Abstract: A miniature electromagnetic relay is capable of increasing the coil packing density, yet assuring electrical insulation of the coil from a core of the electromagnet. The relay includes a pair of movable and fixed contacts, an armature carrying the movable contact, and an electromagnet block having an excitation coil which moves the armature for closing and opening the contacts upon being energized. The electromagnet block includes a generally U-shaped core with a center core and a pair of yokes extending from opposite ends of the center core, flanges of dielectric material molded respectively around portions of the yokes, and a dielectric tape fitted around the center core over substantially the entire length of the center core to receive therearound the excitation coil in an electrically insulating relation from the core.