SOLID STATE · Electronic Components
2N4857
N-Channel Mosfet TO-18
Part Number2N4857
ManufacturerSOLID STATE
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-00-146-0247 (NSN)
Federal Item NameTRANSISTOR
Current Rating50.00 MILLIAMPERES MAXIMUM GATE CURRENT
Terminals3 TAB, SOLDER LUG
Mounting MethodTERMINAL
Overall Length0.190 INCHES MAXIMUM
Overall Diameter0.219 INCHES MAXIMUM
Features ProvidedHERMETICALLY SEALED CASE
Voltage Rating In Volts Per Charac40.0 MAXIMUM BREAKDOWN VOLTAGE, DRAIN-TO-SOURCE, WITH ALL OTHER TERMINALS SHORT-CIRCUITED TO SOURCE AND 40.0 MAXIMUM BRE
Power Rating Per Characteristic360.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
Internal ConfigurationFIELD EFFECT
Semiconductor MaterialSILICON
Federal Supply Class5961 — Semiconductor Devices And Associated Hardware
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 2N4857 available?
We can source 2N4857 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 2N4857 by SOLID STATE obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If 2N4857 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 2N4857?
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 2N4857?
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.