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HT-3H7-CTP1

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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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HT-3H7-CTP1

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

HT-3H7-CTP1 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 LED anode of the input side; forward current IF max 50 mA, VF typ 1.2 V (max 1.4 V) at IF=20 mA.
2 Cathode input LED cathode of the input side; reverse voltage VR max 6 V.
3 Emitter passive Phototransistor emitter; emitter-collector voltage VECO max 7 V.
4 Collector passive Phototransistor collector; collector-emitter voltage VCEO max 80 V and collector current IC max 50 mA.

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 C) CTR 200 400 % IF=5mA, 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
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 mA 4
Reverse voltage VR 6 V 4
Power dissipation PD 70 mW Derating 2.0 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 Derating 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 1 min, R.H. 40-60%, pins 1-2 and 3-4 shorted 4
Soldering temperature TSOL 260 °C 10 s 4
Collector-emitter floating capacitance cut-off frequency fc 80 kHz VCE=5V, IC=2mA, RL=100Ω, -3dB 5

CAD (KiCad official)

  • Symbol: HT-3H7-CTP1
  • 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-3h7-ctp1-etched.step / ht-3h7-ctp1-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ht-3h7-ctp1.step / ht-3h7-ctp1.glb are the bare package body.

Provenance

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

  • Datasheet: HENGTUO ELECTRONICS datasheet (12 pp, sha256 6b4d10d13bc4494a, retrieved 2026-10-19, 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