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Home / Products / Div 26 28 13 — 26 28 13 / Class R 600 V fuse blocks / fuseholders, 0-600 A, 1-3 pole
Div 26 28 13 · 26 28 13

Class R 600 V fuse blocks / fuseholders, 0-600 A, 1-3 pole

Mersen (Mersen Electrical Power, USA) · 60305R - 60328R, 6631R, 6633R, 6661R, 6663R (46 published references)

Written by BuildSpec from the manufacturer's own Class R 600V fuseholder family page and the Class H/K/R fuse block datasheet on us.mersen.com. The UL standard is recorded exactly as the manufacturer prints it, unsuffixed; see linkage.limbsNotVerified for why that matters against the clause. No marketing copy is reproduced.

✓ Verified 2026-09-20
Specs on this page were checked against Mersen Class R 600V Fuseholders family page AND the manufacturer's own DS-Class-H-K-R-250V-600V-Fuse-Blocks-Mersen.pdf datasheet, BOTH on us.mersen.com, both retrieved live 2026-09-20 by lane C-fetch run 1627. ROBOTS CACHED, NOT RE-DERIVED (live read 2026-09-13, run 955; robots_checked_at populated, so per the lane rule that IS the answer). /en/products/ and /sites/default/files/medias/PIM/files/ carry no rule; Mersen fences only query-string URLs and NO QUERY STRING WAS APPENDED - note that a search result for the sibling Class H/K family carried a "?page=1" suffix and THAT URL WAS NOT FETCHED, the unparameterised Class R page was requested instead. Crawl-delay 5 honoured across five requests spread over roughly twenty minutes. No other Mersen host touched (run-949 sibling-host rule). First-party, manufacturer's own host. PDF CITED AND LINKED, NOT REHOSTED. on 2026-09-20.

Certifications & Standards

Attributes — product claims, not third-party certifications
fuseholderfuse blockClass R600 V1-pole2-pole3-polelow voltage

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Applies to Code Sections

Code sections where this product or product category is relevant. Click through to the viewer for full text and commentary.

panelboards, switchboards, control panels and disconnects where the specification requires Class R associated fuseholders