12 Position Selector Switch without Off 25A 1 Pole IP55 MZ12396 MERZ

The MERZ MZ12396 is a 12 position Selector Switch built for panels where a single knob has to reach a large number of circuits. The plate is marked 1 through 12 with no off step, so the switch is always making one position. That continuous selection is what you want on measurement and monitoring duty, where a dead position in the middle of the sequence would just be a gap in the reading.

At 25A 600VAC it carries more current than the common 20A cam switches, which gives extra headroom on feeders and motor selection circuits. IP55 protection on the front face means it holds up in workshop and outdoor rated enclosures where dust and hose down water reach the panel door. Front mounting with four hole screws makes installation straightforward on any flat door or enclosure face.

The 48mm by 48mm plate is the same standard footprint used by panel meters and controllers, so the switch lines up cleanly in a row of instruments. Manufactured in Europe by MERZ, it is specified where a client wants European origin equipment rather than Far East product.

Key Features

• Twelve selectable positions marked 1 to 12 with no off step

• 25A 600VAC rating gives headroom over standard 20A devices

• IP55 protection for dusty and wash down environments

• Front mounting with four hole screws for simple installation

• Standard 48mm by 48mm plate matches panel instrument cutouts

• Single pole construction for straightforward selection duty

• European manufacture by MERZ

Technical Specifications

Common Applications

Twelve way voltmeter and ammeter selection on multi feeder boards, selecting between banks of sensors or measurement points, pump and fan group selection in plant rooms, generator and load bank monitoring panels, stage selection on process machinery, and any control station where the operator needs continuous selection without an off position.

Choosing the Right Selector Switch

Position count, pole count and whether you need an off step all drive the choice, so it is worth matching the switch to the circuit rather than buying the largest available. For lower step counts the Auspicious range covers the common cases: the 4 step switch with off C098, the 5 position switch C102A and the 7 position switch C108 are all single pole 20A devices on the same 48x48 plate.

Where all three phases have to switch together, step up to a multi pole model such as the 4 position 3 pole rotary switch C100, the four pole 4 way selector switch C096 or the 3 position 4 pole selector switch C117, which like this MERZ unit has no off position.

For higher step counts with an off position, see the 10 position cam switch C112 and the 11 position cam switch C113. Browse the full multi step rotary switches range or the wider selector switches and isolators category.

Why Buy From Qahraba

Qahraba supplies electrical contractors, panel builders and procurement engineers across the UAE and worldwide. Local UAE orders ship within 1 to 2 working days, free above AED 250, or collect free from our Dubai store. Call or WhatsApp +971 52 913 9543 for bulk pricing or contact sequence charts.

FAQ 

What does a Selector Switch do?

A Selector Switch lets an operator choose between multiple circuits or modes by rotating a single knob. Internal contacts open and close in a defined sequence at each detent, so one control point can address many circuits.

Why does this switch have no off position?

It is built for continuous selection duty such as metering, where the switch should always be reading one of twelve points. If you need to break the circuit entirely, choose a model with a 0 step or fit a separate isolator.

What does IP55 protection mean?

IP55 means the switch resists dust ingress and low pressure water jets from any direction, which suits workshop floors, plant rooms and outdoor rated enclosures.

What panel cutout does the MZ12396 need?

The plate is 48mm by 48mm and mounts from the front with four screws, matching the standard instrument cutout on most panel doors.

Can it switch three phase circuits?

This is a single pole device, so it switches one line only. For simultaneous three phase switching choose a 3 or 4 pole model.

Is a wiring diagram available?

Yes. Contact us on +971 52 913 9543 and we will send the MZ12396 contact sequence chart.