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Technical Data Sheet
PartsTable / MEMORY / 89055
89055 ✓ Verified by PartsTable
Legrand · MEMORY · RDIMM
WHAT YOU NEED TO KNOW
Memory is a hot market right now. DDR5 and DDR4 are extremely volatile with data centers driving availability to extreme lows. Always validate machine type and model. Remember: all RAM is Hynix, Samsung, or Micron underneath OEM labels — use that to find alternatives. Key checks: Check OEM alternatives — all RAM is Hynix/Samsung/Micron underneath. Double-check what you're quoting in volatile market.
HOT market — DDR5/DDR4 extremely volatile
PRODUCT OVERVIEW

Legrand’s transceiver offering has been expanded to operate in a wider range of equipment from popular manufacturers such as Arista®, Brocade®, Cisco®, Finisar®, HP®, Juniper®, and more. Legrand’s transceiver offering is competitively priced, TAA compliant and guaranteed to meet or exceed OEM specifications. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-01-407-3956, 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
MEMORY→ RDIMM→ 89055
NSN: 5999-01-407-3956
FSC: 5999
CAGE: 037Z3 — DLA LAND AND MARITIME DBA ENGINEERING AND TECHNICAL SUPPORT DIV DOCUMENT STANDARDIZATION DIVISION (DRAWINGS) (USA)
SPECIFICATIONS
temp_rating113.0 FAHRENHEIT SINGLE RESPONSE DEGF
special_featuresINCLUDES TWO 2-210 EPR O-RINGS, 2.5 INCH AND 4.0 INCH ELEMENT COUPLER, USED FOR 2.5 INCH AND 4.0 INCH DIAMTER ELEMENTS, NEXT HIGHER ASSEMBLY SW30-4040, NAME OF EQUIPMENT MEMBRANE IN
operating_pressure1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS
media_for_which_designedWATER, SALT SINGLE RESPONSE
cross-sectional_shape_styleROUND
part_name_assigned_by_controlling_agencyELEMENT COUPLER
NSN5999-01-407-3956
COMPONENT DIAGRAM
ECC 4GB 2Rx4 PC4 — RDIMM Legra NOTCH ~133.35 mm DDR4 RDIMM | 4GB | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 89055 MFR Legrand 4GB —
KEY FEATURES
•
4GB Capacity
•
STYLE DESIGNATOR: CENTER CONTACT
•
MOUNTING METHOD: TERMINAL
•
SURFACE TREATMENT: GOLD BODY AND CONTACT
•
MATERIAL DOCUMENT AND CLASSIFICATION: MIL-C-39029 MIL SPEC SINGLE MATERIAL RESPONSE BODY AND CONTACT
•
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION: MIL-G-40204, TYPE 2, GRADE C, CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE BODY AND CONTACT
•
OVERALL DIAMETER: 0.218 INCHES NOMINAL IN
•
MATERIAL: COPPER ALLOY BODY AND CONTACT
•
PRECIOUS MATERIAL AND LOCATION: BPDU AND CONTACT SURFACES GOLD
TYPICAL APPLICATIONS
  • Server memory expansion for virtualization workloads
  • Database performance optimization (in-memory computing)
  • VDI and remote desktop session hosting
  • High-performance computing (HPC) clusters
  • Mail server and collaboration platform scaling
  • Application server tier expansion
TECHNICAL CHARACTERISTICS (FLIS)
STYLE DESIGNATORCENTER CONTACT
MOUNTING METHODTERMINAL
SURFACE TREATMENTGOLD BODY AND CONTACT
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-C-39029 MIL SPEC SINGLE MATERIAL RESPONSE BODY AND CONTACT
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-G-40204, TYPE 2, GRADE C, CLASS 1 MIL SPEC SINGLE TREATMENT RESPONSE BODY AND CONTACT
OVERALL DIAMETER0.218 INCHES NOMINAL IN
MATERIALCOPPER ALLOY BODY AND CONTACT
PRECIOUS MATERIAL AND LOCATIONBPDU AND CONTACT SURFACES GOLD
PRECIOUS MATERIALGOLD
PRECIOUS MATERIAL AND WEIGHT0.005 GOLD GRAINS, TROY
VERIFIED SUBSTITUTES & CROSS-REFERENCES 13
051227Interchangeable
interchangeable cross-reference
interchangeable
1932Interchangeable
IBM 4GB (2 x 2GB) PC2-4200 DDR2 Memory Kit
interchangeable
5035AInterchangeable
interchangeable cross-reference
interchangeable
5L4591-003-40Interchangeable
interchangeable cross-reference
interchangeable
053744-0000Interchangeable
interchangeable cross-reference
interchangeable
DM53744Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 89055?
89055 is a IBM 4GB (2 x 2GB) PC2-4200 DDR2 Memory Kit manufactured by Legrand. It is classified as a MEMORY (RDIMM).
What parts can replace 89055?
There are 13 known substitutes for 89055: 051227, 1932, 5035A and 10 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 89055?
89055 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5999-01-407-3956. 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.
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Last verified: July 2026