SRF3225AB-101Y

Overview

The Bourns SRF3225AB-101Y is a surface-mount common mode chip inductor designed for automotive applications. It features a ferrite core and shielded construction to provide low radiation and high impedance across a wide frequency range. Key electrical parameters include an inductance of 100 µH at 100 kHz, a maximum DC current rating of 100 mA, and a DC resistance of 3.5 Ohms. The component achieves an impedance of 5.5 kOhms at 10 MHz and operates within a temperature range of -55°C to +150°C. Its compact dimensions are 3.2 mm x 2.5 mm x 2.5 mm.

Feature Summary

• AEC-Q200 qualified for automotive reliability standards
• Shielded structure with ferrite core for low electromagnetic interference radiation
• Compact 1210 footprint design suitable for space-constrained PCB layouts

Applications

• Automotive electronic systems
• Electromagnetic interference (EMI) suppression circuits
• Signal line filtering in consumer electronics

Procurement Notes

Verify the specific suffix 'Y' against the manufacturer's official documentation to confirm packaging configuration and tape-and-reel specifications. Ensure that the AEC-Q200 qualification status aligns with your project's automotive grade requirements. Cross-reference the impedance tolerance and DC resistance values with the latest datasheet revision to guarantee compatibility with circuit design constraints before finalizing procurement orders.

Selection Notes

Select this component when designing for automotive environments requiring robust EMI suppression in a small form factor. The 100 mA current rating suits low-power signal lines rather than high-current power rails. Consider the 3.5 Ohm DC resistance impact on voltage drop if used in sensitive analog paths. The wide operating temperature range supports harsh automotive conditions without derating concerns typical of commercial-grade parts.

Part Context

This part belongs to the SRF3225 series of common mode chokes manufactured by Bourns Inc. The series utilizes a double-wound wire configuration on a ferrite core to maximize shielding effectiveness. It is distinct from the SRF3225TAC and SRF3225TAP variants which may offer different current ratings or impedance profiles while sharing similar physical dimensions.

Replacement Considerations

Direct substitutes must match the 1210 package size, 100 µH inductance, and AEC-Q200 qualification. Verify that alternative components maintain the 5.5 kOhm impedance at 10 MHz and support the -55°C to +150°C temperature range to ensure functional equivalence in automotive applications.