Kidde-Fenwal, LLC · Electronic Components
SM120X
Electronic Module, Standardized
Part NumberSM120X
ManufacturerKidde-Fenwal, LLC
AvailabilityAvailable to order — request a quote
Specifications
NSN5963-01-702-1780 (NSN)
Federal Item NameELECTRONIC MODULE,STANDARDIZED
Federal Supply Class5963 — Electronic Modules
Basic Shape StyleRECTANGULAR OR SQUARE
Operating Ac Frequency In Hertz60.0 NOMINAL SINGLE VOLTAGE
Installation DesignMODULE
Inclosure TypePARTIALLY INCLOSED
Overall Length3.0 INCHES NOMINAL
Overall Height0.75 INCHES NOMINAL
Overall Width1.75 INCHES NOMINAL
Cubic Measure3.9375 CUBIC INCHES
Connection Contact Type And Quanti6 WIRE LEAD TERMINALS EXTERNAL
External Ac Operating Voltage In V120.0 NOMINAL SINGLE VOLTAGE
Type Model DesignationSM120X
Vendor Part Numbers3KN55
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 SM120X available?
We can source SM120X 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 SM120X by Kidde-Fenwal, LLC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If SM120X 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 SM120X?
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 SM120X?
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.