# CMFC503J3800HANT

**FH Guangdong Fenghua Advanced Tech** · NTC Thermistors · 1206

CMFC503J3800HANT from FH Guangdong Fenghua Advanced Tech, in a 1206. 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 | FH Guangdong Fenghua Advanced Tech |
| Package | 1206 |
| Category | Sensors |
| 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 |
|---|---|---|---|---|---|---|---|
| Zero-power resistance R25 tolerance (code J) | R25 | -5 |  | 5 | % | Part-number tolerance code J = ±5.0% | 5 |
| B value tolerance (code H) | B25/50 | -3 |  | 3 | % | Part-number B-value tolerance code H = ±3.0% | 5 |
| Operating temperature range |  | -40 |  | 125 | ℃ |  | 12 |
| R25 change after resistance to soldering heat | R25 | -5 |  | 5 | % | Dip 260±5℃, 10±1 s, 96.5Sn/3.0Ag/0.5Cu | 12 |
| B-constant change after resistance to soldering heat | B25/50 | -2 |  | 2 | % | Dip 260±5℃, 10±1 s, 96.5Sn/3.0Ag/0.5Cu | 12 |
| R25 change after vibration | R25 | -5 |  | 5 | % | 10Hz-55Hz-10Hz, amplitude 1.52mm, 2h per X/Y/Z axis | 13 |
| B-constant change after vibration | B25/50 | -2 |  | 2 | % | 10Hz-55Hz-10Hz, amplitude 1.52mm, 2h per X/Y/Z axis | 13 |
| R25 change after resistance to flexure | R25 | -5 |  | 5 | % | PCB bend 1.0mm (0805, 1206), pressing speed 0.5mm/s, hold 30 s | 13 |
| B-constant change after resistance to flexure | B25/50 | -2 |  | 2 | % | PCB bend 1.0mm (0805, 1206), pressing speed 0.5mm/s, hold 30 s | 13 |
| R25 change after high temperature resistance | R25 | -5 |  | 5 | % | 125±2℃, 1000 h (+24/-0) | 13 |
| B-constant change after high temperature resistance | B25/50 | -2 |  | 2 | % | 125±2℃, 1000 h (+24/-0) | 13 |
| R25 change after low temperature resistance | R25 | -5 |  | 5 | % | -40±2℃, 1000 h (+24/-0) | 14 |
| B-constant change after low temperature resistance | B25/50 | -2 |  | 2 | % | -40±2℃, 1000 h (+24/-0) | 14 |
| R25 change after static humidity | R25 | -5 |  | 5 | % | 90-95% RH, 60±2℃, 1000 h (+24/-0) | 14 |
| B-constant change after static humidity | B25/50 | -2 |  | 2 | % | 90-95% RH, 60±2℃, 1000 h (+24/-0) | 14 |
| R25 change after thermal shock | R25 | -5 |  | 5 | % | 32 cycles without load, -40℃ / +125℃, 30 min dwell | 14 |
| B-constant change after thermal shock | B25/50 | -2 |  | 2 | % | 32 cycles without load, -40℃ / +125℃, 30 min dwell | 14 |
| Zero-power resistance R25 (nominal) | R25 |  | 50 |  | KΩ | At 25°C, zero-power | 9 |
| B value constant B25/50 (nominal) | B25/50 |  | 3800 |  | K | B25/50 | 9 |

## Materials and finish

As the datasheet states them (page.json `metadata.appearance`; the 3D model's colours follow it).

| Part | Material | Colour / plating | Datasheet says | Page |
|---|---|---|---|---|
| contacts |  | silver | Terminal electrode 银层 Ag laye 银Ag | 4 |

## CAD (KiCad official)

- Symbol: `CMFC503J3800HANT`
- Footprint: `Resistor_SMD:R_1206_3216Metric`
- 3D model: 1206 (KiCad packages3D, STEP)
- 3D model files: `cmfc503j3800hant-etched.step` / `cmfc503j3800hant-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `cmfc503j3800hant.step` / `cmfc503j3800hant.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [FH Guangdong Fenghua Advanced Tech datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588930459539812352) (19 pp, sha256 `f6d73fcb850cb0cd`, retrieved 2026-10-18, 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/cmfc503j3800hant-datasheet.pdf)