The Moujen M8-8603A is a side roller plunger limit switch from the M8 series, built to detect a moving part and switch a control circuit when that part arrives. The roller sits on a plunger that enters from the side of the body, so a cam or dog travelling horizontally presses it square on without needing a lever to reach out.

The 400V AC rating is what separates this from most mini limit switches. Where a typical unit tops out at 250V, this one is built for 400V circuits, so it can sit directly in three phase control wiring without an interposing relay. At 4A it is sized for control duty rather than motor switching.

IP66 sealing takes it a step beyond the common IP65 rating, meaning the body is dust tight and withstands powerful water jets rather than just low pressure spray. Combined with oil tight construction and stainless steel internals, that makes it suitable for washdown areas, machine tools running coolant and outdoor equipment. Moujen is a Taiwanese manufacturer, and the M8 series carries UL and CE approvals for export machinery.

Key Features

Side roller plunger meets horizontal travel square on
High 400V AC rating for direct use in three phase control circuits
Rated 4A AC and 0.3A at 220V DC for resistive loads
IP66 sealing withstands dust and powerful water jets
Oil tight and water resistant with stainless steel internals
Roller reduces friction and wear from sliding cams
UL Listed and CE Mark certified
Manufactured in Taiwan by Moujen

Technical Specifications

Specification	Detail
Product Type	Mini Limit Switch
Range of Product	M8 Series
Model	M8-8603A
Actuator	Side Roller Plunger
AC Rating	4A at 400V AC resistive
DC Rating	0.3A at 220V DC resistive
Degree of Protection	IP66
Construction	Dust Proof, Oil Tight, Water Resistant, Stainless Steel Essentials
Certification	UL Listed, CE Mark
Brand	Moujen
Country of Origin	Taiwan
SKU	M8-8603A

Common Applications

End of travel detection on sliding carriages and tables, door and guard position sensing, cam operated sequencing on machine tools, washdown areas in food and beverage plants, coolant heavy machining centres, outdoor conveyors and material handling, and three phase control circuits where a 250V rated switch would be unsuitable.

Related Moujen and Auspicious Limit Switches

Actuator type depends on how the moving part arrives. For contact from more than one direction, the Moujen ME-8122 cross roller plunger limit switch accepts an angled approach at 5A and IP65.

Where the target sits away from the switch or the contact point varies, a lever reaches out to meet it. The adjustable roller lever limit switch AZ-8108 lets you set the lever length, the adjustable rod limit switch AZ-8107 gives long reach onto irregular targets, and the lever limit switch AZ-7120 is a compact side mount option.

For heavier duty, the 10A adjustable roller lever limit switch AZ-5108 and the big wheel limit switch AZ-5108L carry 10A at IP67, with the latter built for lifts and cranes. Where an overrun could snap a rigid actuator, the spring limit switch AZ-8166 flexes instead.

Browse the full 5 amp mini limit switch range or the wider limit and micro switches category.

Why Buy From Qahraba

Qahraba supplies electrical contractors, panel builders and machine builders across the UAE and worldwide. We stock genuine Moujen and Auspicious limit switches with full certification. 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.

FAQ,s

Who is Moujen?

Moujen is a Taiwanese manufacturer of limit switches and micro switches. Their M8 and ME series are widely used in machine building and industrial automation, and carry UL and CE approvals.

What is a side roller plunger limit switch?

It is a limit switch where the actuator enters from the side of the body with a roller on the end. A part moving horizontally presses the roller directly, with no lever needed.

Why does the 400V rating matter?

Most mini limit switches are rated to 250V AC. At 400V this one can be wired straight into three phase control circuits without an interposing relay, which simplifies the panel.

What is the difference between IP65 and IP66?

Both are dust tight. IP65 resists low pressure water jets, while IP66 withstands powerful jets, making it the better choice for washdown areas and exposed outdoor positions.

Can this switch control a motor?

No. At 4A it is sized for control circuits. Use it to switch a contactor coil and let the contactor handle the motor.

Is a catalog available?

Yes, the M8 series catalog is linked above and covers the full actuator range and dimensions.

Side Roller Plunger Type Limit Switch IP66 M8-8603A Moujen