Magnetic door release question

Hey everyone, I’ve noticed some of you are using electromagnetic door releases. The ones I can picture are typically for fire doors that stay open and drop when the power cuts, which is precisely what we need. However, those usually offer only about 30-40lb of holding force, allowing someone to close the door manually with relative ease. What do you use that provides more strength than that? I’m in North America, so it needs to be compatible with 120 volts. Thanks!