| RS Delivers | 537-1256 | 0.4428 | 1 | 1270 | | Eaton | | 0.4428 @ 100 |
  | Newark | 48K9869 | 0.83 | 100 | 100 | | EATON BUSSMANN | | 0.83 @ 100 |
  | Digi-Key | 283-3398-ND | 0.926 | 1 | 100 | | Eaton - Electronics Division | | 0.926 @ 100 |
| Radwell | BKS500400R | 1.16 | 100 | 100 | | BUSSMANN | | 1.16 @ 100 |
| Onlinecomponents.com | BK/S500-400-R | 1.66 | 1 | 560 | | BUSSMANN / EATON | | 1.66 @ 100 |
  | Walker Industrial | S500-400-R | 1.82 | 5 | 100 | 17 | Cooper Bussmann | | 1.82 @ 100 |
| Waldom | EATON BK/S500-400-R | 1.86 | 1 | 100 | | Eaton | | 1.86 @ 100 |
  | AI Consolidated | S500-400-R-BUSSMANN | 1.99 | 1 | 100 | | Bussmann Eaton Cooper Fuses | 0.0156 | 1.99 @ 100 |
| Dale-Electric | S500-400-R | 2.0 | 1 | 100 | | Cooper Bussmann | | 2.0 @ 100 |
| Hotenda | H575929 | 2.25 | 1 | 100 | | Eaton (formerly Cooper Bussmann) | | 2.25 @ 100 |
  | Galco | BK/S500-400-R-BUSS | 2.68 | 100 | 100 | | Bussmann | | 2.68 @ 100 |
| crescentelectric.com | 148686 | 4.21 | 1 | 100 | | Eaton Bussmann series | | 4.21 @ 100 |
  | Platt.com | 0957196 | 5.37 | 1 | 100 | | Eaton/Bussmann Series | | 5.37 @ 100 |
| us.rs-online.com | 71930765 | 12.11 | 100 | 100 | | Eaton Electronics | | 12.11 @ 100 |
  | Zoro | G3119042 | 12.55 | 1 | 100 | | Eaton Bussmann | 0.02 | 12.55 @ 100 |
  | sustainablesupply.com | C1177062 | 18.52 | 1 | 100 | | Eaton | 0.02 | 18.52 @ 100 |
  | simsupply.com | ZO-G3119042 | 20.82 | 1 | 100 | | Eaton Bussmann | | 20.82 @ 100 |
  | Raptor Supplies | AB8XFF | 34.593156 | 1 | 100 | | BUSSMANN | | 34.593156 @ 100 |
  | Amazon | B011NNAR8M | 122.53 | 1 | 100 | | Eaton Bussmann | | 122.53 @ 100 |
  | turtle.com | BUS BK/S500-400-R | 300.76 | 1 | 100 | | Eaton | | 300.76 @ 100 |