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Potential Transformer fuses

PT series fuses are current limiting, non-indicating, partial range HRC fuses available in a variety of voltage, amperage and interrupting ratings. (see chart).

FC series are North American dimensioned PT fuses and provide equals to Westinghouse and CGE.  BPT series are British dimensioned PT fuses and offer equals to GEC, Brush, CCL, and EMP.

-    Pure silver elements
-    Fully plated metal parts for cool running.
-   Excellent current limitation for substantial reduction of short circuit stresses.



Fusetek PT fuses can replace any other manufacturers' PT fuse with same dimensions and voltage/amp rating. When replacing fuses, ensure that fuse clips still have good spring tension. Adjust or replace if necessary. Make sure contact surfaces are clean and free of corrosion




North American dimensions  
kV Part No. Ampere range D X L CC I.R rms symm.
625Vac FC460 0.5,1,2,3,5,7,10,15,20E 13/16 4.6 4.0 37.5kA
2.75kV FC461 0.25,0.5,1,2,3,5E 13/16 4.6 4.0 37.5kA
2.75kV FC462 0.5,1,2,3,5E 1-9/16 7.4 5.9 37.5kA
FC463 1-9/16 9.5 8.0 37.5kA
4.8kV 4.8NPT 0.5,1,2,3,5E 13/16 5.6 5.0 50kA
5.5kV FC464 0.5,1,2,3,5E 1-9/16 7.4 5.9 50kA
FC465 1-9/16 9.5 8.0 50kA
8.3kV FC466 0.5,1,2,3,5E 1-9/16 9.5 8.0 50kA
15.5kV FC467 0.5,1,2,3,5E 1-9/16 12.8 11.3 35kA
25.8kV FCA22 0.5,1,2,3,5E 1-9/16 17.5 16 32kA
British Dimensions
5.5kV 5.5BPT 0.5,1,2,3,5E 1.0 536 4.75 40kA
8.5kV 8.5BPT 0.5,1,2,3E 1.0 7.6 6.75 40kA



For all PT Fuses
Transformer Fuse Table
Transformer   Fuse
Primary FLC (A)   Rating
From To (A)
0 0.12 1/2
0.13 0.23 1
0.24 0.49 2
0.50 .80 3
.81 1.2 5
1.3 2.0 7
2.1 4.0 10
4.1 6.0 15
6.1 9.3 20
9.4 12.0 25





Our staff possesses decades of in-depth application knowledge and we are eager to share it with you. All of our field engineers have control gear and fuse backgrounds, making us uniquely qualified to provide solutions to your protection problems. We offer selection software to accurately apply our products, fuse audits to help you streamline your operations, or in-house seminars to educate your personnel. Ask us! 


From the friendly voice that answers the phone, to the delivery that arrives before you expect it, we pride ourselves on delivering the absolute highest level of customer service. At Fusetek, customer service is not an empty promise but the way we do business, each and every day. Use us! 


Can’t find that unusual fuse? Not sure about a particular application? We can help. 

Our quick, knowledgeable replies get you the answers you need, when you need them.   Whether it’s technical assistance, help in finding that special fuse, or quick turnaround to get you out of a jam, we’re here for you. Call us!

Contact Us

Toll free for North America
Tel: 1-800-479-3875
Fax: 1-800-866-7690
International Tel: 1-613-384-4144 International Fax: 1-613-384-0167

Email: info@fusetek.comMailing Address: 599 Norris Crt.
Kingston, Ontario
Canada K7P 2R9