Hamilton Sundstrand Corporation · Electronic Components
74949
Brush, Electrical Contact
Part Number74949
ManufacturerHamilton Sundstrand Corporation
AvailabilityAvailable to order — request a quote
Specifications
NSN5977-00-483-7021 (NSN)
Federal Item NameBRUSH,ELECTRICAL CONTACT
Federal Supply Class5977 — Electrical Contact Brushes and Electrodes
Beam Thickness0.020 INCHES NOMINAL
Mounting Portion Length0.750 INCHES NOMINAL
Cantilever Length0.625 INCHES NOMINAL
Style DesignatorSINGLE BEAM CANTILEVER
Body StyleANGULAR FORMED STRIP
Beam Width0.188 INCHES NOMINAL
MaterialCOPPER ALLOY
Cancelled NSN1610-00-443-0553 (cancelled)
Main Contact Load Current Rating A25.0 AMPERES DC RESISTIVE LOAD
Overall Length4.500 INCHES NOMINAL
Duty TypeINTERMITTENT
Main Contact Maximum Voltage Ratin70.0 DC
Winding Dc Resistance Rating1.125 KILOHMS MINIMUM AND 1.375 KILOHMS MAXIMUM SINGLE WINDING
Nominal Operating Current Rating A56.0 MILLIAMPERES DC SINGLE WINDING
Overall Height4.620 INCHES NOMINAL
Winding Quantity1
Overall Width4.000 INCHES NOMINAL
Operating Voltage Rating And Type70.0 VOLTS DC 25 DEG CELSIUS SINGLE WINDING
Coil Quantity1
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 74949 available?
We can source 74949 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 74949 by Hamilton Sundstrand Corporation obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 74949 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 74949?
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 74949?
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.