KJT heavy-duty limit switch is a mechanical control switch, which is used for conveyor belt deviation prevention, crane over-roll protection, and rope pull switch. Taking advantage of its high reliability, it is widely used in steel equipment, large conveying machinery, loading and unloading machinery and cement equipment. Resistant to harsh environments. The glass sealed contacts are filled with inert gas and are not affected by the environment. Resistant to vibration, impact, and wide range of applications.

Product parameters
model	MR 441-11Y
Principle of action	Mechanical
Shell raw materials	Gray cast iron, galvanized
Contact material	silver
gross weight	1,452g
Normally closed quantity (NC)	1
Normally open quantity (NO)	1
B 10D normally closed contact (NC)	2,000,000 operations
operating units	roller plunger
Roller material	plastic
Mechanical life	5,000,000 operations
action angle, Counting from the left side of the switch shaft	30°
action angle, Counting from the right side of the switch shaft	30°
contact open circuit	2×2.5mm
Minimum drive speed	1mm/min
Maximum action speed	0.5m/sec
Notice	Action speed: Driving speed of the vertical drive angle switching axis
Circuit connection	Screw connection M20 x 1.5
Minimum cable cross-section	1.5mm²
Maximum cable cross section	2.5mm²
Notice	Cable part: including conductor ferrules
Wire cross section	13 AWG
Product Size
length, width and height	63mm*106mm*145mm
Caster width	6.5mm
Caster diameter	25mm
Application environmental conditions
Protection level	IP65
ambient temperature	-30 ... +90°C
Rated insulation voltage	250 VAC
Rated impulse withstand voltage	4kV
Electrical data
Thermal test current	16A
Application categories	AC-15: 250 V / 4 A
switching element	Normally open contact, normally closed contact
Switching principle	quick action
Maximum bounce duration	5 ms
Maximum switching time	35 ms

     

NOTE Switch travel diagram   Contact closed   Contact open   Set range   breakpoint   Definitely opening order/angle VS   NO contact adjustment range VÖ  NC contact adjustable range N   After the trip