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onsemi 6N139SD — Optoisolators

onsemi 6N139SD Optoisolator, Darlington Output, 2500Vrms

MPN6N139SD
Obsolete

onsemi 6N139SD optoisolator, single-channel, DC input, Darlington with Base output, 2500Vrms isolation, 500% CTR min, 8-SMD Gull Wing package, Tape & Reel.

onsemi 6N139SD datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

6N139SD specifications
ParameterValue
Input typeDC
Output typeDarlington with Base
MountingSurface Mount
Voltage - isolation2500Vrms
Voltage - output18V
Voltage - forward (Vf)1.3V
Current - output (Channel)60mA
Current transfer ratio500% @ 1.6mA
Current - DC forward (If)20 mA
Operating temperature-40°C~85°C
PackageTape & Reel (TR); Cut Tape (CT)
Case8-SMD, Gull Wing
Channels1
Turn on (Turn off time)1.5µs, 7µs

Product details

The 6N139SD: For existing BOM lines, this part is sourced to order through independent distribution — availability and pricing confirmed at RFQ.

Isolation and signal transfer — 2500Vrms with 500% CTR

Rated for 2500Vrms isolation, this optoisolator provides galvanic separation between a DC input and a Darlington output stage — suitable for breaking ground loops in industrial sensor interfaces or PLC digital inputs.

The surface-mount footprint is standard for this class — the gull-wing leads allow visual inspection of solder joints.

Frequently asked questions

Where can I buy 6N139SD and get a price?

Sourced to order through independent distribution. Submit an RFQ for current availability and pricing — no stock-holding claim.

What is the input type and output type of 6N139SD?

DC input with a Darlington with Base output. The Darlington stage provides high current gain — minimum 500% CTR at 1.6 mA.