The Moujen MJ2-1308R is a micro limit switch fitted with a side roller plunger push actuator. The roller sits on the side of the body rather than the top, so the moving part presses in horizontally. That matters when there is no clearance above the switch, or when the cam travels along a frame rather than down onto it.

The roller rotates as the cam passes, which is what keeps the trip point stable over long service. A bare plunger scrapes against the cam on every pass, and that wear slowly shifts the operating point until the switch has to be reset or replaced. With a roller, friction stays low and the switch keeps repeating the same position.

Ratings run to 15A at 125 or 250V AC, with 1/4 HP motor switching at 250V AC, so the switch can drive a small motor directly instead of going through a contactor. IP55 sealing covers dust and low pressure water for normal machine shop conditions. The MJ2 series body is compact enough for tight mounting positions while still taking full industrial current.

Key Features

Side roller plunger push actuator for horizontal approach
Roller reduces friction and keeps the trip point repeatable
15A switching at both 125V and 250V AC
1/4 HP motor capability at 250V AC
Fine operating speed range from 0.01mm per second
IP55 protection against dust and low pressure water
UL Listed and CE Mark certified
Genuine Moujen product manufactured in Taiwan

Technical Specifications

Specification	Detail
Actuator Type	Side Roller Plunger Push
Range of Product	MJ2 Series
Ratings	15A at 125 or 250V AC
	1/8 HP at 125V AC
	1/4 HP at 250V AC
	1/2A at 125V DC
	1/4A at 250V DC
Operating Speed	0.01mm to 1m/sec
IP Degree of Protection	IP55
Standard Certification(s)	UL Listed, CE Mark
Make / Brand	Moujen
Country of Origin	Taiwan
Weight	0.07kg
SKU	MJ21308R

Common Applications

Side cam sequencing on machine tools, door and guard edge detection where clearance above the switch is limited, carriage and slide end stops, jig and fixture position confirmation, conveyor stop positions, small motor switching without a contactor, and tight mounting positions where a top actuated switch will not fit.

Related Products

The actuator is what decides the switch, so match it to the direction the moving part arrives from. Where the cam presses down from above, the roller top plunger limit switch AM-1308 shares the same 15A class in a top actuated body. Where the push can come in at more than one angle, the cross roller plunger limit switch ME-8122 is the Moujen 5A alternative.

If the switch has to reach out to the moving part instead of being pressed directly, the adjustable roller lever mini limit switch AZ-8108 and the adjustable rod limit switch AZ-8107 cover 5A duty, and the adjustable roller lever limit switch AZ-5108 handles 10A in a heavier body.

See every option in the same current class under 15A micro switches, or browse the full limit and micro switches category for lever, plunger, spring, rod and foot switch types.

Why Buy From Qahraba

Qahraba supplies electrical contractors, panel builders and machine builders across the UAE and worldwide. Every limit switch we stock is genuine Moujen product with full certification. Local UAE orders ship within 1 to 2 working days, or collect free from our Dubai store. Call or WhatsApp +971 52 913 9543 for bulk pricing and availability.

FAQ,s

What is a side roller plunger push actuator?

It is a plunger mounted on the side of the switch body with a roller on its tip. The moving part presses the roller in horizontally rather than from above, which suits mountings with no overhead clearance.

When should I choose a side actuator over a top one?

When the cam or moving part travels along a frame rather than down onto the switch, or when there is no space above the switch for a top plunger to be reached.

Why does the roller matter?

A sliding cam wears a plain plunger head over time, which shifts the trip point. The roller turns instead of scraping, so the switch keeps operating at the same position for far longer.

Can this switch drive a motor directly?

Yes, up to 1/4 HP at 250V AC and 1/8 HP at 125V AC. Larger motors should run through a contactor with this switch controlling the coil.

Is IP55 enough for a workshop?

IP55 handles dust and low pressure water, which covers most indoor machine and workshop conditions. For washdown or coolant heavy areas choose an IP65 or IP67 rated model.

What is the MJ2 series?

It is Moujen’s industrial micro limit switch range, available with different actuator heads on a common body, so you can standardise on one switch size across a machine.

Side Roller Plunger Push Type Micro Limit Switch 15A IP55 MJ2-1308R Moujen Taiwan