# CH481U00TB05501800

**COSEMITECH** · Hall Switches · TO-92S

CH481U00TB05501800 from COSEMITECH, in a TO-92S. 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 | VDD | power_in | Supply voltage pin; the on-board regulator allows operation from 2.8 V to 28 V, and the device withstands reverse battery down to -24 V. |
| 2 | GND | power_in | Ground pin; the device is protected if VCC and GND are reversed, up to -24 V. |
| 3 | OUT | output | Open-drain NMOS output that must be pulled up through an external resistor, with an output off voltage limit of -0.3 V to 30 V, a sink current limit of 25 mA absolute maximum, and short-circuit protection. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | COSEMITECH |
| Package | TO-92S |
| Category | Magnetic Sensors |
| Pins | 3 |

## Electrical characteristics

Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).

| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Supply Voltage | VCC | 2.8 |  | 28 | V | Operating, TJ < 165°C | 7 |
| Supply Current | ICC | 1 | 1.6 | 4 | mA | No load on VOUT | 7 |
| Supply Zener Clamp Voltage | VZSUPPLY | 29.5 |  |  | V | ICC = 7 mA; TA = 25°C | 7 |
| Output Zener Clamp Voltage | VZOUT | 28.5 |  |  | V | IOUT = 3mA | 7 |
| Reverse Battery Zener | VRCC | -24 |  |  | V |  | 7 |
| Reverse Battery Current | IRCC |  |  | -5 | mA | VCC = -24 V | 7 |
| Power-On Time | tPO |  |  | 30 | μs | TA = 25°C; CLOAD = 10 pF | 7 |
| Output Saturation Voltage | VOUT(sat) |  | 175 | 400 | mV | IOUT = 20 mA | 7 |
| Output Leakage Current | IOFF |  |  | 10 | μA | VOUT = 26 V; Switch state = Off | 7 |
| Output Current Limit | IOUT(lim) | 30 |  | 90 | mA | Short-Circuit Protection, Output = On | 7 |
| Output Rise Time | tr |  |  | 2 | μs | VCC = 12 V, RLOAD = 820 Ω, CLOAD = 10 pF | 7 |
| Output Fall Time (F_time = 00) | tf |  | 0.1 | 2 | μs | F_time = 00, VCC = 12 V, RLOAD = 820 Ω, CLOAD = 10 pF | 7 |
| Pre-Programming Hysteresis BOP - BRP | Bhys_init | 10 | 15 | 20 | G | BOP - BRP, mode=0 | 7 |
| Switch-point Thermal Drift (LT package) | ΔBOP | -0.14 | -0.03 | 0.08 | %/°C | LT package, BOP = ±450 G | 8 |
| Switch-point Thermal Drift (UA package) | ΔBOP | -0.08 | 0 | 0.08 | %/°C | UA package, BOP = ±450 G | 8 |
| BOP Step Size | ResBOP |  | 3 | 6 | G | Bit = LSB of BOPSEL | 8 |
| BHYS Step Size | ResBHYS |  | 3 | 6 | G | Bit = LSB of BRPSEL | 8 |
| Programmable BOP Range | BOP | -10 |  | 450 | G | TA = 25°C, BOPPOL = 0 (minimum at BOPSEL = 0, maximum at BOPSEL = 255), mode=0 | 8 |
| Programmable BRP Range | BHYS | -15 |  | 450 | G | TA = 25°C, BOPPOL = 0 (minimum at BOPSEL = 0, maximum at BOPSEL = 255), mode=0 | 8 |
| Supply Voltage (absolute maximum) | VDD |  |  | 28 | V |  | 5 |
| Supply Voltage (absolute maximum, footnote 1) | VDD |  |  | 30 | V | t < 5 mins, No cumulative stress | 5 |
| VDD Reverse Voltage | VRDD | -24 |  |  | V |  | 5 |
| VDD Reverse Voltage (Pulse) | VRDD(Pulse) | -30 |  |  | V | Tpulse<=2us, Tcycle >= 1s | 5 |
| Supply Current | IDD |  |  | 20 | mA |  | 5 |
| Output off Voltage | VOUT | -0.3 |  | 30 | V |  | 5 |
| Output Current | IOUT |  |  | 25 | mA |  | 5 |
| Operating Ambient Temperature | TA | -40 |  | 150 | °C |  | 5 |
| Storage Temperature | TS | -50 |  | 150 | °C |  | 5 |
| Junction Temperature | TJ | -50 |  | 165 | °C |  | 5 |
| Output pull-up resistor (R1) | R1 | 500 |  |  | Ω | Ensure the output driver can pull OUT close to GND | 11 |

## 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 |  | tin | SOT-89 and TO-92S. Each package type is lead (Pb) free (suffix, -T), with a 100% matte-tin￾plated lead-frame. Revision History | 2 |

## CAD (KiCad official)

- Symbol: `CH481U00TB05501800`
- Footprint: `Package_TO_SOT_THT:TO-92_Inline`
- 3D model: TO-92S (KiCad packages3D, STEP)
- 3D model files: `ch481u00tb05501800-etched.step` / `ch481u00tb05501800-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ch481u00tb05501800.step` / `ch481u00tb05501800.glb` are the bare package body.

## Provenance

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

- **Datasheet:** [COSEMITECH datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603128980614488064) (16 pp, sha256 `62557bc60534a336`, retrieved 2026-10-17, tier: lcsc)
- **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/ch481u00tb05501800-datasheet.pdf)