B3
BASIC
SWITCHES
SUBMINIATURE BASIC SWITCHES
DOUBLE BREAK, SNAP-ACTION, COMMERCIAL & MILITARY GRADES, SUBMINIATURE
MIL-PRF-8805/76 (0.200 inches wide)
OTTO’s B3-2XXXX series is a subminiature switch that is qualified
to 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
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 plated contacts are available for non-military
applications. UL recognized and CSA certified models available.
PC Pins
Solder Turret
Terminals
MIL-PRF-8805/101 (0.156 inches wide)
For your really difficult projects, try OTTO’S B3 series. They are
qualified to 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-8805/76’s 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, 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.
Wire Wrap
Terminals
Right Angle
PC Terminals
®
Standard Characteristics/Ratings:
ELECTRICAL RATINGS:
Circuitry
Load
Sea Level
@ 28VDC
8A
5A
5A
5A
5A
3A
2.5A
3A
70,000 feet
@ 28VDC
8A
5A
5A
5A
3A
2A
1.5A
2A
Sea Level @
115VAC, 60/400Hz*
8A
5A
5A
N/A
5A
3A
2.5A
3A
SPST-NO or NC Resistive
Form Z
Form C
Gold Contacts
SPST-NO or NC Inductive**
Form Z
Form C
Gold Contacts
**L/R
= 0.026
Lamp
Motor
DWV
Low Level:
Electrical Life:
Mechanical Life:
Seal:
Operating Force:
Release Force:
Operate Point:
Overtravel:
*Applies
to commercial grade switches
1A
5A
1000Vrms
N/A
N/A
400Vrms
1A
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
Qualified to MIL-PRF-8805/76 & MIL-PRF-8805/101
UL recognized & CSA certified
RoHS/WEEE/Reach compliant
Gold contacts 10mA @ 30mV
50,000 cycles at full load
1,000,000 cycles
Unsealed
5 oz +3/-2 oz typical, 6 oz max, or 5 oz min options
1.5 oz min
0.320 +/- 0.015 inches from mounting holes
0.004 inches min
Operating Temp Range:
-65°C to +125°C
Movement Differential:
0.018 +/- 0.008 inches
MATERIALS:
Case:
Cover:
Button:
Thermoset, blue
Thermoplastic, blue
Thermoplastic, black
Brass with gold
Stationary: Silver with gold plate
Moveable: Silver with gold plate
None provided, optional wires
None provided
APPLICATIONS
OT TO 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.
14
OTTO Full Line Catalog
Terminals:
Contacts:
Terminal Hardware:
Mounting Hardware:
Specifications Subject To Change Without Notice
SUBMINIATURE BASIC SWITCHES
DOUBLE BREAK, SNAP-ACTION, COMMERCIAL & MILITARY GRADES, SUBMINIATURE
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.
Basic Switch
shown with
Solder Turret
Terminals
Terminal
Style
2
3
Dim. “A”
Length
0.125”
0.187”
BASIC
SWITCHES
B3
BASIC SWITCHES
MILITARY AP
PRO
VALS
(MlL-PRF-8805/76 & MlL-PRF-8805/101)
Certain OTTO B3 models have been qualified to the military specification 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.
MS27257-1
MS27257-2
M8805/101-001
M8805/101-002
M8805/101-003
M8805/101-004
M8805/101-005
M8805/101-006
M8805/101-007
M8805/101-008
M8805/101-009
M8805/101-010
OTTO P/N
B3-26141
B3-22141
B3-10064
B3-10065
B3-10066
B3-10067
B3-10063
B3-10072
B3-11141
B3-11142
B3-12141
B3-12142
MILITARY NO.
M8805/101-011
M8805/101-012
M8805/101-013
M8805/101-014
M8805/101-015
M8805/101-016
M8805/101-017
M8805/101-018
M8805/101-019
M8805/101-020
M8805/101-021
M8805/101-022
OTTO P/N
B3-15141
B3-15142
B3-13141
B3-13142
B3-11131
B3-11132
B3-12131
B3-12132
B3-15131
B3-15132
B3-13131
B3-13132
Printed
Circuit Pin
Terminal
Style 1
.053±.003
.125
Wire Wrap
Terminal
Style 4
.502
.030
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).
Right Angle
Printed Circuit
Terminal
Style 5
SWITCH WIDTH
.156
.200
DIM. "A"
.092
.070
90° 3
.125
"A"
Solder
Terminal
Style 6
Available on the
0.200” model only.
(.200)
.092
.115
Bold Code
items signify conformance to MIL-PRF-8805 specifications.
B3 PART NUMBER CODE
X
X
Operating
Force
Auxiliary Lever Actuators for B3
B3
Model
–
X
X
Circuitry
1. SPNO-DB, Form X
2. SPNC-DB, Form Y
3. SPDT, Form C
4. SPDT-DB, Form Z
X
Contact
Material
1. Silver/Gold –
High Current
2. Silver/Gold –
Low Current
Terminal Style
or Wire Length
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
1. 5
+3-2
oz
2. 5 oz min
2. Turret, 1/8” lg.
3. 6 oz max
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.
Catalog
Number
A1-101-02
A3-102
Number
of Poles
1
2
Supplied with two 2-56 panhead screws,
hex nuts and lockwashers.
For additional options, contact factory.
➀
Available on 0.200” wide models only.
Specifications Subject To Change Without Notice
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15
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