500 fast-acting ceramic fuses in two common sizes for immediate replacement and spare stock: reliable overcurrent protection for lab equipment, repairs, and prototyping. Key features Quantity and sizes: 500 fuses total in two standard sizes — 5 x 20 mm and 6 x 30 mm. 5 x 20 mm electrical ratings: rated up to 250 V with the following current options: 0.1 A, 0.25 A, 0.5 A, 1 A, 1.5 A, 2 A, 2.5 A, 3 A, 3.15 A, 4 A, 5 A, 6 A, 6.3 A, 8 A, 10 A, 15 A, and 16 A. 6 x 30 mm options: available in multiple current ratings; color-coding on the fuses helps you identify the rating quickly. Material and performance: ceramic body for superior heat resistance and stability; fast-acting fuse element for quick interruption of short-circuit and overcurrent events. Application compatibility: suitable for power supplies, electronics repair, prototyping, and general equipment protection. Safety reminder: always replace with the same physical size and amperage rating, and confirm voltage compatibility before installation. Why this set solves problems Minimizes downtime: a large, ready-to-use stock of common sizes and ratings gets equipment back online immediately after a blown fuse. Keeps repairs efficient: color-coded 6 x 30 mm fuses and a broad 5 x 20 mm rating selection reduce time spent identifying the correct replacement. Protects sensitive devices: ceramic construction and a fast-acting profile offer robust protection for power supplies, control panels, and testing rigs. Practical use cases Replace a blown fuse in a lab bench power supply or electronics testing rig to restore safe operation quickly. Stock spare fuses for electronics repair benches, hobby projects, and technician workflows to avoid service delays. Protect control panels, small enclosures, and prototype assemblies during assembly, testing, and field maintenance. Benefits at a glance Reliable overcurrent protection with heat-resistant ceramic bodies Wide range of common 5 x 20 mm current ratings up to 250 V Multiple 6 x 30 mm ratings with color-coding for fast identification Large kit reduces downtime and keeps service/repair workflows efficient Straightforward compatibility guidance: match size and amperage, confirm voltage Notes for safe use Always replace a fuse with one of the same size and amperage rating. Confirm the device’s voltage rating before installing replacement fuses.