Product Details Portlet

B3SN Sealed Tactile Switch (SMT)

Sealed Surface-mounting Switches Sealed Structure for High Reliability. Available on Embossed Tape

  • Sealed construction conforming to IP67 (IEC-60529) provides high reliability in locations exposed to dust or water. (* Excluding the terminal section.)
  • Available with ground terminals for protection against static electricity.
  • Use of a stainless-steel spring provides a crisp clicking action.
  • Gold plated version enables stable contact and insulation over long periods of time.
  • Available in embossed taping packages for automatic mounting.
  • A small package containing 100 embossed taping reels is available,in addition to the standard pack- age.
RoHS Compliant
Note: This web page provides an excerpt from a datasheet. Refer to Product Datasheet and other applicable documents for more information.
List of Models
6 × 6 mm Models
Operation type Contact material Height Operating force (OF) Plunger color Without ground terminal With ground terminal 
Bags Embossed taping Bags Embossed taping 
Model Minimum packing unit Model Minimum packing unit Model Minimum packing unit Model Minimum packing unit 
B3SN-3000  Series Silver plated 3.1 mm1.57 N {160 gf} Ivory B3SN­3012 100 pcs B3SN­3012P 3,000 pcs  B3SN­3112 100 pcs B3SN­3112P 3,000 pcs 
B3SN-3012P-R100100 pcsB3SN-3112P-R100100 pcs
B3SN-G Series Gold-plated Gold plated 1.76 N {180 gf} Black --­--­B3SN­3012P-G 3,000 pcs --­--­--­--­
Note: Switches in bags must be ordered in units of 100 pieces, and Switches on embossed taping must be ordered in units of 3,000 pieces. Individual Switches are not sold individually.
Ratings (resistive load)1 to 50 mA, 3 to 24 VDC
Minimum applicable load
(reference value)
10 μA at 1 VDC (resistive load)
Ambient operating temperature-25°C to +70°C at 60%RH max. (with no icing or condensation)
Ambient operating humidity35% to 85% (at +5 to +35°C)
Contact formSPST-NO
Contact resistance (initial value)100 mΩ max.
Insulation resistance100 MΩ min. (at 250 VDC with insulation tester)
Dielectric strength250 VAC, 50/60 Hz for 1 min
Bounce time5 ms max.
Vibration resistanceMalfunction: 10 to 55 Hz, 1.5-mm double amplitude
Shock resistanceDestruction: 1,000 m/s2 {approx. 100G} max.
Durabulity100,000 operations min.
WeightApprox. 0.2 g
Degree of protectionIEC IP67

Operating Characteristics
B3SN-3000 SeriesB3SN-G Series
Operating force (OF)1.57±0.49 N {160±50 gf} max.1.76±0.59 N {180±60 gf} max.
Releasing force (RF)0.29 N {30 gf} min.
Pretravel (PT)0.25±0.15 mm
(Unit: mm)
Note:Bottom ViewThe numbers used for terminals in the following graphics are indicated in the "Bottom View" diagram below. In this diagram, the Switch is rotated so that the terminals are on the right and left-hand sides, and the OMRON logo appears the right way up.

Without Ground Terminal


With Ground Terminal


Note:Unless otherwise specified, a tolerance of ±0.3 mm applies to all dimensions. No terminal numbers are indicated on the Switches.


Be sure to read the safety precautions common to all Tactile Switches on pages for correct use.