[계산기] PCB Trace Power Handling Calculator(허용전류,Power Loss,Resistance,Voltage Drop,Power Loss)

HUMINS

PCB Trace Power Handling Calculator

Trace Width (mm)

Copper Thickness

oz/ft² µm

Ambient Temp (°C)

Allowable Temp Rise (ΔT) (°C)

Trace Length (mm)

Layer Type: External Internal

Calculation Results:

Max Current Capacity (I):

Conductor Operating Temperature:

Trace Resistance (R @ Op Temp):

Voltage Drop (V = I × R):

Power Dissipation (P = I² × R):

Calculation Notes:

• Current capacity (I) is estimated based on IPC-2221A guidelines:
  I = K × (ΔT^0.44) × (Area_mils²^0.725)
• K (constant): 0.048 for external layers, 0.024 for internal layers.
• ΔT is the allowable temperature rise in °C.
• Area_mils² is the trace cross-sectional area in square mils. (1 mil = 25.4 µm; 1 oz/ft² ≈ 34.798 µm copper thickness).
• Resistance (R) is calculated using copper resistivity ρ = 1.724 × 10^-8 Ω·m at 25°C, adjusted for the conductor's operating temperature. Copper temperature coefficient α = 0.003862 /°C (relative to 25°C).
• This calculator provides estimations. For critical applications, always consult the latest IPC-2152 standard and perform thorough thermal analysis.