# SMM02040D1004DB300

**Vishay Intertech** · Chip Resistor - Surface Mount · MELF-0204

SMM02040D1004DB300 from Vishay Intertech, in a MELF-0204. 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 | Vishay Intertech |
| Package | MELF-0204 |
| 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 |
|---|---|---|---|---|---|---|---|
| Nominal resistance (decoded from MPN code 1004) | R |  | 1 |  | MΩ |  | 2 |
| Resistance tolerance (MPN code D) |  | -0.5 |  | 0.5 | % |  | 2 |
| Temperature coefficient (MPN code D) | TCR | -25 |  | 25 | ppm/K | At (20 / -55 / 20) °C and (20 / 125 / 20) °C | 9 |
| Operating voltage Umax (AC RMS/DC) | Umax |  |  | 200 | V | AC RMS / DC | 1 |
| Rated dissipation P70 | P70 |  |  | 0.4 | W | Power operation mode; ambient 70 °C | 1 |
| Operating temperature range |  | -55 |  | 155 | °C | Power operation mode | 1 |
| Permissible film temperature F max | F max |  |  | 155 | °C | Power operation mode | 1 |
| Permissible voltage against ambient (insulation) Uins | Uins |  |  | 300 | V | 1 min | 1 |
| Max resistance change /ΔR/R/ after 1000 h at P70 | /ΔR/R/ |  |  | 0.25 | % | Power operation mode; P70; R 0.22 Ω to 10 MΩ; 1000 h | 2 |
| Max resistance change /ΔR/R/ after 8000 h at P70 | /ΔR/R/ |  |  | 0.5 | % | Power operation mode; P70; R 0.22 Ω to 10 MΩ; 8000 h | 2 |
| Endurance at 70 °C permissible change, 1000 h | ΔR | -0.25 |  | 0.25 | % R | Power operation mode; U = Umax; 1.5 h on / 0.5 h off; 70 °C; 1000 h; permissible change ±(0.25 % R + 0.01 Ω) as printed | 9 |
| Endurance at 70 °C permissible change, 8000 h | ΔR | -0.5 |  | 0.5 | % R | Power operation mode; U = Umax; 1.5 h on / 0.5 h off; 70 °C; 8000 h; permissible change ±(0.5 % R + 0.01 Ω) as printed | 9 |

## CAD (KiCad official)

- Symbol: `SMM02040D1004DB300`
- Footprint: `Resistor_SMD:R_MiniMELF_MMA-0204`
- 3D model: MELF-0204 (KiCad packages3D, STEP)

## Provenance

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

- **Datasheet:** [Vishay Intertech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8557654257911824384) (13 pp, sha256 `4361e72873d00a5e`, retrieved 2026-10-15, tier: lcsc)
- **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/smm02040d1004db300-datasheet.pdf)