Bussmann S500-63-R Glass Fuse 63mA 250V AC 35A 5 PK

What this fuse is and who it fits

The Bussmann S500-63-R is a 63 mA, 250 V AC glass fuse rated for a 35 A interrupting capacity at that voltage. It suits equipment that requires a fast-acting, non-rejection cylindrical fuse in the 20 mm by 5 mm form factor. The five-pack quantity covers multiple replacement points or spares for maintenance kits. Builders needing a different current rating or a rejection-style fuse should select another part.

Behaviour under sustained load

The fuse uses a single-element, fast-acting design that opens quickly once current exceeds the 63 mA rating. At its rated 250 V AC it will interrupt fault currents up to 35 A without sustained arcing. Because it is not a time-delay type, it will not tolerate prolonged inrush or overload conditions above the nominal value. Continuous operation at or near the rated current is within design limits.

Thermals noise and power draw

The glass body and cylindrical construction dissipate heat through the fuse block contacts during normal operation. No audible noise is produced by the fuse element itself. Power loss across the fuse is minimal at the rated 63 mA. The component carries CE, CSA and UL certifications and is compatible with HTB series fuse blocks.