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Mitsubishi Electric Q312BE — PLCs (Programmable Logic Controllers)

Mitsubishi Q312BE Base Unit, 12 Slots, 439 x 98 x 44.1 mm

MPNQ312BE

Mitsubishi Q312BE base unit, 12 slots, 1 W, 439 x 98 x 44.1 mm, mature lifecycle.

$277.77 – $625.20Ref. price · indicative, final on quote
Sourced new & surplus through independent channelsAuthenticity-screened · ESD-safe packingListing updated Jul 2026

Specifications

Q312BE — Specifications
ParameterValue
Power1
ManufactureMitsubishi
No_of_slots12
Dimensions_text439 x 98 x 44.1 mm

Product details

The Mitsubishi Q312BE is a 12-slot base unit for the MELSEC-Q series PLC rack. It provides the mechanical backplane and power distribution for up to 12 modules — CPU, I/O, special-function, or network — in a single rack. The 1 W power draw is the base unit's own consumption; the module slots supply the system power from the connected power supply module.

The 12-slot layout leaves one slot reserved for the power supply module (per Mitsubishi's rack configuration rules). Slot numbering starts from the left; the CPU occupies slot 0, and the remaining 11 slots accept any Q-series module. The base unit carries no active electronics beyond the backplane bus — all slot current is drawn from the power supply module, not the base.

Frequently asked questions

What is Q312BE's listed has_mpn (Q312B-E) on this component line?

The Q312BE carries the alternate MPN Q312B-E — the same base unit, same 12-slot configuration, same dimensions. Either code references the identical physical part.

Will Q312BE drop into a panel that was specified around Q312B-E without rewiring?

Yes. Q312BE and Q312B-E are the same base unit under different order codes. No rewiring or mechanical modification is needed — the slot layout, backplane pinout, and DIN-rail mounting are identical.

What is Q312BE's listed power_w (1) on this component line?

The Q312BE base unit draws 1 W, which is its own backplane consumption. All module power comes from the rack's power supply module, not the base.

Who supplies Q312BE and how is it quoted for volume purchases?

The Q312BE is sourced to order against an RFQ through independent distribution. Submit a request with your target quantity and delivery window; availability and current pricing are confirmed at quote time.

MPN
Q312BE