3 Phase Sockets

Three phase sockets can have an earth pin of a larger diameter than the socket type, and located in a different position depending on the voltage rating, making it impossible to mate, for instance, a blue plug with a yellow socket. For example, a 16 A 3P+E 400 V plug will not connect to a 16 A 3P+N+E 400 V socket and a 16 A P+N+E 230 V plug will not mate with a 32 A P+N+E 230 V socket. 

Three phase sockets have round 4-pins + earth connectors, connected to 5 wires: 3 live wires + neutral + earth. Voltage and other socket characteristics are represented by colour coding.


Our broad selection of quality three-phase sockets include a variety of durable industrial cable mount plugs, designed around reliability and simplicity of use. RS PRO 3-phase sockets use toughened casings for better strength and stability, and are quick and easy to assemble in a wide range of work environments.

We also stock three phase sockets from an array of other leading electrical engineering component manufacturers, including ABB, Bals, Hirschmann, ITT Cannon, Legrand, Mennekes, and Merlin Gerin.

What are the key features of a quality 3 phase socket?

In addition to robust construction in high-grade materials, further benefits you may wish to look for when buying a three-phase socket might include:

  • Ingress protection (IP) ratings of IP44 (splash-proof) or above, for better resistance to environmental moisture and dirt
  • High thermal stability and mechanical strength
  • Halogen-free plastics with self-extinguishing function in the event of combustion
  • Seals and o-rings made from sturdy rubber in advanced-formula compounds, such as non-aging EPDM elastomer
  • Nickel-plated brass contacts for an optimally reliable connection
  • Enhanced corrosion and abrasion resistance

What are some typical applications of a three-phase socket?

These components are widely used across a variety of industries and sectors. Common uses include on a range of construction sites and manual work zones; in numerous agricultural settings for powering electrical appliances stored in barns and sheds; for multiple types of sports and entertainment events requiring dependable lighting and power delivery; and on many workshop/garage floors or commercial premises.


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Description Price Current Rating Plug/Socket Pole Format Voltage Rating Hazardous Area Certification Mounting Type IP Rating Colour Gender Body Orientation Termination Method Series Cable CSA Maximum Operating Temperature
RS Stock No. 464-6240
Mfr. Part No.4
BrandMENNEKES
£22.82
Each
Units
32.0A Plug 5P 400 V - Cable Mount IP44 Red Male Straight Screw Terminal AM-TOP 2.5 → 6mm² +55°C
RS Stock No. 464-6206
Mfr. Part No.3
BrandMENNEKES
£17.92
Each
Units
16.0A Plug 5P 400 V - Cable Mount IP44 Red Male Straight Screw Terminal AM-TOP 1 → 2.5mm² +55°C
RS Stock No. 679-6895
Mfr. Part No.3325RS
BrandMENNEKES
£69.44
Each
Units
63.0A Plug 5P 400 V - Cable Mount IP67 Red Male Straight Screw Terminal PowerTOP Plus 6 → 16mm² +40°C
RS Stock No. 679-6892
Mfr. Part No.3258RS
BrandMENNEKES
£61.45
Each
Units
63.0A Plug 5P 400 V - Cable Mount IP44 Red Male Straight Screw Terminal PowerTOP Plus 6 → 16mm² +40°C
RS Stock No. 467-8449
Mfr. Part No.322
BrandMENNEKES
£51.45
Each
Units
32.0A Plug 5P 400 V - Cable Mount IP44 Red Male Straight Screw Terminal - 2.5 → 6mm² +55°C
RS Stock No. 464-6335
Mfr. Part No.6
BrandMENNEKES
£28.93
Each
Units
32.0A Socket 5P 400 V - Cable Mount IP44 Red Female Straight Screw Terminal AM-TOP 2.5 → 6mm² +55°C
RS Stock No. 464-6199
Mfr. Part No.252
BrandMENNEKES
£15.95
Each
Units
16.0A Plug 4P 400 V - Cable Mount IP44 Red Male Straight Screw Terminal AM-TOP 1 → 2.5mm² +55°C
RS Stock No. 236-0023
Mfr. Part No.3853
BrandMENNEKES
£43.33
Each
Units
32.0A Plug 5P 400 V - Cable Mount IP67 Red Male Straight Screw Terminal PowerTOP 2.5 → 6mm² +55°C
RS Stock No. 111-5542
Mfr. Part No.940009
BrandMENNEKES
£816.49
Each
Units
16 A, 32 A, 63 A - - 230 V, 400 V - - - - - - - - - -
RS Stock No. 679-6928
Mfr. Part No.3381RS
BrandMENNEKES
£214.81
Each
Units
125.0A Plug 5P 400 V - Cable Mount IP67 Red Male Straight Screw Terminal PowerTOP Plus 25 → 50mm² +40°C
RS Stock No. 679-6899
Mfr. Part No.3425
BrandMENNEKES
£90.32
Each
Units
63.0A Socket 5P 400 V - Cable Mount IP67 Red Female Straight Screw Terminal PowerTOP Plus 6 → 16mm² +40°C
RS Stock No. 236-0405
Mfr. Part No.3976
BrandMENNEKES
£27.58
Each
Units
32.0A Socket 5P 400 V - Cable Mount IP44 Red Female Straight Screw Terminal PowerTOP 2.5 → 6mm² +55°C
RS Stock No. 679-6902
Mfr. Part No.3308RS
BrandMENNEKES
£65.65
Each
Units
63.0A Plug 4P 400 V - Cable Mount IP67 Red Male Straight Screw Terminal PowerTOP Plus 6 → 16mm² +40°C
RS Stock No. 492-5981
Mfr. Part No.300
BrandMENNEKES
£46.09
Each
Units
32.0A Plug 5P 400 V - Cable Mount IP67 Red Male Straight Screw Terminal AM-TOP 2.5 → 6mm² +55°C
RS Stock No. 236-0045
Mfr. Part No.3821
BrandMENNEKES
£29.74
Each
Units
16.0A Plug 5P 400 V - Cable Mount IP67 Red Male Straight Screw Terminal PowerTOP 1 → 2.5mm² +55°C
RS Stock No. 464-1419
Mfr. Part No.105
BrandMENNEKES
£19.75
Each
Units
16.0A Socket 4P 400 V - Wall Mount IP44 Red Female 25 ° Screw Terminal - 1.5 → 4mm² +55°C
RS Stock No. 464-6234
Mfr. Part No.264
BrandMENNEKES
£21.53
Each
Units
32.0A Plug 4P 400 V - Cable Mount IP44 Red Male Straight Screw Terminal AM-TOP 2.5 → 6mm² +55°C
RS Stock No. 492-5852
Mfr. Part No.282
BrandMENNEKES
£33.03
Each
Units
16.0A Plug 4P 400 V - Cable Mount IP67 Red Male Straight Screw Terminal AM-TOP 1 → 2.5mm² +55°C
RS Stock No. 236-0427
Mfr. Part No.3907
BrandMENNEKES
£51.57
Each
Units
32.0A Socket 5P 400 V - Cable Mount IP67 Red Female Straight Screw Terminal PowerTOP 2.5 → 6mm² +55°C
RS Stock No. 187-1128
Mfr. Part No.354
BrandMENNEKES
£48.46
Each
Units
32.0A Plug 5P 400 V - Wall Mount IP44 Red Male 25 ° Screw Terminal - 2.5 → 6mm² +55°C