Semiconductor Technology, Inc. · Electronic Components
ST2540
TRANSISTOR — NSN 5961-01-028-2242
Part NumberST2540
ManufacturerSemiconductor Technology, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-01-028-2242 (NSN)
Federal Item NameTRANSISTOR
Federal Supply Class5961 — Semiconductor Devices And Associated Hardware
Current Rating1.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
Terminals1 CASE AND 2 PIN
Mounting MethodUNTHREADED HOLE(S)
Overall Length1.248 INCHES MINIMUM AND 1.252 INCHES MAXIMUM
Overall Width0.700 INCHES NOMINAL
Overall Height0.610 INCHES MINIMUM
Voltage Rating In Volts Per Charac-300.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND -275.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE
Electrode Internally ElectricallyCOLLECTOR
Mounting Facility Quantity2
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 ST2540 available?
We can source ST2540 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 ST2540 by Semiconductor Technology, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If ST2540 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 ST2540?
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 ST2540?
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.