optoisolators

PC817

Key datasheet specifications and the closest alternatives, ranked by parametric similarity and grounded in the manufacturer datasheet.

01 — Overview

This datasheet covers the PC817, a GaAs/NPN transistor photocoupler with 2.54mm pin pitch. It defines absolute ratings like 6V reverse voltage and 50mA forward current, plus opto-electronic specs including 100-600% CTR at 5mA/5V and typical 6μs rise time. Key applications include switching power supplies, computers, and home appliances. The document details package marking codes, insulation testing methods, and temperature ranges from -55°C to +125°C for storage.

02 — Key specifications

Datasheet parameters

ParameterMinTypMaxConditions
output current — 50 mA —
forward voltage — 1.2 V 1.4 V IF = 20mA
operating temperature -55 °C — 110 °C
power dissipation — — 200 mW
reverse voltage — — 6 V
forward current — 50 mA —
reverse leakage current — — 5 µA VR = 5V
isolation voltage — — 5 kV
rise time — 6 µs 18 µs VCE = 2V, IC = 2mA
fall time — 5 µs 18 µs RL = 100Ω
dark current — 150 nA —
collector emitter voltage — — 35 V
03 — Alternatives

Closest matches to PC817

LTV-354T 1.7× lower fall time, 1.5× lower dark current, 1.5× lower rise time
TLP185GB 15.0× lower dark current, 3.0× lower rise time, 2.0× higher isolation voltage
TCUT1350X01 5.3× lower power dissipation, 3.2× higher fall time, 2.0× lower forward current
MOC3010M 15.0× lower dark current, 2.0× higher output current, 2.0× lower power dissipation
4N35 2.9× lower power dissipation, 1.2× lower operating temperature, 1.1× higher forward voltage
MOC3063S 1.2× higher power dissipation, 1.1× higher operating temperature, similar forward current
LTV-217-G 2.9× lower power dissipation, 2.3× higher collector emitter voltage, 1.3× lower isolation voltage
LTR-323DB 5.0× higher reverse voltage, 5.0× lower dark current, 1.3× lower power dissipation
04 — FAQ

Frequently asked questions

What is the collector-emitter voltage of the PC817?

The collector-emitter voltage is 35 V.

What is the maximum dark current for the PC817?

The dark current is 150 nA.

What is the fall time when RL = 100Ω?

The fall time is 5 µs.

What is the maximum forward current for the PC817?

The maximum forward current is 50 mA.

What is the forward voltage when IF = 20mA?

The forward voltage is 1.2 V.

What is the isolation voltage of the PC817?

The isolation voltage is 5 kV.

What is the maximum operating temperature for the PC817?

The maximum operating temperature is 110 °C.

What is the maximum output current of the PC817?

The maximum output current is 50 mA.

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