Micron Memory Part Number Decoder __top__ May 2026

The Ultimate Guide to the Micron Memory Part Number Decoder

  1. MT18: It's a DDR4 Micron Module.
  2. ASF: It's likely a standard form factor.
  3. 72: It is an ECC module (Server grade).
  4. -2E: It runs at 2666 MT/s.
  • MT40 = Base DRAM component family (DDR4)
  • A = Generation / voltage (1.2V)
  • 1G = 1 Gigabit per chip
  • 16 = Organization (x16, meaning 16 I/O pins)
  • RC = Package type (78-ball FBGA)
  • 083E = Speed (DDR4-2400, 083 = 0.833ns cycle time)
  • E = Halogen-free / lead-free

The "TR" Suffix

: Often found at the end of a part number (e.g., MT...-0SIT TR ), this simply indicates "Tape and Reel" packaging for shipping, as noted on the DigiKey TechForum .

If you work in IT procurement, system building, or hardware repair, you have likely stared at a string of alphanumeric characters on a RAM stick and wondered what it all means. Micron Technology—parent company of the consumer-facing brand Crucial—is one of the world’s largest manufacturers of DRAM, NAND, and SSD storage. Their part numbering system is complex but incredibly logical. micron memory part number decoder

non-ECC

Before diving into the syntax, understand the stakes. Two memory modules can look identical physically but have entirely different electrical characteristics. For example, a Micron module labeled MTA18ADF2G72AZ is a 16GB DDR4 ECC registered DIMM. Change one character— MTA18ASF2G72AZ —and it becomes a unbuffered DIMM. Plugging the wrong one into a server motherboard might prevent POST (Power-On Self-Test). The Ultimate Guide to the Micron Memory Part Number Decoder

Micron uses two distinct identification systems that often confuse users: Marketing Part Number (MPN): The full identifier (e.g., MT40A512M16LY-083R:H ). These are found on module labels and invoices. FBGA Code: A short, 5-digit alphanumeric code (e.g., MT18 : It's a DDR4 Micron Module