BLM15PX330SN1D

• Multilayer Ferrite bead, Single Line and Single Circuit
• 33 Ohm Rated Impedance with 25% Tolerance
• 3A Maximum DC and RMS Current Rating
• 22 Milliohm DC Resistance
• 0402 (1005 metric) case, 1mm by 500um, 500um Maximum Height
• -55C to 125C Operating range, RoHS Compliant

The Murata BLM15PX330SN1D is a multilayer surface-mount ferrite bead rated at 33 Ohm impedance measured at a 100 MHz test frequency, with a 25% tolerance. It carries up to 3A of DC or RMS current at just 22 milliohm of DC resistance, so it attenuates high-frequency noise while adding little loss to the rail it sits on. The 0402 (1005 metric) chip measures 1mm by 500um with a 500um maximum height and is specified from -55C to 125C. It is RoHS compliant and supplied in tape and reel.

Ferrite beads such as the BLM15PX330SN1D are placed in series with power and signal lines to suppress conducted high-frequency noise and help a board pass EMC emissions testing. Typical positions are the supply pin of a clock oscillator or RF front end, the boundary between a switching regulator and a sensitive analog section, and the shield or supply lines of USB, CAN and LIN interfaces. The 3A rating and 22 milliohm DC resistance let it sit on a real power rail rather than only on signal lines, and the -55C to 125C range plus the automotive designation in the product title point to in-vehicle and industrial use. In 0402 it is used where the filter must fit close to the pin it protects.