component
LMERW250F4M70Q9L
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.
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Publish 0.1.0
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LMERW250F4M70Q9L
RESI · Chip Resistor - Surface Mount · MELF
LMERW250F4M70Q9L 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 |
|---|---|---|---|---|---|---|---|
| Resistance tolerance (F = ±1%) | -1 | 1 | % | F=±1% | 1 | ||
| Temperature coefficient (Q = ±50ppm) | -50 | 50 | ppm/°C | 1 | |||
| Maximum working voltage (LMERW250) | 250 | V | 1 | ||||
| Maximum overload voltage (LMERW250) | 500 | V | 1 | ||||
| Rated power (LMERW250, 0.25W) | 0.25 | W | Rated at 70°C ambient | 1 | |||
| Operating temperature range | -55 | 125 | °C | 1 |
CAD (KiCad official)
- Symbol:
LMERW250F4M70Q9L - 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).
# LMERW250F4M70Q9L
**RESI** · Chip Resistor - Surface Mount · MELF
LMERW250F4M70Q9L 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 |
|---|---|---|---|---|---|---|---|
| Resistance tolerance (F = ±1%) | | -1 | | 1 | % | F=±1% | 1 |
| Temperature coefficient (Q = ±50ppm) | | -50 | | 50 | ppm/°C | | 1 |
| Maximum working voltage (LMERW250) | | | | 250 | V | | 1 |
| Maximum overload voltage (LMERW250) | | | | 500 | V | | 1 |
| Rated power (LMERW250, 0.25W) | | | | 0.25 | W | Rated at 70°C ambient | 1 |
| Operating temperature range | | -55 | | 125 | °C | | 1 |
## CAD (KiCad official)
- Symbol: `LMERW250F4M70Q9L`
- 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](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590163118518272000) (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`, primary `two-terminal convention` (convention), consensus `off` (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/lmerw250f4m70q9l-datasheet.pdf)