# X2B026000B91H-HZ

**HELE Harmony Elec** · Crystals · SMD2520-4P

X2B026000B91H-HZ from HELE Harmony Elec, in a SMD2520-4P. 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 | XTAL1 | passive | Crystal terminal (chamfered index pad), connected to one electrode of the 26.000MHz fundamental-mode blank, CL 9.0pF, ESR 60 ohms max, drive level 100uW max. |
| 2 | NC | unconnected | Corner pad with no internal connection to the crystal blank shown in the drawing; used for mechanical soldering to the land pattern. |
| 3 | XTAL2 | passive | Crystal terminal, connected to the second electrode of the 26.000MHz fundamental-mode blank, CL 9.0pF, ESR 60 ohms max, drive level 100uW max. |
| 4 | NC | unconnected | Corner pad with no internal connection to the crystal blank shown in the drawing; used for mechanical soldering to the land pattern. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | HELE Harmony Elec |
| Package | SMD2520-4P |
| 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 |
|---|---|---|---|---|---|---|---|
| Frequency tolerance |  | -10 |  | 10 | ppm | at 25 deg.C +/-3 deg.C | 3 |
| Temperature drift |  | -10 |  | 10 | ppm | -30 deg.C To +85 deg.C | 3 |
| Aging |  | -3 |  | 3 | ppm/Year |  | 3 |
| Nominal frequency |  |  | 26 |  | MHz |  | 3 |
| Equivalent resistance |  |  |  | 60 | ohms | SERIES | 3 |
| Load capacitance (CL) | CL |  | 9 |  | pF |  | 3 |
| Shunt capacitance |  |  |  | 2 | pF |  | 3 |
| Drive level |  |  | 10 | 100 | uW | printed as 10 μW (100uW Max.) | 3 |
| Insulation resistance |  | 500 |  |  | M ohms | at DC 100V | 3 |
| Operable temperature range |  | -30 |  | 85 | deg.C |  | 3 |
| Storage temperature range |  | -40 |  | 85 | deg.C | storage | 3 |
| Frequency variation after shock |  | -5 |  | 5 | ppm | after dropping from 120 cm height 3 times on concrete floor | 3 |
| Resistance change after shock |  | -15 |  | 15 | % | after dropping from 120 cm height 3 times on concrete floor; or 2 ohms max | 3 |
| Frequency variation after environmental tests (code A) |  | -5 |  | 5 | ppm | after humidity, low/high temperature storage, temperature cycles | 11 |
| Equivalent resistance change after environmental tests (code A) |  | -15 |  | 15 | % | after humidity, low/high temperature storage, temperature cycles; or 2 ohms max | 11 |
| Reflow preheat temperature |  | 160 |  | 180 | deg.C | preheat 120 sec | 12 |
| Reflow peak temperature |  |  |  | 260 | deg.C | peak 10 sec max | 12 |
| Soldering iron bit temperature |  |  |  | 350 | deg.C | 3 sec max | 12 |
| Storage temperature (packed reel) |  |  |  | 40 | deg.C | storage condition, reel | 7 |
| Storage relative humidity (packed reel) |  |  |  | 80 | % | storage condition, reel | 7 |

## CAD (KiCad official)

- Symbol: `X2B026000B91H-HZ`
- Footprint: `Crystal:Crystal_SMD_2520-4Pin_2.5x2.0mm`
- 3D model: SMD2520-4P (KiCad packages3D, STEP)
- 3D model files: `x2b026000b91h-hz-etched.step` / `x2b026000b91h-hz-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `x2b026000b91h-hz.step` / `x2b026000b91h-hz.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [HELE Harmony Elec datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8586197305787887616) (16 pp, sha256 `1dc17983390b833d`, retrieved 2026-10-15, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/x2b026000b91h-hz-datasheet.pdf)