BETASelected package6 × 6 mmB3F-1000
Momentary SPST-NO tactile switch
Push Button (Tactile Switch) Reference Tables
Search the Push Button (Tactile Switch) pin reference and manufacturer-referenced specification tables.
Package view
Physical connections2 pinsPackage-specific numbering
Reference collection6 tables36 parameters & pin functions
Pin reference
Signal names, electrical functions and connection guidance
Physical pin numbers2 pins
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| Pin | Signal | Type | Function & connection |
|---|---|---|---|
| 1 | Contact terminal 1 | Pads 1: two leads on opposite sides of the body (6.5 mm apart on the 6 mm switch, 12.5 mm on the 12 mm one), joined inside.Connection guidanceConnect to the microcontroller input; with INPUT_PULLUP the input idles HIGH. A switch has no polarity: terminals 1 and 2 may be swapped. | |
| 2 | Contact terminal 2 | Pads 2: the other two leads, also joined inside. Pressing the plunger connects terminal 1 to terminal 2.Connection guidanceConnect to ground for an active-low button (pressed reads LOW). Closed: at most 100 mΩ between the terminals (initial). Leads 1 and 2 on the same side are the switched pair. |
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Selected parts and terminals
Manufacturer scope and page conventions
Manufacturer-referenced values6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Reference parts | Omron B3F-1000 (6 × 6 mm) · B3F-4000 (12 × 12 mm) | Omron B3F Tactile Switch, Cat. No. A070-E1-08 |
| Contact form | SPST-NO, momentary | Closed only while the plunger is held |
| Leads | 4 leads, 2 contacts | The two leads across the body are joined inside |
| Terminal 1 | Pads 1 (two leads) | ProTech pin 1 · KiCad pad 1 |
| Terminal 2 | Pads 2 (two leads) | ProTech pin 2 · KiCad pad 2 |
| Proteus symbol | BUTTON | 2 pins; ProTech’s Push Button models it |
No specifications match. Try a parameter name or a unit.
If unsure which leads are joined, measure: the pair that reads 0 Ω unpressed is one terminal.
The two push buttons
From each manufacturer’s sheet · the numbers ProTech’s model and checks use
Manufacturer-referenced values13 parameters
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| Specification | Omron B3F-1000 | Omron B3F-4000 |
|---|---|---|
| Contact rating (resistive) | 1–50 mA at 3–24 V DC (resistive) | 1–50 mA at 3–24 V DC (resistive) |
| Minimum load | 10 µA at 1 V DC | 10 µA at 1 V DC |
| Contact resistance | 100 mΩ maximum (initial) | 100 mΩ maximum (initial) |
| Insulation resistance | ≥ 100 MΩ at 250 V DC | ≥ 100 MΩ at 250 V DC |
| Dielectric strength | 500 V AC for 1 min | 500 V AC for 1 min |
| Operation | 0.98 ± 0.29 N (100 gf); release ≥ 0.2 N | 1.27 ± 0.49 N (130 gf); release ≥ 0.29 N |
| Travel | pretravel 0.25 mm | pretravel 0.3 mm |
| Life | 1 000 000 operations | 3 000 000 operations |
| Contact bounce | ≤ 5 ms | ≤ 5 ms |
| Operating temperature | −25 to +70 °C | −25 to +70 °C |
| Size | 6 × 6 mm, plunger Ø3.5 mm, 4.3 mm high | 12 × 12 mm, plunger Ø7.1 mm, 4.3 mm high |
| Terminals | 6.5 × 4.5 mm (4 leads) | 12.5 × 5.0 mm (4 leads) |
| Look | black body, metal cover with four tabs, ivory round plunger | black body, metal cover, large ivory round plunger |
No specifications match. Try a parameter name or a unit.
Contact resistance is the initial maximum; it rises with wear and contamination. Ratings are for resistive loads.
How ProTech models it
The same numbers drive the simulator, its checks and this page
Manufacturer-referenced values6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Closed | 100 mΩ between pins 1 and 2 | I = V / Rc, P = I² · Rc |
| Open | No branch | Insulation resistance not modelled |
| Rating check | Warns above 50 mA or 24 V | Pop-up Check page and the status bar |
| Bounce | 5 ms in the Lab only | Not in the running circuit |
| Modes | NO (closed while pressed) · NC (open while pressed) | Properties; latching keeps its saved position |
| Size | Drawn at true size | 6 × 6 mm or 12 × 12 mm against the Uno |
No specifications match. Try a parameter name or a unit.
Change the switch in Properties: the drawing, rating, contact resistance and PCB footprint follow it.
Reading it with a microcontroller
5 V input with a pull-up resistor
Manufacturer-referenced values6 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| Pull-up | 10 kΩ to 5 V (or INPUT_PULLUP) | Input idles HIGH |
| Pressed current | 0.5 mA | 5 V / 10 kΩ, far below 50 mA |
| Pressed voltage at the pin | ≈ 50 µV | 0.5 mA × 100 mΩ contact resistance |
| Contact heating | 0.025 µW | (0.5 mA)² × 100 mΩ |
| RC debounce | 10 kΩ + 100 nF → τ = 1 ms | Settles within about 5 τ = 5 ms, the bounce time |
| Software debounce | Read again 10–20 ms after an edge | Longer than the 5 ms bounce |
No specifications match. Try a parameter name or a unit.
Never switch a motor or lamp through a tactile switch: let it drive a transistor or relay.
Package
B3F-1000 · 6 × 6 mm
Manufacturer-referenced values5 parameters
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| Parameter | Value | Conditions / notes |
|---|---|---|
| 6 mm body | 6 × 6 mm, plunger Ø3.5 mm, 4.3 mm high | B3F-1000 |
| 12 mm body | 12 × 12 mm, plunger Ø7.1 mm, 4.3 mm high | B3F-4000 |
| 6 mm pads | 6.50 × 4.50 mm pad spacing, Ø1.1 mm drill | KiCad SW_PUSH_6mm |
| 12 mm pads | 12.50 × 5.00 mm pad spacing, Ø1.2 mm drill | KiCad SW_PUSH_12mm |
| Mount | Through-hole | Leads soldered; the plunger faces up |
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Footprints are KiCad’s, the same as ProTech’s PCB page; check the drill against your board house.
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