Honeywell Inc. Residential Div · Electronic Components
AT40A1121
Transformer, Power
Part NumberAT40A1121
ManufacturerHoneywell Inc. Residential Div
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-01-587-3951 (NSN)
Federal Item NameTRANSFORMER,POWER
Federal Supply Class5950 — Coils and Transformers
Overall Length2.188 INCHES NOMINAL
Winding Operating Voltage24.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE SECONDARY
Inclosure TypeOPEN
Mounting MethodFOOT SINGLE GROUP
Overall Height2.094 INCHES NOMINAL
Frequency Rating50.0 HERTZ NOMINAL OR 60.0 HERTZ NOMINAL SINGLE COMPONENT
Overall Width2.625 INCHES NOMINAL
Input Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Terminal Type And Quantity4 WIRE LEAD
Reliability IndicatorNOT ESTABLISHED
Winding Operating Current1.7 AMPERES AC NOMINAL SINGLE COMPONENT SINGLE SECONDARY
Vendor Part NumbersC455112-01
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 AT40A1121 available?
We can source AT40A1121 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 AT40A1121 by Honeywell Inc. Residential Div obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If AT40A1121 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 AT40A1121?
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 AT40A1121?
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.