AT078B NKK Switches, AT078B Datasheet

AT078B

Manufacturer Part Number

AT078B

Description

SW CAP SCREW-ON .315" RND WHITE

Manufacturer

NKK Switches

Type

Cap, 0.315 in Diameterr

Series

ATr

Datasheets

1.AT429G.pdf (33 pages)

2.AT528A.pdf (10 pages)

Specifications of AT078B

Switch Type

Pushbutton

Shape

Round

Color

White

Illumination

Non-Illuminated

Mounting Type

Screw On

Size

7.50mm Dia x 6.50mm H

Height

11.79 mm

Mounting Style

SMD/SMT

Termination Style

Screw

Thread Size

M3.5 P0.6

Width

8 mm

For Use With/related Products

MB2000, SCB and WB Series

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

For Use With

MB20, SCB, WB Series

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General

Series MB2000

Electrical Capacity (Resistive Load)

Other Ratings

Materials & Finishes

Environmental Data

Installation

Standards & Certifications

C72

Nominal Operating Force:

Flammability Standards:

Operating Temp Range:

Soldering Time & Temp:

Cap Installation Force:

Insulation Resistance:

Stationary Contacts:

Power Level (silver):

Movable Contactor:

Contact Resistance:

Logic/Power Level:

Dielectric Strength:

Movable Contacts:

Logic Level (gold):

Mounting Torque:

(gold over silver)

Mechanical Life:

Contact Timing:

Plunger Travel:

Electrical Life:

Process Seal:

Overtravel:

Total Travel

Terminals:

Vibration:

Pretravel:

Humidity:

Plunger:

Sealing:

Frame:

Shock:

CSA:

UL:

Specifications

6A @ 125V AC & 3A @ 250V AC or 3A @ 30V DC

0.4VA maximum @ 28V AC/DC maximum (Applicable Range 0.1mA ~ 0.1A @ 20mV ~ 28V)

Combines silver & gold ratings

Note: Find additional explanation dual rating & operating range in Supplement section.

10 milliohms maximum for silver; 20 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

50,000 operations minimum for splashproof models; 100,000 for all other models

25,000 operations minimum for silver; 50,000 operations minimum for gold

50,000 operations minimum for silver at 3A @ 125V AC

Momentary Action: 1-pole 9.32N; 2-pole 16.18N; 4-pole 25.54N;

Alternate Action: 1-pole 4.41N; 2-pole 7.06N; 4-pole 11.77N

Slow make, slow break

Screw-on Cap (Mom.)

.028” (0.71mm)

.043” (1.09mm)

.071” (1.80mm)

Brass w/nickel plating; polyacetal w/B1 bushing

Stainless steel

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 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

–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/s

B3 & D3 bushing options equivalent to IP67

1.5Nm (13.0 lb

80.0N (18.0 lbf) maximum downward force on actuator

Wave Soldering (PC version): See Profile A in Supplement section.

Manual Soldering: See Profile A in Supplement section.

These devices are not process sealed. Hand clean locally using alcohol based solution.

UL94V-0 case

File No. E44145

All models recognized at 6A @ 125V AC or 3A @ 250V AC or 0.4VA max. @ 28V DC max.

Add “/U” to end of part number to order UL mark on switch.

Add “/CUL” to end of part number to order cULus mark on switch.

File No. 023535_0_000

All models certified at 6A @ 125V AC or 3A @ 250V AC or 0.4VA max. @ 28V max.

Add “/C” to end of part number to order CSA mark on switch.

) acceleration (tested in 6 right angled directions, with 5 shocks in each direction)

•

in) for double nut; .7Nm (6.0 lb

www.nkk.com

Screw-on Cap (Alt.)

.110” (2.80mm)

.043” (1.10mm)

.153” (3.90mm)

•

in) for single nut

Bushing:

Case:

Snap-on Cap (Mom. & Alt.)

.125” (3.19mm)

.050” (1.26mm)

.175” (4.45mm)

Miniature Pushbuttons

Brass with nickel plating

Diallyl phthalate resin (UL94V-0)

Related parts for AT078B

AT078B Summary of contents

Page 1

Series MB2000 General Specifications Electrical Capacity (Resistive Load) Power Level (silver 125V AC & 250V 30V DC Logic Level (gold): 0.4VA maximum @ 28V AC/DC maximum (Applicable Range 0.1mA ~ 0.1A @ ...

Page 2

Miniature Pushbuttons Distinctive Characteristics Guide interlocked with actuator block prevents window locking and maintains correct plunger alignment to assure contact stability. Employs an over-center actuator mechanism, which diminishes sparking and increases operating life in AC circuits. High torque bushing construction ...

Page 3

... Diameter E .748” (19.0mm) Diameter Cap Colors A Black B White C Red * D Amber * E Yellow F Green * G Blue * H Gray * Not available with cap code E IMPORTANT: Switches are supplied without UL, cULus, & CSA markings unless specified. Specific models & ratings noted on General Specifications page. C C87 ...

Page 4

Series MB2000 Plunger Position ( ) = Momentary Normal Pole Model Keyway C MB2011 ON SP MB2065 ON MB2061 ON DP MB2085 ON MB2181 ON 4P MB2185 ON (6.4) Dia Plunger for S .252 Screw-on Caps Plunger is plastic for ...

Page 5

Large Bushing Miniature Pushbuttons 01 Solder Lug Epoxy Seal (2.0) .079 Thk = (0.8) .031 .250” (6.35mm) 03 Straight PC (6.35) Epoxy Seal (4.8) .250 .189 (1.17) .046 Thk = (0.8) .031 .425” (10.8mm) 05 Wirewrap or Extended PC .750” ...

Page 6

Series MB2000 Solder Lug C (7.9) .311 MB2011SB1W01-DA Solder Lug (12.7) .500 MB2061SB1W01-DA Solder Lug (22.3) .878 MB2181SB1W01-DA C90 Large Bushing Miniature Pushbuttons TYPICAL SWITCH DIMENSIONS Single Pole (1.1) x (2.0) Dia Typ Keyway M12P1 .043 x .079 (13.2) Dia ...

Page 7

Large Bushing Miniature Pushbuttons AT503M AT508 Hex Face Nut Lockwasher Material: Material: Brass with Chrome plating Steel with Zinc/Chromate M12 P1 (14.3) .563 (16.0) (2.4) (1.0) .630 .094 .039 AT503M Hex Face Nut Material: Brass with Chrome plating AT4043 Splashproof ...

Page 8

... The MB2000 pushbutton series offers flexibility to accommodate a variety of applications. Using a basic large bushing model, different accessories can be assembled onto the switch to achieve the mounting variations shown on the following two pages. These switches have: C Other 12mm bushing options can be used; see details in preceding Large Bushing Ordering tables. ...

Page 9

Large Bushing Miniature Pushbuttons 4 AT455 Round Material: Polycarbonate Colors CAPS & CAP COLORS FOR SHROUDS AT454 Round Insert Cap Material: Polycarbonate Colors AT080 Screw Adaptor for Insert Caps Material: Brass ...

Page 10

Series MB2000 CUSTOM ASSEMBLY WITH ROUND SHROUD C MB2011SB1W01-4C-A Single Pole 3 2 (13.0) COM .512 1 (2.0) .079 (7.9) .311 CUSTOM ASSEMBLY WITH RECTANGULAR SHROUD MB2011SB1W01-5C-A Single Pole 3 2 (13.0) COM .512 1 (2.0) .079 (7.9) .311 C94 ...

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