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Technical Data Sheet
PartsTable / COMPONENT / 1N3644
1N3644 ✓ 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 SEMICONDUCTOR DEVICE,DIODE is a the manufacturer industrial component. Key specifications include material: GLASS ENCLOSURE, overall_length: 0.190 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN, mounting_method: TERMINAL, terminal_length: 1.000 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN, overall_diameter: 0.065 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN, 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 5961-00-877-7113, 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
1N3644
NSN: 5961-00-877-7113
FSC: 5961
CAGE: 52306 — UNITRODE CORP HIGH VOLTAGE DEVICES INC (USA)
SPECIFICATIONS
materialGLASS ENCLOSURE
overall_length0.190 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
mounting_methodTERMINAL
terminal_length1.000 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
overall_diameter0.065 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
features_providedHERMETICALLY SEALED CASE
terminal_type_and_quantity2 UNINSULATED WIRE LEAD
specification/standard_data81349-MIL-S-19500/279 GOVERNMENT SPECIFICATION
current_rating_per_characteristic100.00 MILLIAMPERES MAXIMUM AVERAGE FORWARD CURRENT AVERAGED OVER A FULL 60-HZ CYCLE
voltage_rating_in_volts_per_characteristic1500.0 MAXIMUM REVERSE VOLTAGE, INSTANTANEOUS
NSN5961-00-877-7113
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 1N3644 MFR OEM SEMICONDUCTOR DEVICE,DIODE
KEY FEATURES
•
TERMINAL TYPE AND QUANTITY: 2 UNINSULATED WIRE LEAD
•
SPECIFICATION/STANDARD DATA: 81349-MIL-S-19500/279 GOVERNMENT SPECIFICATION
•
FEATURES PROVIDED: HERMETICALLY SEALED CASE
•
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC: 1500.0 MAXIMUM REVERSE VOLTAGE, INSTANTANEOUS
•
CURRENT RATING PER CHARACTERISTIC: 100.00 MILLIAMPERES MAXIMUM AVERAGE FORWARD CURRENT AVERAGED OVER A FULL 60-HZ CYCLE
•
OVERALL DIAMETER: 0.065 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
•
TERMINAL LENGTH: 1.000 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
TECHNICAL CHARACTERISTICS (FLIS)
TERMINAL TYPE AND QUANTITY2 UNINSULATED WIRE LEAD
SPECIFICATION/STANDARD DATA81349-MIL-S-19500/279 GOVERNMENT SPECIFICATION
FEATURES PROVIDEDHERMETICALLY SEALED CASE
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC1500.0 MAXIMUM REVERSE VOLTAGE, INSTANTANEOUS
CURRENT RATING PER CHARACTERISTIC100.00 MILLIAMPERES MAXIMUM AVERAGE FORWARD CURRENT AVERAGED OVER A FULL 60-HZ CYCLE
OVERALL LENGTH0.190 INCHES MINIMUM AND 0.215 INCHES MAXIMUM IN
OVERALL DIAMETER0.065 INCHES MINIMUM AND 0.110 INCHES MAXIMUM IN
TERMINAL LENGTH1.000 INCHES MINIMUM AND 1.250 INCHES MAXIMUM IN
MOUNTING METHODTERMINAL
MATERIALSILICON SEMICONDUCTOR
VERIFIED SUBSTITUTES & CROSS-REFERENCES 17
538005-5Interchangeable
interchangeable cross-reference
interchangeable
1N3647Interchangeable
interchangeable cross-reference
interchangeable
MIL-PRF-19500/279Interchangeable
interchangeable cross-reference
interchangeable
1N3646Interchangeable
interchangeable cross-reference
interchangeable
JAN1N3646AInterchangeable
interchangeable cross-reference
interchangeable
MILS19500-279Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1N3644?
1N3644 is a SEMICONDUCTOR DEVICE,DIODE.
What parts can replace 1N3644?
There are 17 known substitutes for 1N3644: 538005-5, 1N3647, MIL-PRF-19500/279 and 14 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1N3644?
1N3644 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-877-7113. 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