MIL-SPEC · Electronic Components
M39019/04-258S
Circuit Breaker
Part NumberM39019/04-258S
ManufacturerMIL-SPEC
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-01-444-9784 (NSN)
Federal Item NameCIRCUIT BREAKER
Federal Supply Class5925 — Circuit Breakers
Maximum Interrupting Capacity Curr300.0 AC AND 600.0 DC ALL LOCATIONS
Bushing Length0.332 INCHES MINIMUM AND 0.380 INCHES MAXIMUM
Circuit Protection TypeOVERCURRENT ALL LOCATIONS
Trip Delay Time In Seconds Per Rat0.500 MINIMUM AT 200 PCT AND 9.000 MAXIMUM AT 200 PCT ALL LOCATIONS
Thread Series DesignatorUNEF
Test Data Document81349-MIL-C-39019 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DA
Mounting Facility Type And Quantit1 THREADED BUSHING WITH PANEL SEAL
Mounting Surface To Terminal End D1.950 INCHES NOMINAL
Center To Center Distance Between0.594 INCHES MINIMUM AND 0.653 INCHES MAXIMUM
Thread Quantity Per Inch32
Storage TypeGENERAL PURPOSE WAREHOUSE
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 M39019/04-258S available?
We can source M39019/04-258S 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 M39019/04-258S by MIL-SPEC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If M39019/04-258S 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 M39019/04-258S?
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 M39019/04-258S?
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.