{"id":4922,"date":"2026-11-10T04:49:18","date_gmt":"2026-11-10T04:49:18","guid":{"rendered":"https:\/\/kaseey.com\/?wpr2_import=4e31d61da6a2ca0573051241e7db838f086de0bc3a7b4033a89f55d845ee20a2"},"modified":"2026-11-10T04:55:05","modified_gmt":"2026-11-10T04:55:05","slug":"c45-comb-busbar","status":"publish","type":"post","link":"https:\/\/kaseey.com\/id\/c45-comb-busbar\/","title":{"rendered":"C45 Comb Busbar Explained: What the DZ47 Legacy Name Means, and What Actually Decides Fit"},"content":{"rendered":"
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Short Answer:<\/strong> C45 began as a circuit-breaker series name and became a geometric shorthand in comb busbar trading. A C45 comb busbar has no universal current rating or guaranteed breaker fit. Start with tooth width, pitch and the actual terminal entrance<\/strong>, then confirm the remaining dimensions and pole arrangement for the exact article. Even Kaseey’s C45 range is not geometrically identical: C-1L, C-2L and C-3L have 5.5 mm pins, while C-4L has 5.0 mm pins.<\/p>\n<\/blockquote>\n

For a panel builder or distributor, “C45 busbar” can start an enquiry. It cannot finish a purchase specification. The useful next question is which physical interface the buyer needs, rather than whether the supplier recognizes the name. This guide separates that legacy label from the dimensions and order fields that can actually be checked.<\/p>\n

Where the name comes from<\/h2>\n

The breaker-side origin is documented. Schneider Electric’s C45N Merlin Gerin support note<\/a> identifies C45N as a miniature circuit-breaker product line; its separate C45 replacement note<\/a> states that C45 MCBs are obsolete. These records establish a historic product family, not a present-day universal busbar specification.<\/p>\n

In a busbar enquiry, read “C45\/DZ47” as legacy family wording that still needs a physical specification. The historical name tells you where the conversation starts; it does not give the supplier the dimensions of your present breaker terminal. A replacement enquiry should therefore retain the exact device identification as well as the familiar family description.<\/p>\n

The Schneider records support the naming history only. They do not approve a Kaseey comb busbar for a particular breaker, and a legacy family reference should not be turned into such an approval. For this article’s practical purpose, separate three records: the old family name, the current breaker terminal information, and the selected Kaseey product row. Each answers a different question.<\/p>\n

What “C45” denotes on a busbar today<\/h2>\n

In Kaseey’s catalogue, the C45 label identifies the C-series pin-type comb busbar family. Its published configuration records are more useful than the family name: C-1L, the 1P configuration<\/a>, C-2L, the 2P configuration<\/a>, dan C-3L, the 3P configuration<\/a> all specify 5.5 mm pin width. The C-3L page also identifies the L1 \/ L2 \/ L3 sequence.<\/p>\n

Sistem C-4L, or 4P C45 configuration, specifies 5.0 mm pin width<\/strong><\/a>, not 5.5 mm. Its published data differs by configuration; the product page does not explain why. This is direct evidence that even within one manufacturer’s C45 family, the name alone cannot guarantee identical geometry.<\/p>\n

Kaseey C45 configuration reference<\/h3>\n

All dimensions below are published product-page values. The cross-section and reference-current lists correspond in the order shown. Lengths and module counts also correspond in their displayed order; they are catalogue combinations, not freely interchangeable options.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Bidang yang dipublikasikan<\/th>\nC-1L<\/th>\nC-2L<\/th>\nC-3L<\/th>\nC-4L<\/th>\n<\/tr>\n<\/thead>\n
Konfigurasi<\/td>\n1P<\/td>\n2P<\/td>\n3P<\/td>\n4P<\/td>\n<\/tr>\n
Pin width<\/td>\n5.5 mm<\/td>\n5.5 mm<\/td>\n5.5 mm<\/td>\n5.0 mm<\/strong><\/td>\n<\/tr>\n
Pin length<\/td>\n11.5 mm<\/td>\n11.5 mm<\/td>\n11.5 mm<\/td>\n11.5 mm<\/td>\n<\/tr>\n
Pitch \/ device distance<\/td>\n17.8 mm<\/td>\n17.8 mm<\/td>\n17.8 mm<\/td>\n17.8 mm<\/td>\n<\/tr>\n
Pilihan penampang<\/td>\n8 \/ 10 \/ 13 \/ 16 mm\u00b2<\/td>\n8 \/ 10 \/ 13 \/ 16 mm\u00b2<\/td>\n8 \/ 10 \/ 13 \/ 16 mm\u00b2<\/td>\n8 \/ 10 \/ 13 \/ 16 mm\u00b2<\/td>\n<\/tr>\n
Reference current, respectively<\/td>\n50 \/ 63 \/ 70 \/ 80 A<\/td>\n50 \/ 63 \/ 70 \/ 80 A<\/td>\n50 \/ 63 \/ 70 \/ 80 A<\/td>\n50 \/ 63 \/ 70 \/ 80 A<\/td>\n<\/tr>\n
Finished lengths<\/td>\n210 \/ 1000 \/ 1016 mm<\/td>\n210 \/ 1000 \/ 1016 mm<\/td>\n210 \/ 1000 \/ 1016 mm<\/td>\n210 \/ 1016 mm<\/strong><\/td>\n<\/tr>\n
Modules, respectively<\/td>\n12 \/ 54 \/ 57<\/td>\n12 \/ 54 \/ 56<\/td>\n12 \/ 54 \/ 57<\/td>\n12 \/ 56<\/strong><\/td>\n<\/tr>\n
Article No. family<\/td>\nKC01xxxx<\/td>\nKC02xxxx<\/td>\nKC03xxxx<\/td>\nKC04xxxx<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

The prefixes identify catalogue families, not complete order codes. Copy the full Article No. from the selected product row rather than constructing one from a prefix. Likewise, do not infer a module count from overall length or extend a 1P row’s dimensions to 4P because both descriptions contain C45.<\/p>\n

\n\"Kaseey
C-1L illustrates the 5.5 mm pin width published for C-1L, C-2L and C-3L; C-4L is published at 5.0 mm. Product-photo-based exterior comparison and dimension outlines, not a scale drawing or a fit test.<\/figcaption><\/figure>\n

C45 pin vs standard pin<\/h2>\n

For a controlled comparison, use Kaseey’s standard P-1L configuration against C-1L, rather than comparing unrelated sellers’ generic photographs. The published dimensional distinction is tooth width.<\/p>\n\n\n\n\n\n\n\n
Bidang<\/th>\nC-1L, C45 1P<\/th>\nP-1L, standard pin 1P<\/th>\nC-4L exception<\/th>\n<\/tr>\n<\/thead>\n
Pin width<\/td>\n5.5 mm<\/td>\n4.0 mm<\/td>\n5.0 mm<\/td>\n<\/tr>\n
Pin length<\/td>\n11.5 mm<\/td>\n11.5 mm<\/td>\n11.5 mm<\/td>\n<\/tr>\n
Pitch \/ device distance<\/td>\n17.8 mm<\/td>\n17.8 mm<\/td>\n17.8 mm<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

C-1L and P-1L also publish the same cross-section options, reference-current values and finished-length options listed for C-1L above. A wider pin therefore does not establish a higher current capability or a better product. It establishes a different width to check against the terminal entrance. The C-4L column flags its pin-width exception; it does not make 4P equivalent to P-1L in every other respect.<\/p>\n

Choose the interface that the actual breaker terminal accepts. Equal pitch tells you where the teeth repeat along the row; it does not tell you whether a tooth can enter and be correctly retained. A catalogue photo can help identify the style, but the dimensional record and device-terminal requirements settle the enquiry.<\/p>\n

\n\"Kaseey
Kaseey C-1L and P-1L photographs with tooth-width and pitch annotations. The source drawing insets explain dimension positions; this exterior illustration does not demonstrate an approved breaker connection.<\/figcaption><\/figure>\n

Three things the name does not tell you<\/h2>\n

1. It is not a compatibility guarantee<\/h3>\n

The description “C45 busbar” does not identify the exact breaker terminal or the complete Kaseey article. It therefore cannot establish either that a bar is exclusive to DZ47 breakers or that it fits every device described with a related family name. The acceptance decision still requires the actual interface information.<\/p>\n

Kaseey’s own catalogue demonstrates why. The C45 family includes both 5.5 mm and 5.0 mm pin widths, depending on configuration. If the name does not fix one pin width within that catalogue, it cannot replace a dimensional check at the breaker. Require the exact terminal documentation and proposed busbar dimensions before accepting a substitution.<\/p>\n

A useful response to “Will this C45 bar fit?” identifies the device, the proposed article and the dimensions being compared. A response that repeats only the family name leaves the original question unanswered. Keep the fit decision attached to those records so the purchasing and assembly teams are working from the same specification.<\/p>\n

2. It is not a current-rating class<\/h3>\n

Kaseey’s C45 product records are enough to show why the name is not one current value. They publish arus referensi<\/strong> of 50 \/ 63 \/ 70 \/ 80 A for 8 \/ 10 \/ 13 \/ 16 mm\u00b2 respectively. Those are four distinct catalogue entries within the same named family, not one allowance attached to the word C45.<\/p>\n

For example, the C-1L entries for 8 mm\u00b2 and 16 mm\u00b2 retain the same published pin width, pin length and pitch, while their reference-current values are 50 A and 80 A respectively. Matching the visible contact geometry therefore does not select the conductor section or settle the electrical specification. Both parts of the enquiry need to be recorded.<\/p>\n

When comparing a proposed replacement with an existing bar, keep the cross-section and reference-current fields beside the dimensions. Do not substitute the breaker’s ampere marking for the busbar’s product record, or assume that an identical family description preserves the selected conductor section. A quotation should make the chosen configuration clear enough to check against its catalogue row.<\/p>\n

Check the exact article’s cross-section and documented feeding arrangement; C45 supplies neither. Kaseey’s listed values remain reference current, rather than unconditional promises for every assembly. For the separate effect of feeding arrangement, see Comb Busbar Current Ratings: End Feed vs Centre Feed<\/a>.<\/p>\n

3. It does not mean 4.5 kA<\/h3>\n

C45 does not encode a 4.5 kA breaking capacity. Breaking capacity belongs to the breaker side and must come from the exact breaker’s datasheet. The legacy series name and the breaker’s declared breaking capacity are separate pieces of information. Read the latter from the relevant device documentation, together with its applicable conditions, rather than decoding it from a busbar description.<\/p>\n

Keep the family name and breaking-capacity field separate even when both appear in one retail title. Neither value establishes the other, and neither supplies a Kaseey comb busbar short-circuit rating. Also distinguish a legacy series label from European catalogue notation that combines a C trip curve with an ampere suffix.<\/p>\n

What actually decides fit<\/h2>\n

Make these checks against the proposed Article No. and exact breaker, with the equipment isolated and any physical inspection handled by qualified personnel:<\/p>\n

    \n
  1. Frame and terminal entrance:<\/strong> identify the exact breaker series and compare its documented or measured terminal opening with the proposed pin’s insertion envelope.<\/li>\n
  2. Tooth width:<\/strong> verify the relevant Kaseey configuration value, including C-4L’s 5.0 mm exception, against the terminal’s accepted busbar interface.<\/li>\n
  3. Tooth length and pitch:<\/strong> compare the published 11.5 mm pin length and 17.8 mm device distance with the terminal depth and repeated terminal positions across the actual row.<\/li>\n
  4. Poles and sequence:<\/strong> verify the selected pole configuration and every intended phase or neutral position against the device arrangement and product documentation.<\/li>\n
  5. Cross-section and feed position:<\/strong> check the selected conductor section and feeding arrangement against the exact product’s electrical documentation and assembly requirements.<\/li>\n<\/ol>\n

    These are procurement checks, not installation instructions. Once the interface is confirmed, use How to Install a Comb Busbar<\/a> for the separate assembly task.<\/p>\n

    Before you order<\/h2>\n

    Turn the checks into an enquiry that a supplier can answer without guessing. Provide:<\/p>\n