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Block EL Safety Isolating Transformers 2 x 9V

Block Brand: Block

The Block EL Safety Isolating Transformers 2 x 9V are ideal for the safe electrical isolation of the input and output sides. The transformers are suitable for creating SELV and PELV circuits because of the limit on the output voltage. Well designed using safety coil bobbin in 2-chamber technology, featuring a mechanically protected winding wire feature in the coil bobbin, plus very good corrosion protection and low noise thanks to BLOCKIMPEX vacuum impregnation.

  • Solder tab for free wiring
  • Coil shell in 2-chamber technology
  • Simple mounting with robust metal footplate with oval slots
Description Image Product Buy Pricing (Ex VAT) Power Rating Height Length Width Primary Voltages Secondary Voltage
Block EL 18/9, 18VA Transformer, 2 x 9V
Block EL 18/9, 18VA Transformer, 2 x 9V
Extended range
Order code: 51-5343
MPN: EL 18/9

2 available to back orderBack-order availability date - 30/01/2026
1+ £19.55
Price per unit Ex VAT 		18VA 55mm 60mm 47mm 230V 2 x 9V
Block EL 28/9, 28VA Transformer, 2 x 9V
Block EL 28/9, 28VA Transformer, 2 x 9V
Extended range
Order code: 51-5348
MPN: EL 28/9

1 available to back orderBack-order availability date - 30/01/2026
1+ £23.50
Price per unit Ex VAT 		28VA 55mm 60mm 56mm 230V 2 x 9V
Block EL 50/9, 50VA Transformer, 2 x 9V
Block EL 50/9, 50VA Transformer, 2 x 9V
Extended range
Order code: 51-5353
MPN: EL 50/9

4 available to back orderBack-order availability date - 30/01/2026
1+ £35.43
Price per unit Ex VAT 		50VA 67mm 75mm 59mm 230V 2 x 9V
Block EL 100/9, 100VA Transformer, 2 x 9V
Block EL 100/9, 100VA Transformer, 2 x 9V
Extended range
Order code: 51-5334
MPN: EL 100/9

4 available to back orderBack-order availability date - 30/01/2026
1+ £47.61
Price per unit Ex VAT 		100VA 76mm 84mm 80mm 230V 2 x 9V
Order code51-535851-534351-534851-535351-5334
Ambient temperature range+40°C (max)+40°C (max)+40°C (max)+40°C (max)+40°C (max)
ConstructionOpenOpenOpenOpenOpen
Efficiency62%72%77%81%88%
FixingBase plateBase plateBase plateBase plateBase plate
Fixing typeM3 screwsM3 screwsM3 screwsM4 screwsM4 screws
Frequency50-60Hz50-60Hz50-60Hz50-60Hz50-60Hz
Power7.5VA18VA28VA50VA100VA
Primary voltage230V230V230V230V230V
Secondary current616mA1A1.56A2.78A5.56A
Secondary voltage2 x 9V2 x 9V2 x 9V2 x 9V2 x 9V
Test voltage4000V4000V4000V4000V4000V
TypeEL 7.5/9EL 18/9EL 28/9EL 50/9EL 100/9


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