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Technical Data Sheet
2N3999 ✓ 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: 1.130 INCHES MAXIMUM IN, mounting_method: THREADED STUD(S), overall_diameter: 0.370 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN, special_features: JUNCTION PATTERN ARRANGEMENT: NPN, features_provided: HERMETICALLY SEALED CASE, nominal_thread_size: 0.190 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 5961-00-433-5729, 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
2N3999
NSN: 5961-00-433-5729
FSC: 5961
CAGE: 01295 — TEXAS INSTRUMENTS INCORPORATED (USA)
SPECIFICATIONS
overall_length1.130 INCHES MAXIMUM IN
mounting_methodTHREADED STUD(S)
overall_diameter0.370 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
special_featuresJUNCTION PATTERN ARRANGEMENT: NPN
features_providedHERMETICALLY SEALED CASE
nominal_thread_size0.190 INCHES IN
internal_configurationJUNCTION CONTACT
semiconductor_materialSILICON
thread_series_designatorUNF
mounting_facility_quantity1
overall_width_across_flats0.424 INCHES MINIMUM AND 0.437 INCHES MAXIMUM IN
terminal_type_and_quantity2 TAB, SOLDER LUG AND 1 WIRE HOOK
NSN5961-00-433-5729
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 2N3999 MFR OEM TRANSISTOR
KEY FEATURES
CURRENT RATING PER CHARACTERISTIC: 5.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC: 100.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 80.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 8.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT: 200.0 CELSIUS JUNCTION DEGC
INTERNAL JUNCTION CONFIGURATION: NPN
INTERNAL CONFIGURATION: JUNCTION CONTACT
TERMINAL TYPE AND QUANTITY: 3 TAB, SOLDER LUG
FEATURES PROVIDED: HERMETICALLY SEALED CASE
ELECTRODE INTERNALLY-ELECTRICALLY CONNECTED TO CASE: COLLECTOR
TECHNICAL CHARACTERISTICS (FLIS)
CURRENT RATING PER CHARACTERISTIC5.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC100.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 80.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 8.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT200.0 CELSIUS JUNCTION DEGC
INTERNAL JUNCTION CONFIGURATIONNPN
INTERNAL CONFIGURATIONJUNCTION CONTACT
TERMINAL TYPE AND QUANTITY3 TAB, SOLDER LUG
FEATURES PROVIDEDHERMETICALLY SEALED CASE
ELECTRODE INTERNALLY-ELECTRICALLY CONNECTED TO CASECOLLECTOR
THREAD SERIES DESIGNATORUNF
POWER RATING PER CHARACTERISTIC2.0 WATTS MAXIMUM COLLECTOR POWER DISSIPATION
VERIFIED SUBSTITUTES & CROSS-REFERENCES 4
JAN2N3999Interchangeable
interchangeable cross-reference
interchangeable
MIL-S-19500/374Interchangeable
interchangeable cross-reference
interchangeable
JANTX2N3999Interchangeable
interchangeable cross-reference
interchangeable
532783-1Interchangeable
Same NIIN cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2N3999?
2N3999 is a TRANSISTOR.
What parts can replace 2N3999?
There are 4 known substitutes for 2N3999: JAN2N3999, MIL-S-19500/374, JANTX2N3999 and 1 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2N3999?
2N3999 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-433-5729. This indicates validated use in U.S. government and defense supply chains.
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