Semtech · Electronic Components
3FF40
3A SUPERFAST RECT
Part Number3FF40
ManufacturerSemtech
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-01-340-2863 (NSN)
Federal Item NameSEMICONDUCTOR DEVICE,DIODE
Current Rating3.40 AMPERES NOMINAL FORWARD CURRENT, AVERAGE
Voltage Rating In Volts Per Charac400.0 NOMINAL WORKING PEAK REVERSE VOLTAGE AND 400.0 NOMINAL REPETITIVE PEAK REVERSE 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 3FF40 available?
We can source 3FF40 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 3FF40 by Semtech obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 3FF40 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 3FF40?
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 3FF40?
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.