Table

Class RK1 vs RK5 Fuse Comparison

Class RK1 vs RK5 Fuse Comparison reference with assumptions and boundary notes.

Reference boundary

Class comparison reference only. It does not permit swapping fuse classes, confirm rejection features, or determine let-through performance for equipment.

Reference table

Compare common Class RK1 and RK5 fuse label characteristics without choosing a replacement.

Reference basis uses manufacturer RK1/RK5 comparison literature; product curves govern actual let-through and coordination details.
Fuse classCommon voltage labelsLet-through referenceLabel cuesBoundary
Class RK1250 V, 600 Vlower let-through referenceRK1 often emphasizes lower let-through than RK5 in comparison literatureComparison reference only; product curves govern actual behavior
Class RK5250 V, 600 VHigher let-through referenceRK5 often emphasizes more compact/industrial usage in comparison literatureComparison reference only; product curves govern actual behavior
Class RK family250 V, 600 VRejection-family contextRK labels are read together with holder and product-family markingsComparison reference only; holder and equipment labels govern compatibility
Use notes
  • Use this table for preliminary reference and arithmetic checks only.
  • Confirm equipment ratings, product markings, installation conditions, utility requirements, and the local authority requirements before design or field use.