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AC817-40Q-7

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Diodes Incorporated Bipolar (BJT), SOT-23-3. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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AC817-40Q-7

Diodes Incorporated · Bipolar (BJT) · SOT-23-3

AC817-40Q-7 from Diodes Incorporated, in a SOT-23-3. 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 B input Base; drive terminal of the NPN transistor, with VEBO max 5.0V and peak base current IBM max 200mA.
2 E passive Emitter; connected to the most negative node, with VEBO max 5.0V.
3 C passive Collector; VCEO 45V and VCBO 50V max, with continuous current IC 0.5A and peak ICM 1.0A.

Key specifications

Parameter Value
Manufacturer Diodes Incorporated
Package SOT-23-3
Category Transistors/Thyristors
Pins 3

Electrical characteristics

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

Parameter Symbol Min Typ Max Unit Conditions Page
Collector-Base Voltage VCBO 50 V TA = +25°C 2
Collector-Emitter Voltage VCEO 45 V TA = +25°C 2
Emitter-Base Voltage VEBO 5 V TA = +25°C 2
Collector Current IC 0.5 A TA = +25°C 2
Peak Collector Current ICM 1 A TA = +25°C 2
Peak Base Current IBM 200 mA TA = +25°C 2
Power Dissipation PD 310 mW Note 6: minimum recommended pad layout, TA = +25°C 2
Power Dissipation PD 350 mW Note 7: 15mm x 15mm 1oz copper, TA = +25°C 2
Thermal Resistance, Junction to Ambient RθJA 403 °C/W Note 6: minimum recommended pad layout 2
Thermal Resistance, Junction to Ambient RθJA 357 °C/W Note 7: 15mm x 15mm 1oz copper 2
Thermal Resistance, Junction to Leads RθJL 350 °C/W Note 8 2
Operating and Storage Temperature Range TJ, TSTG -65 150 °C 2
ESD Human Body Model ESD HBM 8000 V JEDEC Class 3B 2
ESD Machine Model ESD MM 400 V JEDEC Class C 2
Collector-Base Breakdown Voltage BVCBO 50 V IC = 100µA 4
Collector-Emitter Breakdown Voltage BVCEO 45 V IC = 10mA 4
Emitter-Base Breakdown Voltage BVEBO 5 V IC = 100µA 4
Collector-Emitter Cut-Off Current ICES 100 nA VCE = 45V 4
Collector-Emitter Cut-Off Current ICES 5 µA VCE = 25V, TJ = +150°C 4
Emitter-Base Cut-Off Current IEBO 100 nA VEB = 5.0V 4
DC Current Gain hFE 250 600 VCE = 1.0V, IC = 100mA 4
DC Current Gain hFE 170 VCE = 1.0V, IC = 300mA 4
Collector-Emitter Saturation Voltage VCE(SAT) 0.7 V IC = 500mA, IB = 50mA 4
Base-Emitter Voltage VBE 1.2 V VCE = 1.0V, IC = 300mA 4
Gain Bandwidth Product fT 100 MHz VCE = 5.0V, IC = 10mA, f = 50MHz 4
Collector-Base Capacitance CCBO 12 pF VCB = 10V, f = 1.0MHz 4

Materials and finish

As the datasheet states them (page.json metadata.appearance; the 3D model's colours follow it).

Part Material Colour / plating Datasheet says Page
contacts tin  Terminals: Finish, Matte Tin Plated Leads, Solderable per MIL￾STD-202, Method 208  Weight: 0.008 grams (Approximate) 1

CAD (KiCad official)

  • Symbol: AC817-40Q-7
  • Footprint: Package_TO_SOT_SMD:SOT-23-3
  • 3D model: SOT-23-3 (KiCad packages3D, STEP)
  • 3D model files: ac817-40q-7-etched.step / ac817-40q-7-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ac817-40q-7.step / ac817-40q-7.glb are the bare package body.

Provenance

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

  • Datasheet: Diodes Incorporated datasheet (7 pp, sha256 e39ef6689a58bf1e, retrieved 2026-10-23, tier: manufacturer)
  • 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