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Technical Data Sheet
PartsTable / COMPONENT / 666215-721
666215-721 ✓ 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: 0.335 INCHES NOMINAL IN, mounting_method: TERMINAL, terminal_length: 1.500 INCHES MINIMUM IN, overall_diameter: 0.265 INCHES NOMINAL IN, special_features: JUNCTION PATTERN ARRANGEMENT: PNP, internal_configuration: JUNCTION CONTACT. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-954-5817, 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
666215-721
NSN: 5961-00-954-5817
FSC: 5961
CAGE: 12436 — BAE SYSTEMS INFORMATION AND ELECTRONIC SYSTEMS INTEGRATION INC. DIV BAE SYSTEMS INFORMATION & ELECTRONIC SYSTEMS INTEGRATION INC (USA)
SPECIFICATIONS
overall_length0.335 INCHES NOMINAL IN
mounting_methodTERMINAL
terminal_length1.500 INCHES MINIMUM IN
overall_diameter0.265 INCHES NOMINAL IN
special_featuresJUNCTION PATTERN ARRANGEMENT: PNP
internal_configurationJUNCTION CONTACT
semiconductor_materialGERMANIUM
terminal_circle_diameter0.100 INCHES NOMINAL IN
terminal_type_and_quantity3 UNINSULATED WIRE LEAD
power_rating_per_characteristic125.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
current_rating_per_characteristic30.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
voltage_rating_in_volts_per_characteristic40.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 25.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 2.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN
NSN5961-00-954-5817
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 666215-721 MFR OEM TRANSISTOR
KEY FEATURES
•
POWER RATING PER CHARACTERISTIC: 125.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
•
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC: 40.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 25.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 2.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN
•
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT: 100.0 CELSIUS JUNCTION DEGC
•
CURRENT RATING PER CHARACTERISTIC: 30.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
•
TERMINAL LENGTH: 1.500 INCHES MINIMUM IN
•
SEMICONDUCTOR MATERIAL: GERMANIUM
TECHNICAL CHARACTERISTICS (FLIS)
POWER RATING PER CHARACTERISTIC125.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC40.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 25.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN AND 2.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN
OVERALL LENGTH0.335 INCHES NOMINAL IN
SPECIAL FEATURESJUNCTION PATTERN ARRANGEMENT: PNP
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT100.0 CELSIUS JUNCTION DEGC
CURRENT RATING PER CHARACTERISTIC30.00 MILLIAMPERES MAXIMUM COLLECTOR CURRENT, DC
TERMINAL LENGTH1.500 INCHES MINIMUM IN
SEMICONDUCTOR MATERIALGERMANIUM
MOUNTING METHODTERMINAL
TERMINAL CIRCLE DIAMETER0.100 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
91-21-880Interchangeable
interchangeable cross-reference
interchangeable
2N2188Interchangeable
interchangeable cross-reference
interchangeable
082308Interchangeable
interchangeable cross-reference
interchangeable
M231610Interchangeable
interchangeable cross-reference
interchangeable
AA59649-795BInterchangeable
interchangeable cross-reference
interchangeable
8210-1045Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 666215-721?
666215-721 is a TRANSISTOR.
What parts can replace 666215-721?
There are 14 known substitutes for 666215-721: 91-21-880, 2N2188, 082308 and 11 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 666215-721?
666215-721 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-954-5817. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026