Fairchild Optoelectronics Group · Transistors / FETs
HMHA281
Transistor Output Optocouplers Optocoupler Phototransistor
Part NumberHMHA281
ManufacturerFairchild Optoelectronics Group
AvailabilityAvailable to order — request a quote
Specifications
NSN5962-01-721-1335 (NSN)
Federal Item NameMICROCIRCUIT,DIGITAL
Terminals4 PIN
Overall Length6.30 MILLIMETERS MINIMUM AND 7.29 MILLIMETERS MAXIMUM
Overall Width2.31 MILLIMETERS MINIMUM AND 2.69 MILLIMETERS MAXIMUM
Overall Height2.39 MILLIMETERS MAXIMUM
Enclosure MaterialSILICON
Features ProvidedROHS DIRECTIVE COMPLIANCE
Special FeaturesLEAD PITCH IS 1.27 MM, GALLIUM ARSENIDE INFRARED EMITTING DIODE DRIVING A SILICON PHOTOTRANSISTOR
Federal Supply Class5962 — Microcircuits, Electronic
RH Electronics, Inc. — independent stocking distributor since 1982.
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Every shipment inspected on receipt · ISO 9001:2015 · ANSI/ESD S20.20 · ERAI member since 1998 · GIDEP participant
Frequently asked
Is HMHA281 available?
We can source HMHA281 even if it isn't in our active stock list. As an independent distributor we reach inventory outside the franchise channel — including hard-to-find and obsolete parts. Send us a quote request.
Is HMHA281 by Fairchild Optoelectronics Group obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If HMHA281 has been discontinued, we can often source remaining stock or qualified alternates. Contact us with your quantity and target date.
How does RH Electronics verify parts like HMHA281?
Every incoming shipment is inspected under our ISO 9001:2015 quality system — documentation, markings, and construction checked against known-good references. For deeper analysis, we direct work through accredited independent labs. We've been an ERAI member since 1998 and a GIDEP participant.
Can you find a cross-reference or alternate for HMHA281?
Yes. Our team reads part numbers the way they were designed — decoding family, speed, temperature grade, package, and reliability level — to identify acceptable alternates when the exact part isn't available. Submit a quote request and we'll advise.