Easter Opening Hours and Delivery Dates here

Block Control Panel Transformers Control transformer 618821

Block Brand: Block
The Block transformers are reliable electrical components designed for low inrush current applications, available in various power ratings and configurations to suit diverse requirements.
Description Image Product Buy Pricing (Ex VAT) Secondary Voltages Power Rating Height Length Width Dimensions Efficiency No of Outputs Standards Type Primary Voltages Connection Frequency Insulation class Max. ambient temperature Mounting Type Number of Inputs Protection Class Test mark
Block STU 100/2x115 Transformer 100 VA Low Inrush Screw Terminals
Block STU 100/2x115 Transformer 100 VA Low Inrush Screw Terminals
Extended range
Order code: 01-6427
MPN: STU 100/2x115

6 available to back orderBack-order availability date - 18/04/2026
1+ £52.86
Price per unit Ex VAT 		2 x 115 V AC, 230 V AC 100VA 94mm 90mm 84mm (L x W x H) 90 x 84 x 94 mm 86% 2 VDE 0570 Part 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized
Block STU 1000/2x115 Transformer 1000VA Low Inrush Screw Terminals
Block STU 1000/2x115 Transformer 1000VA Low Inrush Screw Terminals
Extended range
Order code: 01-6428
MPN: STU 1000/2x115

2 available to back orderBack-order availability date - 18/04/2026
1+ £186.60
Price per unit Ex VAT 		2 x 115 V AC, 230 V AC 1000VA 149mm 156mm 150mm (L x W x H) 156 x 150 x 149 mm 94% 2 VDE 0570 Part 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized
Block STU 160/24 Transformer 210-540V AC to 24V AC Low Inrush 160VA
Block STU 160/24 Transformer 210-540V AC to 24V AC Low Inrush 160VA
Extended range
Order code: 01-6429
MPN: STU 160/24

3 available to back orderBack-order availability date - 18/04/2026
1+ £60.14
Price per unit Ex VAT 		1 x 24 V AC 160VA 105mm 88mm 96mm (L x W x H) 88 x 96 x 105 mm 87% 1 VDE 0570 Part 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized
Block STU 160/2x115 Transformer 100VA Low Inrush Safety Isolation
Block STU 160/2x115 Transformer 100VA Low Inrush Safety Isolation
Extended range
Order code: 01-6430
MPN: STU 160/2x115

6 available to back orderBack-order availability date - 18/04/2026
1+ £62.77
Price per unit Ex VAT 		2 x 115 V AC, 230 V AC 100VA 105mm 92mm 96mm (L x W x H) 92 x 96 x 105 mm 87% 2 VDE 0570 Part 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized
Block STU 1600/2x115 Transformer 1600VA Low Inrush Screw Terminals
Block STU 1600/2x115 Transformer 1600VA Low Inrush Screw Terminals
Extended range
Order code: 01-6431
MPN: STU 1600/2x115

4 available to back orderBack-order availability date - 18/04/2026
1+ £292.39
Price per unit Ex VAT 		2 x 115 V AC, 230 V AC 1600VA 182mm 146mm 192mm (L x W x H) 146 x 192 x 182 mm 94% 2 VDE 0570 Part 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized
Block STU 2000/2x115 Current Transformer 2000 VA 115-540 V AC
Block STU 2000/2x115 Current Transformer 2000 VA 115-540 V AC
Extended range
Order code: 01-6432
MPN: STU 2000/2x115

2 available to back orderBack-order availability date - 18/04/2026
1+ £321.02
Price per unit Ex VAT 		2 x 115 V AC, 230 V AC 2000VA 182mm 183mm 192mm (L x W x H) 183 x 192 x 182 mm 95% 2 VDE 0570 Part 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized
Block STU 250/2x115 Transformer 250VA Low Inrush Screw Terminals
Block STU 250/2x115 Transformer 250VA Low Inrush Screw Terminals
Extended range
Order code: 01-6433
MPN: STU 250/2x115

5 available to back orderBack-order availability date - 18/04/2026
1+ £76.92
Price per unit Ex VAT 		2 x 115 V AC, 230 V AC 250VA 123mm 92mm 120mm (L x W x H) 92 x 120 x 123 mm 90% 2 VDE 0570 Part 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized
Block STU 400/24 Transformer: 1x210-540V AC Low Inrush Current Safe
Block STU 400/24 Transformer: 1x210-540V AC Low Inrush Current Safe
Extended range
Order code: 01-6434
MPN: STU 400/24

Available to back orderBack order, lead time 4 weeks
1+ £104.79
Price per unit Ex VAT 		1 x 24 V AC 400VA 123mm 102mm 120mm (L x W x H) 102 x 120 x 123 mm 91% 1 VDE 0570 Part 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized
Block STU 500/24 Transformer Safety & Isolation 1x24V AC 500 VA
Block STU 500/24 Transformer Safety & Isolation 1x24V AC 500 VA
Extended range
Order code: 01-6435
MPN: STU 500/24

Available to back order
1+ £116.70
Price per unit Ex VAT 		1 x 24 V AC 500VA 126mm 122mm 150mm (L x W x H) 122 x 150 x 126 mm 91% 1 VDE 0570 Part 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized
Block STU 500/2x115 Isolation Transformer Low Inrush 115V/230V 500VA
Block STU 500/2x115 Isolation Transformer Low Inrush 115V/230V 500VA
Extended range
Order code: 01-6436
MPN: STU 500/2x115

Available to back orderBack order, lead time 3 weeks
1+ £116.70
Price per unit Ex VAT 		2 x 115 V AC, 230 V AC 500VA 123mm 124mm 120mm (L x W x H) 124 x 120 x 123 mm 91% 2 VDE 0570 Part 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized
Block STU 63/24 Control/Safety Transformer 63 VA 1x24VAC Low Inrush
Block STU 63/24 Control/Safety Transformer 63 VA 1x24VAC Low Inrush
Extended range
Order code: 01-6437
MPN: STU 63/24

8 available to back orderBack-order availability date - 18/04/2026
1+ £49.39
Price per unit Ex VAT 		1 x 24 V AC 63VA 95mm 70mm 84mm (L x W x H) 70 x 84 x 95 mm 84% 1 VDE 0570 Part 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No.66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized
Block STU 630/2x115 Transformer Low Inrush Safety Isolation 630 VA
Block STU 630/2x115 Transformer Low Inrush Safety Isolation 630 VA
Extended range
Order code: 01-6438
MPN: STU 630/2x115

6 available to back orderBack-order availability date - 18/04/2026
1+ £136.05
Price per unit Ex VAT 		2 x 115 V AC, 230 V AC 630VA 149mm 112mm 150mm (L x W x H) 112 x 150 x 149 mm 92% 2 VDE 0570 PART 2-4, DIN EN 61558-2-2, EN 61558-2-2, IEC 61558-2-4, UL 5085-1/-2, CSA 22.2 No. 66 Open 1 x 210 V AC, 230 V AC, 250 V AC, 380 V AC, 400 V AC, 420 V AC, 440 V AC, 460 V AC, 480 V AC, 500 V AC, 520 V AC, 540 V AC Screw terminal 50 - 60Hz VDE = B, UL = class 105 +40°C Base plate 1 I cULus recognized


Trustpilot