American Precision Industries, Inc. · Electronic Components
SB673-21
Synchro, Control Transformer
Part NumberSB673-21
ManufacturerAmerican Precision Industries, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5990-00-121-2134 (NSN)
Federal Item NameSYNCHRO,CONTROL TRANSFORMER
Federal Supply Class5990 — Synchros and Resolvers
Maximum Total Null Voltage Output70.00
Actuator Friction Torque At Minus6.0 CENTIMETER-GRAMS NOMINAL
Stator Input Electrical Power Rati200.0 MILLIWATTS NOMINAL
Plus J Zro Reactance In Ohms625.00 NOMINAL
Plus J Zrs Reactance In Ohms65.00 NOMINAL
Rotor Dc Resistance In Ohms225.00 NOMINAL
MaterialSTEEL CORROSION RESISTING BODY
Phase Shift Angle In Deg4.000 INPUT TO OUTPUT NOMINAL
Terminal Type And Quantity5 WIRE LEAD
Electrical Error Angular Range In-7.0 TO 7.0
Shaft Slot Width0.0200 INCHES NOMINAL SINGLE SHAFT
Vendor Part Numbers8CT-101-A-5
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 SB673-21 available?
We can source SB673-21 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 SB673-21 by American Precision Industries, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If SB673-21 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 SB673-21?
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 SB673-21?
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.