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Murata Electronics LQH43MN821J03L — Inductors & Chokes

Murata LQH43MN821J03L 820 µH Inductor, 60 mA, 1812

MPNLQH43MN821J03L
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Murata Electronics LQH43 series, Drum Core Wirewound Inductor, 820 µH, 60 mA, Unshielded, 1812 (4532 Metric), ±5%.

$0.4900Ref. price · indicative, final on quote
Murata Electronics LQH43MN821J03L datasheet (PDF)
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

LQH43MN821J03L specifications
ParameterValue
TypeDrum Core, Wirewound
SeriesLQH43
MountingSurface Mount
Current rating60 mA
Frequency - self resonant2.2MHz
Inductance frequency - test1 kHz
Operating temperature-40°C~85°C
Material - coreFerrite
Size (Dimension)0.177\" L x 0.126\" W (4.50mm x 3.20mm)
Height - seated0.110\" (2.80mm)
PackageTape & Reel (TR); Cut Tape (CT)
Q @ freq40 @ 796kHz
ShieldingUnshielded
Tolerance±5%
Inductance820 µH
Case1812 (4532 Metric)
DC resistance20.5Ohm Max

Product details

820 µH wirewound for low-current filtering and bias-T circuits

The Murata LQH43MN821J03L is a drum-core wirewound inductor in the LQH43 series, delivering 820 µH inductance in a standard 1812 (4532 Metric) surface-mount package. Rated at 60 mA with a maximum DC resistance of 20.5 Ohms, this part suits low-current power supply filtering, bias-T networks, and noise suppression where the DC bias stays under 60 mA.

Unshielded construction and self-resonant frequency

This inductor is unshielded, meaning the magnetic field radiates from the drum core — keep it spaced from sensitive analog traces or adjacent magnetics to avoid coupling. The self-resonant frequency is 2.2 MHz; above that the impedance turns capacitive, so the part is best used well below that frequency for inductive filtering. Q factor is 40 at 796 kHz, giving moderate efficiency in the low-MHz range. The ferrite core material handles the 820 µH value with a ±5% tolerance, tested at 1 kHz.

Frequently asked questions

What is the closest pin-compatible alternative to the LQH43MN821J03L in the LQH43 series?

Within the same LQH43 series and 1812 package, the closest alternative would be a different inductance value — there is no exact 820 µH ±5% replacement with the same current rating. For a BOM second-source, look for other Murata 1812 wirewound inductors in the LQH43 family at the same inductance and tolerance, then verify the DCR and current rating match your derating margin.

What compliance documentation does Murata provide for the LQH43MN821J03L?

Murata typically provides RoHS and REACH compliance declarations for the LQH43 series. The part does not carry UL or IEC certifications — those are not standard for discrete wirewound inductors of this class. Compliance documentation is available from the manufacturer or through your sourcing channel upon request.