TE Connectivity · Electronic Components
RKEF400
Resettable Fuse, PPTC, PolySwitch RKEF Series, 60 VDC, 4 A, 8 A, 24 s, Rectangular
Part NumberRKEF400
ManufacturerTE Connectivity
AvailabilityAvailable to order — request a quote
Specifications
Current Rating Max40 A
Automotive Qualification Standard-
Trip Current8 A
Holding Current4 A
RohscompliantYES
Thickness3 mm
Thermistor MountingThrough Hole
Voltage Rating60 VDC
Hazardousfalse
RohsphthalatescompliantYES
Product RangePolySwitch RKEF Series
IscanonicalY
Height24.9 mm
Operating Temperature Max85 °C
NSN5905-01-592-3104 (NSN)
Federal Item NameRESISTOR,THERMAL
Special FeaturesPOLYSWITCH PTC SWITCH
Body Outside Diameter0.830 INCHES MAXIMUM
Maximum Operating Temp85.0 CELSIUS
Body Length0.980 INCHES MAXIMUM
Style DesignatorSEALED OR COATED BEAD
Federal Supply Class5905 — Resistor
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 RKEF400 available?
We can source RKEF400 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 RKEF400 by TE Connectivity obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If RKEF400 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 RKEF400?
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 RKEF400?
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.