# SX3B48.000F1210F30

**Shenzhen SCTF Elec** · Crystals · SMD3225-4P

SX3B48.000F1210F30 from Shenzhen SCTF Elec, in a SMD3225-4P. 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 | NC/XTAL1 | passive | The datasheet text provided does not state the function or limits of pin 1; its position is shown only in the page 4 bottom-view drawing. |
| 2 | COVER (GND or float) | passive | Pin 2 is connected to the metal cover and should be connected to GND or left floating. |
| 3 | NC/XTAL2 | passive | The datasheet text provided does not state the function or limits of pin 3; its position is shown only in the page 4 bottom-view drawing. |
| 4 | COVER (GND or float) | passive | Pin 4 is connected to the metal cover and should be connected to GND or left floating; it is not used as the starting position, and the drawing notes its pad may be missing. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Shenzhen SCTF Elec |
| Package | SMD3225-4P |
| Category | Crystals, Oscillators, Resonators |
| Pins | 4 |

## 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 Frequency | f |  | 48 |  | MHz | Fundamental | 3 |
| Load Capacitance | CL |  | 12 |  | pF |  | 3 |
| Frequency Tolerance | △f/f | -10 |  | 10 | ppm | at 25℃±2℃ | 3 |
| Drive Level | DL |  |  | 100 | μW |  | 3 |
| Shunt Capacitance | C0 |  |  | 3 | pF |  | 3 |
| Effective Resistance | RR |  |  | 30 | Ω |  | 3 |
| Negative Resistance | -R | 150 |  |  | Ω |  | 3 |
| Drive Level Dependency | DLD2 |  |  | -3 | dB | Sweep from 100nW to 100uW in 20 steps | 3 |
| Temperature Drift | f_tem | -30 |  | 30 | ppm | Over Operating Temp. Range (Reference 25℃) | 3 |
| 1st Year Aging | f_age | -3 |  | 3 | ppm | 1st Year Aging | 3 |
| Insulation Resistance | IR | 500 |  |  | MΩ | at DC 100V | 3 |
| Operating Temperature Range | T_use | -40 |  | 85 | ℃ |  | 3 |
| Storage Temperature Range | T_sta | -55 |  | 125 | ℃ |  | 3 |

## CAD (KiCad official)

- Symbol: `SX3B48.000F1210F30`
- Footprint: `Crystal:Crystal_SMD_3225-4Pin_3.2x2.5mm`
- 3D model: SMD3225-4P (KiCad packages3D, STEP)
- 3D model files: `sx3b48-000f1210f30-etched.step` / `sx3b48-000f1210f30-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `sx3b48-000f1210f30.step` / `sx3b48-000f1210f30.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Shenzhen SCTF Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8590197753817948160) (8 pp, sha256 `9d61513b84839f5f`, 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 0.3`, primary `claude-haiku-5-5` (text), consensus `claude-sonnet-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/sx3b48-000f1210f30-datasheet.pdf)