Double Pole Isolators

2-pole or double-pole isolators are a type of isolator switch - that is, a switching device designed and installed so as to allow the user to power down (or ‘isolate’) a specific device or part of a circuit for servicing, maintenance and testing purposes. (Note that non-fused switch disconnectors of this type aren’t intended for use as a core part of the wider circuit, but instead are meant to provide an additional safety device.)


Among our top-rated suppliers of 2 pole isolator switches are such trusted brands as Merlin Gerin, Schneider Electric, ABB, Eaton, Kraus & Naimer, and our brand RS PRO range.

What are double pole isolators used for?

Non-fused switch disconnectors are designed to isolate circuit breakers, transmission lines and transformers as part of standard maintenance processes or troubleshooting applications. Unlike fused switch disconnectors, they rely on either a rotary or knife-blade disconnect method, as opposed to using a fuse to break the given circuit:

  • Rotary switches break the circuit through rotation of a lever
  • Knife-blade switches use a hinge to lift a lever off its slot, with the same end result of disconnecting or isolating a particular component or section of the circuit

Double pole isolators can prove important devices in the event that a hard-wired appliance develops a neutral-earth fault, enabling the user to power down the faulty equipment easily and safely before restoring power to non-faulty devices and circuits once the RCD trip has been reset.

Double pole isolator switches feature a pair of mechanically coupled switches, covering both live and neutral legs of the connection:

  • This means that complete separation of the relevant circuit can be achieved, as opposed to single-pole switches which would leave the neutral still connected and earthed
  • 2, 3- or 4-pole isolators are therefore typically found on many types of appliances and circuits that need to be isolated for testing and maintenance purposes, as opposed to devices or circuits requiring only functional state switching (such as domestic lights)

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Description Price Number of Poles Maximum Current Model Number Range Mounting Type Series Normal State Configuration Power Rating IP Rating Accepts Padlocks Voltage Rating Auxiliary Contacts Available Electrical Phase Switch Rating
RS Stock No. 466-251
BrandRS PRO
£5.47
Each
Units
2 16 A - - DIN Rail - NO/NC - IP65 No - - 1 -
RS Stock No. 860-9554
BrandRS PRO
£58.82
Each
Units
2 25 A - - Enclosed - - 15 kW IP65 Yes 500 V - - 30 kA
RS Stock No. 860-9557
BrandRS PRO
£79.34
Each
Units
2 32 A - - DIN Rail - - 15 kW IP65 Yes 690 V - - 30 kA
RS Stock No. 860-9551
BrandRS PRO
£114.51
Each
Units
2 40 A - - DIN Rail - - 18.5 kW IP65 Yes 690 V - - 30 kA
RS Stock No. 136-5288
BrandRS PRO
£69.44
Each
Units
2 63 A - - Panel Mount - CO - IP65 Yes 415 V ac - 3 -
RS Stock No. 257-9384
Mfr. Part No.T0-1-102/EA/SVB
BrandEaton
£23.11
Each
Units
2 20 A - - Panel Mount - NO 6.5 kW IP65 Yes 440 V ac Yes 1 320 A
RS Stock No. 330-7988
Mfr. Part No.T0-1-102/I1/SVB
BrandEaton
£25.78
Each
Units
2 20 A - - Enclosed - NO 6.5 kW IP65 Yes 440 V ac Yes 1 320 A
RS Stock No. 257-9441
Mfr. Part No.T3-1-102/EA/SVB
BrandEaton
£32.85
Each
Units
2 32 A - - Panel Mount - NO 13 kW IP65 Yes 440 V ac Yes 1 32 A
RS Stock No. 629-2025
Mfr. Part No.T0-1-102/I1H/SVB
BrandEaton
£25.78
1 Box of 1
Box(es)
2 20 A ac - - Enclosed - - 13 kW IP65 Yes 400 V ac - 3 20 A
RS Stock No. 393-9721
Mfr. Part No.T3-1-102/I2H/SVB+K-CI-K2
BrandEaton
£41.16
Each
Units
2 32 A - - Enclosed - - 13 kW IP65 Yes 400 V ac - 1 -
RS Stock No. 629-2097
Mfr. Part No.T0-1-102/I1H/K-CI-K1/2
BrandEaton
£20.10
1 Box of 1
Box(es)
2 20 A - - Enclosed - 2NO - IP65 - 690 V ac - 1 6000 V
RS Stock No. 727-1486
Mfr. Part No.2CMA142435R1000
BrandABB
£97.27
Each
Units
2 25 A - - Enclosed - - 7.5 kW IP65 - 400 V ac - 1 690 V ac
RS Stock No. 892-9482
Mfr. Part No.WS102
BrandWylex
£11.06
Each
Units
2 100 A - - DIN Rail - - - - - - - - -
RS Stock No. 790-7434
Mfr. Part No.A9S60220
£14.06
Each
Units
2 20 A - Acti 9 DIN Rail iSW 2NO - IP40 - 415 V Yes - 4 kV
RS Stock No. 828-5319
Mfr. Part No.KH85 T902/GBA012 *KL72
£177.12
Each
Units
2 100 A - - Enclosed - NO 10 kW, 11 kW IP66, IP67 Yes 220 → 240 V Yes 1 -
RS Stock No. 922-0878
Mfr. Part No.ONE20M2Y
BrandABB
£15.88
Each
Units
2 20 A - - Panel Mount ONE20 - - - - 240 V - - -
RS Stock No. 790-7447
Mfr. Part No.A9S60232
£14.16
Each
Units
2 32 A - Acti 9 DIN Rail iSW 2NO - IP40 - 415 V ac Yes - 4 kV
RS Stock No. 330-8010
Mfr. Part No.T3-1-102/I2/SVB
BrandEaton
£41.16
Each
Units
2 32 A - - Enclosed - NO 13 kW IP65 Yes 440 V ac Yes 1 650 A
RS Stock No. 790-7440
Mfr. Part No.A9S65240
£20.82
Each
Units
2 40 A - Acti 9 DIN Rail iSW 2NO - IP20 - 415 V - - 6 kV
RS Stock No. 828-5316
Mfr. Part No.KH63 T902/GBA002 *KL72
£102.01
Each
Units
2 63 A - - Enclosed - NO 11 kW, 18.5 kW IP66, IP67 Yes 220 240 V Yes 1 -