BASIC SWITCHES BASIC
SWITCHES
B3
COMMERCIAL & MILITARY GRADES, SUB-SUBMINIATURE DOUBLE BREAK, SNAP-ACTION
MIL-PRF-8805/76 (0.200 inches wide)
OTTO’s B3-2XXXX series is a sub-subminiature switch that
meets all requirements of MIL-PRF-8805/76. Designed to
switch at least one million mechanical cycles, the B3 surpasses
the requirements of the military in these categories: contact
resistance less than 25mΩ, contact pressure, contact bounce
and overall cycle life. For MIL-PRF-8805/76 requirements,
B3-22141 has standard silver with gold contacts, SPDT double
break two circuit (Form Z), solder terminals in thermoset case
material. Gold plate contacts are available for non-military
applications. UL recognized and CSA certified models available.
MIL-PRF-8805/101 (0.156 inches wide)
For your really difficult projects, try OTTO’S B3 series. They
meet the OTTO inspired MIL-PRF-8805/101 specification. Only
0.156” thick, think of all those extra 0.044” you can use in those
tight ganged jobs. With the B3 series, you can get an extra pole
in where only four MIL-PRF-8805/76s fit, with room to spare.
Examine the characteristics. With the MIL-PRF-8805/101, the
only thing you give up is the extra space the MIL-PRF-8805/76
takes. Cycle life, very low contact resistance, higher than normal
contact pressures, minimal contact bounce...everything is exactly
as provided by the MIL-PRF-8805/76 specification.
For MIL-PRF-8805/101 requirements, B3-11141 (PC pin) and
B3-12141 (turret) have silver with gold contacts and SPDT
double break (Form Z) contact. For commercial applications,
a variety of contact forms, special forces and gold plate
contacts are available. Most versions are also UL recognized
and CSA certified.
Great circuit versatility is available with either switch style. You
have your choice of normally open (Form X) or closed (Form Y),
3 terminal (Form C) and 4 terminal (Form Z) SPDT double break.
Features:
• Lowlevelswitchingcapability
• Lessthan25mΩcontactresistance
• Upto8ampsswitchingcapability
• Buttonacceptsactuationdirectlyfromacam
• Choiceof0.156”&0.200”widemodels
• Choiceof6standardterminalstylesorwireleads
• AvailableinCommercial&Militarygrades
• ULrecognized&CSAcertified
• QualifiedunderMIL-PRF-8805/76&MIL-PRF-8805/101
• RoHS/WEEE/Reachcompliant
®
APPLICATIONS
OTTO sub-subminiature switches are designed to meet all
applications requiring MIL-PRF-8805/76 or MIL-PRF-8805/101
switches. Basic switches are designed for miniature spaces
where cam or other limit actuators are used. In addition, toggle,
pushbutton and lever actuators are available.
Right Angle
PC Terminals
PC Pins
Wire Wrap
Terminals
Solder Turret
Terminals
StandardCharacteristics/Ratings:
ELECTRICALRATINGS:
Circuitry Load SeaLevel 70,000feet SeaLevel@
@28VDC @28VDC 115VAC,60/400Hz
SPST-NO or NC Resistive 8A 8A 8A
Form Z 5A 5A 5A
Form C 5A 5A 5A
Gold Contacts 5A 5A N/A
SPST-NO or NC Inductive* 5A 3A 5A
Form Z 3A 2A 3A
Form C 2.5A 1.5A 2.5A
Gold Contacts 3A 2A 3A
*L/R = 0.026
Lamp 1A N/A 1A
Motor 5A N/A
DWV 1050Vrms 400Vrms
LowLevel: Gold contacts 10mA @ 30mV
ElectricalLife: 50,000 cycles at full load
MechanicalLife: 1,000,000 cycles
Seal: Unsealed
OperatingTempRange: -65°C to +125°C
OperatingForce: 5 oz +3/-2 oz typical, 6 oz max, or 5 oz min options
ReleaseForce: 1.5 oz min
OperatePoint: 0.320 +/- 0.015 inches from mounting holes
Overtravel: 0.004 inches min
MovementDifferential: 0.018 +/- 0.008 inches
MATERIALS:
Case: Thermoset, blue
Cover: Thermoplastic, blue
Button: Thermoplastic, black
Terminals: Brass with gold
Contacts: Stationary: Silver with gold plate
Moveable: Silver with gold plate
TerminalHardware: None provided
MountingHardware: None provided
BASICS
Specifications Subject To Change Without Notice www.ottoexcellence.com 10
.502
.030
BASIC SWITCHES
BASIC
SWITCHES
B3
COMMERCIAL & MILITARY GRADES, SUB-SUBMINIATURE DOUBLE BREAK, SNAP-ACTION
AuxiliaryLeverActuatorsforB3
Catalog Number
Number ofPoles
A1-101-02 1
A3-102 2
Supplied with two 2-56 panhead screws,
hex nuts and lockwashers.
.092
.115
(.200)
.125
"A"
90° 3
BasicSwitch
shownwith
SolderTurret
Terminals
Terminal Dim.“A”
Style Length
2 0.125”
3 0.187”
Printed
CircuitPin
Terminal
Style1
WireWrap
Terminal
Style4
RightAngle
PrintedCircuit
Terminal
Style5
Solder
Terminal
Style6
Available on the
0.200” model only.
CONTACTCONFIGURATIONS:
MlL-PRF-8805/76 and MlL-PRF-8805/101 specify single pole, double throw, double break
(Form Z) contact configuration. Available and included in the military specifications are
SPNO and SPNC double break, (Form X and Y). The MlL-PRF-8805/101 also specifies
SPDT Form C.
MILITARYAPPROVALS
(MlL-PRF-8805/76&MlL-PRF-8805/101)
Certain OTTO B3 models have been qualified to the military specifications for these
parts. The following is a partial listing. Consult the Cross Reference that appears at the
back of this catalog for the latest, complete listings.
MILITARYNO. OTTOP/N MILITARYNO. OTTOP/N
MS27257-1 B3-26141 M8805/101-011 B3-15141
MS27257-2 B3-22141 M8805/101-012 B3-15142
M8805/101-001 B3-10064 M8805/101-013 B3-13141
M8805/101-002 B3-10065 M8805/101-014 B3-13142
M8805/101-003 B3-10066 M8805/101-015 B3-11131
M8805/101-004 B3-10067 M8805/101-016 B3-11132
M8805/101-005 B3-10063 M8805/101-017 B3-12131
M8805/101-006 B3-10072 M8805/101-018 B3-12132
M8805/101-007 B3-11141 M8805/101-019 B3-15131
M8805/101-008 B3-11142 M8805/101-020 B3-15132
M8805/101-009 B3-12141 M8805/101-021 B3-13131
M8805/101-010 B3-12142 M8805/101-022 B3-13132
ORDERINGINFORMATION:
B3Basic
Select the OTTO B3 basic switch to match your specific circuit and
mechanical requirements. To order, specify your requirement using
the OTTO Part Number Code shown below.
Example:B3-12141 is 0.156” wide, has 1/8” long turret terminals, 5 oz
operating force, SPDT double break and silver/gold contacts (MIL-
PRF-8805/101).
Model TerminalStyle
orWireLength
Operating
Force
Circuitry Contact
Material
1.0.156”(MILGrade)
2.0.200”(MILGrade)
3. 0.156” (Com’l Grade)
4. 0.200” (Com’l Grade)
1.PCPins
2.Turret,1/8”lg.
3. Turret, 3/16” lg.
4. Wire Wrap
5. Right Angle
PC Pins
6. Solder ➀
A. With Wires 06.0" lg.
B. With Wires 12.0" lg.
C. With Wires 18.0" lg.
D. With Wires 24.0" lg.
E. With Wires 30.0" lg.
1. 5 +3-2 oz
2. 5 oz min
3. 6 oz max
1. SPNO-DB, Form X
2. SPNC-DB, Form Y
3.SPDT,FormC
4.SPDT-DB,FormZ
1.Silver/Gold–
HighCurrent
2.Silver/Gold–
LowCurrent
➀ Available on 0.200” wide models only.
B3PARTNUMBERCODE
BoldCode items signify conformance to MIL-PRF-8805 specifications.
B3–X X X X X
SWITCH WIDTH DIM. "A"
.156 .092
.200 .070
.125
.053±.003
11 OTTO Full Line Catalog Specifications Subject To Change Without Notice
Mouser Electronics
Authorized Distributor
Click to View Pricing, Inventory, Delivery & Lifecycle Information:
OTTO:
B3-11131 B3-11132 B3-11141 B3-11142 B3-12131 B3-12132 B3-12141 B3-12142 B3-13131 B3-13132 B3-
13141 B3-10064 B3-10065 B3-41141 B3-11111 B3-11112 B3-11231 B3-11232 B3-11311 B3-11331 B3-11341
B3-12111 B3-12112 B3-12121 B3-12122 B3-12221 B3-12222 B3-12231 B3-12232 B3-12241 B3-12242 B3-
12311 B3-12312 B3-12321 B3-12322 B3-12341 B3-12342 B3-13111 B3-13341 B3-13342 B3-14121 B3-14122
B3-14131 B3-14132 B3-14141 B3-14142 B3-14211 B3-14231 B3-14331 B3-14332 B3-14341 B3-14342 B3-
15212 B3-15231 B3-15232 B3-15242 B3-15342 B3-21111 B3-21132 B3-21141 B3-21142 B3-21212 B3-21241
B3-21341 B3-22111 B3-22121 B3-22131 B3-22132 B3-22142 B3-22211 B3-22212 B3-22231 B3-22241 B3-
22242 B3-22311 B3-22331 B3-22332 B3-22341 B3-22342 B3-24121 B3-24132 B3-24141 B3-24212 B3-24232
B3-25141 B3-25241 B3-25311 B3-26111 B3-26131 B3-26132 B3-26142 B3-26242 B3-2A241 B3-31111 B3-
31131 B3-31132 B3-31141 B3-31142 B3-31212 B3-31242