FAQ - KHAN ELECTRONIC

Q:What are the advantages of gold contacts on switches？

Gold contacts main advantage over silver is that they tarnish less easily.

Q:What are the disadvantages of silver contacts on switches?

A disadvantage to using silver contacts, however, is that they can be easily tarnished by moisture and airborne contaminants.

Q:What are the advantages of silver contacts on switches?

Silver is the most common type of contact material for switches. First off, silver contacts are less expensive than gold. Second, silver contacts can operate with a greater range of voltages and currents compared to gold. Third, silver contacts have a very low contact resistance.

Q:What is Operating Force?

Operating Force refers to the amount of force applied to the switch’s actuation mechanism to change the motion or cause the contacts to snap over. More simply put: how hard you have to press a switch to make it work.

Q:What is Normally closed (NC) Switch Contact?

An example of a device using normally closed contacts is an emergency stop button on a machine. The machine will keep running until you press the emergency stop button, thus opening the circuit and stopping the machine.

Q:What is Normally open (NO) Switch Contact?

An example of a device using normally open contacts is a doorbell. A doorbell doesn’t ring on its own, you have to push the button. Pushing the button closes the circuit, making the doorbell ring.

Q:How to Convert AC to DC Voltage?

The simplest and most effective means of converting Alternating Current to Direct Current is through a circuit component called a rectifier.

Q:Contact Resistance vs. Insulation Resistance: What’s the Difference?

Contact resistance is about ensuring good electrical connections, while insulation resistance is about preventing unwanted electrical paths.

Q:How do I know if a part number is RoHS certified?

All our switches comply with RoHS standards.

Q:What are tact switches good for ?

Tact switches are a type of switch that focus on producing a tactile bump and a relatively quiet audible click with each keystroke. When typing you know by the sound and feel everything is working properly.

Q:How to determine the waterproof rating of the waterproof tact switch?

The waterproof tact switch is an electronic tact switch with waterproof function. The waterproof tact switch is widely used. The tact switch can be really waterproof, and needs to reach the IP67 level

Q:What does normally open (NO) mean on a solenoid valve?

A normally open solenoid valve is open in the valve's de-energized state. When current flows through the solenoid, a normally open solenoid valve closes.