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Toroidal transformers provide a higher output compared to traditional E-I transformers of a similar physical size. They have substantially reduced radiated hum and electrical noise, generate less heat and have much better regulation making them ideal for high performance, low noise circuits.

The transformer is “potted” in an epoxy compound within a plastic housing. Configured with 2 x 120V primaries and 2 identical secondaries which can be wired in either series or parallel. Being PCB mount reduces assembly time as the transformer simply solders to the PCB. For extra stability and mechanical reliability the transformer can be secured to the PCB with a self tapping screw.

PCB Layout


Information & Downloads


  • Primary voltage: 2 x 120V ac
  • Secondary Voltage: 9 + 9
  • Secondary Current: 3.3A Parallel, 1.6A Series
  • Total VA rating: 30VA
  • Insulation: Class A (105°C)
  • Magnetising current: <30mA
  • Temperature rise: <65°C
  • External ac fuse: 250mA
  • Regulation: ≈16%
  • Weight: ≈450g
  • PCB hole size: 1.2mm
  • Thermal Fuse: Internal 115°C
  • AS/NZS 61558.2.6 approval: Q99396
    • *Specifications are subject to change without notice.

Warranty & Returns


We offer 12 months warranty on this product from its date of purchase. This is available from Altronics stores, online purchases or Altronics resellers. In accordance with our full warranty terms we will repair, replace or refund if goods you have purchased from us are defective.


Not withstanding our warranty policy, if you are dissatisfied with our goods or service you may return the goods within 14 days of our despatch date. Simply contact us for a return authorisation number and we will refund your purchase in full, less transport costs on receipt of goods. All returned goods must be in as sold condition including all packaging, instructions, invoices etc.