Cooper Bussmann, LLC · Electronic Components
121B30-B2M
Circuit Breaker
Part Number121B30-B2M
ManufacturerCooper Bussmann, LLC
AvailabilityAvailable to order — request a quote
Specifications
NSN5925-01-600-8047 (NSN)
Federal Item NameCIRCUIT BREAKER
Federal Supply Class5925 — Circuit Breakers
Trip Release Ambient Temp Rating-40.0 FAHRENHEIT MINIMUM AND 185.0 FAHRENHEIT MAXIMUM ALL LOCATIONS
Maximum Interrupting Capacity Curr1.5 DC ALL LOCATIONS
Operating Voltage Type And Rating14.0 DC AND 28.0 DC ALL LOCATIONS
Trip Release MethodTHERMAL ALL LOCATIONS
Circuit Protection TypeOVERCURRENT ALL LOCATIONS
Trip Release CharacteristicTIME DELAY ALL LOCATIONS
Nominal Thread Size0.190 INCHES
Body Length1.240 INCHES NOMINAL
Body Width0.790 INCHES NOMINAL
Overall Width0.790 INCHES NOMINAL
Body Height0.640 INCHES NOMINAL
Vendor Part NumbersCB-30A
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 121B30-B2M available?
We can source 121B30-B2M 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 121B30-B2M by Cooper Bussmann, LLC obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 121B30-B2M 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 121B30-B2M?
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 121B30-B2M?
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.