basic switches
commercial & military Grades, sub-subminiature double break, snap-action
basic
switches
b3
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.
basics
PC Pins
Solder Turret
Terminals
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.
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:
1A
5A
1050Vrms
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
UL recognized & CSA certified
Qualified under MIL-PRF-8805/76 & MIL-PRF-8805/101
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:
Terminals:
Contacts:
Terminal Hardware:
Mounting Hardware:
Thermoset, blue
Thermoplastic, blue
Thermoplastic, black
Brass with gold
Stationary: Silver with gold plate
Moveable: Silver with gold plate
None provided
None provided
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.
specifications subject to change without notice
www.ottoexcellence.com
10
b3
basic
switches
basic switches
commercial & military Grades, sub-subminiature double break, snap-action
Basic Switch
shown with
Solder Turret
Terminals
Terminal
Style
2
3
Dim. “A”
Length
0.125”
0.187”
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 AP
PRO
VALS
(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.
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
B3 – X
Model
1. 0.156” (MIL Grade)
2. 0.200” (MIL Grade)
3. 0.156” (Com’l Grade)
4. 0.200” (Com’l Grade)
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. ilver/Gold –
S
High Current
2. ilver/Gold –
S
Low Current
Auxiliary Lever Actuators for B3
Terminal Style
or Wire Length
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
➀
Available on 0.200” wide models only.
Supplied with two 2-56 panhead screws,
hex nuts and lockwashers.
specifications subject to change without notice
11
otto Full line catalog
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