25 + 25 500VA Toroidal Transformer

Toroidal Transformers

Toroidal transformers are becoming increasingly popular due to their improved magnetic properties. 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 it radiates less electromagnetic interference (EMI) to nearby circuits or equipment. EMI is of increasing importance in modern low power, high frequency electronics. 

Toroid transformers can be made to a lower profile than a standard solenoid core transformer, allowing for equipment of similar power to be of a lower profile. 

Included Mounting Hardware 
1 x Metal Washer: Φ8.5 x 90 x 1.2mm 
2 x Rubber Washer: Φ8.5 x 120 x 1.5mm 
1 x M8 x 70 Screw 
1 x M8 Hex Nut 
1 x M8 Washer 
1 x M8 Lock Washer 

Notes on Wiring

Secondaries parallel 
Current available where secondaries are connected in parallel. 

Secondaries series 
Current available where secondaries are connected in series. 

FEATURES:

• Lower electrically induced noise demanded by compact equipment.
• High efficiency enabling conservative rating whilst maintaining size advantages.
• The toroidal transformer is accepted as the industry standard, replacing the laminated type as toroidal transformers offer advantages in size, weight, and lower radiated field.

SPECIFICATIONS:

• Safety Standard: AS/NZS 61558-2-6 Certified
• Primary voltage: 240V AC 50Hz
• Secondary voltage: 25V (parallel), 50V (series) 
• Secondary current: 20A (parallel), 10A (series) 
• Regulation: Better than 10%
• Maximum temperature rise: 75°C
• Maximum ambient Temperature: 25°C
• Dielectric strength: 4000V for 1 Minute
• Insulation class: Class B (130ºC)
• Tolerance: ± 2%
• Thermal Protector: Thermal cut-out 17AM033A5 130℃ 9A 250V
• Winding Wire: Enamelled Copper
• Pri. Winding: 574Ts￠0.96mm 
• Sec. Winding: 75Ts+75Ts￠1.8mm 
• Sec. Rating: 2 x 30VAC, 8.3A
• Pri. Lead Wire: UL1672 AWG#18, 105°C, VW-1, 300V, double insulation
• Sec. Lead Wire: UL3321 AWG#12 150 °C VW-1, 600V, Single insulation