Block Open Frame 3.5 kVA Auto-Transformer, 208 V ac Primary, 400 V ac Secondary
- RS Stock No.:
- 738-7812
- Mfr. Part No.:
- AT3 3,5-20/21-4
- Brand:
- Block
Image representative of range
Bulk discount available
View bulk pricing optionsSubtotal (1 unit)*
£428.06
(exc. VAT)
£513.67
(inc. VAT)
FREE delivery for orders over £60.00
Temporarily out of stock
- 1 unit(s) shipping from 05 August 2026
Need more? Click ‘Check delivery dates’ to find extra stock and lead times.
Units | Per unit |
|---|---|
| 1 - 4 | £428.06 |
| 5 + | £385.25 |
*price indicative
- RS Stock No.:
- 738-7812
- Mfr. Part No.:
- AT3 3,5-20/21-4
- Brand:
- Block
Specifications
Technical Reference
Legislation and Compliance
Product Details
Find similar products by selecting one or more attributes.
Select all | Attribute | Value |
|---|---|---|
| Brand | Block | |
| Primary Voltage | 208 V ac | |
| Product Type | Auto-Transformer | |
| Secondary Voltage | 400 V ac | |
| Construction | Open Frame | |
| Mount Type | Wall, Floor Standing, Chassis | |
| Termination Type | Screw | |
| Minimum Operating Frequency | 50Hz | |
| Secondary Power | 3.5kVA | |
| Maximum Operating Temperature | 40°C | |
| Maximum Operating Frequency | 60Hz | |
| Length | 267mm | |
| Series | AT3 | |
| Width | 150mm | |
| Standards/Approvals | No | |
| Weight | 20kg | |
| Depth | 220mm | |
| Select all | ||
|---|---|---|
Brand Block | ||
Primary Voltage 208 V ac | ||
Product Type Auto-Transformer | ||
Secondary Voltage 400 V ac | ||
Construction Open Frame | ||
Mount Type Wall, Floor Standing, Chassis | ||
Termination Type Screw | ||
Minimum Operating Frequency 50Hz | ||
Secondary Power 3.5kVA | ||
Maximum Operating Temperature 40°C | ||
Maximum Operating Frequency 60Hz | ||
Length 267mm | ||
Series AT3 | ||
Width 150mm | ||
Standards/Approvals No | ||
Weight 20kg | ||
Depth 220mm | ||
- COO (Country of Origin):
- DE
AT3 Series Autotransformers
Range of high efficiency low heat loss 3 phase auto transformers
Common input and output windings
Easy installation-mounting holes provided
Screw terminal connections
Reverse operation posible
Transformers tested to EN 61558-2-13
BLOCKIMPEX vacuum impregnation
Approvals
UL 5085-1/2 CSA 22.2
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