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Technical Data Sheet
TQ4401 ✓ 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: 0.260 INCHES MAXIMUM IN, transfer_ratio: 40.0 NOMINAL SMALL-SIGNAL SHORT-CIRCUIT FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER, mounting_method: TERMINAL, terminal_length: 1.500 INCHES MINIMUM IN, overall_diameter: 0.370 INCHES MAXIMUM IN, special_features: JUNCTION PATTERN ARRANGEMENT: PNP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-368-6519, 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
TQ4401
NSN: 5961-00-368-6519
FSC: 5961
CAGE: 01295 — TEXAS INSTRUMENTS INCORPORATED (USA)
SPECIFICATIONS
overall_length0.260 INCHES MAXIMUM IN
transfer_ratio40.0 NOMINAL SMALL-SIGNAL SHORT-CIRCUIT FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER
mounting_methodTERMINAL
terminal_length1.500 INCHES MINIMUM IN
overall_diameter0.370 INCHES MAXIMUM IN
special_featuresJUNCTION PATTERN ARRANGEMENT: PNP
features_providedHERMETICALLY SEALED CASE AND ELECTROSTATIC SENSITIVE
internal_configurationJUNCTION CONTACT
semiconductor_materialGERMANIUM
terminal_circle_diameter0.200 INCHES NOMINAL IN
terminal_type_and_quantity3 UNINSULATED WIRE LEAD
specification/standard_data80131-RELEASE3317 PROFESSIONAL/INDUSTRIAL ASSOCIATION SPECIFICATION
NSN5961-00-368-6519
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 TQ4401 MFR OEM TRANSISTOR
KEY FEATURES
JOINT ELECTRONIC DEVICE ENGINEERING COUNCIL/JEDEC/CASE OUTLINE DESIGNATION: TO-5
POWER RATING PER CHARACTERISTIC: 150.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT: 100.0 CELSIUS AMBIENT AIR DEGC
CURRENT RATING PER CHARACTERISTIC: 100.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
SEMICONDUCTOR MATERIAL: GERMANIUM
TERMINAL LENGTH: 1.500 INCHES MINIMUM IN
FEATURES PROVIDED: HERMETICALLY SEALED CASE
TECHNICAL CHARACTERISTICS (FLIS)
JOINT ELECTRONIC DEVICE ENGINEERING COUNCIL/JEDEC/CASE OUTLINE DESIGNATIONTO-5
POWER RATING PER CHARACTERISTIC150.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT100.0 CELSIUS AMBIENT AIR DEGC
CURRENT RATING PER CHARACTERISTIC100.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
SEMICONDUCTOR MATERIALGERMANIUM
TERMINAL LENGTH1.500 INCHES MINIMUM IN
FEATURES PROVIDEDHERMETICALLY SEALED CASE
OVERALL LENGTH0.260 INCHES MAXIMUM IN
OVERALL DIAMETER0.370 INCHES MAXIMUM IN
TRANSFER RATIO40.0 NOMINAL SMALL-SIGNAL SHORT-CIRCUIT FORWARD CURRENT TRANSFER RATIO, COMMON-EMITTER
VERIFIED SUBSTITUTES & CROSS-REFERENCES 15
2N404Interchangeable
interchangeable cross-reference
interchangeable
163188Interchangeable
interchangeable cross-reference
interchangeable
SES227Interchangeable
interchangeable cross-reference
interchangeable
65326500Interchangeable
interchangeable cross-reference
interchangeable
GIRDER 232036373Interchangeable
interchangeable cross-reference
interchangeable
81-51Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is TQ4401?
TQ4401 is a TRANSISTOR.
What parts can replace TQ4401?
There are 15 known substitutes for TQ4401: 2N404, 163188, SES227 and 12 more. Substitute compatibility should be verified for your specific system.
What is the NSN for TQ4401?
TQ4401 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-368-6519. This indicates validated use in U.S. government and defense supply chains.
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