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Technical Data Sheet
2N4431 ✓ 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 overall_length: 0.250 INCHES MINIMUM AND 0.340 INCHES MAXIMUM IN, mounting_method: UNTHREADED HOLE(S), overall_diameter: 0.620 INCHES MAXIMUM IN, special_features: JUNCTION PATTERN ARRANGEMENT: NPN, features_provided: HERMETICALLY SEALED CASE, nominal_thread_size: 0.164 INCHES IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-226-6791, 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
2N4431
NSN: 5961-00-226-6791
FSC: 5961
CAGE: 57962 — STMICROELECTRONICS INC (USA)
SPECIFICATIONS
overall_length0.250 INCHES MINIMUM AND 0.340 INCHES MAXIMUM IN
mounting_methodUNTHREADED HOLE(S)
overall_diameter0.620 INCHES MAXIMUM IN
special_featuresJUNCTION PATTERN ARRANGEMENT: NPN
features_providedHERMETICALLY SEALED CASE
nominal_thread_size0.164 INCHES IN
internal_configurationJUNCTION CONTACT
semiconductor_materialSILICON
thread_series_designatorUNIFIED NATIONAL COARSE (UNC)
mounting_facility_quantity2
terminal_type_and_quantity4 UNINSULATED WIRE LEAD
specification/standard_data80131-RELEASE5388 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
NSN5961-00-226-6791
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 2N4431 MFR OEM TRANSISTOR
KEY FEATURES
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT: 200.0 CELSIUS JUNCTION DEGC
MOUNTING FACILITY QUANTITY: 1
NOMINAL THREAD SIZE: 0.164 INCHES IN
THREAD SERIES DESIGNATOR: UNIFIED NATIONAL COARSE (UNC)
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC: 55.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 3.5 MAXIMUM EMITTER TO BASE VOLTAGE, STATIC, COLLECTOR OPEN AND 40.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN
POWER RATING PER CHARACTERISTIC: 18.0 WATTS MAXIMUM COLLECTOR POWER DISSIPATION
FEATURES PROVIDED: HERMETICALLY SEALED CASE
CURRENT RATING PER CHARACTERISTIC: 2.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
TECHNICAL CHARACTERISTICS (FLIS)
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT200.0 CELSIUS JUNCTION DEGC
MOUNTING FACILITY QUANTITY1
NOMINAL THREAD SIZE0.164 INCHES IN
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC55.0 MAXIMUM COLLECTOR TO BASE VOLTAGE/STATIC/EMITTER OPEN AND 3.5 MAXIMUM EMITTER TO BASE VOLTAGE, STATIC, COLLECTOR OPEN AND 40.0 MAXIMUM COLLECTOR TO EMITTER VOLTAGE/STATIC/BASE OPEN
POWER RATING PER CHARACTERISTIC18.0 WATTS MAXIMUM COLLECTOR POWER DISSIPATION
FEATURES PROVIDEDHERMETICALLY SEALED CASE
CURRENT RATING PER CHARACTERISTIC2.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
MOUNTING METHODTHREADED STUD(S)
TERMINAL TYPE AND QUANTITY4 RIBBON
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
RELEASE5388Interchangeable
interchangeable cross-reference
interchangeable
912479-4Interchangeable
interchangeable cross-reference
interchangeable
2N4431Interchangeable
interchangeable cross-reference
interchangeable
2N4431-101Interchangeable
Same NIIN cross-reference
interchangeable
111195-001Interchangeable
Same NIIN cross-reference
interchangeable
SES551Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2N4431?
2N4431 is a TRANSISTOR.
What parts can replace 2N4431?
There are 6 known substitutes for 2N4431: RELEASE5388, 912479-4, 2N4431 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2N4431?
2N4431 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-226-6791. This indicates validated use in U.S. government and defense supply chains.
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