Block ST Transformer Range

Block Brand: Block

The BLOCK ST series offers a range of high-performance transformers designed for industrial and commercial applications. These transformers are engineered to provide reliable and efficient voltage conversion, ensuring optimal performance of electrical systems.

The ST series includes various models tailored to different power requirements, featuring robust construction and high-quality materials to withstand harsh operating conditions. With advanced thermal management and protection features, BLOCK ST transformers guarantee safe and stable operation, minimizing downtime and maintenance costs.

Easy to install and integrate, these transformers are ideal for use in automation, control systems, and other demanding environments where consistent power delivery is crucial.

Choose BLOCK ST products for their proven reliability, durability, and efficiency in powering your critical applications.

Description Image Product Buy Pricing (Ex VAT) Primary Voltages Secondary Voltages Power Rating Height Length Width Weight Power Type
Block ST 100/23/23, 100VA Transformer, 230V to 230V
Block ST 100/23/23, 100VA Transformer, 230V to 230V
Extended range
Order code: 51-5254
MPN: ST 100/23/23

Back order - 11 availableBack-order availability date - 07/10/2026
1+ £45.89
Price per unit Ex VAT 		230V 230V 100VA 95mm 84mm 76mm 2kg Isolation Transformer
Block ST 1000/23/23, 1000VA Transformer, 230V to 230V
Block ST 1000/23/23, 1000VA Transformer, 230V to 230V
Extended range
Order code: 51-5258
MPN: ST 1000/23/23

Back order - 6 availableBack-order availability date - 07/10/2026
1+ £221.65
Price per unit Ex VAT 		230V 230V 1000VA 148mm 150mm 154mm 13.5kg 1000va Isolation Transformer
Block ST 130/23/24, 130VA Transformer, 230V to 24V
Block ST 130/23/24, 130VA Transformer, 230V to 24V
Extended range
Order code: 51-5261
MPN: ST 130/23/24

Back order - 5 availableBack-order availability date - 07/10/2026
1+ £61.26
10+ £57.95
100+ £57.61
Price per unit Ex VAT 		230V 24V 130VA 105mm 96mm 78mm 2.4kg 130va Isolation Transformer
Block ST 20/23/12, 20VA Transformer, 230V to 12V
Block ST 20/23/12, 20VA Transformer, 230V to 12V
Extended range
Order code: 51-5270
MPN: ST 20/23/12

Available to back orderBack order, lead time 4 weeks
1+ £38.49
10+ £36.41
100+ £36.20
Price per unit Ex VAT 		230V 12V 20VA 81mm 66mm 56mm 0.9kg Isolation Transformer
Block ST 20/23/23, 20VA Transformer, 230V to 230V
Block ST 20/23/23, 20VA Transformer, 230V to 230V
Extended range
Order code: 51-5271
MPN: ST 20/23/23

Back order - 15 availableBack-order availability date - 07/10/2026
1+ £35.78
10+ £33.85
Price per unit Ex VAT 		230V 230V 20VA 81mm 66mm 56mm 0.9kg Isolation Transformer
Block ST 250/23/23, 250VA Transformer, 230V to 230V
Block ST 250/23/23, 250VA Transformer, 230V to 230V
Extended range
Order code: 51-5275
MPN: ST 250/23/23

Back order - 5 availableBack-order availability date - 07/10/2026
1+ £85.59
Price per unit Ex VAT 		230V 230V 250VA 105mm 96mm 103mm 3.9kg Isolation Transformer
Block ST 250/23/24, 250VA Transformer, 230V to 24V
Block ST 250/23/24, 250VA Transformer, 230V to 24V
Extended range
Order code: 51-5276
MPN: ST 250/23/24

Back order - 7 availableBack-order availability date - 07/10/2026
1+ £83.63
Price per unit Ex VAT 		230V 24V 250VA 105mm 96mm 103mm 3.9kg Isolation Transformer
Block ST 320/23/23, 320VA Transformer, 230V to 230V
Block ST 320/23/23, 320VA Transformer, 230V to 230V
Extended range
Order code: 51-5282
MPN: ST 320/23/23

Back order - 2 availableBack-order availability date - 07/10/2026
1+ £99.80
10+ £95.19
100+ £94.73
Price per unit Ex VAT 		230V 230V 320VA 114mm 105mm 103mm 4.6kg 320va Isolation Transformer
Block ST 400/23/24, 400VA Transformer, 230V to 24V
Block ST 400/23/24, 400VA Transformer, 230V to 24V
Order code: 51-5285
MPN: ST 400/23/24
1+ £101.07
Price per unit Ex VAT 		230V 24V 400VA 123mm 120mm 102mm 5.5kg Isolation Transformer
Block ST 500/23/23, 500VA Transformer, 230V to 230V
Block ST 500/23/23, 500VA Transformer, 230V to 230V
Extended range
Order code: 51-5288
MPN: ST 500/23/23

Back order - 2 availableBack-order availability date - 07/10/2026
1+ £141.53
10+ £135.00
100+ £134.34
Price per unit Ex VAT 		230V 230V 500VA 123mm 120mm 122mm 7.2kg Isolation Transformer
Block ST 63/23/23, 63VA Transformer, 230V to 230V
Block ST 63/23/23, 63VA Transformer, 230V to 230V
Extended range
Order code: 51-5293
MPN: ST 63/23/23

Back order - 16 availableBack-order availability date - 07/10/2026
1+ £44.01
10+ £41.63
100+ £41.39
Price per unit Ex VAT 		230V 230V 63VA 89mm 78mm 60mm 1.3kg Isolation Transformer
Block ST 63/23/24, 63VA Transformer, 230V to 24V
Block ST 63/23/24, 63VA Transformer, 230V to 24V
Extended range
Order code: 51-5294
MPN: ST 63/23/24

Back order - 15 availableBack-order availability date - 07/10/2026
1+ £47.26
Price per unit Ex VAT 		230V 24V 63VA 89mm 78mm 60mm 1.3kg Isolation Transformer
Block ST 800/23/23, 800VA Transformer, 230V to 230V
Block ST 800/23/23, 800VA Transformer, 230V to 230V
Extended range
Order code: 51-5300
MPN: ST 800/23/23

Available to back orderBack order, lead time 3 weeks
1+ £194.67
100+ £185.97
Price per unit Ex VAT 		230V 230V 800VA 148mm 150mm 128mm 9.6kg 800va Isolation Transformer
Block ST 160/4/24, 160VA Transformer, 400V to 24V
Block ST 160/4/24, 160VA Transformer, 400V to 24V
Extended range
Order code: 51-5267
MPN: ST 160/4/24

Back order - 2 availableBack-order availability date - 07/10/2026
1+ £69.58
Price per unit Ex VAT 		400V 24V 160VA 105mm 96mm 88mm 2.9kg Isolation Transformer
Block ST 20/4/23, 20VA Transformer, 400V to 230V
Block ST 20/4/23, 20VA Transformer, 400V to 230V
Extended range
Order code: 51-5273
MPN: ST 20/4/23

Back order - 9 availableBack-order availability date - 07/10/2026
1+ £39.77
Price per unit Ex VAT 		400V 230V 20VA 81mm 66mm 56mm 0.9kg Isolation Transformer
Block ST 250/4/23, 250VA Transformer, 400V to 230V
Block ST 250/4/23, 250VA Transformer, 400V to 230V
Extended range
Order code: 51-5278
MPN: ST 250/4/23

Despatched same day - 1 in stockBack-order availability date - 07/10/2026
1+ £82.67
10+ £78.85
100+ £78.47
Price per unit Ex VAT 		400V 230V 250VA 105mm 96mm 103mm 3.9kg Isolation Transformer
Block ST 2500/4/23, 2500VA Transformer, 400V to 230V
Block ST 2500/4/23, 2500VA Transformer, 400V to 230V
Extended range
Order code: 51-5280
MPN: ST 2500/4/23

Back order - 5 availableBack-order availability date - 07/10/2026
1+ £490.57
10+ £470.64
Price per unit Ex VAT 		400V 230V 2500VA 182mm 192mm 184mm 24.8kg 2500va Isolation Transformer
Block ST 400/4/24, 400VA Transformer, 400V to 24V
Block ST 400/4/24, 400VA Transformer, 400V to 24V
Extended range
Order code: 51-5286
MPN: ST 400/4/24

Back order - 4 availableBack-order availability date - 07/10/2026
1+ £116.23
10+ £110.86
100+ £110.32
Price per unit Ex VAT 		400V 24V 400VA 123mm 120mm 102mm 5.5kg Isolation Transformer
Block ST 250/44/23, 250VA Transformer, 440V to 230V
Block ST 250/44/23, 250VA Transformer, 440V to 230V
Extended range
Order code: 51-5279
MPN: ST 250/44/23

Back order - 6 availableBack-order availability date - 07/10/2026
1+ £83.88
10+ £80.00
100+ £79.62
Price per unit Ex VAT 		440V 230V 250VA 105mm 96mm 103mm 3.9kg Isolation Transformer

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