Hero Section: The Solution

Headline:

Compact 8-Shaped Inductors: High Inductance with Optimized Airflow

Sub-headline:

Engineered for space-constrained high-power circuits. Our Compact 8-Shaped Inductor series brings the thermal benefits of the Figure-8 structure to a smaller 59mm footprint, offering superior heat dissipation and magnetic stability compared to standard toroidal chokes.

Key Highlights:

Space-Efficient Cooling: The unique figure-8 winding structure creates a central air gap, preventing heat accumulation even in a compact form factor.

High Inductance Density: Achieves 740µH of inductance using high-permeability Sendust Cores, ideal for filtering in mid-range inverters.

Vertical Stability: Designed with a 4-pin vertical base to minimize PCB footprint while ensuring secure mechanical mounting.

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Reference Case Study: Model HPI5940-741K

Note: The specifications below are from our production model HPI5940. This demonstrates our manufacturing capability for Compact Figure-8 Inductors.

Parameter	Specification (Reference Only)	Customization Range
Model P/N	HPI5940-741K	Custom P/N assignment available
Category	8-Shaped Inductor	Inverter Choke / Filter Inductor
Dimensions	59.0 x 40.0 x 26.0 mm (Max)	Scalable (e.g., 40mm - 80mm)
Inductance (L)	740 µH ± 10% (@1kHz/0.3V)	10µH - 2.0mH (Optimized for Size)
DCR (Resistance)	135 mΩ Max	Minimized by wire gauge
Wire Specs	0.65mm UEW (76 Turns)	Multi-strand / TIW available
Core Material	KSN157026A (Sendust)	Sendust / High Flux / MPP
Mounting	Vertical 4-Pin Base	Adhesive Fix / Screw Mount

Engineer's Insight: The HPI5940 balances size and performance. It uses a Sendust (KSN) core wound with 76 turns of 0.65mm wire to achieve 740uH. Despite its inductance, the Figure-8 separation ensures the windings don't overheat, maintaining a DCR below 135mΩ.

Tailor This Inductor to Your Needs

We leverage the Figure-8 design to solve thermal issues in compact devices.

Why "Figure-8" for Compact Designs?

● Airflow Optimization: In tight enclosures (like 1U/2U server power supplies), airflow is restricted. The split-coil design of the 8-Shaped ● Inductor allows cooling air to pass through the component, not just around it.

● Magnetic Shielding: The dual-coil structure offers a degree of self-shielding, reducing the radiated magnetic field compared to open bobbin inductors, which is critical in compact PCB layouts.

Customization Flexibility

● Core Material: We recommend Sendust (Kool Mµ) for the best cost/performance ratio in switching applications. For higher saturation requirements in small spaces, High Flux cores are available.

● Mechanical Fit: The HPI series base can be customized with different pin pitches (Reference: 28mm x 18mm) to match your existing PCB layout.

Industries We Serve

Typical applications for our Compact 8-Shaped Inductors.

Power Amplifiers:

Audio output filtering requiring low distortion and low leakage.

Mid-Range Inverters:

1kW-3kW solar micro-inverters.

Industrial Power:

48V/60V DC power supplies for telecom.

Medical Equipment:

Low-noise power filtering for sensitive instruments.

Quality Assurance & Testing

Strict verification for performance consistency.

Inductance Verification: 100% tested (740µH) to ensure filtering characteristics.
DCR Measurement: Precision resistance check (< 135mΩ) to guarantee efficiency.
Turn Count: Verified 76 Turns to ensure correct magnetic saturation point.
Base Alignment: Automated inspection of pin pitch (28.0mm / 18.0mm) for easy assembly.