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Technical Data Sheet
PartsTable / MRO / 20-256
20-256 ✓ Verified by PartsTable
Legrand · MRO · MRO_GENERAL
WHAT YOU NEED TO KNOW
Stranded for flexible routing, solid for conduit THHN/THWN dual-rated — check both tables
Ampacity depends on installation method
PRODUCT OVERVIEW

- Compact aluminium case;<br>- With leatherette pocket;<br>- Supports 2.5" SATA HDDs;<br>- USB 2.0 Host Interface;<br>- LED display for power and HDD access;<br>- Plug & Play. Key specifications include criticality_code_justification: ZZZY, reference_number_differentiating_characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATION. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6145-01-332-7457, 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→ 20-256
NSN: 6145-01-332-7457
FSC: 6145
CAGE: 90484 — RSCC WIRE & CABLE LLC (USA)
SPECIFICATIONS
criticality_code_justificationZZZY
reference_number_differentiating_characteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATION
NSN6145-01-332-7457
COMPONENT DIAGRAM
WIRE / CABLE — AMPACITY DEPENDS ON INSTALLATION CROSS-SECTION JACKET WIRE SPECIFICATIONS Conductor Size: — Conductor Count: — Voltage Rating: — Insulation: — Temp Rating: — PN: 20-256 · Legrand ⚠ VERIFY BEFORE ORDERING Ampacity depends on installation method — conduit ≠ free air ≠ underground. Same wire, different ratings. AWG sizing is inverse — smaller number = thicker wire (4 AWG > 12 AWG) ✓ BROKER TIP Stranded = flexible routing and vibration resistance. Solid = fixed conduit runs only. THHN/THWN = dual rated — check both dry and wet ampacity tables PARTSTABLE TECHNICAL DRAWING — NOT TO SCALE
KEY FEATURES
•
CONDUCTOR QUANTITY: 2
•
MATERIAL: PLASTIC POLYOLEFIN ELEVENTH POSITION CONDUCTOR ALL CONDUCTORS
•
CONDUCTOR FORM: STRANDED ALL CONDUCTORS
•
CROSS SECTION OUTSIDE DIAMETER: 0.615 INCHES NOMINAL IN
•
MATERIAL DOCUMENT AND CLASSIFICATION: G452741-1,FSC-49956 MFR REF SINGLE MATERIAL RESPONSE ELEVENTH POSITION CONDUCTOR ALL CONDUCTORS
•
STRAND AWG SIZE PER CONDUCTOR: 29 ALL CONDUCTORS
TECHNICAL CHARACTERISTICS (FLIS)
CONDUCTOR QUANTITY2
MATERIALPLASTIC POLYOLEFIN ELEVENTH POSITION CONDUCTOR ALL CONDUCTORS
MATERIALPLASTIC POLYOLEFIN SEVENTH POSITION CONDUCTOR CABLE
MATERIALCOPPER CORE CONDUCTOR ALL CONDUCTORS
CONDUCTOR FORMSTRANDED ALL CONDUCTORS
CROSS SECTION OUTSIDE DIAMETER0.615 INCHES NOMINAL IN
MATERIAL DOCUMENT AND CLASSIFICATIONG452741-1,FSC-49956 MFR REF SINGLE MATERIAL RESPONSE ELEVENTH POSITION CONDUCTOR ALL CONDUCTORS
STRAND AWG SIZE PER CONDUCTOR29 ALL CONDUCTORS
MATERIAL DOCUMENT AND CLASSIFICATIONASTM B33 ASSN STD SINGLE MATERIAL RESPONSE CORE CONDUCTOR ALL CONDUCTORS
CROSS-SECTIONAL SHAPE STYLEROUND
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
13N16Interchangeable
interchangeable cross-reference
interchangeable
150-618FFITEM38Interchangeable
interchangeable cross-reference
interchangeable
20-256Interchangeable
interchangeable cross-reference
interchangeable
20258Interchangeable
interchangeable cross-reference
interchangeable
6406311-1Interchangeable
interchangeable cross-reference
interchangeable
MM54C08JInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 20-256?
20-256 is a MICROCIRCUIT,DIGITAL manufactured by Legrand. It is classified as a MRO (MRO_GENERAL).
What parts can replace 20-256?
There are 10 known substitutes for 20-256: 13N16, 150-618FFITEM38, 20-256 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 20-256?
20-256 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6145-01-332-7457. 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