Metway 503SI Series 3-pole Fused Terminal Blocks for 20 x 5mm Fuses

Metway Brand: Metway

These 3-way terminal blocks from Metway's 503SI series have a built-in 20 x 5mm fuse holder.

  • Fuse size 20 x 5mm
  • Current ratings: fuse holder : 10A; terminal block: 16A
  • Voltage ratings: fuse holder: 250V; terminal block: 380V
  • Conductor size: 6mm² (without wire protectors); 2.5mm² (with wire protectors)
  • Body moulding: UL94 V2 rated grey nylon 6.6 (PA6/6)
  • VDE and UL approved
  • Metway 503SI series
Description Image Product Buy Pricing (Ex VAT) Type Number of Positions Fuse Size Pitch Body Style Current Rating Mounting Number of Ways Series Termination Wire Gauge
Metway 503SI03E 20 x 5mm Fused Terminal Block
Metway 503SI03E 20 x 5mm Fused Terminal Block
Standard range
Order code: 21-0720
MPN: 503SI03E

1,192 in stock, despatched same dayAdditional 1,000 due on 18/03/2026
1+ £2.02
10+ £1.50
100+ £1.19
Price per unit Ex VAT 		Fused Terminal Block 3 20 x 5mm 10mm Fused terminal block 10A Screw 3 503SI Screw 22 to 12AWG
Metway 503SI03EDS 20 x 5mm Fused Earthed Terminal Block with Wire Protector
Metway 503SI03EDS 20 x 5mm Fused Earthed Terminal Block with Wire Protector
Standard range
Order code: 21-0722
MPN: 503SI03EDS

10 in stock, despatched same dayAdditional quantity lead time 4 weeks
1+ £1.98
10+ £1.66
100+ £1.26
Price per unit Ex VAT 		Fused Terminal Block 3 20 x 5mm 10mm Fused terminal block 10A Screw 3 503SI Screw 22 to 12AWG
Metway typeEarth connectionWire protectorsOrder code
503SI03EYesNo21-0720
503SI03DSNoYes21-0721
503SI03EDSYesYes21-0722


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