Overview
OTTO’s line of B3 Series Subminiature Basic Switches comprises highly durable snap-action switches that meet commercial and military specifications, including MIL-PRF-8805/76 and MIL-PRF-8805/101 standards. These subminiature basic switches are prized for their double break, snap-action mechanism and compatibility within both commercial and military-grade applications.
Key Features and Specifications
The B3 switches are engineered to endure at least one million mechanical cycles, demonstrating superior performance in contact resistance (<25mΩ), contact bounce, and overall cycle life. Commercial and military users benefit from various options such as silver with gold contacts and SPDT double break. Specific models (B3-22141 and B3-12141) have been certified to fulfill particular military requirements with their standard configurations. Additionally, for commercial applications, gold-plated contacts are available. The versatility of circuit configurations includes SPST-NO or NC Resistive and Inductive loads, with ratings of 28VDC at sea level and 15VAC at 60/400Hz*. Mechanical life is rated at 1,000,000 cycles, and the electrical life extends to 50,000 cycles at full load.
Design and Materials
Selections of these subminiature switches include options for normally open or closed, three or four terminal, SPDT double break forms. These features ensure reliable switching capabilities, ranging from low level to up to 8 amps. The operating force is typical at 5 oz +3/-2 oz, with alternative options available. A diverse range of contact forms, special forces, and gold plate contacts are supported across the different variants. The B3 series is constructed from durable materials such as a thermoset case, thermoplastic cover and button, and brass terminals with gold contacts.
Applications
Applicable in tight or miniature spaces, these subminiature basic switches serve a multitude of purposes, particularly where cam or other limit actuators are applied. They are also suitable for integration with toggle, pushbutton, and lever actuators, depending on the application needs. The B3 switches are especially adaptable due to their thin nature (0.156″ or 0.200″ wide), array of terminal styles (PC pins, solder turret, etc.), and various mounting and operating configurations.
Approval and Certification
Compliance with military and other industry standards is a notable feature of the B3 Series. Specific models have received military approval under MIL-PRF-8805/76 & MIL-PRF-8805/101 specifications. The datasheet also notes UL recognition and CSA certification for several variants, assuring broader applicability and trust in quality standards.
Ordering Information
For convenience, the datasheet outlines a structured ordering system based on the OTTO Part Number Code. By specifying various aspects such as width (0.156″ or 0.200″), terminal style, operating force, circuitry, and contact material, customers can select the ideal B3 switch for their requirements. Additionally, the availability of auxiliary lever actuators extends the functional scope of the switches.
Refer to www.ottoexcellence.com for full specifications and to verify the latest product information, as the datasheet advises that specifications are subject to change without notice.
References:
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