Ultra-small Tactile Switch (SMT) B3U Ultra-small-sized Tactile Switch with High Contact Reliability: 1.2 x 3 x 2.5 mm (H x W x D) * Compact switch allows high-density mounting on PCBs for mobile equipment. * Dust-proof construction provides high reliability in dusty environments. * Surface mounted: Ideal for high-density mounting. * Models with ground terminals are available for protection against static electricity. RoHS Compliant List of Models Embossed taping (standard quantity) Operation type Locating pin Plunger color Top-actuated Without boss Black Sideactuated Note: Without ground terminal With ground terminal B3U-1000P B3U-1100P With boss B3U-1000P-B B3U-1100P-B Without boss B3U-3000P B3U-3100P With boss B3U-3000P-B B3U-3100P-B 3,500 Without ground terminal B3U-1000PM With ground terminal B3U-1100PM Quantity 1,000 B3U-1000PM-B B3U-1100PM-B 4,000 B3U-3000PM B3U-3100PM 1,000 B3U-3000PM-B B3U-3100PM-B Orders must be made in multiples of the order unit specified above. Ratings/Characteristics Item Embossed taping (small quantity) Quantity per reel Operation type Top-actuated (B3U-1000 Series) Side-actuated (B3U-3000 Series) Operating Characteristics Operation type Item Top-actuated (B3U-1000 Series) Ratings 1 to 50 mA, 5 to 12 VDC (resistive load) Operating force (OF) Ambient operating temperature -25C to +70C at 60%RH max. (with no icing or condensation) 1.50 0.49 N {153 50 gf} Releasing force (RF) 0.2 N min. {20 gf} Ambient operating humidity 35% to 85% (at +5 to +35C) Pretravel (PT) 0.15 +0.2 -0.1 mm Contact form SPST-NO Contact resistance 100 m max. (initial value) (rated: 1 mA, 5 VDC) Insulation resistance 100 M min. (at 100 VDC) Side-actuated (B3U-3000 Series) 1.59 0.49 N {162 50 gf} 0.2 +0.2 -0.1 mm Dielectric strength 250 VAC, 50/60 Hz for 1 min Bounce time 5 ms max. Vibration resistance 10 to 55 Hz, 1.5 mm double amplitude Shock resistance 1,000 m/s2 max. Durability 200,000 operations min. Maximum operating force 30 N max. Weight Approx. 0.022 g 100,000 operations min. 1 B3U B3U Dimensions (Unit: mm) Top-actuated Models Without Ground Terminal, without Boss With Ground Terminal, without Boss Terminal Arrangement /Internal Connections (Top View) B3U-1000P(M) 2 Terminal Arrangement /Internal Connections (Top View) B3U-1100P(M) 2 1 1 3 1.6 PCB Mounting (Top View) +0.15 -0.10 4 3 2.5 1.4 1.6 4 3 4.20.1 2.60.1 1.2 +0.15 -0.10 2.5 1.70.1 PCB Mounting (Top View) +0.15 -0.10 4.20.1 2.60.1 1.2 +0.15 -0.10 1.4 1.70.1 1.10.1 1.9 1.10.1 1.5 dia. 1.5 dia. 0.5 0.80.1 Without Ground Terminal, with Boss With Ground Terminal, with Boss Terminal Arrangement /Internal Connections (Top View) B3U-1000P(M)-B 2 Terminal Arrangement /Internal Connections (Top View) B3U-1100P(M)-B 2 1 1 3 1.6 4 3 2.5 PCB Mounting (Top View) +0.15 -0.10 1.6 1.2 +0.15 -0.10 1.4 4 3 4.20.1 2.60.1 1.70.1 2.5 4.20.1 2.60.1 1.2 +0.15 -0.10 1.4 1.70.1 1.10.1 1.9 Hole: 0.75 +0.1 0 dia. 1.5 dia. PCB Mounting (Top View) +0.15 -0.10 Hole: 1.5 dia. 0.75 +0.1 0 dia. 1.10.1 0.5 0.80.1 0.5 0.650.05 dia. Note: 2 0.5 0.650.05 dia. Unless otherwise specified, a tolerance of 0.2 mm applies to all dimensions. No terminal numbers are indicated on the Switches. B3U B3U Side-actuated Models Without Ground Terminal, without Boss With Ground Terminal, without Boss Terminal Arrangement /Internal Connections (Top View) B3U-3000P(M) 2 B3U-3100P(M) Terminal Arrangement /Internal Connections (Top View) 2 1 1 3 4 3 PCB Mounting (Top View) 1.2+0.15 -0.10 1.7 10.1 0.9 4 3 1.2+0.15 -0.10 1.7 0.9 4.20.1 2.60.1 10.1 2.5 4.20.1 2.60.1 1.95 1.95 3.2 PCB Mounting (Top View) 3.2 1.70.1 1.4 2.5 1.70.1 1.4 1.10.1 1.9 1.10.1 0.5 0.80.1 Without Ground Terminal, with Boss B3U-3000P(M)-B With Ground Terminal, with Boss Terminal Arrangement /Internal Connections (Top View) 2 Terminal Arrangement /Internal Connections (Top View) B3U-3100P(M)-B 2 1 1 3 4 3 PCB Mounting (Top View) 1.2+0.15 -0.10 1.7 10.1 0.9 4.20.1 2.60.1 1.95 3.2 2.5 4.20.1 2.60.1 1.95 3.2 1.70.1 1.4 PCB Mounting (Top View) 1.2+0.15 -0.10 1.7 10.1 0.9 4 3 2.5 1.70.1 1.4 1.10.1 1.9 Hole: 0.75 +0.1 0 dia. Hole: 0.75 +0.1 0 dia. 1.10.1 0.5 0.80.1 0.5 0.650.05 dia. Note: 0.5 0.650.05 dia. Unless otherwise specified, a tolerance of 0.2 mm applies to all dimensions. No terminal numbers are indicated on the Switches. Precautions Be sure to read the precautions common to all Tactile Switches on pages for correct use. 3 B3U B3U * Application examples provided in this document are for reference only. In actual applications, confirm equipment functions and safety before using the product. * Consult your OMRON representative before using the product under conditions which are not described in the manual or applying the product to nuclear control systems, railroad systems, aviation systems, vehicles, combustion systems, medical equipment, amusement machines, safety equipment, and other systems or equipment that may have a serious influence on lives and property if used improperly. Make sure that the ratings and performance characteristics of the product provide a margin of safety for the system or equipment, and be sure to provide the system or equipment with double safety mechanisms. Note: Do not use this document to operate the Unit. OMRON Corporation ELECTRONIC AND MECHANICAL COMPONENTS COMPANY Contact: www.omron.com/ecb Cat. No. A162-E1-05 0812(0207)(O)