TOPProductsAccessories/FusesF2019 Accessories/Fuses Ceramic tube fuse F2019 Ceramic tube fuse0.63A/250V Φ5.2×20㎜ Applicable model RD700 (S/N: < 5228775)/RD701 (S/N: < 5228975) * S/N (=serial number) is located on the back side of product.