Altech · Electronic Components
2DNU4
Circuit Breakers 4A MCB DCHAR 1P+N 277VAC UL508
Part Number2DNU4
ManufacturerAltech
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-01-518-3919 (NSN)
Federal Item NameCIRCUIT BREAKER
Body StyleMULTIPOLE-MULTIPLE ACTUATOR TYPE
Special FeaturesONE POLE NEUTRAL
Maximum Interrupting Capacity Curr4.0 AC SINGLE LOCATION
Operating Voltage Type And Rating277.0 AC SINGLE LOCATION
Pole Quantity2
Maximum Continuous Load Current Ra10.0 AMPERES AC SINGLE LOCATION
Reset MethodMANUAL
Body Height1.380 INCHES NOMINAL
Trip Release MethodMAGNETIC SINGLE LOCATION
Body Length3.600 INCHES NOMINAL
Federal Supply Class5925 — Circuit Breakers
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 2DNU4 available?
We can source 2DNU4 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 2DNU4 by Altech obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 2DNU4 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 2DNU4?
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 2DNU4?
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.