component
SS4129
Public Unreviewedby Ray
orisilicon Leakage Protection ICs, SOP-8. Datasheet-verified pinout, KiCad symbol/footprint/3D.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownSS4129
orisilicon · Leakage Protection ICs · SOP-8
SS4129 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 the internal differential amplifier (op-amp). Connects to one end of the external zero-current transformer (ZCT) secondary via the input sensing network. |
| 2 | IN2 | input | Inverting input of the internal differential amplifier (op-amp). Connects to the other end of the external ZCT secondary. The differential input |
| 3 | GND | power_in | Device ground reference (chip substrate ground). |
| 4 | OA | output | Filter and integrator output of the internal op-amp / precision rectifier stage. External RC network at this pin sets the integration time constant for RMS leakage detection. |
| 5 | VTRIG | input | Overvoltage comparator input. When the voltage at this pin exceeds VOVT (typ 1.5 V, range 1.3-1.7 V), the overvoltage protection triggers SCR drive to disconnect the mains. |
| 6 | OSHI | output | High drive-current SCR gate output pin. Sources typ 480 uA (min 400 uA, max 600 uA at 25 C) with OSH = 0.8 V to drive the external SCR gate when a leakage trip is detected. Outputs up to 4 pulses at 30ms:100ms duty cycle when the circuit breaker fails to trip. |
| 7 | OSLI | output | Low drive-current SCR gate output pin. Sources typ 480 uA (min 400 uA, max 600 uA at 25 C) with OSL = 0.8 V, driving a second SCR for redundant/small-current path. Outputs up to 4 pulses at 30ms:100ms duty cycle when the circuit breaker fails to trip. |
| 8 | VS | power_in | Supply pin, internally clamped by a zener/regulator (VS typ 5 V, range 4.7-5.3 V, absolute max 7.2 V). Powered from the AC mains via a dropping resistor and rectifier; typical quiescent current is 190 uA. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | orisilicon |
| Package | SOP-8 |
| Category | Power Management (PMIC) |
| Pins | 8 |
Ordering variants
Same part, different packaging or reel option.
SS4129
CAD (KiCad official)
- Symbol:
SS4129 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: orisilicon datasheet (14 pp, sha256
e810e49bd86984ce, retrieved 2026-08-17, 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:
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).