Categories: Relays & Contactors

  • February 21, 2012
    Relay Contact Resistance Contact resistance is a crucial electrical characteristic. The resistance between the contact terminals determines the Relay's ability to carry current. The contact resistance is subject to change during the life of the Relay. Based on lab investigations and testing, abnormal contact resistance has often been found with the following conditions:
  • January 24, 2012
    PhotoMOS Relays In previous articles, we've shown how a PhotoMOS works, and how to optimize certain characteristics. Here, we talk about the balance between Output Capacitance  and On-resistance (C vs R).
  • January 19, 2012
    PhotoMOS Relays In the last PhotoMOS blog post, we discussed how to select the correct capacitor for the application. Now we'll move on to switching time. Minimizing Turn-on Time There are some cases where turn-on time is crucial, and the circuit designer must find ways to reduce the amount of time it takes from applying the LED forward current, until the MOSFET gate is closed. Typically, higher LED current will lead to faster switching time. On the other hand, it will increase power consumption and reduce the LED life. 
  • January 10, 2012
    PhotoMOS Solid State Relays In an earlier blog post, we described the principle of operation of a PhotoMOS solid state Relay. Now we'll look at some considerations when designing the circuit around the PhotoMOS.
  • December 29, 2011
    PhotoMOS With Short Circuit Protection  Small size, reliability and low power consumption are the requirements for components used to switch signal outputs in sensors, control units or on measurement cards. An important function is the galvanic isolation of sensitive electronics from possible disturbances on the output side, e.g. voltage peaks or overcurrents, which can arise due to short circuits or improper use. Panasonic's new short-circuit protected PhotoMOS Relay family is optimally prepared to meet these challenges.
  • December 20, 2011
    I am sometimes asked if Panasonic’s precision components meet the various UL: Underwriters Laboratories industry standards.
  • December 01, 2011
    An Introduction To Relays  A Relay is an electrical component whose output is controlled in an open or closed position by applying or removing drive voltage from an electrically isolated circuit. For many years, electromechanical Relays were the only choice to perform such a function. During the last two decades, however, new technologies have emerged enabling semiconductors to switch output circuits with an electrical control signal via electronic, magnetic, optical or other means that require no mechanical movement.
  • November 22, 2011
    Reading Date Codes Date codes, or lot numbers, are used in manufacturing to identify when a component was made. It can be used for production quality control, as well as tracing purposes in the factory. Panasonic uses three different code formats to identify the date on a Relay: