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onsemi FOD817C300 — Optoisolators

FOD817C300 Optoisolator — onsemi 5kV Transistor Output 4-DIP

MPNFOD817C300
Active

onsemi FOD817C300, single-channel DC-input transistor-output optoisolator, 4-DIP through-hole package, 5000Vrms isolation, 200-400% CTR at 5mA, -55°C to 110°C operating range.

$0.5100Ref. price · indicative, final on quote
onsemi FOD817C300 datasheet (PDF)
Packaging4-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

FOD817C300 specifications
ParameterValue
Input typeDC
Output typeTransistor
MountingThrough Hole
Voltage - isolation5000Vrms
Voltage - output70V
Voltage - forward (Vf)1.2V
Current - output (Channel)50mA
Current transfer ratio400% @ 5mA
Current - DC forward (If)50 mA
Operating temperature-55°C~110°C
PackageTube
Case4-DIP (0.300\", 7.62mm)
Channels1
Vce saturation200mV
Rise (Fall time)4µs, 3µs

Product details

Single-channel 5kV transistor optocoupler in 4-DIP

The FOD817C300 is an onsemi single-channel optoisolator with a DC infrared LED input and a phototransistor output, housed in a standard 4-DIP (0.300", 7.62mm) through-hole package. Current transfer ratio (CTR) is specified at 200% minimum and 400% maximum at a forward current of 5mA, giving a predictable gain window for logic-level interface or feedback loop design.

Parametric fit for isolated feedback and signal transfer

Output transistor can handle up to 70V collector-emitter and 50mA continuous current, with a typical Vce(sat) of 200mV at rated drive — sufficient for driving a microcontroller input or a gate driver stage.

Active production — no immediate EOL risk

Sourcing and availability for BOM commitment

The 4-DIP through-hole package (0.300" lead spacing) is a widely stocked form factor, compatible with standard socket or solder-in assembly.

Frequently asked questions

What is the current transfer ratio (CTR) of FOD817C300?

CTR is guaranteed between 200% and 400% at a forward current of 5mA, collector-emitter voltage 5V. This range ensures consistent gain from lot to lot.

What is the direct replacement or equivalent for FOD817C300?

The base product number is FOD817. The 'C' suffix indicates the CTR bin (200-400%). Any FOD817 device with the same CTR bin and package is a functional equivalent. Confirm pin compatibility with your PCB layout.