TACT Switch™

What is "snap-in" in the product catalog?

"Snap-in" is a structural design for holding a switch in place with terminals, or a frame, that are kinked so the switch does not fall out after insertion into the PC board holes.

What are the different soldering methods?

・Hand (manual) soldering
Soldering is performed manually using a soldering iron.

・Dip soldering
Soldering is performed by passing the workpiece through flowing molten solder.

・Reflow soldering
This is a soldering method for surface mounting of components that uses solder paste or cream instead of molten solder and involves heating the entire PC board and its components.

What are the different taping specifications for switches/TACT Switch™ products?

There are two taping formats – embossed and radial.

・Embossed taping
A packaging method for the purpose of automatic attachment of surface mount components. It uses plastic tape embossed to form pockets for holding the components.

・Radial taping
A packaging method for automatic mounting of components to PC boards. Components are affixed to paper tape in a specified position.

What does a TACT Switch™ do?

A TACT Switch™ provides clear tactile feedback (click feel) when operated. It is operated manually, delivering an input signal to the device.

Explain the feeling curve (or force curve) of a TACT Switch™.

See the operating force – travel graphs below.
The feel indicated by the portion where the curve turns back is referred to as the click (tactile feedback). The bigger the reversal, the clearer it is to the user that the switch has been activated.

・What is sharp feel?
The feel created when using a metal spring. Sharp, satisfying tactile feedback.
Travel is short, usually between 0.1 and 0.3mm.

・What is soft feel?
The feel created when using a rubber spring. Soft, smooth tactile feedback.
Travel is usually between 1 and 2mm.

What is the structure of a TACT Switch™ with a sharp feel?

What is the structure of a TACT Switch™ with a soft feel?

What is double action in the context of TACT Switch™ products?

A structure that closes the first stage of the circuit with a light press on the stem and then closes the second stage of the circuit with a stronger press. It is therefore a keyswitch with two switch functions. The SKRN, SKSD, SKSK and SKTC Series are double-action TACT Switch™ products?

Explain the difference between top-push and side-push types of TACT Switch™.

A top-push TACT Switch™ is operated in a direction perpendicular to the PC board it is attached to. A side-push TACT Switch™ is operated in a direction parallel to the PC board.

How many poles (circuits) and throws (positions) does a TACT Switch™ have?

They are generally single-pole, single-throw (SPST), but double-action types are double-pole, double-throw (DPDT).

What are the insulation resistance, contact resistance and withstand voltage (voltage proof) of a TACT Switch™?

Insulation resistance refers to how hard it is for a current to flow (insulation performance) when the switch is open (off). It is normally specified as "100MΩ min." Low insulation resistance may result in issues such as current flowing even when the switch is open.

Contact resistance is the resistance value when the switch is closed (on). A consistently low contact resistance allows the equipment to operate normally. The resistance value may increase due, for example, to abrasion, foreign matter, corrosion or film formation.

Withstand voltage (voltage proof) is the maximum voltage the circuit can withstand (at which insulation will not break down) when the switch is open (off).

Do you have any waterproof TACT Switch™ models?

Yes. SKQB, SKSV, SKSW, SKTD, SKTG, SKRA, SKRC, SKTC, SKTA, SKTK and SKSU Series are waterproof models. For details, please view product specifications or contact us with an inquiry.

Do you have any dust-proof TACT Switch™ models?

Yes. SKQJ, SKHW, SKQK and SKTH Series are dust-proof models. For details, please view product specifications or contact us with an inquiry.

Do you have any TACT Switch™ models with a long operating life?

The SKQE Series has an operating life of 10 million cycles, the SKRR Series has a life of 5 million cycles, and there are models with an operating life of 1 million cycles. For details, please contact us with an inquiry.

Do you have any small TACT Switch™ models?

Our smallest TACT Switch™ is the SKTA Series, with dimensions of 2.6 × 1.6mm and a height of 0.53mm. The SKTA Series is mainly used as a control switch for smartphones and other portable devices. It is also a waterproof switch.

Which TACT Switch™ models are for automotive use?

Models listed with an automobile icon beside them in the product information section are for automotive use.

How long can TACT Switch™ products be stored?

Up to 6 months in the state we ship them.

What is the moisture sensitivity level (MSL) for TACT Switch™ products?

This does not apply to TACT Switch™ products as they do not absorb moisture in ambient temperature and humidity.

What is the solder heat resistance of TACT Switch™ products?

It varies for each product. Please refer to product specifications.

What are hand soldering conditions for TACT Switch™ products?

They vary for each product. Please refer to product specifications.

Do you recommend particular TACT Switch™ products for different uses?

Please refer to application examples or contact us with an inquiry.

What safety standards apply to TACT Switch™ products?

No safety standards apply to TACT Switch™ products as they are used with very low voltages and very small currents.

What is the difference between a TACT Switch™ with a projection and one without a projection?

The feel of a TACT Switch™ with a projection, like the SKSV Series, does not deteriorate when a key top is out of position. Models without a projection allow greater freedom in design at the customer's end as the height of the product is lower by as much as the height of a projection. Pick and choose depending on how the product will be used.

Can TACT Switch™ products be used in a held-down state?

We do not recommend operating them held-down. Please consider one of our detector switches instead.

Which TACT Switch™ products are RoHS-compliant/lead-free?

All our TACT Switch™ products are RoHS-compliant/lead-free.

Are there any points of caution for when hand soldering a TACT Switch™?

Avoid bringing the tip of the soldering iron into contact with resin parts and applying too much pressure to terminals as it could affect the performance of the switch.

Will TACT Switch™ products break from the impact of a drop?

A switch will break if subjected to an impact load. Please consider using a structure that prevents an impact load being applied to the switch (e.g. a key top that stays within the casing).

Are there any points of caution for when using a TACT Switch™ where there is lots of foreign matter?

To avoid contact failure due to ingress of foreign matter inside a switch, we recommend using a dust-proof/waterproof model.