Kay Elemetrics · Electronic Components
K157
TRANSISTOR — NSN 5961-00-057-5641
Part NumberK157
ManufacturerKay Elemetrics
AvailabilityAvailable to order — request a quote
Specifications
NSN5961-00-057-5641 (NSN)
Federal Item NameTRANSISTOR
Federal Supply Class5961 — Semiconductor Devices And Associated Hardware
Current Rating200.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC200.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
Terminals3 UNINSULATED WIRE LEAD3 UNINSULATED WIRE LEAD
Mounting MethodTERMINALTERMINAL
Overall Length0.188 INCHES NOMINAL0.188 INCHES NOMINAL
Overall Diameter0.220 INCHES NOMINAL0.220 INCHES NOMINAL
Voltage Rating In Volts Per Charac30.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 30.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, E
Power Rating Per Characteristic300.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION300.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
Maximum Operating Temp Per Measure200.0 CELSIUS JUNCTION200.0 CELSIUS JUNCTION
Electrode Internally ElectricallyCOLLECTORCOLLECTOR
Keyway Width0.190 INCHES NOMINAL SINGLE END
Shaft Rotation DirectionCLOCKWISE SINGLE END
Length Of Shaft From Housing1.970 INCHES SINGLE END
Keyway Depth0.190 INCHES NOMINAL SINGLE END
Shaft End StyleFLAT KEYWAY FIRST END
Keyway Length1.250 INCHES NOMINAL SINGLE END
Shaft Diameter0.6245 INCHES MINIMUM AND 0.625 INCHES MAXIMUM SINGLE END
FSC Application DataPUMP CTFGL
Overall Width6.500 INCHES
Vendor Part NumbersM3537
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 K157 available?
We can source K157 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 K157 by Kay Elemetrics obsolete or end-of-life?
We specialize in obsolete, end-of-life, and discontinued components. If K157 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 K157?
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 K157?
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.