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Technical Data Sheet
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AT-278 — AT-278

✓ Government record, cited
— · MRO · MRO_GENERAL
PRODUCT OVERVIEW

AT-278: AT-278.

The AT-278 is a the manufacturer industrial component. Key specifications include material: STEEL CASE, power_source: SELF-CONTAINED, mounting_type: BASE, storage_temp_range: -20.0 TO 60.0 CELSIUS DEGC, unpackaged_unit_width: 2.70 INCHES NOMINAL IN, current_rating_in_amps: 0.5. This part is cataloged in the U.S.

Government catalog under NSN 7025-01-418-3927, 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
MRO→ MRO_GENERAL→ AT-278
NSN: 7025-01-418-3927
FSC: 7025 — Information Technology Input/output and Storage Devices
CAGE: 0T156 — ALLIED TELESIS, INC. DBA ALLIED TELESIS INVESTMENT INC DIV HEADQUARTERS (USA)
SPECIFICATIONS
materialSTEEL CASE
power_sourceSELF-CONTAINED
mounting_typeBASE
special_featuresTWO PORT TRANSCEIVER PROVIDES INTERFACE BETWEEN THE ETHERNET COAXIAL CABLE AND THE ETHERNET/IEEE 802.3 STATION DATA TERMINAL EQUIPMENT, THICK COAX MEDIA, 10BASE5(N SERIES)
storage_temp_range-20.0 TO 60.0 CELSIUS DEGC
unpackaged_unit_width2.70 INCHES NOMINAL IN
current_rating_in_amps0.5
unpackaged_unit_height1.30 INCHES NOMINAL IN
unpackaged_unit_length6.40 INCHES NOMINAL IN
input_intelligence_typeDIGITAL
output_intelligence_typeDIGITAL
direct_current_voltage_rating_in_volts11.4 AND 15.75
NSN7025-01-418-3927
COMPONENT DIAGRAM
NIC CTRL PHY 0 PHY 1 ROM VRM SFP+ SFP+ LINK ACT PCIe x8 ~167 mm NETWORK ADAPTER | 2-PORT 10GbE | SFP+ | Full Height PCIe x8 | Link/Activity LEDs | PXE boot ROM TITLE NIC ADAPTER PN AT-278 MFR OEM AT-278
KEY FEATURES
•
UNPACKAGED UNIT LENGTH: 6.40 INCHES NOMINAL IN
•
POWER SOURCE: SELF-CONTAINED
•
OUTPUT INTELLIGENCE TYPE: DIGITAL
•
UNPACKAGED UNIT WIDTH: 2.70 INCHES NOMINAL IN
•
DIRECT CURRENT VOLTAGE RATING IN VOLTS: 11.4 AND 15.75
•
UNPACKAGED UNIT HEIGHT: 1.30 INCHES NOMINAL IN
•
INPUT INTELLIGENCE TYPE: DIGITAL
•
STORAGE TEMP RANGE: -20.0 TO 60.0 CELSIUS DEGC
TECHNICAL CHARACTERISTICS
UNPACKAGED UNIT LENGTH6.40 INCHES NOMINAL IN
POWER SOURCESELF-CONTAINED
OUTPUT INTELLIGENCE TYPEDIGITAL
UNPACKAGED UNIT WIDTH2.70 INCHES NOMINAL IN
DIRECT CURRENT VOLTAGE RATING IN VOLTS11.4 AND 15.75
UNPACKAGED UNIT HEIGHT1.30 INCHES NOMINAL IN
INPUT INTELLIGENCE TYPEDIGITAL
STORAGE TEMP RANGE-20.0 TO 60.0 CELSIUS DEGC
SPECIAL FEATURESTWO PORT TRANSCEIVER PROVIDES INTERFACE BETWEEN THE ETHERNET COAXIAL CABLE AND THE ETHERNET/IEEE 802.3 STATION DATA TERMINAL EQUIPMENT, THICK COAX MEDIA, 10BASE5(N SERIES)
MATERIALSTEEL CASE
SUBSTITUTES & CROSS-REFERENCES 6
190082-7013Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
AT-208-05Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
256425-1Same NSN cross-reference
Same NSN cross-reference
Also cataloged under this NSN
AT-274-05Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
AT-F274-05Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
AT-278-05Reference document
Same NSN cross-reference
Reference document — Advisory reference — outside the item-of-supply concept
LIFECYCLE
NSN statusActive· U.S. Government catalog
Acquisition advice: Terminal item — stock exhausted; no further procurementNo demilitarization required
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FREQUENTLY ASKED QUESTIONS
What is AT-278?
AT-278 is a AT-278. It is classified as a MRO (MRO_GENERAL).
What parts can replace AT-278?
There are 6 known substitutes for AT-278: 190082-7013, AT-208-05, 256425-1 and 3 more. Substitute compatibility should be verified for your specific system.
What is the NSN for AT-278?
AT-278 is cataloged in the U.S. Government catalog under NSN 7025-01-418-3927. This indicates validated use in U.S. government and defense supply chains.
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✓ PartsTable — the parts reference. Every fact cited to its source.
PartsTable Design LLC · partstable.com
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.
PartsTable commercial catalog: edition Unified commercial catalog snapshot through 2026-09-28, edition date not on file, retrieved 2026-09-28.