MIL-SPEC · Electronic Components
RTH42ES220K
Resistor, Thermal
Part NumberRTH42ES220K
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-01-071-7334 (NSN)
Federal Item NameRESISTOR,THERMAL
Federal Supply Class5905 — Resistors
Maximum Operating Temp125.0 CELSIUS
Maximum Power Dissipation Rating0.25 WATTS
Power Dissipation Constant In Mill2.5
Thermal Time Constant In Seconds60.0
Terminal Diameter0.020 INCHES NOMINAL
Zero Power Resistance At Specified34.0 OHMS FIFTH RESISTANCE-TEMPERATURE POINT
Resistance Tolerance At A Specifie-14.0 TO 14.0 SECOND RESISTANCE-TEMPERATURE POINT
Temp Points For Resistance Reading-15.0 CELSIUS SECOND RESISTANCE-TEMPERATURE POINT
Reference Temp In Deg Celsius25.0
Test Data Document81349-MIL-T-23648/19 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE
Style DesignatorROD
ESD/EMICode B — 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 RTH42ES220K available?
We can source RTH42ES220K 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 RTH42ES220K by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If RTH42ES220K 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 RTH42ES220K?
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 RTH42ES220K?
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.