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onsemi HCPL2731M — Discrete Semiconductors

HCPL2731M onsemi Optoisolator – 5 kV, Darlington, 8-DIP

MPNHCPL2731M
Active

onsemi HCPL2731M dual-channel Darlington optoisolator, 8-DIP through-hole package, 5000 Vrms isolation, 500% minimum current transfer ratio at 1.6 mA input, -40°C to 100°C operating range.

$2.1600Ref. price · indicative, final on quote
onsemi HCPL2731M datasheet (PDF)
Packaging8-DIP (0.300", 7.62mm)
RoHSROHS3 Compliant
Independent supplier — new & surplus stockAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

HCPL2731M specifications
ParameterValue
Input typeDC
Output typeDarlington
MountingThrough Hole
Voltage - isolation5000Vrms
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 ~ 100°C
PackageTube
Case8-DIP (0.300\", 7.62mm)
Channels2

Product details

Dual Darlington optoisolator with 5 kV isolation

The HCPL2731M from onsemi is a dual-channel Darlington-output optoisolator in an 8-DIP through-hole package. It provides 5000 Vrms of galvanic isolation between a DC input and a Darlington transistor output, making it suitable for isolating logic signals in industrial controls, PLC I/O modules, and motor-drive interfaces.

Current transfer ratio and drive requirements

With a minimum current transfer ratio of 500% at 1.6 mA forward current, the Darlington output can sink up to 60 mA per channel while the input LED draws only 1.6 mA typical.

Lifecycle and sourcing status

Frequently asked questions

Is HCPL2731M active or obsolete?

Buyers need to know lifecycle status to avoid redesign or last-time buy decisions.

What is the pinout and package of HCPL2731M?

Design engineers need to verify footprint and pin compatibility for PCB layout.

Where to buy HCPL2731M in stock?

Sourcing buyers need immediate availability to fulfill BOM requirements.

What is the replacement for HCPL2731M?

Maintenance techs need a drop-in substitute if the part is unavailable or obsolete.

HCPL2731M datasheet PDF download?

Engineers and buyers need complete specifications for validation and procurement.

HCPL2731M equivalent cross reference?

Brokers check alternative part numbers for lifecycle and cross-reference verification.