Mitsubishi Electric memory cards and extended SRAM cassettes store program and data for MELSEC-Q and MELSEC iQ-R controllers. This page lists orderable MELSEC-Q SRAM cards, Q4MCA extended SRAM cassettes and MELSEC iQ-R NZ2MC extended SRAM cassettes.

Which MELSEC-Q SRAM memory cards are available?

• Orders for these MELSEC-Q memory cards are accepted until 30 September 2029, per Mitsubishi Electric notice FA-A-0495-A.
• Q2MEM-1MBSN: Compact SRAM, 1 MB, for the MELSEC-Q CPU memory-card slot.
• Q2MEM-2MBSN: Compact SRAM, 2 MB, for the MELSEC-Q CPU memory-card slot.
• Q3MEM-4MBS: Compact SRAM, 4 MB, for the MELSEC-Q CPU memory-card slot.
• Q3MEM-4MBS-SET: Compact SRAM, 4 MB, with cover.
• Q3MEM-8MBS: Compact SRAM, 8 MB, for the MELSEC-Q CPU memory-card slot.
• Q3MEM-8MBS-SET: Compact SRAM, 8 MB, with cover.

Which MELSEC-Q extended SRAM cassettes are available?

• Orders for these Q4MCA cassettes are accepted until 30 September 2029, per Mitsubishi Electric notice FA-A-0495-A.
• Q4MCA-1MBS, Q4MCA-2MBS, Q4MCA-4MBS and Q4MCA-8MBS: extended SRAM cassettes for the cassette slot on High-speed Universal model QCPUs (QnUDV) and Universal model Process QCPUs (QnUDPV).

Which SRAM card batteries are available?

• Q2MEM-BAT and Q3MEM-BAT remain in production per Mitsubishi Electric notice FA-A-0495-A.
• Q2MEM-BAT: battery for Q2MEM SRAM cards.
• Q3MEM-BAT: battery for Q3MEM SRAM cards.

Which MELSEC iQ-R extended SRAM cassettes are available?

• NZ2MC-1MBS, NZ2MC-2MBS, NZ2MC-4MBS, NZ2MC-8MBS and NZ2MC-16MBS: extended SRAM cassettes for MELSEC iQ-R CPUs.

Models in the series

• MELSEC-Q Compact SRAM cards: Q2MEM-1MBSN, Q2MEM-2MBSN, Q3MEM-4MBS, Q3MEM-4MBS-SET, Q3MEM-8MBS, Q3MEM-8MBS-SET.
• MELSEC-Q extended SRAM cassettes: Q4MCA-1MBS, Q4MCA-2MBS, Q4MCA-4MBS, Q4MCA-8MBS.
• SRAM card batteries: Q2MEM-BAT, Q3MEM-BAT.
• MELSEC iQ-R extended SRAM cassettes: NZ2MC-1MBS, NZ2MC-2MBS, NZ2MC-4MBS, NZ2MC-8MBS, NZ2MC-16MBS.

Related products

• MELSEC-Q Series
• MELSEC iQ-R Series

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• Official Mitsubishi Electric distributor, supplying genuine products through an authorized channel.
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• Ask us about current availability, and our specialists can recommend a suitable replacement if needed.
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Contact TKK for model selection or a quotation for your machine.