SRF1280-151M

Overview

The Bourns SRF1280-151M is a shielded two-coil inductor array designed for surface mount applications. It features an inductance of 150 µH when connected in parallel and 600 µH in series, with a tolerance of ±20%. The component has a maximum DC resistance of 261 mΩ in parallel configuration and supports a rated current of 1.59 A in parallel and 796 mA in series. Its physical dimensions are 12.50mm x 12.50mm x 8.00mm, operating within a temperature range of -40°C to 125°C.

Feature Summary

• Integrated dual-coil architecture providing flexible series or parallel connectivity options within a single compact package.

Applications

• Power supply filtering circuits requiring coupled inductance
• DC-DC converter input/output stages
• Signal processing noise suppression

Procurement Notes

Verify the specific suffix (e.g., M for ±20% tolerance) against design requirements. Confirm RoHS3 compliance and moisture sensitivity level (MSL 1) for assembly processes. Check lead times as standard delivery may extend to 33 weeks. Ensure PCB footprint matches the non-standard 12.50mm x 12.50mm outline.

Selection Notes

Select this component when space-constrained designs require two magnetically coupled inductors. Compare parallel versus series current ratings based on the intended circuit topology. Ensure the 1.59A parallel rating meets peak load demands. Verify thermal management capabilities given the 125°C maximum operating temperature limit.

Part Context

Part of the SRF1280 series from Bourns Inc., which offers various inductance values in a standardized shielded surface-mount form factor. This series is engineered for high-current power electronics applications where magnetic coupling between coils is beneficial for noise reduction or phase shifting.

Replacement Considerations

Direct substitutes within the SRF1280 series include SRF1280-820M (82µH) and SRF1280-150M (15µH) if different inductance values are acceptable. Cross-brand replacements must match the 12.50mm x 12.50mm footprint, shielding type, and electrical parameters.

FAQ

What is the difference in inductance between parallel and series connections?

In parallel connection, the inductance is 150 µH. In series connection, the inductance increases to 600 µH due to the additive effect of the coupled coils.

Is the SRF1280-151M suitable for high-frequency switching applications?

Yes, it is designed for surface mount power applications with a rated current up to 1.59 A and operates up to 125°C, making it suitable for typical DC-DC converter frequencies.