L3Harris Maritime Power & Energy Solutions, Inc. · Electronic Components
ETN5251
Tripper, Circuit Breaker
Part NumberETN5251
ManufacturerL3Harris Maritime Power & Energy Solutions, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-00-628-7770 (NSN)
Federal Item NameTRIPPER,CIRCUIT BREAKER
Federal Supply Class5925 — Circuit Breakers
Overall Width4.000 INCHES NOMINAL4.000 INCHES NOMINAL
Trip Release MethodTHERMAL-MAGNETIC ALL LOCATIONS
Trip Delay Time In Seconds Per Rat25.000 NOMINAL AT 600 PCT ALL LOCATIONS
Mounting Facility Type And Quantit6 UNTHREADED HOLE(S)6 UNTHREADED HOLE(S)
Unthreaded Mounting Hole Diameter0.312 INCHES MINIMUM AND 0.312 INCHES MINIMUM AND 0.375 INCHES MAXIMUM0.375 INCHES MAXIMUM
Trip Release CharacteristicINSTANTANEOUS AND TIME DELAY ALL LOCATIONS
Overall Height3.875 INCHES NOMINAL3.875 INCHES NOMINAL
Adjustable Trip Setting Current Ra+450.0 TO 525.0 AC ALL LOCATIONS
Maximum Continuous Load Current Ra75.0 AMPERES AC ALL LOCATIONS
Terminal Type And Quantity6 SCREW
Ultimate Trip Rating Of Continuous105.0 ALL LOCATIONS
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 ETN5251 available?
We can source ETN5251 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 ETN5251 by L3Harris Maritime Power & Energy Solutions, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If ETN5251 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 ETN5251?
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 ETN5251?
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.