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Technical Data Sheet
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876852-B21 ✓ Verified by PartsTable
HPE · DIMM
WHAT YOU NEED TO KNOW
2Rx4 = Dual Rank ×4 chip width (standard server) RDIMM = Registered (servers) | LRDIMM = Load-Reduced (max density)
DDR3 ≠ DDR4 ≠ DDR5 — physically incompatible (notch position)
PRODUCT OVERVIEW

The HP 876852-B21 HPE Synergy 4-port Frame Link Module Manufacturer: HP ItemCondition: REF Model: Alternative Part Numbers: is a HPE industrial component. This product is currently in active production with full OEM support. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-695-0940, 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
876852-B21
NSN: 7025-01-695-0940
FSC: 7025
CAGE: 28480 — HEWLETT-PACKARD COMPANY DBA HP (USA)
SPECIFICATIONS
Part Number876852-B21
ManufacturerHPE
NSN7025-01-695-0940
COMPONENT DIAGRAM
ECC — 2Rx4 PC4 — RDIMM HPE NOTCH ~133.35 mm DDR4 RDIMM | — | — | PC4 Notch position = DDR4 generation | DDR3/DDR4/DDR5 physically incompatible RDIMM = Registered (servers) | LRDIMM = Load-Reduced | UDIMM = Unbuffered TITLE DDR4 RDIMM PN 876852-B21 MFR HPE — —
KEY FEATURES
•
OUTPUT INTELLIGENCE TYPE: DIGITAL
•
CURRENT RATING IN AMPS: 4.2
•
INPUT INTELLIGENCE TYPE: DIGITAL
TECHNICAL CHARACTERISTICS (FLIS)
OUTPUT INTELLIGENCE TYPEDIGITAL
CURRENT RATING IN AMPS4.2
INPUT INTELLIGENCE TYPEDIGITAL
SPECIAL FEATURES12V AT 4.2 A (50 W MAX) V
PART NAME ASSIGNED BY CONTROLLING AGENCY4-PORT FRAME LINK MODULE
OUTPUT INTELLIGENCE TYPEDIGITAL
CURRENT RATING IN AMPS4.2
INPUT INTELLIGENCE TYPEDIGITAL
SPECIAL FEATURES12V AT 4.2 A (50 W MAX) V
PART NAME ASSIGNED BY CONTROLLING AGENCY4-PORT FRAME LINK MODULE
VERIFIED SUBSTITUTES & CROSS-REFERENCES 1
P04749-001Compatible
HPE Synergy 4-port Frame Link Module
compatible
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 1
P04749-001SUBSTITUTE
HPE Synergy 4-port Frame Link Module
HPE
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FREQUENTLY ASKED QUESTIONS
What is 876852-B21?
876852-B21 is a HP 876852-B21 HPE Synergy 4-port Frame Link Module Manufacturer: HP ItemCondition: REF Model: Alternative Part Numbers: manufactured by HPE.
What parts can replace 876852-B21?
There is 1 known substitute for 876852-B21: P04749-001. Substitute compatibility should be verified for your specific system.
What is the NSN for 876852-B21?
876852-B21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 7025-01-695-0940. This indicates validated use in U.S. government and defense supply chains.
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Last verified: July 2026