Notes Switch travel diagram
  Contact closed
  Contact open
  Setting range
  Break point
  Positive opening sequence/- angle
VS  adjustable range of NO contact
  adjustable range of NC contact
N   after travel
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• Mounting hole 22.3 mm
• Mounting Knurled nut
• bis 6 mm Front plate thickness
• with Locking sleeve
• 4 Contacts
• Mounting depth 104 mm
• 2 switch position

Ordering details
Product type descriptionMKSB321/WKT-19.3
Article number101191939
EAN Code
Global Properties
Permanent lightMKS Kreuzschalter
StandardsIEC/EN 60947-5-1, IEC/EN 60947-1
Compliance with the Directives (Y/N) Yes
Suitable for safety functions (Y/N)No
suitable for exterior use (Y/N)Yes
Climatic stressIEC/EN 60068-2-20
MountingKnurled nut
Mounting positionarbitrarily
- Material of the front ringAluminium - anodized
- Material of the bellowsSilicone
Material thickness of the sealing bellows2
- Colour of the bellowsGrey
- Colour of the front ringSilver
Locking sleeve (Y/N)Yes
Mechanical data
Design of electrical connectionScrew connection
Cable section
- Min. Cable section0,5
- Max. Cable section2.5
Mechanical life10.000.000 operations
Switching frequency1200 S
noticeAll indications about the cable section are including the conductor ferrules.
Actuating force11
restistance to shock110 / 4 - 30 / 18
Resistance to vibration> 20 / 10 … 200
Latching (Y/N)Yes
Probing possible (Y/N)No
Return to zero position (Y/N)No
Latching positionleft and right zero position
Number of switch positions2
- Position A, B
Number of directions2
Front plate thickness
- min. front plate thickness1.5
- max. front plate thickness6
Ambient conditions
Ambient temperature
- Min. environmental temperature−40
- Max. environmental temperature+80
Protection classIP67 to IEC/EN 60529
IP69K to DIN 40050-9
Degree of pollution3 IEC/EN 60947-1
Electrical data
Design of control element2 Normally open contact (NO) / 2 Normally open contact (NO)
Switching principleCreep circuit element
Number of auxiliary contacts4
Number of safety contacts0
Rated impulse withstand voltage4
Rated insulation voltage400
Thermal test current10 A
Utilisation categoryAC-15: 250 V / 8 A
DC-13: 24 V / 5 A
Max. fuse rating10 A gG D-fuse
- galvanically separated contact bridgesYes
Contacts at position
- A2 Normally open contact (NO)
- B2 Normally open contact (NO)
- C-
- D-
Number of switching stages2
Number of shutters per direction2
Explosion protection categories for gasesNone
Explosion protected category for dustsNone
- Length of the actuator77
- Mounting depth104
Hole of central anchorage, diameter22.7
Mounting hole IEC/EN 60947-122.3 + 0,4
Spacing80 x 80

K.A. Schmersal GmbH & Co. KG, Möddinghofe 30, D-42279 Wuppertal
The data and values have been checked throroughly. Technical modifications and errors excepted.
Generiert am 18.09.2019 - 01:09:21h Kasbase 3.3.0.F.64I