Chromalox · Electronic Components
ARC-540
Switch, Thermostatic
Part NumberARC-540
ManufacturerChromalox
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-608-9312 (NSN)
Federal Item NameSWITCH,THERMOSTATIC
Federal Supply Class5930 — Switches
Bulb Diameter0.250 INCHES NOMINAL
Overall Length5.875 INCHES NOMINAL
Bulb Length4.750 INCHES NOMINAL
Nonpile Up Contact Arrangement2 POLE, SINGLE THROW, NORMALLY CLOSED, MOMENTARY ACTION
Contact AdjustabilityACTUATION POINT ADJUSTABLE
Contact Load Current Rating25.0 AMPERES RESISTIVE LOAD SECOND VOLTAGE
Contact Voltage Rating In Volts240.0 AC AT SEA LEVEL FIRST VOLTAGE
Contact Adjustment TypeINTERNAL ACTUATION POINT KNOB
Contact Adjustment Range+150.00 TO 250.00 ACTUATION POINT DEGREES FAHRENHEIT
Longest Vertical Distance Between2.438 INCHES NOMINAL
Mounting MethodBASE
Vendor Part Numbers580-508-1699095ALTBPC2, 27E5647, RS710PC18, RS710CD1PC3
Cancelled NSN5930-00-657-2249 (cancelled)
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 ARC-540 available?
We can source ARC-540 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 ARC-540 by Chromalox obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If ARC-540 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 ARC-540?
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 ARC-540?
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.