Keytronics, Inc. · Electronic Components
M509
Reactor-Transformer
Part NumberM509
ManufacturerKeytronics, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5950-00-900-0658 (NSN)
Federal Item NameREACTOR-TRANSFORMER
Federal Supply Class5950 — Coils and Transformers
Vendor Part NumbersM509A, 517-9000-156
Overall Length4.750 INCHES NOMINAL
Operating Voltage Rating And Type28.0 VOLTS DC 85 DEG CELSIUS ALL WINDINGS
Special Test FeaturesOPERATING TEMPERATURE = (55C) TO 85C
Overall Height2.750 INCHES NOMINAL
Center To Center Distance Between1.970 INCHES NOMINAL FIRST MOUNTING FACILITY
Test Data Document96906-MIL-PRF-6106 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.).
Winding Dc Resistance Rating1.0 OHMS NOMINAL ALL WINDINGS
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 M509 available?
We can source M509 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 M509 by Keytronics, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If M509 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 M509?
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 M509?
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.