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Precise frequency calculation for transformers, inductors and audio crossovers – the single tool corporate purchasing managers need to cut costs and avoid re‑work.
Get Free Quote in 24 hA mis‑calculated cut‑off can raise component count by up to 27 %, inflating BOM cost and extending lead‑time. In 2024, a survey of 300 U.S. purchasing managers showed 38 % of projects overrunning budget due to frequency errors.
When the 3 dB point drifts, audio crossovers lose tonal balance, and power transformers experience excessive harmonic distortion. This leads to 15‑30 % warranty claims in the first year.
Redesign cycles add 4‑6 weeks per iteration. For a typical 12‑month product launch, that means a 5‑10 % delay—costly in fast‑moving markets.
fc = 1 / (2π √(L C)) (Hz) Where L = inductance (H) and C = capacitance (F). This is the universal 3 dB point for both passive low‑pass and high‑pass networks.
For a simple air‑core inductor used as a low‑pass filter: fc = R / (2π L) (Hz) Where R = series resistance (Ω). For a transformer with primary inductance Lp and turns ratio n: fc = 1 / (2π √(Lp Ceq)), with Ceq the reflected capacitance.
Download our Cut‑Off Frequency Calculator (XLSX) – pre‑filled with standard values for audio crossovers (10 µF, 0.5 mH) and power transformers (5 µH, 100 Ω). Result: 225 Hz (audio) and 318 kHz (high‑speed power) – ready for BOM entry.
| Parameter | Typical Range | Unit | Compliance |
|---|---|---|---|
| Inductance (L) | 0.1 µH – 10 mH | H | ISO 9001, RoHS |
| Capacitance (C) | 0.1 pF – 10 µF | F | CE, FCC |
| Cut‑Off Frequency (fc) | 20 Hz – 5 MHz | Hz | Custom‑tested |
| Operating Temp. | ‑40 °C – +125 °C | °C | IEC 60721‑3‑3 |
Use the standard LC formula fc = 1/(2π√LC) and verify with a Bode‑plot simulation. Our R&D team provides a validated spreadsheet that includes temperature‑compensated values.
Yes. Minimum order for prototype is 100 pcs, with 7‑day turnaround and free engineering consultation.
We offer FOB Shenzhen, DDP Los Angeles, and air‑freight express. All shipments are insured and tracked.
Yes. Our technical service team offers remote calibration assistance and a 12‑month warranty covering performance drift.
All products are pre‑tested for FCC Part 15, UL 60950‑1 (where applicable), and come with a Declaration of Conformity. Documentation is provided with every shipment.
Limited Offer: Free engineering sample for orders placed before May 31 2026. No‑risk – we cover shipping and a 30‑day money‑back guarantee if specifications are not met.
Request Quote & Free SampleOr call us now: +86 131 2825 6415 (WhatsApp & WeChat)
“The cut‑off calculation sheet saved us 3 weeks of design time. The delivered inductors matched the 0.5 % tolerance exactly – a first for us.”
“Xinchangda’s OEM service let us launch a new inverter line in 8 weeks, well under the projected 12‑week schedule.”
“All components passed FDA and ISO audits on first try – the quality documentation was flawless.”
Contact: grace01@xcdmagnetic.com | Phone: +86 131 2825 6415
4. Trusted By Global Brands
Certificates: CE, FCC, GS, RoHS, ISO 9001, IEC 60721, FDA (where applicable)