| Waldom | EATON BK1/GMA-300-R | 0.41 | 1 | 25 | | Eaton | | 0.41 @ 25 |
| us.rs-online.com | 74056405 | 0.54 | 1000 | 25 | | Eaton Electronics | | 0.54 @ 1000 |
| Digi-Key | 1877128 | 0.54186 | 1000 | 25 | 75 | Eaton - Electronics Division | | 0.54186 @ 1000 |
| Newark | 83R2787 | 0.65 | 1000 | 25 | | EATON BUSSMANN | | 0.65 @ 1000 |
| Radwell | GMA-300-R | 0.7 | 5 | 25 | | BUSSMANN | | 0.7 @ 25 |
| Hotenda | H574559 | 0.725 | 1 | 25 | | Eaton (formerly Cooper Bussmann) | | 0.725 @ 25 |
| Onlinecomponents.com | GMA-300-R | 0.97 | 1 | 609 | | BUSSMANN / EATON | | 0.97 @ 25 |
 | Walker Industrial | GMA-300-R | 1.09 | 5 | 25 | 17 | Cooper Bussmann | | 1.09 @ 25 |
| Arrow | BK/GMA-300-R | 1.18 | 1 | 180 | | Cooper Bussmann | | 1.18 @ 25 |
| Dale-Electric | GMA-300-R | 1.19 | 1 | 25 | | Cooper Bussmann | | 1.19 @ 25 |
 | Galco | BK/GMA-300-R-BUSS | 1.8 | 100 | 25 | | Bussmann | | 1.8 @ 100 |
 | Platt.com | 0964680 | 2.24 | 1 | 25 | | Eaton/Bussmann Series | | 2.24 @ 25 |
| Verical | GMA-300-R | 2.33 | 19 | 64 | | Cooper Bussmann | | 2.33 @ 25 |
 | crescentelectric.com | 170163 | 2.5 | 1 | 25 | | Eaton Bussmann series | | 2.5 @ 25 |
| Mouser | 504-GMA-300-R | 2.58 | 1 | 137 | | Cooper Bussmann | | 2.58 @ 25 |
 | superbreakers.com | GMA-300-R | 2.59 | 1 | 25 | | Eaton Bussmann | | 2.59 @ 25 |
| Superbreakers | GMA-300 | 2.59 | 1 | 25 | | EATON BUSSMANN | | 2.59 @ 25 |
 | Allfuses | GMA-300-R | 2.59 | 1 | 93 | | Bussmann | | 2.59 @ 25 |
 | swatee.com | GMA-300-R | 3.1 | 1 | 25 | | Eaton | | 3.1 @ 25 |
| Airline Hydraulics | BUSSMANN GMA-300-R | 3.71 | 1 | 25 | | Cooper Bussmann | | 3.71 @ 25 |
 | Raptor Supplies | AA9CPV | 4.0783275 | 1 | 25 | | BUSSMANN | | 4.0783275 @ 25 |
 | Carlton Bates Company | 05171264795 | 4.2 | 1 | 25 | | EATON BUSSMANN SERIES | | 4.2 @ 25 |
 | National Supply Network | 71917835 | 5.2796 | 5 | 25 | | Cooper Bussmann | | 5.2796 @ 25 |
| AmazonTP | B011NBBX32 | 5.9 | 1 | 25 | 20 | EATON BUSSMANN SERIES | | 5.9 @ 25 |
| AmazonSC | B003AU9CAQ | 5.99 | 1 | 25 | | Cooper Bussmann | | 5.99 @ 25 |
 | Zoro | G1329964 | 6.79 | 1 | 43 | | Eaton Bussmann | 0.01 | 6.79 @ 25 |
| standardelectricsupply.com | 2352254 | 8.85 | 1 | 25 | | Bussmann | | 8.85 @ 25 |
 | sustainablesupply.com | C1164561 | 11.93 | 1 | 25 | | Eaton | 0.01 | 11.93 @ 25 |
 | simsupply.com | ZO-G1329964 | 14.01 | 1 | 25 | | Eaton Bussmann | | 14.01 @ 25 |
 | turtle.com | BUS BK/GMA-300-R | 175.52 | 1 | 25 | | Eaton | | 175.52 @ 25 |
| Graybar | 25142058 | 221.6032 | 5 | 25 | | Bussmann (Eaton) | | 221.6032 @ 25 |
