# LQM21DH330M70L

**Murata Electronics** · Inductors (SMD) · 0805

LQM21DH330M70L from Murata Electronics, in a 0805. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | Terminal 1 | passive | One end of the 33 µH ±20% winding (inductance at 1 MHz), 2.30 Ω typ / 2.99 Ω max DC resistance, rated 80 mA (inductance-change basis) or 200 mA at 150°C ambient (temperature-rise basis). |
| 2 | Terminal 2 | passive | Other end of the 33 µH winding, interchangeable with terminal 1, with self-resonant frequency of 16 MHz min. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Murata Electronics |
| Package | 0805 |
| Category | Inductors, Coils, Chokes |
| Pins | 2 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Inductance (nominal) |  |  | 33 |  | µH | Measured at 1 MHz, 1 mA (Keysight 4294A), per 7.1 | 1 |
| Inductance tolerance |  | -20 |  | 20 | % |  | 1 |
| DC resistance |  |  | 2.3 | 2.99 | Ω | Digital multimeter, per 7.2 | 1 |
| Self-resonant frequency |  | 16 |  |  | MHz | Keysight 4294A, per 7.3 | 1 |
| Inductance change at rated current |  | -50 |  | 50 | % | When rated current is applied | 1 |
| Temperature rise at rated current |  |  |  | 40 | °C | When rated current is applied; self-generated heat | 1 |
| Inductance change after high temperature exposure |  | -50 |  | 50 | % | After 1000 h at 150°C (AEC-Q200 item 3) | 3 |
| Inductance change after temperature cycling |  | -50 |  | 50 | % | After 1000 cycles, -55°C to +150°C (AEC-Q200 item 4) | 3 |
| Inductance change after biased humidity |  | -50 |  | 50 | % | After 1000 h at 85°C, 85% RH, unpowered (AEC-Q200 item 7) | 3 |
| Inductance change after operational life |  | -50 |  | 50 | % | After 150°C, 1000 h (AEC-Q200 item 8) | 3 |
| ESD rank 4 (HBM) |  | 6 |  | 8 | kV | Rank 4: 6 kV to < 8 kV, per AEC-Q200-002 | 3 |
| Operating temperature range |  | -55 |  | 150 | °C | Including self-generated heat, per chapter 3 (rated current derates above ambient 125°C) | 1 |
| Storage temperature range |  | -55 |  | 150 | °C |  | 1 |

## CAD (KiCad official)

- Symbol: `LQM21DH330M70L`
- Footprint: `Inductor_SMD:L_0805_2012Metric`
- 3D model: 0805 (KiCad packages3D, STEP)
- 3D model files: `lqm21dh330m70l-etched.step` / `lqm21dh330m70l-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `lqm21dh330m70l.step` / `lqm21dh330m70l.glb` are the bare package body.

## Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

- **Datasheet:** [Murata Electronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8589031935897448448) (9 pp, sha256 `2d441572c21e228e`, retrieved 2026-11-07, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/lqm21dh330m70l-datasheet.pdf)