Hoyt Electrical Instrument Works, Inc. · Electronic Components
B3121
Ammeter — Test Instruments
Part NumberB3121
ManufacturerHoyt Electrical Instrument Works, Inc.
AvailabilityAvailable to order — request a quote
Specifications
NSN6625-00-903-7840 (NSN)
Federal Item NameAMMETER
Federal Supply Class6625 — Test Instruments
Movement Suspension MethodJEWEL PIVOT BASE
Power SourceEXTERNAL
Features ProvidedMAGNETIC SHIELD AND ZERO ADJUSTER
Mounting Facility Type And Quantit4 THREADED STUD(S)
Center To Center Distance Between1.875 INCHES NOMINAL
Measurement Range+0.0 TO 5.0 AMPERES, DC SINGLE INDICATOR SINGLE RANGE
Pointer ColorBLACK SINGLE INDICATOR SINGLE RANGE
Circuit Construction TypeNONELECTRONIC
FSC Application DataTEST SET,ELECT. EQUIP.
Sensitivity Rating5.0 VOLTS
Mounting Stud Length0.461 INCHES NOMINAL
Vendor Part Numbers02-268779
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 B3121 available?
We can source B3121 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 B3121 by Hoyt Electrical Instrument Works, Inc. obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If B3121 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 B3121?
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 B3121?
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.