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Basic Switches


B3 - Double Break, Subminiature Basic Switches

B3 subminiature basic switches, available in commercial and military grades, offer low-level switching and less than 25 milliohm with 1 million cycles.
  • 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 under MIL-PRF-8805/76 & MIL-PRF-8805/101
  • Momentary action
  • UL recognized
  • RoHS compliant

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 models available.

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-8805/76s 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, 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) andB3-12141 (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.

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.

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