| MRO Supply | 1376072 | 1 | | 1 | |
| Onlinecomponents.com | BK/KTK-R-5 | 25 | | 25 | 25 @ $34.29, 26 @ $21.10, 51 @ $16.71, 76 @ $16.37 |
| Grainger | 4XC24 | 1 | | 1 | |
 Zoro | G0798804 | 1 | 2319 | 1 | 1 @ $23.30 |
| Allied Electronics | 71419950 | 100 | | 100 | |
| Allied Electronics | 70150957 | 1 | | 1 | |
| 1Source | KTK-R-5 | 1 | | 1 | |
| RS Online | 8483911 | 1 | | 1 | |
 Digi-Key | BK/KTK-R-5-ND | 100 | | 100 | 100 @ $22.73 |
 Walker Industrial | KTK-R-5 | 10 | -2 | 10 | 1 @ $23.30 |
 Platt.com | 0511533 | 1 | 263 | 1 | 1 @ $28.78 |
 Platt.com | 0956424 | 1 | | 1 | 1 @ $57.56 |
.jpeg) Resourceful Supply | KTK-R-5 | 1 | | 1 | 1 @ $8.30 |
 Carlton Bates Company | 05171242064 | 1 | 6 | 1 | 1 @ $24.04 |
| Fuses Unlimited | BK/KTK-R-5 | 100 | | 100 | |
| Fuses Unlimited | KTK-R-5 | 1 | 212 | 1 | |
 AI Consolidated | KTK-R-5-BUSSMANN | 1 | -2 | 1 | 1 @ $20.35 |
| Digi-Key | 283-3076-ND | 1 | 4 | 1 | 1 @ $30.30, 5 @ $28.86, 10 @ $26.70, 50 @ $23.09, 100 @ $21.64, 250 @ $20.20, 500 @ $18.76, 1000 @ $18.04 |
 NRI Industrial | D728088 | 1 | | 1 | 1 @ $40.77 |
 Raptor Supplies | AE2FJB | 1 | | 1 | 1 @ $16.75 |
 AmazonTP | B001VXY93Y | 1 | | 1 | 1 @ $19.44 |
 Newark | 63R7746 | 1 | 12 | 1 | 1 @ $57.58, 5 @ $56.15, 10 @ $54.70, 25 @ $51.82, 50 @ $48.94, 100 @ $46.07 |
| Newark | 99M4541 | 100 | | 100 | 100 @ $43.62, 250 @ $39.71 |
| AmazonSC | B01IIQ10N8 | 1 | | 1 | 1 @ $10.31 |
 Zoro | G7666678 | 1 | | 1 | 1 @ $202.18 |
| AmazonSC | B01F9H3AXC | 1 | | 1 | 1 @ $49.90 |
 Newark | 09WX6296 | 1 | | 1 | 1 @ $57.58, 5 @ $56.15, 10 @ $54.70, 25 @ $51.82, 50 @ $48.94, 100 @ $46.07 |
| French Gerleman | BUSSKTKR5 | 1 | | 1 | |
| Guardian | KTK-R-5 | 1 | | 1 | |
| uri.com | KTKR5 | 1 | -2 | 1 | 1 @ $38.76 |
 kempstoncontrols.co.uk | KTK-R-5 | 1 | 29 | 1 | 1 @ $25.21 |
 NRI Industrial | R668865 | 1 | 1 | 1 | 1 @ $51.27 |
| standardelectricsupply.com | 8070 | 1 | | 1 | 1 @ $39.16 |
 Radwell | KTK-R-5 | 1 | 6 | 1 | 1 @ $36.00 |
| Airline Hydraulics | 2030595 | 1 | | 1 | 1 @ $52.98 |
 steinerelectric.com | 5037 | 1 | | 1 | 1 @ $30.53 |
| Hutch and Son | KTK-R-5 | 1 | | 1 | |
 turtle.com | BUS KTK-R-5 | 1 | -2 | 1 | 1 @ $14.81 |
| Crescent Electric Supply Co | 1900773 | 1 | | 1 | |
| RS Delivers | 848-3911 | 1 | 44 | 1 | 1 @ $36.91, 5 @ $34.34, 25 @ $32.12, 50 @ $30.12, 100 @ $28.38 |
 galesburgelectric.com | KTK-R-5 | 1 | -2 | 1 | 1 @ $11.11 |
 Galco | BK/KTK-R-5-BUSS | 100 | | 100 | 1 @ $39.72 |
 globalcommercialparts.com | BUS_KTKR5 | 1 | 22 | 1 | 1 @ $22.78 |
 Galco | KTK-R-5-BUSS | 1 | 10 | 1 | 1 @ $23.30 |
| Crescent Electric Supply Co | KTK-R-5 | 1 | | 1 | |
| us.rs-online.com | 70150957 | 1 | 124 | 1 | 1 @ $53.96, 5 @ $51.39, 10 @ $47.53, 25 @ $44.32, 50 @ $41.11 |
 Tedss | 2026001298 | 1 | -2 | 1 | 1 @ $21.86 |
 mostelectric.com | KTK-R-5 | 1 | 18 | 1 | 1 @ $12.34 |
| Airline Hydraulics | BUSSMANN KTK-R-5 | 1 | | 1 | 1 @ $59.34 |
 National Supply Network | 74760455 | 10 | -2 | 10 | 1 @ $32.30 |
 Allfuses | KTK-R-5 | 1 | 585 | 1 | 1 @ $10.79 |
 superbreakers.com | KTK-R-5 | 1 | -2 | 1 | 1 @ $11.69 |
| Airline Hydraulics | BUSSMANN BK/KTK-R-5 | 1 | | 1 | 1 @ $59.34 |
| simplybreakers.com | KTK-R-5 | 1 | -2 | 1 | 1 @ $10.27 |
 cbtcompany.com | BK/KTK-R-5 | 1 | | 1 | |
 simsupply.com | ZO-G0798804 | 1 | 797 | 1 | 1 @ $33.55 |
 ebay.com_kiutbetz | KTK-R-5 | 1 | -2 | 1 | 1 @ $176.39 |
 ebay.com_bocollin4 | KTK-R-5 | 1 | -2 | 1 | 1 @ $120.62 |
 ebay.com_crimpsupply | KTK-R-5 | 1 | -2 | 1 | 1 @ $115.28 |
 ebay.com_jdykesj | KTK-R-5 | 1 | -2 | 1 | 1 @ $104.94 |
 ebay.com_industrialsurplus67 | KTK-R-5 | 1 | -2 | 1 | 1 @ $132.98 |
 ebay.com_premiumplc | KTK-R-5 | 1 | -2 | 1 | 1 @ $120.94 |
 Elliott Electric | KTKR5 | 1 | Call for Availability | 1 | 1 @ $35.33 |
 ebay.com_suitcaseandtoolbox | KTK-R-5 | 1 | -2 | 1 | 1 @ $109.98 |
| Ace Hardware | 3493186 | 1 | | 1 | 1 @ $169.99 |
| ebay.com | KTK-R-5 | 1 | -2 | 1 | |
