Auxiliary contact block TeSys LA1SK

TeSys SK Power Add on Block, 1 NO Power, 1 NO SignAlling

Catalogue Number: LA1SK10
Auxiliary contact block TeSys LA1SK
RRP (Inc. GST)


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Range of product
TeSys SK
Product or component type
power add-on block
Device short name
Utilisation category
  • AC-1
  • AC-3
    • Poles description
      Pole contact composition
      1 NO
      [Ue] rated operational voltage
    • signalling circuit: 690 V AC <= 400 Hz
    • power circuit: 690 V AC 50/60 Hz
      • [Ie] rated operational current
      • 6 A at <= 440 V AC AC-3 for power circuit
      • 12 A (at <55 °C) AC AC-1 for power circuit
        • Auxiliary contact composition
          1 NO
          [Ith] conventional free air thermal current
        • 12 A (at 55 °C) for power circuit
        • 10 A (at 55 °C) for signalling circuit
          • Irms rated making capacity
          • 66 A at 690 V AC conforming to IEC 60947
          • 66 A at 690 V AC conforming to NF C 63-110
            • [Icw] rated short-time withstand current
              50 A 55 °C for power circuit
              Associated fuse rating
              10 A gI for signalling circuit conforming to VDE 0660
              [Ui] rated insulation voltage
            • 690 V conforming to IEC 60947
            • 690 V conforming to VDE 0110 group C
            • 690 V conforming to BS 5424
            • 690 V conforming to UL 508
            • 690 V conforming to CSA C22.2 No 14
              • Standards
              • IEC 60947
              • VDE 0660
              • NF C 63-110
              • BS 5424
                • Product certifications
                • UL
                • CSA
                  • Connections - terminals
                  • connector 1 cable(s) 0.35-6 mm²flexible with cable end
                  • connector 1 cable(s) 0.5-6 mm²flexible without cable end
                  • connector 1 cable(s) 1.5-6 mm²solid
                  • connector 2 cable(s) 0.35-1.5 mm²flexible with cable end
                  • connector 2 cable(s) 0.35-2.5 mm²flexible without cable end
                  • connector 2 cable(s) 1.5-4 mm²solid
                    • Tightening torque
                      0.8 N.m - on connector - with screwdriver pozidriv No 1
                      Signalling circuit frequency
                      <= 400 Hz
                      Net weight
                      0.022 kg
                      Compatibility code
                      IP degree of protection
                      IP2x conforming to VDE 0106
                      Protective treatment
                    • TC conforming to IEC 60068
                    • TC conforming to DIN 50015
                      • Ambient air temperature for operation
                        -20-50 °C
                        Ambient air temperature for storage
                        -50-70 °C
                        Operating altitude
                        2000 m without
                        Sustainable offer status
                        Green Premium product
                        EU RoHS Directive
                        Mercury free
                        RoHS exemption information
                        China RoHS Regulation
                        Product out of China RoHS scope. Substance declaration for your information
                        Environmental Disclosure
                        The product must be disposed on European Union markets following specific waste collection and never end up in rubbish bins
                        18 months

                        Documents & downloads

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                        Frequently Asked Questions

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                        Why will LA1SK11 adder deck not fit on CA2SK11 relay?

                        Why will LA1SK11 adder deck not fit on CA2SK11 relay?

                        Product Line:
                        Tesys Relays

                        All Products

                        Product Features

                        No, LA1SK11 mounts only on the CA2SK20 relay.

                        CTA-ID : 2014524

                        Can the old D-line front mount attachments fit on the new CAD relays?

                        Can the old D-line attachments fit the new CAD relays
                        Product Line:
                        IEC Contactors

                        Tesys D contactors and relays
                        Using old accessories with new CAD relays

                         Yes, the old style front mount latch attachments, timing attachments, and auxiliary contacts will mount on the new Tesys D-line relays.

                        What is the replacement for a LA6DK10B

                         Part code is LAD6K10B

                        Why does my other equiptment trip when my contactor releases?

                        The colapsing coil voltage on DC is causing a Back EMF (electro magnetic field) issue. This is solved with either a varistor LA4SKE1E or a Diode LA4SKC1U on the LP1K09 contactor.

                        For further information please visit

                        What is the replacement for LA1DN20 Contact Block?

                        The replacement for LA1DN20 Contact Block is LADN20

                        TeSys D - auxiliary contact block - 2 NO - screw-clamps terminals 
                        For more information see;

                        Can the single pole LA1DN and LADN auxiliary contact module be mounted on the TeSys contactors?

                        Can the single pole LA1DN and LADN auxiliary contact module be mounted on the TeSys contactors?
                        PRODUCT LINE
                        Auxiliary contacts for the Tesys D line
                        Tesys D-Line and Tesys F
                        These contacts will only fit on the following contactors:
                        Front mount only for LC1D40 through LC1D115 devices and LC1D40A - LC1D65A.
                        Left side mount only to LC1F contactors
                        CTA-ID : 2002751

                        What is the part number for the shaft only for the D10 switches?

                        Shaft for D10 switch.

                        Product Line: 
                        Operating Mechanism & Disconnect Switches

                        D10 switches

                        There are three shaft part numbers to choose from.

                        For enclosure depth of 5 5/8 inches - 6 inches is 50132-001-53
                        For enclosure depth of 6 inches - 10 inches is D11SH10 (obsolete, see D11SH16)
                        For enclosure depth 10 inches - 16 inches is D11SH16. 


                        What is the part number for the replacement coil for the CA2SK11 relays?

                        Customer needs a replacement coil for the CA2SK11 relay.

                        Product Line:
                        TeSys SK IEC Style Relays              

                        IEC Style Industrial Control Relays

                        Clarify if customer can order new coil or replace entire relay

                        Coil is not a replaceable part.

                        Is the LAD7B10 a UL and CSA Recognized Component?

                        Is the LAD7B10 a UL or CSA recognized component?

                        Product Line:
                        IEC Overload Mounting Kit

                        IEC Contactors

                        Clarify CSA and UL listing for IEC components

                        As of 6/30/2016 this device has been UL component recongnized. This device has not been CSA recognized

                        Key words LAD7B10, UL, CSA, separate mounting

                        Case Subject:

                        What is the replacement AC coil for CAD32 and CAD50 relay?

                        AC coil replacement for CAD32 and CAD50

                        Product Line:

                        Tesys CAD Control Relays

                        Product selection

                        Volt = coil part number
                        12 = LXD1J7
                        21 = LXD1Z7
                        24 = LXD1B7
                        32 = LXD1C7
                        36 = LXD1CC7
                        42 = LXD1D7
                        48 = LXD1E7
                        60 = LXD1EE7
                        100 = LXD1K7
                        110 = LXD1F7
                        115 = LXD1FE7
                        120 = LXD1G7
                        127 = LXD1FC7
                        200 = LXD1L7
                        208 = LXD1LL7
                        220/230 = LXD1M7
                        230 595 21 LXD1P7
                        230/240 = LXD1U7
                        277 781 30 LXD1W7
                        380/400 = LXD1Q7
                        400 = LXD1V7
                        415 = LXD1N7
                        440 = LXD1R7
                        480 = LXD1T7
                        600 = LXD1X7
                        690 = LXD1Y7


                        What is the maximum DC voltage per pole for TeSys D range contactors.

                        The maximum DC voltage for TeSys D range contactor is 75 Volt per pole. This voltage is applicable for the specification of L/R <= 15ms in DC applications.

                        The LU9BC11 module is obsolete what can we replace it with?

                        Product Line:  
                        Tesys U line accessories
                        The LU9BC11 with a LUA1C110 makes up the LUA1C11 block. We can no longer get it in two pieces and have to order as one part number, LUA1C11.
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