TSC Pyroferric Part Identification System
| Part Number Prefix | Product Type |
| P1- | Threaded Cores |
| P2- | Bobbin Cores |
| P3- | Plain Cores |
| P4- | Non-Standard Toroids |
| P5- | Beads / Sleaves / Hollow Cores |
| P6- | Cup Cores |
| P7- | Special Shapes |
| PE- | Standard E-Cores |
| PT- | Standard Toroids |
The PE- and PT- series are identified in the following manner:
Example : PE168A-75
Breakdown:
PE = product type ; E-Core
168 = length in 100th inches
A = alternate height designation
75 = material suffix
Example : PT1060A-75
Breakdown:
PT = product type ; Toroidal Core
1060 = OD in 1000th inches
A = alternate height designation
75 = material suffix