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M4909C • 240/9+9 30VA Toroidal Transformer 


Cat. Page 282


  • $44.50
  • 2+ $41.00
  • 4+ $38.00
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Last updated 22-10-19 04:20:11

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Toroidal transformers are becoming increasingly popular due to their improved magnetic properties. They can also be made to a lower profile than a standard solenoid core transformer. This allows the equipment to conform to a lower rack unit height i.e. 1RU, 2RU, 3RU.

The advantage of the toroidal (donut) shape is that, due to its symmetry, the amount of magnetic flux that escapes outside the core (leakage flux) is minimised. Therefore, the electromagnetic interference (EMI) that is radiated to nearby circuits or equipment is less. EMI is of increasing importance in modern low power, high frequency electronics.

Toroidal transformer are highly efficient and are replacing the laminated type as the accepted industry standard, because toroids offer advantages in size, weight, and lower radiated field.

Included mounting hardware: 30VA Series - 1RU Height
Rubber Washer: Φ6.5X70X1.5mm 1PCS
Screw: M6X35mm 1PCS
Hex Nut: M6 1PCS
Washer: M6 1PCS
Lock Washer: M6 1PCS

Attention OEM customers: Please contact our parent company Altronic Distributors for extremely competitive wholesale pricing. Variations or custom toroidals are available. Minimum order quantity applies. Manufacturers please note, we recommend that a sample is obtained to confirm suitability


  • Low profile design is suitable for use inside our 1RU 19 rack enclosures.
  • 30VA series models have potted epoxy centre core for easy mounting.
  • Lower electrically induced noise demanded by compact equipment.


Secondaries parallel
Current available where secondaries are connected in parallel.

Secondaries series
Current available where secondaries are connected in series.

D: 76 d: 21 H: 30
Tolerance: 2%

*Specifications subject to change without prior notice.
Manufacturers please note, we recommend that a sample is obtained to confirm suitability

* Outside diameter D is given as a maximum value, inner diameter d is given


  • Leads: ALL
  • Length: 210mm
  • Terminal: 10mm
  • Primary Lead No: 1-2
  • Colour: Brown, Blue
  • Rating: UL1672 AWG#18,105C, VW-1, 300V, Double insulation
  • Secondary Lead No: 3-4
  • Colour: Red, Black
  • Secondary Lead No: 5-6
  • Colour: WHI-ORG
  • Rating: UL1015 AWG#20, 105C, VW-1, 600V, Single insulation
  • Unloaded Voltage: 0-10.08V (V5% regulation)
  • Loading Voltage: 0-9.0V
  • Rated Current (A): 1.6A

*Specifications are subject to change without notice.

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