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onsemi FOD817D300 — Optoisolators

FOD817D300 onsemi Optoisolator, 5000Vrms, 4-DIP, Active

MPNFOD817D300
Active

onsemi FOD817D300, single-channel DC-input transistor-output optoisolator, 5000Vrms isolation, 4-DIP (0.300", 7.62mm) through-hole package, CTR 300–600% at 5 mA, -55°C to 110°C operating range.

$0.5700Ref. price · indicative, final on quote
onsemi FOD817D300 datasheet (PDF)
Packaging4-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

FOD817D300 specifications
ParameterValue
Input typeDC
Output typeTransistor
MountingThrough Hole
Voltage - isolation5000Vrms
Voltage - output70V
Voltage - forward (Vf)1.2V
Current - output (Channel)50mA
Current transfer ratio600% @ 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

Isolation rating and what it buys the design

The FOD817D300 delivers 5000Vrms isolation between input and output — enough for reinforced insulation in mains-referenced circuits like switch-mode PSU feedback loops, motor-drive IGBT gate drive interfaces, and PLC digital input modules where safety isolation is a regulatory requirement.

CTR bin D — LED drive margin for the BOM

This 'D' suffix bin specifies a current transfer ratio of 300% minimum and 600% maximum at If=5 mA. Compared to the FOD817A (80–160%) or FOD817C (200–400%) bins, the D bin gives you headroom to use a lower-cost, lower-efficiency LED or to reduce the forward current and still guarantee the output transistor saturates — useful when the input-side supply is tight.

Temperature range and package for assembly planning

The 4-DIP through-hole package (0.300" body width) is wave-solder friendly and easy to hand-rework — no fine-pitch stencil needed.

The base product number FOD817 is a long-running onsemi family, so supply continuity is stable.

Frequently asked questions

Is FOD817D300 a direct replacement for FOD817A300W or FOD817C300W?

All three share the same package (4-DIP), isolation (5000Vrms), and switching speed (4µs rise, 3µs fall). The difference is the CTR bin: FOD817A300W is 80–160%, FOD817C300W is 200–400%, and FOD817D300 is 300–600%. If your design was validated with the A or C bin, the D bin will work as long as the higher maximum CTR does not cause saturation issues at the minimum LED current — check your worst-case CTR margin.