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Best Alternatives to FHW1812IF100JST

Package: 1812Guangdong Fenghua Advanced Technology Holding Co., Ltd.ChokesInductance: 10 µHTolerance: ±5%Rated Current: 550 mADC Resistance (DCR): 1.0 Ω maxSelf Resonant Frequency: 65 MHz min

Finding a replacement for the FHW1812IF100JST 10µH inductor involves considering modern alternatives. While no direct drop-in parts were found, several functional alternatives offer better electrical performance in smaller packages, provided a PCB redesign is feasible.

AI replacement insight

Package riskhigh

Target is 1812 (4.5x3.2mm); all candidates are in different packages (e.g., 0806, 1210, 1212) requiring a new layout.

Electrical riskmedium

Candidates have looser ±20% tolerance vs. target's ±5%, which may affect performance in sensitive circuits. Current and DCR are generally better.

Can it be replaced directly?

No direct, pin-compatible replacement was identified. All suitable alternatives require a PCB layout change due to different package sizes.

Best replacement path

Redesign the PCB for a modern, smaller inductor like the TDK VLS3012CX-100M-1, which offers superior current handling and lower DCR. The change in inductance tolerance must be validated.

Main risk

The primary risk is the physical package mismatch, which necessitates a board redesign. A secondary risk is the looser inductance tolerance (±20%) of all candidates compared to the target's ±5%.

Recommended alternatives

5
SWPA5020S100MT package
SWPA5020S100MT

Sunlord

Needs validationhigh risk

High-current alternate with excellent DCR, but in a different package and with looser tolerance.

View details

Alternative comparison matrix

Feature / factorFHW1812IF100JSTSWPA5020S100MTTFM322512ALMA100MTAAVLS3012CX-100M-1Compatibility / risk
Package1812 (4.5x3.2mm)5020 (5x5mm)3225 (1210)3030 (1212)5020 (5x5mm) / 3225 (1210) / 3030 (1212) / 2016 (0806) — Requires PCB redesign.; TFM322512ALMA100MTAA: Requires PCB redesign.; VLS3012CX-100M-1: Requires PCB redesign.; WPN201610H100MT: Requires PCB redesign.
Tolerance±5%±20%±20%±20%±20% — Looser tolerance may impact circuit tuning.; TFM322512ALMA100MTAA: Looser tolerance may impact circuit tuning.; VLS3012CX-100M-1: Looser tolerance may impact circuit tuning.; WPN201610H100MT: Looser tolerance may impact circuit tuning.
Current0.55A1.55A1.2A1.12A1.55A / 1.2A / 1.12A / 0.65A — Significantly higher current rating (Irms).; TFM322512ALMA100MTAA: Higher current rating (Irms).; VLS3012CX-100M-1: Significantly higher current rating (Irms).; WPN201610H100MT: Higher current rating (Irms).
Dcr Ohm1.0Ω max0.11Ω0.36Ω0.324Ω0.11Ω / 0.36Ω / 0.324Ω / 0.688Ω — Significantly lower DCR improves efficiency.; TFM322512ALMA100MTAA: Much lower DCR improves efficiency.; VLS3012CX-100M-1: Much lower DCR improves efficiency.; WPN201610H100MT: Lower DCR improves efficiency.
ApplicationCommercial-AEC-Q200-AEC-Q200 — Automotive grade may be an upgrade.
Temperature-40°C to +85°C----40°C to +125°C — Wider operating range.

Application & sourcing insights

Questions & answers

The TDK VLS3012CX-100M-1 is a strong candidate. It offers significantly higher current ratings (1.12A) and lower DCR (0.324Ω), but requires a PCB redesign for its smaller package and has a looser ±20% tolerance.