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Technical Data Sheet
2N1681 ✓ 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: 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN, mounting_method: TERMINAL, terminal_length: 1.500 INCHES MINIMUM IN, overall_diameter: 0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN, special_features: JUNCTION PATTERN ARRANGEMENT: PNP, features_provided: HERMETICALLY SEALED CASE. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-027-4973, 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
2N1681
NSN: 5961-00-027-4973
FSC: 5961
CAGE: 80131 — ELECTRONIC INDUSTRIES ASSOCIATION
SPECIFICATIONS
overall_length0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
mounting_methodTERMINAL
terminal_length1.500 INCHES MINIMUM IN
overall_diameter0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
special_featuresJUNCTION PATTERN ARRANGEMENT: PNP
features_providedHERMETICALLY SEALED CASE
internal_configurationJUNCTION CONTACT
semiconductor_materialGERMANIUM
terminal_circle_diameter0.200 INCHES NOMINAL IN
terminal_type_and_quantity3 UNINSULATED WIRE LEAD
power_rating_per_characteristic180.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
current_rating_per_characteristic200.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC AND 3.00 MICROAMPERES MAXIMUM COLLECTOR CUTOFF CURRENT, DC, EMITTER OPEN
NSN5961-00-027-4973
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 2N1681 MFR OEM TRANSISTOR
KEY FEATURES
POWER RATING PER CHARACTERISTIC: 180.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
OVERALL DIAMETER: 0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
INTERNAL CONFIGURATION: JUNCTION CONTACT
TERMINAL LENGTH: 1.500 INCHES MINIMUM IN
TERMINAL CIRCLE DIAMETER: 0.200 INCHES NOMINAL IN
MOUNTING METHOD: TERMINAL
FEATURES PROVIDED: HERMETICALLY SEALED CASE
TECHNICAL CHARACTERISTICS (FLIS)
POWER RATING PER CHARACTERISTIC180.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
OVERALL DIAMETER0.335 INCHES MINIMUM AND 0.370 INCHES MAXIMUM IN
INTERNAL CONFIGURATIONJUNCTION CONTACT
TERMINAL LENGTH1.500 INCHES MINIMUM IN
TERMINAL CIRCLE DIAMETER0.200 INCHES NOMINAL IN
MOUNTING METHODTERMINAL
OVERALL LENGTH0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM IN
FEATURES PROVIDEDHERMETICALLY SEALED CASE
CURRENT RATING PER CHARACTERISTIC200.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC AND 3.00 MICROAMPERES MAXIMUM COLLECTOR CUTOFF CURRENT, DC, EMITTER OPEN
SPECIAL FEATURESJUNCTION PATTERN ARRANGEMENT: PNP
VERIFIED SUBSTITUTES & CROSS-REFERENCES 6
2N2492Interchangeable
interchangeable cross-reference
interchangeable
RELEASE4088Interchangeable
interchangeable cross-reference
interchangeable
A221886-2Interchangeable
interchangeable cross-reference
interchangeable
2N1182Interchangeable
interchangeable cross-reference
interchangeable
2N2493Interchangeable
interchangeable cross-reference
interchangeable
208275-2Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2N1681?
2N1681 is a TRANSISTOR.
What parts can replace 2N1681?
There are 6 known substitutes for 2N1681: 2N2492, RELEASE4088, A221886-2 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 2N1681?
2N1681 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-027-4973. This indicates validated use in U.S. government and defense supply chains.
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