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OR-3120S-TA1
Public Made by Adomby adom
Orient Transistor, Photovoltaic Output Optoisolators, SOP-8. Pinout cross-checked by two models against the datasheet, 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
markdownOR-3120S-TA1
Orient · Transistor, Photovoltaic Output Optoisolators · SOP-8
OR-3120S-TA1 from Orient, in a SOP-8. 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 | N/C | unconnected | No connect; the datasheet's SWITCHING note says pins 1 and 4 need to be connected to LED common. |
| 2 | ANODE | input | LED anode; input forward voltage is 1.5 V typ at IF = 10 mA, average forward current is 25 mA max and reverse voltage is 5 V max. |
| 3 | CATHODE | input | LED cathode; the return for the input LED. |
| 4 | N/C | unconnected | No connect; the datasheet's SWITCHING note says pins 1 and 4 need to be connected to LED common. |
| 5 | VEE | power_in | Output stage negative supply (ground reference); a 0.1 µF bypass capacitor must be connected between pins 5 and 8. |
| 6 | VO | output | Gate-drive output pin; it is shown internally tied to the output stage with pin 7 and is the low-side drive output (VOL 1.0 V max at IO = 100 mA for OR-3150, 0.5 V max for OR-3120). |
| 7 | VO | output | Gate-drive output pin; it is shown internally tied to the high-side drive stage and is the drive output, with VOH of (VCC-4) V min at IO = -100 mA. |
| 8 | VCC | power_in | Output stage positive supply; operating range is 15 V to 30 V, 35 V absolute maximum, with a 0.1 µF bypass capacitor to pin 5. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | Orient |
| Package | SOP-8 |
| Category | Optoisolators |
| Pins | 8 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Average Forward Input Current | IF | 25 | mA | 3 | |||
| Reverse Input Voltage | VR | 5 | V | 3 | |||
| Output High Peak Output Current (OR-3120) | IOH(PEAK) | 2.5 | A | 3 | |||
| Output Low Peak Output Current (OR-3120) | IOL(PEAK) | 2.5 | A | 3 | |||
| Output Collector Power Dissipation | PO | 250 | mW | 3 | |||
| Total Power Dissipation | PT | 295 | mW | 3 | |||
| Supply Voltage | VCC | 35 | V | 3 | |||
| Insulation Voltage | Viso | 3750 | Vrms | 3 | |||
| Working Temperature | Topr | -40 | 110 | ℃ | 3 | ||
| Storage Temperature | Tstg | -55 | 125 | ℃ | 3 | ||
| Soldering Temperature | Tsol | 260 | ℃ | soldering time 10 seconds (footnote *2) | 3 | ||
| Wide operating VCC range (VCC, VEE) | VCC | 15 | 30 | V | 2 | ||
| Industrial operating temperature range | -40 | 100 | °C | 2 | |||
| High Level Output Current (OR-3120) | IOH | 0.5 | 1.5 | A | VO = (VCC, 4V) | 4 | |
| High Level Output Current (OR-3120) | IOH | 2 | A | VO = (VCC, 15V) | 4 | ||
| Low Level Output Current (OR-3120) | IOL | 0.5 | 2 | A | VO = (VEE + 2.5V) | 4 | |
| Low Level Output Current (OR-3120) | IOL | 2 | A | VO = (VEE + 15V) | 4 | ||
| Low Level Output Voltage (OR-3120) | VOL | 0.1 | 0.5 | V | IO = 100 mA | 4 | |
| High Level Supply Current | ICCH | 2.5 | 5 | mA | Output Open, IF = 7 to 16 mA | 4 | |
| Low Level Supply Current | ICCL | 2.7 | 5 | mA | Output Open,VF = -3.0 to +0.8V | 4 | |
| Threshold Input Current Low to High | IFLH | 2.2 | 5 | mA | IO = 0 mA, VO > 5V | 4 | |
| Threshold Input Voltage High to Low | VFHL | 0.8 | V | 4 | |||
| Input Forward Voltage | VF | 1.2 | 1.5 | 1.8 | V | IF = 10 mA | 4 |
| Input Reverse Breakdown Voltage | BVR | 5 | V | IR = 10 µA | 4 | ||
| UVLO Threshold (turn-on) | VUVLO+ | 11 | 12.3 | 13.5 | V | VO > 5 V, IF = 10 mA | 4 |
| UVLO Threshold (turn-off) | VUVLO- | 9.5 | 10.7 | 12 | V | VO > 5 V, IF = 10 mA | 4 |
| Propagation Delay Time to High Output Level (OR-3120) | tPLH | 0.1 | 0.3 | 0.5 | μs | OR-3120: Rg=10,Cg=10nF, f=10kHz, Duty Cycle=50% | 5 |
| Propagation Delay Time to Low Output Level (OR-3120) | tPHL | 0.1 | 0.3 | 0.5 | μs | OR-3120: Rg=10,Cg=10nF, f=10kHz, Duty Cycle=50% | 5 |
| Pulse Width Distortion | PWD | 0.3 | μs | 5 | |||
| Propagation Delay Difference Between Any Two Parts | PDD (tPHL, tPLH) | -0.35 | 0.35 | μs | 5 | ||
| Output High Level Common Mode Transient Immunity | /CMH/ | 25 | 35 | kV/μs | TA=25°C, IF=10 to 16mA, VCM=1500V, VCC=30V | 5 | |
| Output Low Level Common Mode Transient Immunity | /CML/ | 25 | 35 | kV/μs | TA=25°C, VCM= 1500V, VF=0V,VCC=30V | 5 | |
| Temperature Coefficient of Forward Voltage | ΔVF/ΔTA | -1.6 | mV/°C | IF = 10 mA | 4 | ||
| Input Capacitance | CIN | 70 | pF | f = 1 MHz, VF = 0V | 4 | ||
| UVLO Hysteresis | UVLOHYS | 1.6 | V | 4 | |||
| Rise Time | tr | 0.1 | μs | 5 | |||
| Fall Time | tf | 0.1 | μs | 5 | |||
| UVLO Turn On Delay | tUVLO ON | 0.8 | μs | VO>5V,IF=10mA | 5 | ||
| UVLO Turn Off Delay | tUVLO OFF | 0.6 | μs | VO<5V,IF=10mA | 5 |
CAD (KiCad official)
- Symbol:
OR-3120S-TA1 - Footprint:
Package_SO:SOIC-8_3.9x4.9mm_P1.27mm - 3D model: SOP-8 (KiCad packages3D, STEP)
- 3D model files:
or-3120s-ta1-etched.step/or-3120s-ta1-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);or-3120s-ta1.step/or-3120s-ta1.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: Orient datasheet (19 pp, sha256
c853d3cf9bbedf63, retrieved 2026-10-19, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-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).