SW2MS-LRL Heavy-Duty Explosion-Proof Limit Switch – Large Roller Lever

Marine/Heavy-duty use Explosion-proof Limit Switch – Large Roller Lever 

SW2MS-LRD Brass Housing

  • As product has mechanical intensity, it absorbs flexibly unstable movements aplied by actuator and it performs steady operation.
  • Our independent system, strong returning system with double springs was taken for this item, so it maintains its stable motion after switching on for a long time.
  • Product of strong anti-corrosion by using stainless(SUS) bolts and nuts.
  • Suitable for overhead crane, large conveyor, large industrial machine, outdoor plant facilities.
  • SW2MS series is especially excellent anti-corrosion and flame-retardant, and it is suitble for such places as ship deck machine, harbor loading and unloading, and chemical factory where still exist the corrosive acid and alkaline gas.
  • Standard body color : MUNSELL NO. 7.5BG 7/2
  • Material : Body – DIECAST BRASS
    Cover, Bolts & Nuts, Roller, Lever – SUS
  • Protection class : Water-proof, Oil-proof, Dust-proof (IP67)
  • Certificate : KIMM
  • Custom-made for cold-proof type(-40℃~+40℃), heat-resisting type(+5℃~+120℃)
  • Protection sturucture :
  • Contact resistance :
    대형가변 Roller Lever


Product Specification

Protection Class IP67
Mechanical Lifespan over 300,000 times
Electrical Lifespan over 100,000 times
Allowable Operating Frequency Mechanical 120 times/min
Electrical 30 times/min
Insulation Resistance over 100MΩ (DC 500V))
Contact Resistance under 50mΩ
withstand voltage between non-continuous terminal AC1000V (50/60Hz per 1 min)
between each terminal and non-conducting metal part AC2000V (50/60Hz per 1 min)
shock resistance durability about 1000m/s²(100G)
malfunction about 250m/s²(25G)
vibration 10-55Hz double amplitude 1.5mm
ambient operating-temperature range – 10~+55℃
ambient operating-humidity range 45~85% RH

Operating characteristics

OF max.g : 1,380
RF min.g : 260
PT : 15˚ ± 5˚
MD max : 5˚
TT min : 70˚


SW2MS-LRDabout 2.15 Kg


  1. The size allowance not indicated on the above is ±0.4mm.
  2. In case the product is installed outdoor or for water-proof use, please use water-proof connector or cable gland.
  3. Keep the cable entry airtight by using water-proof cap in case it is contemporary installed outdoor without using water-proof connector or cable gland.
  4. Power entry standard: PF1/2


rated voltage
non-inductive load
inductive load(A)
resistance load lamp load inductive load motor load
normal shut normal open normal shut normal open normal shut normal open normal shut normal open
AC 125 10 3 1.5 10 5 2.5
250 6 2 1 10 3 1.5
480 2 1.5 0.8 3 1.5 0.8
DC 8 10 6 3 6 6
14 10 6 3 6 6
30 6 4 3 4 4
125 0.8 0..2 0.2 0.8 0.2
250 0.4 0.1 0.1 0.4 0.1
Inrush Current normal shut maxium 20A
normal shut maxium 10A
Ambient Operating-temperature Range -10~+70℃(Not freezed)
Ambient Operating-humidity Range under 95%RH
1.Upper cost is based on the normal current.
2.inductive load rate is over 0.4(an alternating current),under 7ms(a direct current)
3.lamp load has 10 times inrush current.
4.motor load current has 6 times inrush current.

Circuit system

Contact Point 2CKT-DB(double 2 circuits)


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