Bridging the gap from design to production in a smarter, faster process.
In power electronics development, the prototyping stage is a time of dilemmas. We know the problems, and we have the answers.
- Supplier Lead Times
- Project Schedules
- Core Availability
- Performance Testing
- Customization
- Representative Prototypes
- Alternate Design Trials
- Production Approval Samples
Thanks to our design and production capabilities, prototyping with Spang Engineered Solutions can help you to navigate the dilemmas of the middle stages of development. Allowing you to reach production on schedule and in spec. We are here to meet any unique needs, fast.



Common Prototyping Problem
Getting custom transformers and inductors takes too long. What I need is not off-the-shelf, but I cannot wait weeks or months to try a custom part.
Solution
We offer immediate access to various core materials and custom 3D-printed bobbins, allowing us to provide prototypes for our customers quickly. With winding capabilities in the United States and China, Spang Engineered Solutions can shorten your design cycle by minimizing time waiting for prototype production.
Common Prototyping Problem
I could have my prototype magnetics sooner, except the winder says they are waiting for cores.
Solution
We offer immediate access to a wide variety of core materials from the industry leader, Magnetics, a division of Spang, as well as other highly qualified suppliers with rapid lead times.
Common Prototyping Problem
I want to try different transformer or inductor designs so I can compare how they behave in my circuit.
Solution
No problem. Our engineers routinely offer parallel designs to explore trade-offs. We work alongside you to optimize electrical performance, package size, and cost.
Common Prototyping Problem
My design will be challenging to wind. No company seems interested in building my proof-of-concept model.
Solution
Our engineers are knowledgeable in the most advanced techniques to offer products that are both unique and manufacturable.
Common Prototyping Problem
Production parts built in China will not be the same as prototypes made in the US.
Solution
At SES, materials are specified in the United States, and assembly and testing equipment is replicated between our United States and China facilities. When using equivalent materials, we ensure they meet our standards for true equivalence.
Common Prototyping Problem
I am required to have magnetic devices built in China for production approval, but I cannot get a supplier to build small quantities at the factory.
Solution
SES China manufacturing operates with a focus on responsiveness. We deliver proper manufacturing approval samples when you need them. Unlike other companies, our facility is Spang-owned and operated, not a joint venture or third-party manufacturing.