The P0903 is a ferrite pot core designed for applications requiring low leakage inductance, high Q factor, and temperature stability. Its enclosed design minimizes electromagnetic interference, making it suitable for use in broadband and narrowband transformers, telecom inductors, power transformers, power inductors, and inductive switches. 

Key Dimensions:

• A: 7.2 ±0.2 mm
• D1: 9.15 ±0.5 mm
• D2: 7.62 +0.13/-0.12 mm
• D3: 3.8 ±0.1 mm
• D4: 2.05 ±0.05 mm
• G: 1.9 ±0.5 mm
• H1: 2.65 ±0.1 mm
• H2: 1.88 ±0.5 mm

These dimensions ensure compatibility with standard bobbins and hardware, facilitating ease of assembly in various electronic circuits.

Material and Inductance Factor (AL):

The P0903 core is available in multiple ferrite materials, each offering distinct inductance factors (AL) to suit specific application needs:

• CF 140: AL = 1350 nH
• CF 196: AL = 1200 nH
• CF 139: AL = 1250 nH
• CF 195: AL = 1750 nH
• CF 130: AL = 1450 nH

These variations allow designers to select the appropriate material based on the desired inductance and performance characteristics. 

Effective Parameters:

• Effective Magnetic Path Length (Le): 11.97 mm
• Effective Cross-Sectional Area (Ae): 10.46 mm²

These parameters are crucial for calculating the inductance and understanding the magnetic behavior of the core in different circuit configurations