Engineers and buyers need numerical data first to evaluate power inductors. The SPM5015T-1R5M-CA is a compact, shielded wirewound SMD component featuring a nominal 1.5 µH inductance and a typical DCR range of 36.9–43.7 mΩ. With rated DC currents around 5A, these metrics make the part vital for high-efficiency buck converters where PCB real estate is at a premium.
Background — Why this SMD power inductor matters
This component class is essential for power conversion and filtering in point-of-load modules. Its metal-shielded construction reduces external magnetic flux, limiting EMI while providing mechanical robustness for industrial environments.
SPM5015T-1R5M-CA Specs: Electrical Summary
| Parameter | Value (typ / max) |
|---|---|
| Inductance | 1.5 µH (±20% Tolerance) |
| DCR (DC Resistance) | 36.9 mΩ (typ) — 43.7 mΩ (max) |
| Rated DC Current (Idc) | ~4.7–5.2 A (continuous) |
| Saturation Current (Isat) | ~6.0 A (specified drop) |
| Test Frequency | 100 kHz |
| Operating Temperature | -40 to 125 °C |
| Package Size | 5.4 × 5.1 × 1.5 mm |
Data Analysis — DCR & Thermal Losses
Calculating I²R losses is critical. At a 4A load, a 36.9 mΩ DCR results in ~0.59W dissipation, while at the 43.7 mΩ max, it rises to ~0.70W. In a small 5.4mm footprint, this requires careful PCB thermal planning. A rule-of-thumb derating of 10–20% for continuous operation is recommended for ambient temperatures exceeding 40°C.
Fast Sourcing & Procurement Guide
Before ordering, verify the 3D footprint and land pattern in your CAD tool. For fast-build scenarios, request a Certificate of Conformance (CoC) and recent lot datasheets to ensure the current batch meets your power budget and reliability standards.
Summary
- Shielded SMD inductor (~1.5 µH) optimized for efficiency via low DCR (36.9–43.7 mΩ).
- Rated for high-current loads (~5A) with saturation performance up to 6A.
- Thermal management must account for I²R losses in the 5.4 x 5.1 mm footprint.
- Sourcing requires verification of lot documentation and footprint compatibility before scaling.
