Solutions for AC/DC Applications

Looking for the right parts to complement your AC/DC applications?

Start by reviewing the different types of AC/DC parts and our offerings from Wurth Electronics Midcom. Then, take a look at the AC/DC board level signal chain and relevant FAQs for various AC/DC products.

Remember, if you can’t find an AC/DC part from Wurth Electronics Midcom, we have custom solutions possible!

Types of AC/DC Components

There are several types of AC/DC components to consider when making your design:

  • WR-TBL Terminal Block (691401710004)
  • WR-FSH Fuse Holder (696xxxxxx)
  • WE-VS/VD Varistor (825xxxxxx)
  • WE-TFC Common Mode Choke (7446xxx) OR WE-LF Common Mode Choke
  • Rectifier*
  • WCAP-CSGP Smoothing Capacitor (88501xxx)
  • MOSFET*
  • WE-UNIT Transformer (75003xxx)
  • Rectifier*
  • Voltage Regulator*
  • WE-TPC Power Inductor (744028006) OR WE-PD Filter (744778003)

* Reference design available

AC/DC Board Level Signal Chain

To get an idea for the board level signal chain of an AC/DC application, here is what a typical signal chain for that application might look like:

A Note on EMC Feedback for AC/DC Applications

Due to the MOSFET high switching process, HF oscillation occurs with parasitic effects. Capacitive coupling between the heat sink and the drain of the MOSFET produces common mode interference.

To combat this interference, WE-TFC, WE-LF, or WE-CMB are needed. These components will prevent conducted emissions in your design.

Important Considerations for AC/DC Applications

Depending on what product you’re using for your AC/DC design, you may have some questions to consider. Check out these FAQs for various AC/DC products from Wurth Electronics Midcom.

FAQs for Filter/Storage Inductors ( WE-PD)

  • What is the inductance?
  • What is the current?
  • What is the switching frequency?
  • What size?

FAQs for AC Common Mode Chokes ( WE-LF, WE-CMB)

  • What is the current?
  • What is the frequency?
  • What is the inductance?
  • What size?

FAQs for Varistors ( WE-VS/WE-VD)

  • Is the part THT or SMT?
  • What is the size?
  • What is the voltage rating?
  • What is the peak current?

FAQs for Terminal Blocks ( WR-TBL)

  • What is the number of pins needed?
  • What type? (Rising clamp/screw; catalog)
  • What is the current?
  • What is the pitch? (mm between pins)

FAQs for Transformers ( WE-UNIT)

  • What is the size?
  • What is the VINand VOUT?
  • What is the IIN and IOUT?
  • What is the frequency?

FAQs for Capacitors ( WE-CSGP)

  • What is the size?
  • What is the VIN and VOUT?
  • What is the IIN and IOUT?
  • What is the frequency?

Custom Solutions Possible!

Can't find an AC/DC part from Wurth Electronics Midcom that fits your needs?

We will make one that works!

Check out our Custom Capabiltes Catalog, or fill out our Custom Design Request to get started!

(Psst: Check out our solutions for DC/DC applications as well!)