# B3U-1000P

**Omron Electronics** · Tactile Switches · SMD, 3x2.5mm

B3U-1000P from Omron Electronics, in a SMD, 3x2.5mm. 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 the normally open (1a) contact; closes to terminal 2 when the plunger is pressed. |
| 2 | 2 | passive | Terminal 2 of the normally open (1a) contact. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | Omron Electronics |
| Package | SMD, 3x2.5mm |
| Category | Switches |
| 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 |
|---|---|---|---|---|---|---|---|
| Operating ambient temperature |  | -25 |  | 70 | ℃ | 60%RH以下 (无结冰、无凝露) | 1 |
| Operating ambient humidity |  | 35 |  | 85 | %RH | 5～35℃ | 1 |
| Insulation resistance |  | 100 |  |  | MΩ | DC100V 绝缘电阻计 | 1 |
| Contact resistance |  |  |  | 100 | mΩ | 初始值 | 1 |
| Bounce time (震荡时间) |  |  |  | 5 | ms |  | 1 |
| Shock (冲击) malfunction |  |  |  | 1000 | m/s2 |  | 1 |
| Life (寿命), vertical operation B3U-1000 series |  | 200000 |  |  | 次 | 垂直操作型 (B3U-1000系列) | 1 |
| Operating force (OF) printed tolerance | OF | -0.49 | 1.5 | 0.49 | N | 垂直操作型 (B3U-1000系列), nominal 1.50 N ±0.49 N | 1 |
| Return force (RF) | RF | 0.2 |  |  | N |  | 1 |
| Pretravel (PT) printed tolerance | PT | -0.1 | 0.15 | 0.2 | mm | 垂直操作型 (B3U-1000系列), printed as 0.15 mm +0.2/-0.1 | 1 |

## CAD (KiCad official)

- Symbol: `B3U-1000P`
- Footprint: `Adom_Gen:Omron_Electronics_B3_eb9721`
- 3D model: SMD, 3x2.5mm (KiCad packages3D, STEP)
- 3D model files: `b3u-1000p-etched.step` / `b3u-1000p-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `b3u-1000p.step` / `b3u-1000p.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [Omron Electronics datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8588893394868953088) (4 pp, sha256 `abb75a2524e2457d`, retrieved 2026-11-09, 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:** `ds2sf` (Claude). Every pin and dimension is cited to a datasheet page; it refuses to fabricate.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).

[Datasheet PDF](docs/b3u-1000p-datasheet.pdf)