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Technical Data Sheet
2N1557 ✓ 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: 0.250 INCHES MINIMUM AND 0.250 INCHES MINIMUM AND 0.450 INCHES MAXIMUM0.450 INCHES MAXIMUM IN, mounting_method: UNTHREADED HOLE(S), overall_diameter: 0.875 INCHES MAXIMUM0.875 INCHES MAXIMUM IN, special_features: JUNCTION PATTERN ARRANGEMENT: PNPJUNCTION PATTERN ARRANGEMENT: PNP, features_provided: HERMETICALLY SEALED CASE, 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 5961-00-059-1354, 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
2N1557
NSN: 5961-00-059-1354
FSC: 5961
CAGE: 80131 — ELECTRONIC INDUSTRIES ASSOCIATION
SPECIFICATIONS
overall_length0.250 INCHES MINIMUM AND 0.250 INCHES MINIMUM AND 0.450 INCHES MAXIMUM0.450 INCHES MAXIMUM IN
mounting_methodUNTHREADED HOLE(S)
overall_diameter0.875 INCHES MAXIMUM0.875 INCHES MAXIMUM IN
special_featuresJUNCTION PATTERN ARRANGEMENT: PNPJUNCTION PATTERN ARRANGEMENT: PNP
features_providedHERMETICALLY SEALED CASE
internal_configurationJUNCTION CONTACT
semiconductor_materialGERMANIUM
mounting_facility_quantity22
terminal_type_and_quantity1 PIN OR 2 PIN
specification/standard_data80131-2N1557 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
internal_junction_configurationPNP
power_rating_per_characteristic90.0 WATTS MAXIMUM COLLECTOR POWER DISSIPATION90.0 WATTS MAXIMUM COLLECTOR POWER DISSIPATION
NSN5961-00-059-1354
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 2N1557 MFR OEM TRANSISTOR
KEY FEATURES
TERMINAL TYPE AND QUANTITY: 1 PIN OR 2 PIN
SEMICONDUCTOR MATERIAL: GERMANIUM
INTERNAL JUNCTION CONFIGURATION: PNP
FEATURES PROVIDED: HERMETICALLY SEALED CASE
INTERNAL CONFIGURATION: JUNCTION CONTACT
SPECIFICATION/STANDARD DATA: 80131-2N1557 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
TECHNICAL CHARACTERISTICS (FLIS)
TERMINAL TYPE AND QUANTITY1 PIN OR 2 PIN
SEMICONDUCTOR MATERIALGERMANIUM
INTERNAL JUNCTION CONFIGURATIONPNP
FEATURES PROVIDEDHERMETICALLY SEALED CASE
INTERNAL CONFIGURATIONJUNCTION CONTACT
SPECIFICATION/STANDARD DATA80131-2N1557 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
RELEASE3159Interchangeable
interchangeable cross-reference
interchangeable
JAN2N1557AInterchangeable
interchangeable cross-reference
interchangeable
2N678Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2N1557?
2N1557 is a TRANSISTOR.
What parts can replace 2N1557?
There are 3 known substitutes for 2N1557: RELEASE3159, JAN2N1557A, 2N678. Substitute compatibility should be verified for your specific system.
What is the NSN for 2N1557?
2N1557 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-059-1354. This indicates validated use in U.S. government and defense supply chains.
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