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onsemi 6N138SDV — Optoisolators

onsemi 6N138SDV Optoisolator, 2500Vrms, 8-SMD Gull Wing

MPN6N138SDV
Obsolete

onsemi 6N138SDV Optoisolator, Darlington with Base output, DC input, 1 Channel, 2500Vrms, 300% CTR min, 8-SMD Gull Wing, Tape & Reel.

onsemi 6N138SDV datasheet (PDF)
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

6N138SDV specifications
ParameterValue
Input typeDC
Output typeDarlington with Base
MountingSurface Mount
Voltage - isolation2500Vrms
Voltage - output7V
Voltage - forward (Vf)1.3V
Current - output (Channel)60mA
Current transfer ratio300% @ 1.6mA
Current - DC forward (If)20 mA
Operating temperature-40°C~85°C
PackageTape & Reel (TR)
Case8-SMD, Gull Wing
Channels1
Turn on (Turn off time)1.5µs, 7µs

Product details

The 6N138SDV is marked Obsolete by onsemi.

8-SMD Gull Wing — board-fit note

Housed in an 8-SMD Gull Wing package (supplier device package 8-SMD), supplied on Tape & Reel. The gull-wing leads are solder-reflow compatible and the 1.27 mm pitch footprint mates with standard SO-8 land patterns.

2500Vrms isolation, 300% CTR floor

Rated for 2500Vrms isolation between input and output — sufficient for basic functional isolation in industrial I/O, PLC digital inputs, and motor-drive feedback paths where the working voltage stays below 300 V peak. The Darlington with Base output delivers a minimum current transfer ratio of 300% at 1.6 mA forward current, meaning the output can sink 60 mA continuous per channel while the input LED draws under 2 mA. Switching is asymmetric: 1.5 µs turn-on, 7 µs turn-off typical — the slower turn-off limits the data rate to about 100 kbit/s in most logic-level applications.

Temperature grade and input drive

Forward voltage is 1.3 V typical at the LED; the maximum continuous forward current is 20 mA.

Frequently asked questions

What is the closest pin-compatible alternative to 6N138SDV?

The 6N138 base part number is a common industry type; several manufacturers offer functionally equivalent Darlington-output optocouplers in the same 8-SMD Gull Wing footprint, but pin compatibility and CTR grade must be verified against the BOM position. Quoted to order against the specific requirement.

What compliance documentation does onsemi provide for 6N138SDV?

The evidence does not list RoHS, REACH, UL, or IEC certification status for this order code. Compliance documentation is typically available from onsemi's product page or through the distributor at RFQ.