The F1B1-464612/464615 is the highest-current series in the unshielded F1B1 SMD family, using a 4.6 × 4.6 mm footprint at 1.2 mm or 1.5 mm height. Open-core construction delivers higher current capacity per unit volume than shielded equivalents, suited for output-filter and power-choke roles in cost-sensitive DC-DC converter designs and general power supply stages.