Mitsubishi Q20UDHCPU Q Series CPU | Industrial Spare Part

The Mitsubishi Electric Q20UDHCPU is a High-Speed Universal model QCPU programmable logic controller engineered for the MELSEC-Q Series automation platform, featuring 200K steps program memory, standard serial and USB interfaces, and industrial control capabilities.

Key Technical Specifications

• Manufacturer: Mitsubishi Electric
• Model / Catalog Number: Q20UDHCPU
• Product Series: MELSEC-Q Series (High-Speed Universal Model QCPU)
• Program Capacity: 200K steps (800K bytes, per Mitsubishi Electric QnUCPU User's Manual (Function Explanation, Program Fundamentals) SH-080807ENG)
• Basic Instruction Processing Speed: 9.5 ns (0.0095 µs) for basic LD X0 instruction (indicative basic execution speed; does not represent total scan cycle)
• Number of I/O Points: 4096 (per Mitsubishi Electric QCPU User's Manual (Hardware Design and Maintenance Inspection) SH-080483ENG)
• Number of I/O Device Points: 8192 (per SH-080483ENG)
• Internal Current Consumption (5V DC): 0.40 A (per Mitsubishi Electric official product specification)
• Built-in Communication Interfaces: 1x USB Mini-B programming interface (intended for CPU programming and maintenance per SH-080483ENG; verify connection method and specifications in official hardware documentation) and 1x RS-232 serial interface (Mini-DIN 6-pin connector; pinout and communication protocol per official hardware manual)
• Multi-CPU Support: Multi-CPU configurations require verification of compatible MELSEC-Q main base unit models and system engineering rules per QCPU User's Manual (Multi-CPU System) SH-080485ENG
• Memory Card and Battery: Memory card interface and supported media (including SRAM, Flash, and ATA cards where specified for the applicable CPU model) must be verified against the relevant Mitsubishi Electric hardware manual and model-specific compatibility information. Backup battery requirements depend on the CPU model, hardware configuration, and applicable documentation per SH-080483ENG. Memory cards, batteries, and mounting hardware are not assumed to be included unless explicitly confirmed in the formal quotation
• Engineering Software: Software compatibility across GX Works2 and GX Developer depends on specific software versions, operating systems, and existing project configurations. Engineering verification prior to deployment is advised

System Configuration Notice

The Q20UDHCPU mounts into compatible MELSEC-Q Series main base units. Verify base unit model compatibility, power supply current capacity (5V DC internal current consumption: 0.40 A), and module placement rules against official Mitsubishi Electric technical documentation before installation.

Product Lifecycle and Sourcing Notice

Mitsubishi Electric Technical Bulletin FA-A-0418-A lists September 30, 2026 as the order-acceptance deadline, October 30, 2026 as the planned production discontinuation date, and October 31, 2033 as the end of the stated repair support period. The order-acceptance deadline listed in this bulletin has passed. Actual order acceptance, product lifecycle status, and repair service policies may vary by sales region. Confirm current arrangements with Mitsubishi Electric or its authorized regional sales organization before ordering.

Official-source cross-check: Mitsubishi Electric Technical Bulletin FA-A-0418-A identifies Q26UDVCPU (MELSEC-Q Series) and R32CPU (MELSEC iQ-R Series) as reference migration options. Any model identified as a migration candidate must be evaluated against applicable manufacturer documentation; it is not a guaranteed drop-in replacement. Verify program compatibility, base unit and power supply configuration, serial communication interfaces, I/O architecture, and required system functions before migration.

Manufacturer lifecycle announcements do not indicate current inventory or availability at Northlink. Unit condition (new, surplus, or refurbished), hardware revision, included accessories, warranty terms, and lead times are confirmed solely during formal quotation.

Northlink accepts sourcing inquiries for industrial spare parts intended for maintenance, emergency replacement, and equipment continuity.

Request a Quote

Submit an inquiry with catalog number Q20UDHCPU, required quantity, destination country, and application specifications.

Technical parameters are provided for model identification and engineering reference. Always verify the physical unit nameplate and official manufacturer technical literature prior to installation.