| Sager Electronics | BK1/S501-500-R | 0.516 | 1000 | 10 | | Eaton | | 0.516 @ 1000 |
| Avnet | BK1-S501-500-R | 0.55 | 1000 | 10 | | Eaton | | 0.55 @ 1000 |
| RS Delivers | 537-1559 | 1.1436 | 1 | 460 | | Eaton | | 1.1436 @ 10 |
| Hotenda | H574791 | 1.305 | 1 | 10 | | Eaton (formerly Cooper Bussmann) | | 1.305 @ 10 |
  | Radwell | S501-500-R | 1.56 | 5 | 10 | | BUSSMANN | | 1.56 @ 10 |
| specialtycontrolsystems.com | S501-500-R | 1.8 | 1 | 195 | | BUSSMAN | | 1.8 @ 10 |
| Onlinecomponents.com | S501-500-R | 2.08 | 1 | 900 | | Bussmann / Eaton | | 2.08 @ 10 |
  | swatee.com | BK/S501-500-R | 2.09 | 1 | 29 | | Eaton | | 2.09 @ 10 |
| Arrow | S501-500-R | 2.167 | 1 | 10 | | Cooper Bussmann | | 2.167 @ 10 |
  | Walker Industrial | S501-500-R | 2.19 | 5 | 10 | 10 | Cooper Bussmann | | 2.19 @ 10 |
  | AI Consolidated | S501-500-R-BUSSMANN | 2.38 | 1 | 10 | | Bussmann Eaton Cooper Fuses | 0.0187 | 2.38 @ 10 |
| Dale-Electric | S501-500-R | 2.4 | 1 | 10 | | Cooper Bussmann | | 2.4 @ 10 |
| Waldom | EATON S501-500-R | 2.62 | 1 | 10 | | Eaton | | 2.62 @ 10 |
  | Galco | BK/S501-500-R-BUSS | 3.2 | 100 | 10 | | Bussmann | | 3.2 @ 100 |
| us.rs-online.com | 74057115 | 3.65 | 5 | 10 | | Eaton Electronics | | 3.65 @ 10 |
  | Newark | 92K9990 | 4.25 | 10 | 3435 | | EATON BUSSMANN | | 4.25 @ 10 |
| Mouser | 504-S501-500-R | 4.97 | 1 | 62 | | Cooper Bussmann | | 4.97 @ 10 |
| crescentelectric.com | 491750 | 5.04 | 1 | 10 | | Eaton Bussmann series | | 5.04 @ 10 |
  | Platt.com | 0966679 | 5.23 | 1 | 27 | | Eaton/Bussmann Series | | 5.23 @ 10 |
| Graybar | 25141466 | 5.5552 | 5 | 10 | | Bussmann (Eaton) | | 5.5552 @ 10 |
| AmazonTP | B003ATTZX6 | 5.9 | 1 | 10 | 1 | Cooper Bussmann | | 5.9 @ 10 |
  | Digi-Key | 7718523 | 6.818 | 5 | 10 | | Eaton - Electronics Division | | 6.818 @ 10 |
  | Zoro | G0524054 | 14.75 | 1 | 45 | | Eaton Bussmann | 0.02 | 14.75 @ 10 |
| standardelectricsupply.com | 2331284 | 17.85 | 1 | 10 | | Bussmann | | 17.85 @ 10 |
  | sustainablesupply.com | C1176988 | 24.67 | 1 | 10 | | Eaton | 0.02 | 24.67 @ 10 |
| AmazonSC | B011NNGLM8 | 33.93 | 1 | 10 | | Eaton Bussmann | 1.0 | 33.93 @ 10 |
  | Raptor Supplies | AB8WUA | 40.760928 | 1 | 10 | | BUSSMANN | | 40.760928 @ 10 |
  | turtle.com | BUS BK/S501-500-R | 359.11 | 1 | 10 | | Eaton | | 359.11 @ 10 |