Complete Guide to Tactile Switch Specifications: From 3mm to 12mm, Understand All Sizes in One Article

I. 3mm Series (Miniature Ultra-thin) 3×3mm (Square) Surface Mount 4-pin; Height optional: 0.8, 1.5, 2.0, 2.5mm. Features: Ultra-small and ultra-thin, extremely small footprint; commonly used in Bluetooth headsets, smart wearables, and remote controls. Optional: With grounding pin, IP67 waterproof. 3×4mm (Rectangular) Surface Mount

II. 4mm Series: 4×4mm (Most Popular Small Square Button) Surface Mount 4-Pin SMT; Height H: 1.5, 1.7, 2.0, 2.3, 2.5, 3.0, 3.5, 4.3, 6mm. The most widely used SMT type, used in remote controls, motherboard reset buttons, and small appliance control panels. Optional: waterproof, gold-plated contacts, and models with grounding pins. 4.5×4.5mm Surface Mount 4-Pin; Height: 2.8-5mm; Many domestic TS-45 series models, high cost-performance ratio.

III. 5mm Series: 5×5mm Surface Mount 4-Pin; Height: 0.8, 1.5, 2.0, 2.5, 3.0, 4.3, 5, 6mm. Between 4×4 and 6×6; Commonly used in industrial control boards, instrument buttons, and beauty instruments. Fewer through-hole models, mainly SMT.

IV. 6mm Series (Industry Bestseller, 6×6) 6×6mm It is the most widely used tactile switch in China, with the most complete range of surface mount and through-hole models. Surface mount SMT-6×6: Heights: 2.5, 3.1, 3.7, 4.3, 5.0, 6.0, 7mm; Gull-wing four-pin design; reel-and-cartridge SMT production; suitable for induction cookers, TV remotes, and control panels. Through-hole DIP-6×6 (4-pin): Height H (button rod height): 4.3, 5, 6, 7, 8, 9, 10, 12, 15, 18, 20mm; Pin pitch: 4.5mm; preferred for universal boards and perforated boards; button caps can be added.

V. 7mm Series

7×7mm

Mostly through-hole four-pin, some surface mount; Height: 5-10mm

Longer travel, firmer feel; suitable for industrial equipment, security, and high-power equipment panels.

7.2×7.2mm (TS-6004)

E-cigarette specific model; Base height 4.7mm, total height 6.4mm

VI. 8mm Series

8×8mm

Through-hole four-pin; Height range: 5-12mm

Larger button area, comfortable pressing feel; suitable for instruments, industrial control cabinets, and medical equipment.

VII. 10mm Series

10×10mm

Through-hole four-pin vertical; Height: 6-12mm

Large panel button, suitable for blind pressing; suitable for stage equipment and large home appliance control panels.

VIII. 12mm Series (Largest standard square tactile button)

12×12mm

Surface mount/through-hole DIP Two package types; Height: 4.3, 5, 6, 7.3, 8, 9, 10, 12mm

Four-pin plug-in is the most common; many button cap options; industrial control boards, audio amplifiers, power switch buttons

IX. Tactile Switches: 4 Key Selection Parameters (Must Read)

Body Dimensions (Length × Width): Determines PCB pad size, priority is given to this;

Total Height H: Height from the top of the circuit board to the top of the button, determines the depth of the housing opening;

Operating Force (gf): 100gf (soft), 160gf, 250gf (standard), 300gf (hard);

Mounting Methods

SMT Surface Mount: Reflow soldering, automated production

DIP Through-Hole: Wave soldering/manual soldering, suitable for prototyping, perforated boards

Side-press horizontal: Button direction parallel to the PCB board surface

XI. Key Points for Avoiding Pitfalls When Purchasing

6×6 straight-plug key stick height ≠ total height; confirm H height before ordering;

Side-button switches cannot be installed vertically; the solder pads for the two types are completely different;

For waterproofing, choose an IP67 waterproof model; ordinary tactile switches are not waterproof;

If keycaps are required: the standard inner hole diameter for 6×6 power keycaps is 3.2-3.4mm.