| MRO Supply | 1376049 | 1 | | 1 | |
| Allied Electronics | 70150834 | 1 | | 1 | |
| Onlinecomponents.com | BK/KTK-20 | 25 | | 25 | 25 @ $31.72, 26 @ $19.52, 51 @ $15.45, 76 @ $15.14 |
 Onlinecomponents.com | KTK-20 | 1 | 165 | 1 | 1 @ $33.39, 25 @ $31.72, 50 @ $19.52, 75 @ $15.45, 100 @ $15.14 |
 Zoro | G0502546 | 1 | | 1 | 1 @ $17.49 |
| Allied Electronics | 71419944 | 100 | | 100 | |
| 1Source | KTK-20 | 1 | | 1 | |
 Digi-Key | BK/KTK-20-ND | 100 | | 100 | 100 @ $20.18 |
 Platt.com | 0370744 | 1 | 100 | 1 | 1 @ $31.58 |
 Platt.com | 0956411 | 1 | | 1 | 1 @ $57.41 |
 Carlton Bates Company | 05171242020 | 1 | | 1 | 1 @ $22.40 |
| Fuses Unlimited | BK/KTK-20 | 100 | | 100 | |
| Fuses Unlimited | KTK-20 | 1 | 900 | 1 | |
 AI Consolidated | KTK-20-BUSSMANN | 1 | -2 | 1 | 1 @ $18.96 |
| Digi-Key | 283-2468-ND | 1 | | 1 | 1 @ $29.95, 5 @ $28.52, 10 @ $26.38, 50 @ $22.82, 100 @ $21.39, 250 @ $19.96, 500 @ $18.54, 1000 @ $17.82 |
| Future Electronics | 1028368 | 10 | | 10 | 10 @ $32.93, 5 @ $29.43, 10 @ $28.05, 25 @ $26.32, 50 @ $25.09 |
 Tundra | 381434 | 1 | | 1 | 1 @ $27.46 |
 Walker Industrial | KTK-20 | 10 | 3 to 5 Days | 10 | 1 @ $34.18 |
 Raptor Supplies | AE2FJP | 1 | | 1 | 1 @ $12.50 |
 AmazonTP | B078C663ZY | 1 | | 1 | 1 @ $54.95 |
 Newark | 63R7757 | 1 | 8 | 1 | 1 @ $57.44, 5 @ $54.57, 10 @ $51.69, 25 @ $47.86, 50 @ $44.03, 100 @ $40.21 |
| Newark | 99M4543 | 100 | | 100 | 100 @ $44.79, 250 @ $40.77 |
 Newark | 01P3613 | 1 | 36 | 1 | 1 @ $57.44, 5 @ $54.57, 10 @ $51.69, 25 @ $47.86, 50 @ $44.03, 100 @ $40.21 |
| Digi-Key | 265007 | 1 | | 1 | 1 @ $55.23, 5 @ $52.47, 10 @ $49.70, 50 @ $41.42, 100 @ $38.66, 250 @ $35.90 |
 Maxedbuy | KTK-20 | 1 | | 1 | |
| French Gerleman | BUSSKTK20 | 1 | | 1 | |
| Guardian | KTK-20 | 1 | -2 | 1 | |
 ferguson.com | 163578 | 1 | -2 | 1 | 1 @ $20.21 |
 kempstoncontrols.co.uk | KTK-20 | 1 | 45 | 1 | 1 @ $23.04 |
| standardelectricsupply.com | 8080 | 1 | | 1 | 1 @ $390.60 |
 Kelly Hayes | KTK-20 | 1 | 9 | 1 | 1 @ $16.90 |
 turtle.com | BUS KTK-20 | 1 | -2 | 1 | 1 @ $14.77 |
 steinerelectric.com | 5021 | 1 | | 1 | 1 @ $27.58 |
 BD Enterprises | KTK-20 | 1 | | 1 | 1 @ $19.95, 10 @ $18.89, 25 @ $18.89, 50 @ $17.55, 200 @ $15.95 |
| Widespread | KTK-20 | 1 | | 1 | |
 bakedeco.com | 38-1434 | 1 | -2 | 1 | 1 @ $48.95 |
| Hutch and Son | KTK-20 | 1 | | 1 | |
| turtle.com | BST KTK-20 | 1 | -2 | 1 | 1 @ $0.00 |
| Crescent Electric Supply Co | 2140073 | 1 | | 1 | |
| RS Delivers | 849-5932 | 1 | | 1 | 1 @ $37.18, 5 @ $34.58, 25 @ $32.35, 50 @ $30.35, 100 @ $28.59 |
| galesburgelectric.com | KTK-20 | 1 | | 1 | |
 Galco | KTK-20-BUSS | 1 | 30 | 1 | 1 @ $19.67 |
 Galco | BK/KTK-20-BUSS | 100 | | 100 | 1 @ $34.38 |
 globalcommercialparts.com | BUS_KTK20 | 1 | 14 | 1 | 1 @ $22.31 |
| Crescent Electric Supply Co | KTK-20 | 1 | | 1 | |
| us.rs-online.com | 70150834 | 1 | 18 | 1 | 1 @ $51.77, 5 @ $49.30, 10 @ $45.60, 50 @ $39.44, 100 @ $36.97, 200 @ $34.51 |
| RS Online | 8495932 | 1 | | 1 | |
 National Supply Network | 74974031 | 10 | -2 | 10 | 1 @ $30.80 |
 Allfuses | KTK-20 | 1 | | 1 | 1 @ $8.09 |
 NRI Industrial | B398200 | 1 | | 1 | 1 @ $27.48 |
 crescentelectric.com | 162378 | 1 | 16 | 1 | 1 @ $39.83 |
 superbreakers.com | KTK-20 | 1 | No stock | 1 | 1 @ $10.73 |
| Airline Hydraulics | BUSSMANN KTK-20 | 1 | | 1 | 1 @ $59.19 |
| simplybreakers.com | KTK-20 | 1 | -2 | 1 | 1 @ $9585.00 |
 simsupply.com | ZO-G0502546 | 1 | 797 | 1 | 1 @ $26.67 |
 Tedss | 2026001285 | 1 | -2 | 1 | 1 @ $21.86 |
| Grainger | 4XC44 | 1 | | 1 | |
 NRI Industrial | D460377 | 1 | | 1 | 1 @ $39.98 |
