Bussmann FNQ-R crosses to Marathon Special Products CC-T. Both are Class CC time delay fuses rated 600 VAC. The table lists 36 Marathon CC-T ratings from 1/10 A to 30 A with the Mersen ATQR and Littelfuse KLDR numbers on the same line. 26 of them also have an exact Bussmann FNQ-R match. Every line is an exact amp-for-amp match.
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Bussmann FNQ-R to Marathon CC-T cross reference
| Bussmann | Amps | Marathon | Mersen | Littelfuse |
|---|---|---|---|---|
| not listed | 1/10 A | CC-T1/10 | ATQR1/10 | KLDR.100 |
| not listed | 1/5 A | CC-T2/10 | ATQR1/5 | KLDR.200 |
| FNQ-R-1/4 | 1/4 A | CC-T1/4 | ATQR1/4 | KLDR.250 |
| FNQ-R-3/10 | 3/10 A | CC-T3/10 | ATQR3/10 | KLDR.300 |
| not listed | 2/5 A | CC-T4/10 | ATQR2/5 | KLDR.400 |
| FNQ-R-1/2 | 1/2 A | CC-T1/2 | ATQR1/2 | KLDR.500 |
| not listed | 3/5 A | CC-T6/10 | ATQR3/5 | KLDR.600 |
| FNQ-R-3/4 | 3/4 A | CC-T3/4 | ATQR3/4 | KLDR.750 |
| not listed | 4/5 A | CC-T8/10 | ATQR4/5 | KLDR.800 |
| FNQ-R-1 | 1 A | CC-T1 | ATQR1 | KLDR001 |
| FNQ-R-1-1/4 | 1-1/4 A | CC-T1-1/4 | ATQR1-1/4 | KLDR01.25 |
| FNQ-R-1-1/2 | 1-1/2 A | CC-T1-1/2 | ATQR1-1/2 | KLDR01.5 |
| not listed | 1-3/5 A | CC-T1-6/10 | ATQR1-3/5 | KLDR01.6 |
| not listed | 1-4/5 A | CC-T1-8/10 | ATQR1-4/5 | KLDR01.8 |
| FNQ-R-2 | 2 A | CC-T2 | ATQR2 | KLDR002 |
| FNQ-R-2-1/2 | 2-1/2 A | CC-T2-1/2 | ATQR2-1/2 | KLDR02.5 |
| not listed | 2-4/5 A | CC-T2-8/10 | ATQR2-4/5 | KLDR02.8 |
| FNQ-R-3 | 3 A | CC-T3 | ATQR3 | KLDR003 |
| not listed | 3-1/5 A | CC-T3-2/10 | ATQR3-1/5 | KLDR03.2 |
| FNQ-R-3-1/2 | 3-1/2 A | CC-T3-1/2 | ATQR3-1/2 | KLDR03.5 |
| FNQ-R-4 | 4 A | CC-T4 | ATQR4 | KLDR004 |
| FNQ-R-4-1/2 | 4-1/2 A | CC-T4-1/2 | ATQR4-1/2 | KLDR04.5 |
| FNQ-R-5 | 5 A | CC-T5 | ATQR5 | KLDR005 |
| not listed | 5-3/5 A | CC-T5-6/10 | ATQR5-3/5 | KLDR05.6 |
| FNQ-R-6 | 6 A | CC-T6 | ATQR6 | KLDR006 |
| FNQ-R-7 | 7 A | CC-T7 | ATQR7 | KLDR007 |
| FNQ-R-7-1/2 | 7-1/2 A | CC-T7-1/2 | ATQR7-1/2 | KLDR07.5 |
| FNQ-R-8 | 8 A | CC-T8 | ATQR8 | KLDR008 |
| FNQ-R-9 | 9 A | CC-T9 | ATQR9 | KLDR009 |
| FNQ-R-10 | 10 A | CC-T10 | ATQR10 | KLDR010 |
| FNQ-R-12 | 12 A | CC-T12 | ATQR12 | KLDR012 |
| FNQ-R-15 | 15 A | CC-T15 | ATQR15 | KLDR015 |
| FNQ-R-17-1/2 | 17-1/2 A | CC-T17-1/2 | ATQR17-1/2 | KLDR17.5 |
| FNQ-R-20 | 20 A | CC-T20 | ATQR20 | KLDR020 |
| FNQ-R-25 | 25 A | CC-T25 | ATQR25 | KLDR025 |
| FNQ-R-30 | 30 A | CC-T30 | ATQR30 | KLDR030 |
All Marathon CC-T fuses on this page are Class CC, time delay, 600 VAC. "Not listed" means the competitor datasheet we checked does not show that exact rating, so we do not cross it. No nearest-rating substitutions.
Time delay or fast acting?
FNQ-R, ATQR, KLDR and CC-T are time delay Class CC fuses. They ride through the inrush of control transformers, solenoids and small motors. For control circuits with low inrush, the print may call for a fast acting Class CC fuse such as Bussmann KTK-R. The Marathon match there is CC-F.
Sizing a CC-T for a control transformer
Send the transformer kVA and primary voltage. We size the primary fuse and quote the fuse, the holder and the transformer together. See control transformers by kVA.
Common questions
What is the Marathon equivalent of Bussmann FNQ-R-10?
Marathon Special Products CC-T10 is the Class CC time delay fuse at 10 A and 600 VAC. Mersen ATQR10 and Littelfuse KLDR010 are the same rating.
Is Marathon CC-T time delay or fast acting?
CC-T is the Class CC time delay series, 600 VAC, 1/10 A to 30 A. CC-F is the Class CC fast acting series that crosses Bussmann KTK-R.
Which Marathon fuse crosses Mersen ATQR or Littelfuse KLDR?
The same CC-T catalog number. Match the amp rating: ATQR5 and KLDR005 both cross to CC-T5.
Why do some ratings show no Bussmann number?
Some CC-T ratings, such as CC-T2/10 (1/5 A) and CC-T8/10 (4/5 A), match Mersen ATQR and Littelfuse KLDR, but the Bussmann FNQ-R datasheet we checked shows no exact rating there. We list only exact matches.
Get a cross-referenced quote
Send the Bussmann, Mersen or Littelfuse part number and the quantity. We send back the Marathon match, the lead time and a quote. Need help with fuses and holders for a panel? Book a time and we will go through the application.
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More cross references: all cross references · Bussmann LPJ to Marathon CJ-T · Bussmann JKS to Marathon CJ-F · Bussmann KTK-R to Marathon CC-F · Marathon Special Products collection
Bussmann and FNQ-R are trademarks of Eaton. Mersen and ATQR are trademarks of Mersen. Littelfuse and KLDR are trademarks of Littelfuse, Inc. Applied Control Inc. is not affiliated with, endorsed by, or sponsored by these companies. Competitor part numbers appear here only to identify products for comparison. Confirm the final selection against the current manufacturer datasheets before purchase or installation.