Honeywell · Electronic Components
4LS1
Basic / Snap Action / Limit Switches 1NC 1NO SPDT Side Plunger
Part Number4LS1
ManufacturerHoneywell
AvailabilityAvailable to order — request a quote
Specifications
NSN5930-00-253-4257 (NSN)
Federal Item NameSWITCH,SENSITIVE
Terminals4 SCREW
Mounting MethodUNTHREADED HOLE(S)
Overall Length3.700 INCHES NOMINAL
Overall Width1.570 INCHES NOMINAL
Body StyleHOLE MOUNTED
Center To Center Distance Between2.310 INCHES NOMINAL
Actuator StyleROUND
Switch Actuating Force144.0 OUNCES MAXIMUM
Housing Length3.700 INCHES NOMINAL
Housing Width1.570 INCHES NOMINAL
Federal Supply Class5930 — Switches
Terminal Type And Quantity4 SCREW
Inclosure TypeFULLY INCLOSED
Actuator Free Position Height1.600 INCHES NOMINAL
Vendor Part Numbers3200529-1
Cancelled NSN5930-00-827-2494 (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 4LS1 available?
We can source 4LS1 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 4LS1 by Honeywell obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 4LS1 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 4LS1?
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 4LS1?
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.