Raytheon Company · Electronic Components
TM1-4-680
Resistor, Thermal
Part NumberTM1-4-680
ManufacturerRaytheon Company
AvailabilityAvailable to order — request a quote
Specifications
NSN5905-00-843-0819 (NSN)
Federal Item NameRESISTOR,THERMAL
Federal Supply Class5905 — Resistors
Body Outside Diameter0.185 INCHES MINIMUM AND 0.215 INCHES MAXIMUM
Reliability IndicatorNOT ESTABLISHED
Terminal Type And Quantity2 WIRE LEAD
Style DesignatorROD
Power Dissipation Constant In Mill250.0
Terminal Diameter0.025 INCHES NOMINAL
Terminal Length1.375 INCHES MINIMUM AND 1.625 INCHES MAXIMUM
Ambient Temp At Full Rated Power25.0 CELSIUS
Body Length0.570 INCHES MINIMUM AND 0.600 INCHES MAXIMUM
Inclosure TypeENCAPSULATED
Thermal Time Constant In Seconds54.0
Vendor Part NumbersTM1-4-6800HMP0RM10PCT, TM1-4-681K, TM1-4 6800HMSPOR
Cancelled NSN5905-00-893-2505 (cancelled)
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 TM1-4-680 available?
We can source TM1-4-680 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 TM1-4-680 by Raytheon Company obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If TM1-4-680 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 TM1-4-680?
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 TM1-4-680?
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.