CUSTOM NANOCRYSTALLINE CORE SPECIFICATION
CenturaCores RFQ Template | https://centuracores.com/resources/custom-nanocrystalline-core-rfq-template/
Companion guide: https://centuracores.com/articles/how-to-specify-custom-nanocrystalline-cores/

Buyer: ____________________  Date: __________  Rev: ____
Company: __________________  Contact / email: ____________________

1. FUNCTION
   [ ] CMC/EMI  [ ] Metering CT  [ ] Protection CT  [ ] RCD  [ ] HF transformer  [ ] Other: ____
   One-line duty: _______________________________________________

2. ELECTRICAL / MAGNETIC OPERATING POINT
   Frequency: ____ Hz / kHz (range: ____ to ____)
   Waveform: [ ] sine [ ] square [ ] PWM  Duty: ____
   Form factor kw (info): ____ (e.g. 4.44 sine / 4.0 square)
   Bpk or V·s: ____ T or ____ V·µs   Margin for transient: ____%
   Temp: ambient ____°C  hotspot ____°C
   Max core loss: ____ W (or ____ W/kg) at B=____ T, f=____, T=____°C
   Ribbon thickness class: [ ] 20–25 µm  [ ] ≤18 µm  [ ] other: ____

3. PERMEABILITY / AL (enforceable)
   Target: µi or µe ≥ ____  OR  AL ≥ ____ nH/N²
   Test: f=____, H=____ A/m (or B=____ mT), T=____°C, fixture: ____
   Loop / anneal: [ ] R-round  [ ] Z-square  [ ] F-flat (transverse, low Br, DC bias)
   Br/Bs limits if any: ____
   Note: R/Z/F is supplier shorthand. State remanence and bias needs explicitly.

4. APPLICATION EXTRAS
   CMC: Iline=____ A; Zcm/IL table attached; max ΔI/surge=____ A
   CT: class=____; burden=____ VA (meter + wiring); Is=____ A; ALF/Vk=____; Rf=____ kA
   RCD: IΔn=____ mA; bandwidth=____

5. GEOMETRY
   Shape: [ ] toroid [ ] oval [ ] rect [ ] C-cut [ ] E [ ] other
   Drawing No: ________  OD/ID/HT or A/B/C: ________
   Gap (if cut): g=____ mm; faces: ____
   Finish: [ ] bare [ ] epoxy [ ] case ______  Color/marking: ____
   Stacking factor assumption for design: Kstack=____ (info only; typically 0.75–0.85)

6. ENVIRONMENT / MECHANICAL
   Mounting: ____  Clamp limits: ____  Potting/PCB notes: ____
   Packaging: export anti-vib / moisture barrier required: [ ] Y [ ] N

7. QUALITY
   Reports required: dimensions, µ/AL, loss, (CT excitation), FAI
   Sampling: ____

8. COMMERCIAL
   Qty: proto ____ / prod ____   Target lead time: ____
   Ship to: ____

ATTACHMENTS
   [ ] Dimensioned drawing (PDF)  [ ] IL/Zcm table  [ ] Excitation / burden notes  [ ] Other: ____

Submit with your drawing via https://centuracores.com/request-quote/
Or open the Core Designer: https://centuracores.com/tools/custom-transformer-core-designer/