I guess you are right. It _IS_ confusing.

If we assume a certain DC current, there are two ways to reach a desired core operating point:
1. With a given coil, adjust the core air-gap or
2. With a given core air-gap, adjust the number of turns on the coil

The type number LL1660S/18mA is designed such that at 18mA DC current and ALL PRIMARY WINDINGS CONNECTED IN SERIES, the core operating point is 0.9T But if you connect the windings in a different way (such as suggested in ”Alt B”), the number of magnetizing turns will be different, and the core will have a different operating point unless you change the DC current.

So for LL1660S/10mA, used in connection ”Alt B”, the necessary DC current required to reach the operating point 0.9T is 18mA

I hope this is an answer to your question.

Help is on its way

Thank you for seeking help from our experts. Your request has been forwarded to our internal experts for prompt assistance. We will get back to you shortly. In the meantime, please check your email for further updates.


Thank you for your message, we will answer you shortly