Drs Sustainment Systems, Inc. · Electronic Components
ES728
Resistor, Thermal
Part NumberES728
ManufacturerDrs Sustainment Systems, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-00-671-2409 (NSN)
Federal Item NameRESISTOR,THERMAL
Federal Supply Class5905 — Resistors
Thermal Time Constant In Seconds50.0
Terminal Length1.500 INCHES NOMINAL
Maximum Power Dissipation Rating2.50 WATTS
Zero Power Resistance492.000 OHMS
Zero Power Resistance At Specified246.0 OHMS FIRST RESISTANCE-TEMPERATURE POINT
Terminal Type And Quantity2 WIRE LEAD
Reference Temp In Deg Celsius25.0
Style DesignatorWAFER
Inclosure TypeENCAPSULATED
Temp Points For Resistance Reading-21.5 CELSIUS FIRST RESISTANCE-TEMPERATURE POINT
Resistance Tolerance At A Specifie-5.0 TO 5.0 ALL RESISTANCE-TEMPERATURE POINTS
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 ES728 available?
We can source ES728 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 ES728 by Drs Sustainment Systems, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If ES728 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 ES728?
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 ES728?
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.