# SS54123H

**orisilicon** · Leakage Protection ICs · SOP-8

SS54123H from orisilicon, in a SOP-8. Pinout and pin descriptions extracted from the manufacturer datasheet by ds2sf; symbol, footprint, and 3D from KiCad-official CAD.

## Pinout

| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | IN1 | input | Non-inverting input of differential amplifier for zero-sequence current detection, connects to toroidal current transformer secondary. |
| 2 | IN2 | input | Inverting input of differential amplifier for zero-sequence current detection, connects to toroidal current transformer secondary. |
| 3 | GND | power_in | Chip ground and reference potential. |
| 4 | OA | output | Amplifier filter output pin providing amplified and band-pass filtered zero-sequence current signal. |
| 5 | DLY | input | Delay adjustment pin for external RC network configuration of leakage protection trigger delay. |
| 6 | OS | output | SCR trigger output providing 1.5V nominal drive to external thyristor for AC power disconnection upon leakage detection. |
| 7 | VS | power_in | Power supply pin accepting 1.5V regulated internal supply voltage. |
| 8 | NC | unconnected | No connection, floating pin. |

## Key specifications

| Parameter | Value |
|---|---|
| Manufacturer | orisilicon |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |

## CAD (KiCad official)

- Symbol: `SS54123H`
- Footprint: `Package_SO:SOIC-8_3.9x4.9mm_P1.27mm`
- 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files: `ss54123h-etched.step` / `ss54123h-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `ss54123h.step` / `ss54123h.glb` are the bare package body.
- Laser-etched variant: `ss54123h-etched.step` / `ss54123h-etched.glb`, the same package body with the MPN marked on the die, in a toggleable `Adom.LaserEtch` group (Fusion-ready).

## Provenance

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

- **Datasheet:** [orisilicon datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8603385985979990016) (10 pp, sha256 `5959d685047f10b7`, retrieved 2026-09-17, 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 0.2`, primary `claude-haiku-4-5-20251001` (text), consensus `claude-sonnet-4-6` (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/ss54123h-datasheet.pdf)