OTTO Controls basic switch B3 series 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.

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 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.


  • 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 compliant

Documents & downloads

Data sheet B3Military_Switch_GuideMilitary-Cross-ReferenceStandard Switch GuideBasic Switches Overview
Daniel Jennen
Daniel Jennen
Sales Director, Vice President +49 2152 8955-210