Switches

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 is the difference between shorting and non-shorting as the changeover timing for switches?

When switching between circuits, "shorting" indicates the changeover occurs after an electrical connection is momentarily made across the terminals, "non-shorting" indicates that electrical connections between terminals are momentarily broken.

What are the different contact structures for switches?

• Sliding (wiping) contact
A contact with a structure that keeps the contact surface clean, removing insulating material between fixed and moving contacts by mechanical friction. The structure works excellently with very small currents. Sliding contacts are either double-sided, with the moving contact clamping the fixed contact from both sides, or single-sided, where the moving contact presses into one side.

・Butt contact
A contact structure where the moving contact collides with the fixed contact. Contact problems may occur if insulating material gets in the way.

What do "x-pole, x-position" and "xPxT" in switch circuit configuration mean?

Circuit configuration for switches is represented by numbers of circuits and numbers of contacts (positions). Notation for switches used with very small currents is "x-pole, x-position." The number of circuits that a switch can control is also expressed in "poles," and the numbers of contacts that can be controlled simultaneously is expressed in "throws."

What is recoil in the context of slide switches?

Recoil (spring return) is when the lever stays where it has been operated sideways only while held and returns to its initial position when the force is released. There are three types of recoil depending on the direction of lever operation. Slide switches operated only to the left are "left-side recoil," those operated only to the right are "right-side recoil." Products that slide in both directions are "double-side recoil."

What are the different types of push switch action?

・Latching
When the control (knob) is pushed, the switch closes and stays closed (on). The knob stays locked in the depressed position. Push the knob again and it is released, returning to its initial position.

・Momentary
The switch stays closed (on) only while the knob is pushed. Take your finger off and the knob returns to its initial position as the switch opens (switches off).

・Alternate
When the knob is pushed, the switch closes and stays closed (on), but the knob returns to its initial position. Push the knob again and the switch opens (switches off), with the knob again returning to its initial position. This returning of the knob to its initial position in both on and off states is what distinguishes an alternate action from a latching action.

What are normally open and normally closed switches?

・Normally open
The switch is normally open (off) and closes (switches on) when operated.

・Normally closed
The switch is normally closed (on) and opens (switches off) when operated.

What are power switch safety standards?

Safety standards are established by countries, or organizations on their behalf, to lay down uniform safety guidelines for products and parts that use electricity in order to protect ordinary consumers against electric shock and fire risks.

What are IP67 and IP68 in the context of waterproof switches?

Ingress Protection (IP) ratings grade the degree of protection an enclosure provides against dust and water.

IP67: The first digit represents the level of protection against the ingress of solid foreign objects, with "6" indicating complete protection against the ingress of dust. The second digit represents the level of protection against the ingress of water, with "7" indicating there will be no ingress of water when the enclosure is immersed in water under specified conditions of pressure and time. Test conditions are immersion for 30 minutes at a depth of one meter.

IP68: A second digit of "8" indicates that the equipment can be used underwater. Test conditions are determined through agreement with the user.

What is the contact resistance of a switch?

Contact resistance indicates the electrical resistance of the part of a contact that makes contact. It includes the electrical resistance of conductive parts of springs and terminals.

What is the insulation resistance of a switch?

Insulation resistance indicates the resistance between open contacts, between terminals and control shaft (lever) or between terminals and switch body.

What is the withstand voltage (voltage proof) of a switch?

Withstand voltage (voltage proof) is the maximum voltage at which insulation will not break down when a high voltage is applied between open contacts, between terminals and control shaft (lever) or between terminals and switch body.