998-1435 • www.nkkswitches.com
03-07
