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Technical Data Sheet
PartsTable / MEMORY / 1801800
1801800 ✓ Verified by PartsTable
— · 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

The 16GB DDR4 2400MHz Module is a the manufacturer memory module engineered for enterprise server and workstation platforms requiring validated, high-reliability memory. Key specifications include overall_width: 0.860 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN, overall_height: 0.590 INCHES MAXIMUM IN, overall_length: 1.205 INCHES MINIMUM AND 1.225 INCHES MAXIMUM IN, mounting_method: TERMINAL, terminal_length: 1.410 INCHES MINIMUM IN, special_features: JUNCTION PATTERN ARRANGEMENT: PNP. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-493-0527, 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→ 1801800
NSN: 5961-00-493-0527
FSC: 5961
CAGE: 03956 — NORTHROP GRUMMAN SYSTEMS CORPORATION (USA)
SPECIFICATIONS
overall_width0.860 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
overall_height0.590 INCHES MAXIMUM IN
overall_length1.205 INCHES MINIMUM AND 1.225 INCHES MAXIMUM IN
mounting_methodTERMINAL
terminal_length1.410 INCHES MINIMUM IN
special_featuresJUNCTION PATTERN ARRANGEMENT: PNP
features_providedHERMETICALLY SEALED CASE
internal_configurationJUNCTION CONTACT
semiconductor_materialSILICON
terminal_type_and_quantity3 UNINSULATED WIRE LEAD
power_rating_per_characteristic20.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
current_rating_per_characteristic1.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC AND 500.00 MILLIAMPERES MAXIMUM BASE CURRENT, DC
NSN5961-00-493-0527
COMPONENT DIAGRAM
ECC 16GB 2Rx4 PC4 2400MHz RDIMM OEM NOTCH ~133.35 mm DDR4 RDIMM | 16GB | 2400MHz | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 1801800 MFR OEM 16GB 2400MHz
KEY FEATURES
•
DDR4 Interface
•
16GB Capacity
•
2400MHz Speed
•
DDR4 Memory
•
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC: 60.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 7.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN AND 40.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN
•
MOUNTING METHOD: TERMINAL
•
CURRENT RATING PER CHARACTERISTIC: 1.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC AND 500.00 MILLIAMPERES MAXIMUM BASE CURRENT, DC
•
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT: 200.0 CELSIUS JUNCTION DEGC
•
POWER RATING PER CHARACTERISTIC: 20.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
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)
VOLTAGE RATING IN VOLTS PER CHARACTERISTIC60.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-BASE, EMITTER OPEN AND 7.0 MAXIMUM BREAKDOWN VOLTAGE, EMITTER-TO-BASE, COLLECTOR OPEN AND 40.0 MAXIMUM BREAKDOWN VOLTAGE, COLLECTOR-TO-EMITTER, BASE OPEN
OVERALL WIDTH0.860 INCHES MINIMUM AND 0.880 INCHES MAXIMUM IN
MOUNTING METHODTERMINAL
SPECIAL FEATURESJUNCTION PATTERN ARRANGEMENT: PNP
CURRENT RATING PER CHARACTERISTIC1.00 AMPERES MAXIMUM COLLECTOR CURRENT, DC AND 500.00 MILLIAMPERES MAXIMUM BASE CURRENT, DC
OVERALL LENGTH1.205 INCHES MINIMUM AND 1.225 INCHES MAXIMUM IN
MAXIMUM OPERATING TEMP PER MEASUREMENT POINT200.0 CELSIUS JUNCTION DEGC
POWER RATING PER CHARACTERISTIC20.0 MILLIWATTS MAXIMUM COLLECTOR POWER DISSIPATION
TERMINAL TYPE AND QUANTITY3 UNINSULATED WIRE LEAD
OVERALL HEIGHT0.590 INCHES MAXIMUM IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 10
40391Interchangeable
16GB DDR4 2400MHz Module
interchangeable
68B418000-211Interchangeable
interchangeable cross-reference
interchangeable
4501-211Interchangeable
interchangeable cross-reference
interchangeable
P2404Interchangeable
interchangeable cross-reference
interchangeable
ZCC40391Interchangeable
interchangeable cross-reference
interchangeable
P2404CCTInterchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 1801800?
1801800 is a 16GB DDR4 2400MHz Module. It is classified as a MEMORY (RDIMM).
What parts can replace 1801800?
There are 10 known substitutes for 1801800: 40391, 68B418000-211, 4501-211 and 7 more. Substitute compatibility should be verified for your specific system.
What is the NSN for 1801800?
1801800 is cataloged in the Federal Logistics Information System (FLIS) under NSN 5961-00-493-0527. 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