MS27257-1 - OTTO Engineering, Inc.

BASIC SWITCHES

BASIC

SWITCHES

8 OTTO Full Line Catalog Specifications Subject To Change Without Notice

COMMERCIAL & MILITARY GRADES, SUBMINIATURE DOUBLE BREAK, SNAP-ACTION

MIL-PRF-8805/76 (0.200 inches wide)

OTTO’s B3-22000 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 25mΩcontact resistance

• Up to 8 amps switching capability

• Button accepts actuation directly from a cam

• Choice of 0.156" & 0.200" wide models

• Choice of six standard terminal styles

• Available in Commercial & Military grades

• UL recognized & CSA certified

• Qualified under MIL-PRF-8805/76 & MIL-PRF-8805/101

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 can be provided.

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 3A

Gold Contacts 3A 2A N/A

Double Break Lamp 1A N/A 1A

2 Circuit N/A N/A 1A

*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 million cycles

Seal: Unsealed

Operating Temp Range: -65°C to +125°C

Operating Force: 5 oz +3/-2 oz typical to 6 oz max

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, gold over nickel

Contacts: Stationary: Silver with gold plate

Moveable: Silver with gold plate

Terminal Hardware: None provided

Mounting Hardware: None provided

BASIC SWITCHES BASIC

SWITCHES

Specifications Subject To Change Without Notice www.ottoexcellence.com 9

BASICS

COMMERCIAL & MILITARY GRADES, 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.

Basic Switch

shown with

Solder Turret

Terminals

Terminal Dim. "A"

Style Length

2 0.125”

30.187”

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 gold contacts (MIL-PRF-

8805/101).

Model Terminal

Style

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

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

➀Available on 0.200” wide models only.

B3 PART NUMBER CODE

Bold Code items signify conformance to MIL-S-8805 specifications.

B3 –X X X X X