STMicroelectronics Inc. · Electronic Components
SD1220
TRANSISTOR — NSN 5961-00-275-2137
Part NumberSD1220
ManufacturerSTMicroelectronics Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-00-275-2137 (NSN)
Federal Item NameTRANSISTOR
Federal Supply Class5961 — Semiconductor Devices And Associated Hardware
Current Rating1.00 AMPERES MAXIMUM COLLECTOR CURRENT, RMS VALUE OF ALTERNATION COMPONENT
Terminals4 UNINSULATED WIRE LEAD AND 1 THREADED STUD
Mounting MethodTHREADED STUD(S)
Overall Length0.750 INCHES MAXIMUM
Overall Diameter0.385 INCHES MAXIMUM
Mounting Facility Quantity1
Transfer Ratio5.0 NOMINAL SMALL-SIGNAL SHORT-CIRCUIT FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC)
Special FeaturesJUNCTION PATTERN ARRANGEMENT: PNP
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 SD1220 available?
We can source SD1220 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 SD1220 by STMicroelectronics Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If SD1220 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 SD1220?
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 SD1220?
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.