component
LMERW250F5M10Q9L
Public Made by Adomby adom
RESI Chip Resistor - Surface Mount, MELF. Unpolarised two-terminal part: the datasheet prints no pin numbers, so pins 1 and 2 follow the library convention, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownLMERW250F5M10Q9L
RESI · Chip Resistor - Surface Mount · MELF
LMERW250F5M10Q9L from RESI, in a MELF. 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 | 1 | passive | Terminal 1 of an unpolarised resistor; either orientation. |
| 2 | 2 | passive | Terminal 2 of an unpolarised resistor; either orientation. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | RESI |
| Package | MELF |
| Category | Resistors |
| 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 |
|---|---|---|---|---|---|---|---|
| Tolerance (F = ±1%) | -1 | 1 | % | Part-number code F = ±1% | 1 | ||
| Temperature coefficient (Q = ±50ppm) | TCR | -50 | 50 | ppm/°C | Part-number code Q = ±50ppm | 1 | |
| Maximum working voltage | 250 | V | LMERW250 value, inferred from row-major table order | 1 | |||
| Maximum overload voltage | 500 | V | LMERW250 value, inferred from row-major table order | 1 | |||
| Operating temperature range | -55 | 125 | °C | 工作温度 -55~+125°C | 1 | ||
| Rated power | 0.25 | W | Rated at 70°C ambient (W250 = 0.25W) | 1 | |||
| Reflow peak temperature | 260 | ℃ | 260℃ 最大值 on reflow profile; solder time 3s~6s as printed | 2 |
CAD (KiCad official)
- Symbol:
LMERW250F5M10Q9L - Footprint:
Diode_SMD:D_MELF - 3D model: MELF (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: RESI datasheet (2 pp, sha256
437b63b543482eb5, retrieved 2026-10-16, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins, primarytwo-terminal convention(convention), consensusoff(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).