Product Details Portlet

B3U Ultra-small Tactile Switch (SMT)

Ultra-small Surface-mounting Tactile Switches with High Contact Reliability: 1.2 × 3 × 2.5 mm (H × W × D)

  • Smallest class in the industry for high-density mounting of compact devices.
  • Surface mounted: Ideal for high-density mounting.
  • Models with ground terminals are available for protection against static electricity.
  • Available on embossed tape: Ideal for automatic mounting.
RoHS適合
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List of Models
Operation
type
Contact
material
Height Operating
force (OF)
Plunger
color
Locating
pin
Embossed taping
(standard quantity)
Embossed taping
(small quantity)
Without
ground
terminal
With ground
terminal
Minimum
packing
unit
Without
ground
terminal
With ground
terminal
Minimum
packing
unit

B3U-1000
Series:

Top-actuated

Silver
plated
1.6 mm 1.5 N
{153 gf}
Black Without
boss
B3U-1000P B3U-1100P 3,500 B3U-1000PM B3U-1100PM 1,000
With boss B3U-1000P-B B3U-1100P-B B3U-1000PM-B B3U-1100PM-B

B3U-3000
Series:

Side-actuated

3.2 mm 1.59 N
{162 gf}
Without
boss
B3U-3000P B3U-3100P 4,000 B3U-3000PM B3U-3100PM 1,000
With boss B3U-3000P-B B3U-3100P-B B3U-3000PM-B B3U-3100PM-B
Note: Orders must be made in multiples of the order unit specified above.
Ratings/Characteristics
Item Operation
type
Top-actuated
(B3U-1000 Series)
Side-actuated
(B3U-3000 Series)
Rating (resistive load) 1 to 50 mA, 3 to 12 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 humidity 35% to 85% (at +5 to +35ºC)
Contact configuration SPST-NO
Contact resistance (initial value) 100 mΩ max.
Insulation resistance 100 MΩ min. (at 100 VDC with insulation tester)
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. 100,000 operations min.
Weight Approx. 0.022 g
Degree of protection IEC IP40
Washing Not possible

Operating Characteristics
Operation type
Item
Top-actuated
(B3U-1000 Series)
Side-actuated
(B3U-3000 Series)
Operating force (OF) 1.50 ± 0.49 N
{153 ± 50 gf}
1.59 ± 0.49 N
{162 ± 50 gf}
Releasing force (RF) 0.2 N min. {20 gf}
Pretravel (PT)
  0.15 +0.2 mm
-0.1
  0.2 +0.2 mm
-0.1
Dimensions
(Unit: mm)
Top-actuated Models
Without Ground Terminal, without Boss
B3U-1000P(M)
B3U:Dimensions1
 
With Ground Terminal, without Boss
B3U-1100P(M)
B3U:Dimensions2
 
Without Ground Terminal, with Boss
B3U-1000P(M)-B
B3FS:Dimensions3
 
With Ground Terminal, with Boss
B3U-1100P(M)-B
B3U:Dimensions2
Note: Unless otherwise specified, a tolerance of ± 0.2 mm applies to all dimensions. No terminal numbers are indicated on the Switches.
Side-actuated Models
Without Ground Terminal, without Boss
B3U-3000P(M)
B3FS:Dimensions3
 
With Ground Terminal, without Boss
B3U-3100P(M)
B3FS:Dimensions3
 
Without Ground Terminal, with Boss
B3U-3000P(M)-B
B3FS:Dimensions3
 
With Ground Terminal, with Boss
B3U-3100P(M)-B
B3FS:Dimensions3
Note: 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.