The SRN4018TA-680M is a semi-shielded power inductor from Bourns designed for power conversion and filtering applications. It features an inductance of 68 µH at 100 kHz with ±20% tolerance, a self-resonant frequency of 10 MHz typical, and a DC resistance of 0.89 O (±20%). The inductor is rated for 0.55 A RMS continuous current with a saturation current of 0.55 A typical, and operates reliably across a temperature range of -55°C to +125°C with a 40°C temperature rise at rated current. The device is AEC-Q200 qualified, RoHS compliant, and halogen-free, making it suitable for automotive and industrial power management circuits, DC-DC converters, and EMI filtering applications where compact size and semi-shielded construction are advantageous.