Difference between Y1 And Y2 Capacitors Y capacitors, commonly used in electronic circuits, include types Y1, Y2, Y3, and Y4, with Y1 and Y2 being the most widely used. The key differences between Y1 and Y2 capacitors are as follows: Withstand Voltage: Y1 has a rated voltage of ≤500VAC, a peak voltage of 8kV, and a test voltage of 4000VAC. Y2 has a rated voltage of 150-500VAC, a peak voltage of 5kV, and a test voltage of 1500VAC. Pin Spacing: Y1 capacitors have a conventional pitch of 10mm, while Y2 capacitors have a pitch of 7.5mm. Insulation Type: Y1 uses double or reinforced insulation, while Y2 uses basic or supplementary insulation. Size: Y1 capacitors are generally larger than Y2 capacitors in terms of volume. Function: Y1 capacitors bridge the primary and secondary sides of circuits. Y2 capacitors connect the primary side to ground for protection (FG line).
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