Fairchild Optoelectronics Group · Transistors / FETs
4N25M
Transistor Output Optocouplers Optocoupler (white) Phototransistor
Part Number4N25M
ManufacturerFairchild Optoelectronics Group
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-01-658-6531 (NSN)
Federal Item NameTRANSISTOR
Mounting MethodPRESS FIT
Overall Length8.89 MILLIMETERS NOMINAL
Overall Width6.60 MILLIMETERS NOMINAL
Overall Height5.08 MILLIMETERS NOMINAL
Special FeaturesOP TEMP:-55 TO 150 DEG C
Semiconductor MaterialGALLIUM ARSENIDE
Voltage Rating In Volts Per Charac70.0 NOMINAL BASE SUPPLY VOLTAGE
Federal Supply Class5961 — Semiconductor Devices And Associated Hardware
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 4N25M available?
We can source 4N25M 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 4N25M by Fairchild Optoelectronics Group obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 4N25M 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 4N25M?
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 4N25M?
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.