PartsTable
Technical Data Sheet
2N4121 ✓ Verified by PartsTable
· SFP TRANSCEIVER
WHAT YOU NEED TO KNOW
SR = Short Range (multimode, 300m) | LR = Long Range (single-mode, 10km) DOM = Digital Optical Monitoring — most enterprise SFPs support it
MATCH ALL THREE: Speed + Wavelength + Brand compatibility
PRODUCT OVERVIEW

The TRANSISTOR is a the manufacturer industrial component. Key specifications include material: PLASTIC ENCLOSURE, overall_width: 0.165 INCHES MAXIMUM IN, overall_height: 0.185 INCHES MAXIMUM IN, overall_length: 0.205 INCHES MAXIMUM IN, transfer_ratio: 200.0 MAXIMUM STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER, mounting_method: TERMINAL. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-997-1344, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
2N4121
NSN: 5961-00-997-1344
FSC: 5961
CAGE: 80131 — ELECTRONIC INDUSTRIES ASSOCIATION
SPECIFICATIONS
materialPLASTIC ENCLOSURE
overall_width0.165 INCHES MAXIMUM IN
overall_height0.185 INCHES MAXIMUM IN
overall_length0.205 INCHES MAXIMUM IN
transfer_ratio200.0 MAXIMUM STATIC FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER
mounting_methodTERMINAL
terminal_length0.500 INCHES MINIMUM IN
overall_diameter0.210 INCHES MAXIMUM IN
special_featuresJUNCTION PATTERN ARRANGEMENT: PNP
features_providedHERMETICALLY SEALED CASE
internal_configurationJUNCTION CONTACT
semiconductor_materialSILICON
NSN5961-00-997-1344
COMPONENT DIAGRAM
BAIL LATCH 10G SFP+ 850nm · SR (MMF, 300m) DOM: Digital Optical Monitoring TX RX LC DUPLEX 20-PIN EDGE CONNECTOR ~56.5 mm ~13.4mm SFP+ TRANSCEIVER | 10G | 850nm | SR (MMF, 300m) Hot-swappable | LC duplex fiber | DDM/DOM supported TITLE SFP+ XCVR PN 2N4121 MFR OEM TRANSISTOR
KEY FEATURES
SPECIFICATION/STANDARD DATA: 80131-RELEASE5278 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT: 200.0 CELSIUS JUNCTION DEGC
TERMINAL TYPE AND QUANTITY: 3 UNINSULATED WIRE LEAD
TERMINAL LENGTH: 0.400 INCHES MINIMUM IN
FEATURES PROVIDED: HERMETICALLY SEALED CASE
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC: 1.0 MAXIMUM COLLECTOR TO BASE VOLTAGE, DC
TERMINAL CIRCLE DIAMETER: 0.100 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
OVERALL LENGTH0.250 INCHES MAXIMUM IN
SPECIFICATION/STANDARD DATA80131-RELEASE5278 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT200.0 CELSIUS JUNCTION DEGC
TERMINAL TYPE AND QUANTITY3 UNINSULATED WIRE LEAD
TERMINAL LENGTH0.400 INCHES MINIMUM IN
FEATURES PROVIDEDHERMETICALLY SEALED CASE
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC1.0 MAXIMUM COLLECTOR TO BASE VOLTAGE, DC
TERMINAL CIRCLE DIAMETER0.100 INCHES MAXIMUM IN
SEMICONDUCTOR MATERIALSILICON
SPECIAL FEATURESJUNCTION PATTERN ARRANGEMENT: PNP
VERIFIED SUBSTITUTES & CROSS-REFERENCES 9
4901-04-1220Interchangeable
interchangeable cross-reference
interchangeable
2N4122Interchangeable
interchangeable cross-reference
interchangeable
152011Interchangeable
interchangeable cross-reference
interchangeable
263-10-41210Interchangeable
interchangeable cross-reference
interchangeable
263-97-41210Interchangeable
interchangeable cross-reference
interchangeable
2N4121Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2N4121?
2N4121 is a TRANSISTOR.
What parts can replace 2N4121?
There are 9 known substitutes for 2N4121: 4901-04-1220, 2N4122, 152011 and 6 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2N4121?
2N4121 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-997-1344. This indicates validated use in U.S. government and defense supply chains.
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