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onsemi FOD817B300W — Optoisolators

FOD817B300W Optoisolator - onsemi 5kV Transistor Output

MPNFOD817B300W
Active

onsemi FOD817B300W, single-channel DC-input transistor-output optoisolator, 5000Vrms isolation, 130-260% CTR at 5 mA, in a 4-DIP through-hole package, tube.

$0.6200Ref. price · indicative, final on quote
onsemi FOD817B300W datasheet (PDF)
Packaging4-DIP (0.400", 10.16mm)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Aug 2026

Specifications

FOD817B300W specifications
ParameterValue
Input typeDC
Output typeTransistor
MountingThrough Hole
Voltage - isolation5000Vrms
Voltage - output70V
Voltage - forward (Vf)1.2V
Current - output (Channel)50mA
Current transfer ratio260% @ 5mA
Current - DC forward (If)50 mA
Operating temperature-55°C ~ 110°C
PackageTube
Case4-DIP (0.400\", 10.16mm)
Channels1
Vce saturation200mV
Rise (Fall time)4µs, 3µs

Product details

Galvanic isolation for 5 kV working voltage

The FOD817B300W is a single-channel optoisolator from onsemi that provides 5000Vrms isolation between a DC-input LED and a phototransistor output. This isolation rating is the key parameter for safety barriers in AC mains-powered equipment, motor drives, and industrial I/O modules where the controller side must be protected from high-voltage transients on the field side. The 4-DIP through-hole package (0.400-inch lead spacing) is a standard footprint for optocouplers, making it a drop-in fit for many existing PCB layouts designed for the FOD817 family.

CTR bin B and switching speed profile

The B current-transfer-ratio bin guarantees 130% to 260% CTR at a forward current of 5 mA. Within the FOD817 family, the B bin sits between the A bin and the C bin.

Active production, through-hole availability

Frequently asked questions

Is FOD817B300W the same as FOD817B?

The FOD817B300W is a specific ordering code within the FOD817B family. The base part FOD817B shares the same CTR bin (130-260% at 5 mA), isolation voltage, and package outline. The '300W' suffix typically indicates a tube-packaged variant with ROHS3 compliance. Electrically, they are identical.