Distribution Blocks

The primary function of a distribution block is to supply power more efficiently to a series of devices. The secondary function is to isolate short circuit incidents to prevent complete shutdown from occurring. Distribution blocks can handle a range of frequencies and currents. Using distribution blocks requires only one large wire on the input side to link each connected device back to the power source. This eliminates the need for separate wiring of each device. 


What are distribution blocks used for?

Distribution blocks are used in various industries:

  • Heating/cooling for operating heaters, cooling systems and ventilation equipment.
  • Power distribution control in the form of voltage transformers, uninterrupted power supply units and distribution cabinets. 
  • Solar, wind and turbine as the power supply to distribute energy.
  • Electrical vehicles for charging stations.
  • Electronic automation, including elevators, lifting equipment and conveyor systems.

Types of distribution blocks

The two main types of distribution block are:

  • Bussed (enclosed) blocks, which allow for a larger input cable to be split out into smaller cables for branch circuits.
  • Independent blocks, which enable multiple individual circuits to be routed to a single location as they are not connected to each other.

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Description Price Number of Ways Termination Method Wire Size Housing Material IP Rating Current Rating Voltage Rating Cable CSA Length Width Height Colour Maximum Operating Temperature Minimum Operating Temperature
RS Stock No. 277-9815
Mfr. Part No.0 048 34
BrandLegrand
TWD518
Each
units
13 Screw Down - PC IP20 100A 400 V ac 1.5 → 16 mm², 6 → 25 mm² 113mm - - Green +40°C -5°C
RS Stock No. 277-9837
Mfr. Part No.0 048 36
BrandLegrand
TWD1,023
Each
units
22 Screw Down - PC IP20 100A 400 V ac 1.5 → 16 mm², 6 → 25 mm² 176mm - - Green +40°C -5°C
RS Stock No. 138-3492
Mfr. Part No.1562100000
BrandWeidmuller
TWD2,083
1 Pack of 1
Pack(s)
2 (Input), 9 (Output) Screw 4 AWG Wemid - 200 (UR) A, 250 A 1 kV ac, 1.5 kV dc, 600 V 16 mm², 25 mm², 35 mm², 120 mm² 52.5mm 67mm 94mm Grey +130°C -50°C
RS Stock No. 138-3493
Mfr. Part No.1562090000
BrandWeidmuller
TWD2,131
1 Pack of 1
Pack(s)
2 (Input), 9 (Output) Screw 350 AWG Wemid - 310 (UR) A, 353 A 1 kV ac, 1.5 kV dc, 600 V 16 mm², 25 mm², 35 mm², 185 mm² 52.6mm 67mm 94mm Grey +130°C -50°C
RS Stock No. 100-3920
Mfr. Part No.1SNL312510R0000
BrandEntrelec
TWD633
Each
units
8 Screw Down 8 → 2 (End 1) AWG, 10 → 6 (End 1) AWG, 14 → 6 (End 2) AWG Polyamide IP20 125A 1 kV ac, 1.5 kV dc 2.5 → 16 (End 2) mm², 6 → 16 (End 1) mm², 10 → 35 (End 1) mm² 28.2mm 50.7mm 75mm Grey +110°C -55°C
RS Stock No. 441-4330
BrandRS Pro
TWD1,516
Each
units
12 Screw Down - PC - 160A 500 V 16 mm², 25 mm², 50 mm² 150mm 84mm 48mm Clear - -
RS Stock No. 383-1554
Mfr. Part No.1SNA115406R1300
BrandEntrelec
TWD99
Each
units
2 Clamp 12 AWG - - 32A 800 V 4mm² 14.5mm - 53mm Grey - -
RS Stock No. 239-5120
Mfr. Part No.7601.1101.1
BrandKopp
TWD609
Each
units
1 - - - - 16A - - - - - - - -
RS Stock No. 138-3502
Mfr. Part No.1561670000
BrandWeidmuller
TWD691
Each (In a Pack of 5)
units
2 (Input), 2 (Output) Screw 12 → 2 AWG Wemid - 125 (UR) A, 202 A 1 kV ac/dc, 600 V 25 mm², 35 mm² 22.2mm 49.3mm 55.4mm Green +130°C -50°C
RS Stock No. 868-0736
BrandRS Pro
TWD1,034
Each
units
26 Screw 35 mm² PC - - - - 99mm 40mm 43mm Blue +85°C -
RS Stock No. 138-3505
Mfr. Part No.1561780000
BrandWeidmuller
TWD933
Each (In a Pack of 3)
units
2 (Input), 2 (Output) Screw 8 AWG Wemid - 160 (UR) A, 300 A 1 kV ac/dc, 600 V 50 mm², 70 mm² 32.9mm 53.1mm 63mm Blue +130°C -50°C
RS Stock No. 868-0780
BrandRS Pro
TWD199
Each
units
- - - PC - - 250 V - 57mm 41.5mm 38mm Black +90°C -
RS Stock No. 837-1048
Mfr. Part No.1939490000
BrandWeidmuller
TWD1,973
Each
units
21 Screw 70 → 16 mm² Wemid - 175A 690 V - 80mm 42.5mm 71mm Beige +120°C -50°C
RS Stock No. 138-3487
Mfr. Part No.1562170000
BrandWeidmuller
TWD1,062
1 Pack of 1
Pack(s)
2 (Input), 5 (Output) Screw 12 → 2 AWG Wemid - 125A 1 kV ac/dc, 600 V 16 mm², 25 mm², 35 mm² 37.1mm 53.7mm 70mm Grey +130°C -50°C
RS Stock No. 277-2151
Mfr. Part No.0 048 24
BrandLegrand
TWD431
Each
units
13 Screw Down - PC - 100A 400 V ac 1.5 → 16 mm², 6 → 25 mm² 113mm - - - +40°C -5°C
RS Stock No. 383-1611
Mfr. Part No.1SNA115336R1300
BrandEntrelec
TWD1,075
Each
units
2 Clamp 6 AWG - - 200A 800 V 10-70 inputmm² 74mm - 56.7mm Grey - -
RS Stock No. 138-3507
Mfr. Part No.1561790000
BrandWeidmuller
TWD933
Each (In a Pack of 3)
units
2 (Input), 2 (Output) Screw 8 AWG Wemid - 160 (UR) A, 300 A 1 kV ac/dc, 600 V 50 mm², 70 mm² 32.9mm 53.1mm 63mm Green +130°C -50°C
RS Stock No. 138-3495
Mfr. Part No.1560670000
BrandWeidmuller
TWD319
Each (In a Pack of 5)
units
2 (Input), 2 (Output) Screw 14 → 4 AWG Wemid - 90 (UR) A, 152 A 1 kV ac/dc, 600 V 16 mm², 25 mm² 17.8mm 49.3mm 55.7mm Blue +130°C -50°C
RS Stock No. 138-3494
Mfr. Part No.1560730000
BrandWeidmuller
TWD319
Each (In a Pack of 5)
units
2 (Input), 2 (Output) Screw 14 → 4 AWG Wemid - 90 (UR) A, 152 A 1 kV ac/dc, 600 V 16 mm², 25 mm² 17.8mm 49.3mm 55.7mm Grey +130°C -50°C
RS Stock No. 138-3483
Mfr. Part No.1561910000
BrandWeidmuller
TWD417
Each (In a Pack of 3)
units
2 (Input), 6 (Output) Screw - Wemid - 100A 690 V ac/dc 10 mm², 25 mm² 30.2mm 49mm 55.4mm Grey +130°C -50°C