Scr / thyristers

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • johnfin
    Senior Member
    • Oct 2017
    • 115
    • united states of america

    #1

    Scr / thyristers

    If the schematic calls for a 200v scr can i replace it with a 400v scr?
  • R_J
    Badcaps Legend
    • Jun 2012
    • 9535
    • Canada

    #2
    Re: Scr / thyristers

    Yes, as long as the other parameters ar also as good or better ie: current

    Comment

    • Longbow
      Badcaps Veteran
      • Jun 2011
      • 623
      • USA

      #3
      Re: Scr / thyristers

      That particular spec means that the device has to withstand at least 200v. reverse. But there are other important specs with thyristors, especially the turn-on voltage and turn-on pulse width required. Also, you need to look at requirements for the reverse voltage width. If too narrow, the SCR won't turn off. Or, you could just slap in the replacement and look for smoke (just kidding).
      Is it plugged in?

      Comment

      • sam_sam_sam
        Badcaps Legend
        • Jul 2011
        • 6030
        • USA

        #4
        Re: Scr / thyristers

        What are you going to use it for resistance load or on a inductive load ?
        Last edited by sam_sam_sam; 01-20-2018, 04:28 PM.

        Comment

        Related Topics

        Collapse

        • spleenharvester
          Reverse engineering of 18650 4-channel tester
          by spleenharvester
          Hi friends

          I have reverse engineered this tester, schematic is attached and is complete except for capacitor values. These testers annoyingly have no model number but they are the ones you find on the first page of just about any website if you type in "18650 4-channel tester". There is also a 2-channel variant and a newer 8-channel variant. They are very cheap (about £15) and can measure voltage, current, internal resistance and capacity. They have a multicolour display for all these statistics. They also have terminal blocks so that if you want to use a breakout board...
          05-04-2025, 02:43 AM
        • Dev Goose
          Help Needed: Reverse Polarity Issue on HP EliteBook 840 G4 – Where Do I Begin?
          by Dev Goose
          Hi everyone, I recently acquired an HP EliteBook 840 G4 (6050A2854301-MB-A01) that I'm hoping to bring back to life. I'm fairly new to laptop repairs but eager to learn and willing to put in the effort to understand and fix this. Any advice or guidance would mean a lot!


          What Happened
          The issue started when the laptop was accidentally plugged in with reverse polarity. Before this incident, the laptop would show a power/charging light whenever it was plugged in. However, now it's completely unresponsive—no lights, no power, nothing. I've been doing some research and understand
          ...
          12-13-2024, 03:13 AM
        • jinu_j
          Query on preventing reverse flow
          by jinu_j
          Hi Folks

          I need your help in a design problem. I have a power source that provide 3.3V, 5 V, +12V, and -12V. Each output is rated at 5A individually. Now i need to create a 4 way switch which will allow me to select the output I want. Unfortunately cannot find a 5 way rotary switch that can handle 5A. The ones i find are too big and used for main electricity board. Hence not suitable for my project.

          So what i was thinking was to do the following
          - Use normal 5 way rotary switch rated for 500mA.
          - Connect the output of this to 4 channel 5V relay. So...
          02-12-2022, 12:33 AM
        • nix30101
          Thoughts on Reverse Engineering 8FC8 suffix logic..
          by nix30101
          Greetings i am in the process of reverse engineering the bios logic for the 8FC8 suffix so far I have found most of the bios functions related to the suffix from a bios dump and I have verified inputs and outputs to test with plus the chartable for the 8FC8 suffix.
          12-16-2024, 12:50 PM
        • jm1234
          Yageo 400V 680uF measuring 580uF
          by jm1234
          Hi,
          I have a Yageo 400V 680uF that is currently measuring 580uF (Measured by UNI-T UT603). Does that normally qualify for replacement?
          Details: Siemens tumble dryer getting Error 25 after an hour or so, on all last 3 runs.
          I checked the circuit boards quickly and this capacitor sticks out, nothing visible, not even bulging though. It costs 12euro, so I'd like to get your feedback first. The main thing on that board seems to be a motor controller (for the compressor) https://www.mouser.sk/ProductDetail/...xvzUNHBQ%3D%3D.
          Thanks...
          01-12-2024, 10:13 AM
        • Loading...
        • No more items.
        Working...