APEX · Electronic Components
TW03
HEAT SINK-INSULATOR — NSN 5999-01-508-8446
Part NumberTW03
ManufacturerAPEX
AvailabilityIn stock — ships fast
Specifications
NSN5999-01-508-8446 (NSN)
Federal Item NameHEAT SINK-INSULATOR
Overall Length1.550 INCHES NOMINAL
Overall Width1.050 INCHES NOMINAL
Special FeaturesTHERMAL WASHER FOR 8-PIN T0-3 PACKAGE. DO NOT STORE WASHERS ABOVE 45 DEGRESS CENTIGRADE
Federal Supply Class5999 — Miscellaneous Electrical And Electronic Components
ESD/EMICode A — ESD/EMI sensitive item
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 TW03 in stock?
Yes — TW03 is in our stock database. Request a quote for current pricing and lead time.
Is TW03 by APEX obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If TW03 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 TW03?
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 TW03?
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.