CH143DN Equivalent & Substitute Parts

Part Overview

The CH143DN is a cartridge fuse holder manufactured by Eaton - Bussmann Electrical Division, designed for 40 A, 600V applications with 3-circuit DIN rail mounting. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing system maintenance and new installations where this specific model is no longer available from primary sources.

Substiute Parts

CH143DN

Eaton - Bussmann Electrical DivisionIn Stock: 819CH143DN Datasheet

Current PartRFQ

CH143BN

Eaton - Bussmann Electrical DivisionIn Stock: 935CH143BN Datasheet

DirectRFQ

CH143DNU

Eaton - Bussmann Electrical DivisionIn Stock: 837CH143DNU Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CH143DN is determined by the following critical parameters: current rating, voltage rating, fuse size, number of circuits, fuse type, mounting type, and termination style. All substitute parts must maintain compatibility with 14mm x 51mm cartridge fuses, DIN rail mounting, and screw terminal connections.

The CH143BN qualifies as a direct substitute, matching all core electrical and mechanical specifications while offering active product status and RoHS compliance. The CH143DNU is listed as an alternative but operates at higher electrical ratings (50 A, 700V), making it suitable only for applications where these elevated specifications are acceptable and do not create system incompatibility.

Parameter Comparison

Engineering Selection Recommendations

The CH143BN is the primary equivalent for CH143DN applications. Both parts share identical electrical ratings (40 A, 600V), mechanical dimensions (14mm x 51mm), circuit configuration (3-circuit), and termination method (screw terminal). The CH143BN offers the advantage of active product status and RoHS compliance, ensuring long-term availability and regulatory alignment.

The CH143DNU may be considered as an alternative only in applications where the system design permits operation at 50 A and 700V ratings. This part maintains mechanical and mounting compatibility but introduces higher electrical specifications that may not be suitable for circuits designed for 40 A, 600V operation.

Frequently Asked Questions (FAQ)

Q: Can CH143BN directly replace CH143DN in existing installations? A: Yes. The CH143BN maintains identical current rating (40 A), voltage rating (600V), fuse size (14mm x 51mm), circuit count (3), and termination style (screw terminal), ensuring direct compatibility with CH143DN applications.

Q: What is the primary difference between CH143DN and CH143BN? A: The CH143BN is the active production equivalent of the obsolete CH143DN. Both parts are electrically and mechanically identical. The CH143BN offers RoHS compliance and confirmed availability.

Q: Is CH143DNU a suitable replacement for CH143DN? A: CH143DNU is mechanically compatible but operates at higher electrical ratings (50 A, 700V versus 40 A, 600V). It is suitable only for applications where these elevated specifications do not create system incompatibility or overvoltage conditions.

Q: What fuse cartridges are compatible with these holders? A: All three fuse holders accept 14mm x 51mm cartridge fuses. The specific fuse amperage and voltage rating must match the application requirements and the holder's rated specifications.

Q: Are there packaging differences between these parts? A: CH143BN is available in bulk packaging. CH143DNU is also available in bulk packaging. Packaging format should be confirmed based on procurement requirements.