B3SN-3012P - Sealed SMT Tactile Switch, 160gf, IP67 | Omron
MPN: B3SN-3012P ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.78 | $0.78 |
| 10 | $0.71 | $7.10 |
| 100 | $0.62 | $62.00 |
| 500 | $0.54 | $270.00 |
| 1,000 | $0.46 | $460.00 |
| 3,000 | $0.39 | $1,170.00 |
B3SN-3012P Overview
A tactile switch is a momentary electromechanical user-input component that completes a circuit only while the user presses the actuator; within the electromechanical hierarchy it belongs to the user-interface switch family alongside pushbuttons, slide switches, and rotary encoders. Tactile switches are defined by their operating force (gf or N), travel distance (mm), contact bounce (ms), and life rating (cycles), and they are used wherever a human must send a discrete logic signal to a microcontroller. Compared with panel-mount pushbuttons, SMT tactiles such as the B3SN series integrate directly into PCB reflow assembly, eliminating hand-soldering and shortening the bill of materials.
The B3SN-3012P key features include a sealed IP67 construction (excluding the terminal section) that protects the dome from flux ingress and environmental contamination during PCB assembly and field operation, a 50,000-cycle mechanical life rating that suits consumer and industrial human-machine interfaces, and 160 gf operating force that gives users a clearly perceptible click. It is supplied on embossed tape (J-bend gull-wing terminals) compatible with standard pick-and-place equipment.
Architecturally, the switch uses a metal dome over a silver-plated copper-beryllium contact system that snaps when the actuator is depressed, producing the tactile event. The dome geometry, contact plating, and base resin compound combine to give a stable contact resistance of 100 mOhm max while keeping contact bounce inside 5 ms typical, which is short enough for direct GPIO capture without software debounce in many applications.
Typical applications include consumer-electronics menu and reset keys, IoT device user buttons, industrial control-panel keypads, test-and-measurement instrument front panels, and medical-device user interfaces where sealed construction prevents fluid intrusion. The IP67 rating also makes it suitable for outdoor or kitchen-appliance front panels.
When designing with the B3SN-3012P, plan a 5 mm clearance around the actuator for finger access and provide a solder paste stencil aperture matched to the gull-wing pad geometry to avoid solder wicking up the terminal. The sealed construction means flux cannot be washed from the dome side, so no-clean flux or post-assembly sealing of the terminal side is recommended.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer datasheet alone, giving engineers a single reference for part selection, sourcing, and PCB integration.
Drop-in alternatives for B3SN-3012P — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
B3SN-3012P-G
✅ Drop-In📋 Reference alternative (not in catalog)
B3SN-3012
✅ Drop-In📋 Reference alternative (not in catalog)
B3SN-3112P
✅ Drop-In📋 Reference alternative (not in catalog)
EVQ6QH50B
✅ Drop-In📋 Reference alternative (not in catalog)
TL6100AF130QP
✅ Drop-In📋 Reference alternative (not in catalog)
B3SN-3012P Maximum Ratings & Electrical Characteristics
| Switch Type | Tactile (momentary) |
| Circuit | SPST-NO |
| Contact Rating | 0.05 A at 24 VDC |
| Operating Force | 160 gf (1.57 N) |
| Actuator Type | Standard round button, top actuated |
| Mounting Type | Surface Mount (SMT, J-bend gull-wing) |
| Orientation | Vertical |
| Outline Dimensions | 6.50 mm x 6.00 mm |
| Sealing | IP67 (IEC-60529), excluding terminal section |
| Mechanical Life | 50,000 cycles minimum |
| Contact Resistance | 100 mOhm maximum (initial) |
| Insulation Resistance | 100 MOhm minimum at 100 VDC |
| Dielectric Strength | 250 VAC for 1 minute |
| Operating Temperature | -25 C to +70 C |
| Storage Temperature | -40 C to +80 C |
| Soldering Profile | Reflow compatible (260 C max, 10 s) |
| Packaging | Embossed tape on reel, 100 pcs per pack |
| RoHS Status | Compliant |
B3SN-3012P Pin Configuration
| Pin 1 | Terminal A — SPST contact terminal A (J-bend gull-wing) |
| Pin 2 | Terminal B — SPST contact terminal B (J-bend gull-wing) |
| Pin 3 | Anchor / Ground Pad — Mechanical mounting pad (PCB ground optional) |
| Pin 4 | Anchor / Ground Pad — Mechanical mounting pad (PCB ground optional) |
Typical Applications
B3SN-3012P is suitable for 6 applications: Consumer Electronics User Buttons, Industrial Control Panel Keypads, IoT Device User Input, Test and Measurement Instrument Front Panels, Medical Device User Interfaces, Outdoor and Kitchen Appliance Front Panels.
Consumer Electronics User Buttons
The B3SN-3012P serves as the primary menu, select, and reset key on consumer handhelds and wearables, where its 160 gf operating force delivers a deliberately perceptible click that confirms input without false triggering from pocket pressure. The IP67 sealing guards against rain and sweat ingress in fitness wearables and outdoor remote controls, while the 6.50 mm x 6.00 mm SMT outline lets designers place multiple switches in compact array configurations. The 0.05 A / 24 VDC contact rating maps directly to GPIO logic-level signaling on common microcontrollers such as STM32 and ESP32 families, eliminating the need for external driver transistors on each button line. Embossed-tape packaging supports standard pick-and-place reflow assembly, lowering total BOM cost versus hand-soldered tactiles in mass production.
Recommended
Industrial Control Panel Keypads
In industrial HMI panels and machine-operator consoles, the B3SN-3012P provides tactile feedback that remains reliable through shift-long repetitive use, with its 50,000-cycle mechanical life covering typical operator-panel duty. The IP67 front-side seal protects against coolant splash and dust ingress common on factory floors, while the J-bend gull-wing terminals survive industrial vibration profiles better than through-hole alternatives. The 160 gf operating force prevents accidental actuation from incidental contact while still allowing gloved-hand operation, an important consideration for panel designers serving heavy-industry customers. Designers typically place the switch behind an overlay label, with the 6.50 mm x 6.00 mm outline enabling 10 mm pitch arrays.
Recommended
IoT Device User Input
IoT endpoints such as smart-home hubs, sensor nodes, and connected appliances need a single multi-function button for pairing, reset, and mode selection, and the B3SN-3012P fits that role with its SPST-NO momentary action and logic-level contact rating. The sealed construction prevents humidity ingress in outdoor-deployed sensor enclosures, while the SMT footprint supports low-profile enclosures where through-hole switches would add unwanted height. The 0.05 A rating pairs cleanly with the GPIO of popular low-power wireless MCUs, and the 160 gf force gives positive feedback for users pairing devices via single-click, double-click, and long-press gestures typically decoded in firmware.
Recommended
Test and Measurement Instrument Front Panels
Bench instruments and handheld multimeters require tactile switches that survive years of technician use, and the B3SN-3012P delivers 50,000-cycle mechanical life and a click that engineers can feel through light gloves. The IP67 rating protects against accidental coffee spills and dust accumulation on crowded lab benches, while the small 6.50 mm x 6.00 mm outline allows dense menu-key layouts on color-TFT front panels. The 24 VDC / 0.05 A rating lets the switch drive FPGA or microcontroller GPIO directly without buffer circuitry, simplifying schematic capture and BOM. Embossed-tape packaging supports high-mix production runs common in T&M product families.
Recommended
Medical Device User Interfaces
Patient monitors, infusion pumps, and portable diagnostic devices use the B3SN-3012P where its IP67 sealing supports wipe-down disinfection protocols required in clinical settings. The 160 gf operating force prevents accidental activation during equipment handling, critical for safety-class medical devices, while the 24 VDC rating and logic-level switching simplify interface to medical-grade microcontrollers with reinforced isolation barriers. The surface-mount construction enables flat-panel sealed enclosures that meet IP54 equipment-level ingress ratings when properly gasketed. Designers often pair the switch with redundant software confirmation (long-press to arm, then short-press to execute) to meet FDA usability-engineering expectations.
Recommended
Outdoor and Kitchen Appliance Front Panels
Outdoor audio equipment, kitchen appliances, and garden-automation controllers need switches that survive steam, splashes, and direct water spray, and the B3SN-3012P's IP67 rating meets that bar without resorting to expensive boot-protected mechanical pushbuttons. The 6.50 mm x 6.00 mm SMT outline lets designers keep front-panel real estate compact while providing multiple sealed input keys. The -25 C to +70 C operating range covers both freezer-side cold storage and oven-side ambient-heat scenarios in kitchen environments. The 160 gf force provides tactile confirmation through wet or gloved fingers, and embossed-tape packaging keeps assembly cost low for consumer-grade product volumes.
Recommended
Recommended Products Summary
Engineering reference data for B3SN-3012P — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | B3SN-3012P-G | B3SN-3012 | B3SN-3112P | EVQ6QH50B | TL6100AF130QP |
|---|---|---|---|---|---|---|
| Brand | Omron | Omron | Omron | Omron | Panasonic | E-Switch |
| Package | SMT 6.5x6.0 mm (J-bend) | SMT 6.5x6.0 mm (J-bend) - same | SMT 6.5x6.0 mm (J-bend) - same | SMT 6.5x6.0 mm (J-bend) - same | SMT 6.5x6.0 mm - same | SMT 6.5x6.0 mm - same |
| Circuit | SPST-NO | SPST-NO + GND | SPST-NO | SPST-NO | SPST-NO | SPST-NO |
| Operating Force | 160 gf (1.57 N) | 160 gf | 160 gf | 100 gf | 130 gf | 130 gf |
| Contact Rating | 0.05 A / 24 VDC | 0.05 A / 24 VDC | 0.05 A / 24 VDC | 0.05 A / 24 VDC | 0.02 A / 15 VDC | 0.05 A / 12 VDC |
| IP Rating | IP67 (IEC-60529) | IP67 | IP67 | IP67 | None (non-sealed) | IP67 |
| Mechanical Life | 50,000 cycles | 50,000 cycles | 50,000 cycles | 50,000 cycles | 100,000 cycles | 100,000 cycles |
| Mounting Type | Surface Mount J-bend | Surface Mount J-bend | Surface Mount J-bend | Surface Mount J-bend | Surface Mount J-bend | Surface Mount J-bend |
| RoHS | Compliant | Compliant | Compliant | Compliant | Compliant | Compliant |
Key Differentiators
- Highest operating force in its outline class for deliberate-click applications (vs EVQ6QH50B)
- Industry-leading IP67 sealing at 6.5x6.0 mm outline (vs TL6100AF130QP)
- 24 VDC contact rating at 0.05 A vs lower-voltage competitors (vs EVQ6QH50B)
Design Notes
Estimated: The B3SN-3012P datasheet specifies a recommended PCB land pattern of approximately 2.0 mm x 1.5 mm pads on 4.50 mm x 2.50 mm centers for the two SPST terminals, plus two anchor pads. Use a stainless-steel laser-cut stencil with 0.10-0.12 mm thickness; apertures should be 1:1 to the land pattern to avoid solder wicking up the J-bend terminal. Place a 1.0 mm keep-out under the actuator dome to prevent solder paste contamination of the moving contact.
Provide a 5 mm clearance around the actuator for finger access in handheld consumer designs, and 8 mm minimum in gloved-industrial applications. The sealed construction means flux cannot enter from the dome side, but flux can wick up the J-bend terminals from below, so place a solder mask dam between the contact terminals and any nearby via-in-pad structures. Always route the SPST contact trace on the inner PCB layer to avoid hand-solder rework contaminating the dome side of the switch.
Do not exceed 0.05 A / 24 VDC on the B3SN-3012P - the silver-plated copper contacts are rated for low-current logic only and will weld if used to switch inductive loads directly. Drive relays, solenoids, or LED arrays above 50 mA through an external MOSFET or transistor. Do not wash the PCB from the dome side after assembly; the IP67 seal is one-directional and only protects the contact from above. Finally, do not press the actuator with a tool harder than 1 kgf during testing, as the dome is calibrated for finger actuation and excessive preload will deform the snap-action mechanism.
For matrix keypad scanning, add a 0.1 uF ceramic bypass capacitor near each B3SN-3012P return line to suppress contact bounce during scanning transitions. Although the switch datasheet specifies 5 ms typical bounce, scanning at 1 kHz with the bypass cap reduces missed-read errors to <0.01% in typical implementations. If the switch routes through a long flex cable (>50 mm), add a 10 kohm pull-up or pull-down at the MCU end to prevent floating-state false triggers during cable flexure.
Compliance Information
RoHS and REACH compliant per Omron product listing; lead-free reflow-compatible; AEC-Q100 not applicable for electromechanical switch components; conflict-mineral compliance confirmed via Omron supplier declarations