Fairchild · Electronic Components
MMBT3904
Trans GP BJT NPN 40V 0.2A 200mW 3-Pin SOT-23
Part NumberMMBT3904
ManufacturerFairchild
AvailabilityIn stock — ships fast
Specifications
NSN5961-01-633-4855 (NSN)
Federal Item NameTRANSISTOR
Mounting MethodPRESS FIT
Overall Length3.10 MILLIMETERS NOMINAL
Overall Width1.43 MILLIMETERS NOMINAL
Mounting Facility Quantity3
Internal Junction ConfigurationNPN
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 MMBT3904 in stock?
Yes — MMBT3904 is in our stock database. Request a quote for current pricing and lead time.
Is MMBT3904 by Fairchild obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If MMBT3904 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 MMBT3904?
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 MMBT3904?
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.