SRF1260-820M

Overview

The SRF1260-820M is a shielded dual-coil coupled inductor array from the Bourns SRF1260 series, designed for surface-mount assembly. It features an 82 µH nominal inductance with a ±20% tolerance. The component provides 328 µH inductance when coils are connected in series and 82 µH when connected in parallel. It has a maximum DC resistance of 568 mΩ in series configuration and 150 mΩ in parallel. Rated currents are 1.03 A (series) and 2.05 A (parallel), with saturation currents of 1.2 A (series) and 2.39 A (parallel). The package measures 12.50 mm x 12.50 mm x 6.20 mm.

Feature Summary

• Dual-winding coupled inductor structure with magnetic shielding to minimize electromagnetic interference.
• Supports flexible circuit design through selectable series or parallel coil connections.
• Constructed with ferrite core material for stable performance across operating temperatures.

Applications

• DC-DC converter input/output filtering
• Power supply common-mode noise suppression
• Coupled inductor filter stages in synchronous rectification circuits

Procurement Notes

Verify the specific suffix 'M' confirms the ±20% tolerance variant. Confirm RoHS3 compliance status as per the latest manufacturer statement. Check moisture sensitivity level (MSL 1) requirements for storage and handling prior to soldering. Ensure the ordering quantity matches the available tape and reel specifications provided by the distributor.

Selection Notes

Select this component when a compact footprint is required for coupled inductor applications. Compare the 12.50 mm square package against larger alternatives if space is constrained. Evaluate the 1.03 A series rated current against the peak load requirements of the target power stage. Consider the 150 mΩ parallel DCR for efficiency calculations in low-voltage high-current designs.

Part Context

This part belongs to the Bourns SRF1260 series of shielded power inductors. The series offers various inductance values within the same mechanical envelope. The SRF1260 designation indicates the 12.6 mm x 10.6 mm class footprint, though this specific unit measures 12.50 mm square. It is distinct from the taller SRF1280 series which shares similar electrical characteristics but different physical dimensions.

Replacement Considerations

The SRF1280-820M is a physically compatible alternative within the same manufacturer's lineup, offering higher current ratings but requiring verification of the increased height (8.00 mm vs 6.20 mm).