STMicroelectronics · Electronic Components
2N3440
TRANSISTOR NPN 300V 1A TO-39
Part Number2N3440
ManufacturerSTMicroelectronics
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-00-460-8821 (NSN)
Additional NSNs5961-00-942-4004
Federal Item NameTRANSISTOR
Current Rating1.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC AND 0.50 AMPERES MAXIMUM BASE CURRENT, DC
Terminals3 UNINSULATED WIRE LEAD
Mounting MethodTERMINAL
Overall Length0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM
Special FeaturesJUNCTION PATTERN ARRANGEMENT: NPN
Voltage Rating In Volts Per Charac300.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 7.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COL
Terminal Circle Diameter0.020 INCHES NOMINAL
Terminal Length1.500 INCHES MINIMUM
Electrode Internally ElectricallyCOLLECTOR
Maximum Operating Temp Per Measure200.0 CELSIUS JUNCTION
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 2N3440 available?
We can source 2N3440 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 2N3440 by STMicroelectronics obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 2N3440 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 2N3440?
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 2N3440?
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.