Can You Change a 10-Pin Transformer to an 8-Pin One Without Affecting Quality?

Click For Summary
SUMMARY

The discussion centers on the implications of replacing a 10-pin transformer (BEPC-13-1110CPH) with an 8-pin transformer (BEPC-10-118GA). Key points include the necessity of matching the ferrite core's AL value to maintain performance and the potential for magnetic saturation issues when using a smaller core. The participants emphasize that the number of pins does not inherently affect quality; rather, it is crucial to ensure that the transformer meets the application's electrical requirements. The conversation also highlights the importance of understanding transformer basics for effective design and selection.

PREREQUISITES
  • Understanding of transformer design principles
  • Knowledge of ferrite core specifications and AL values
  • Familiarity with PCB design and electrical engineering concepts
  • Ability to interpret transformer datasheets
NEXT STEPS
  • Research "transformer magnetic saturation" and its effects on performance
  • Learn about "ferrite core AL values" and their significance in transformer design
  • Explore "transformer design articles" from manufacturers like Coilcraft and Magnetics Inc.
  • Investigate "AC-DC power supply design" for practical applications
USEFUL FOR

Electrical engineers, PCB designers, and anyone involved in transformer selection and design, particularly in applications requiring precise electrical specifications.

  • #31
Are those UL Recognized Components or UL Listed Products? I'm guessing they are Recognized Components, since they do not have the AC Mains connections yet (with switch & fuse & grounding, etc.)?

UL Recognized Components:
http://www.ul.com/global/documents/offerings/perspectives/regulators/technical/ul_RecognizedComponentMarks.pdf

UL Listed Products:
http://www.ul.com/global/eng/pages/offerings/perspectives/newtoul/ulmarkproductcertification/

What do the UL labels look like on those power supplies? I've used them in products before, but don't remember what the labels looked like...
 
Engineering news on Phys.org
  • #32
berkeman said:
Are those UL Recognized Components or UL Listed Products? I'm guessing they are Recognized Components, since they do not have the AC Mains connections yet (with switch & fuse & grounding, etc.)?

UL Recognized Components:
http://www.ul.com/global/documents/offerings/perspectives/regulators/technical/ul_RecognizedComponentMarks.pdf

UL Listed Products:
http://www.ul.com/global/eng/pages/offerings/perspectives/newtoul/ulmarkproductcertification/

What do the UL labels look like on those power supplies? I've used them in products before, but don't remember what the labels looked like...

I just found an image that looked [STRIKE]like[/STRIKE] similar to the open frame supplies I used years ago. At that time, they had this label:

200px-UL_Mark.svg.png
 
Last edited:
  • #33
Evidently "UL is introducing an enhanced version ..."

ul_markshub_certified_logo.png


http://www.ul.com/global/eng/pages/corporate/aboutul/ulmarks/
 
  • #34
I'm guessing that the supplies you used before were the versions that included the power-entry module (IEC connector, fuse, switch). They come in both versions -- with and without power entry module -- for some of the models. When there is no power entry module (just connector lugs for the AC Mains input from a separate power entry module), they almost certainly will be UL Recognized Components, I believe, like the UR(backwards) logo on this open frame power supply:

http://store.flw.com/products/international-power-single-output-linear-power-supply-if24-12.html
 
  • #35
berkeman said:
I'm guessing that the supplies you used before were the versions that included the power-entry module (IEC connector, fuse, switch).
Yes. If I remember correctly, the power-in leads were to be soldered to Line (fuse), Neutral, and Ground terminals.
 
  • #37
No, I am not going to design anything. I am just looking for some parts, so I can hand them for electrical expert to check the options

it's time to show him those datasheets and let him decide whether he wants to undertake redesigning around a different core.

old jim
 
Last edited by a moderator:

Similar threads

Modern Digital Audio: Understanding Dither and Oversampling in Hi-Res Age
  • · Replies 17 ·
Replies
17
Views
5K
RadioInstigator: Building a SIGINT
  • · Replies 5 ·
Replies
5
Views
4K