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HT-3H4-ATP1

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HENGTUO ELECTRONICS Transistor, Photovoltaic Output Optoisolators, SSOP-4. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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Generated by kicad-footprint-generator · KiCad file format 20260206
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HT-3H4-ATP1

HENGTUO ELECTRONICS · Transistor, Photovoltaic Output Optoisolators · SSOP-4

HT-3H4-ATP1 from HENGTUO ELECTRONICS, in a SSOP-4. 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 Anode input Anode of the input LED pair (antiparallel LEDs, forward current up to ±50 mA, VF 1.2 V typ at IF=±20 mA).
2 Cathode input Cathode of the input LED pair (antiparallel LEDs, reverse voltage max 6 V, forward current up to ±50 mA).
3 Emitter passive Phototransistor emitter; VECO max 7 V, collector current max 50 mA.
4 Collector passive Phototransistor collector; VCEO max 80 V, collector current max 50 mA, collector power dissipation 150 mW.

Key specifications

Parameter Value
Manufacturer HENGTUO ELECTRONICS
Package SSOP-4
Category Optoisolators
Pins 4

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Current Transfer Ratio, rank A CTR 50 150 % IF=±1mA, VCE=5V, Ta=25°C 5
Forward Voltage VF 1.2 1.4 V IF=±20mA 5
Reverse Current IR 10 μA VR=4V 5
Terminal Capacitance Ct 30 250 pF V=0, f=1KHz 5
Collector Dark Current ICEO 100 nA VCE=20V, IF=0 5
Collector-Emitter Breakdown Voltage BVCEO 80 V IC=0.1mA, IF=0 5
Emitter-Collector Breakdown Voltage BVECO 7 V IE=10µA, IF=0 5
Collector-Emitter Saturation Voltage VCE(sat) 0.1 0.2 V IF=±20mA, IC=1mA 5
Floating Capacitance Cf 0.6 1 pF V=0, f=1MHz 5
Cut-off Frequency fc 80 kHz VCE=5V, IC=2mA, RL=100Ω, -3dB 5
Response Time (Rise) tr 4 18 μs VCE=2V, IC=2mA, RL=100Ω 5
Response Time (Fall) tf 3 18 μs VCE=2V, IC=2mA, RL=100Ω 5
Forward Current IF -50 50 mA 4
Reverse Voltage VR 6 V 4
Power Dissipation PD 70 mW 4
Derating factor (power dissipation) 2 mW/°C above Ta = 90°C 4
Collector - Emitter Voltage VCEO 80 V 4
Emitter - Collector Voltage VECO 7 V 4
Collector Current IC 50 mA 4
Collector Power Dissipation PC 150 mW 4
Derating factor (collector power dissipation) 3.1 mW/°C above Ta = 70°C 4
Operating temperature range Top -55 110 °C 4
Storage temperature range Tstg -55 125 °C 4
Total Power consumption P(W) 200 mW 4
Isolation Voltage VISO 3750 Vrms AC for 1 minute, R.H. 40~60%, pins 1,2 shorted; pins 3,4 shorted 4
Soldering Temperature TSOL 260 °C for 10 seconds 4

CAD (KiCad official)

  • Symbol: HT-3H4-ATP1
  • Footprint: Package_SO:SSOP-4_4.4x2.6mm_P1.27mm
  • 3D model: SSOP-4, generated from the KiCad footprint (body from the F.Fab outline, terminals on the pads, 1.75 mm nominal SSOP height). Neither the vendor nor KiCad ships a 3D model for this package, so the dimensions are nominal, not the manufacturer's CAD (STEP)
  • 3D model files: ht-3h4-atp1-etched.step / ht-3h4-atp1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht-3h4-atp1.step / ht-3h4-atp1.glb are the bare package body.

Provenance

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

  • Datasheet: HENGTUO ELECTRONICS datasheet (12 pp, sha256 846d95afcba41053, retrieved 2026-10-21, tier: lcsc)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text+vision), consensus claude-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).

Datasheet PDF