| ebay.com | S501-3.15-R | 1 | -2 | 1 | |
| ebay.com | S501-3.15-R | 1 | -2 | 1 | |
 Newark | 92K9987 | 10 | 1935 | 10 | 10 @ $1.92, 25 @ $1.36, 50 @ $1.06, 100 @ $0.87, 250 @ $0.72 |
| Newark | 26P5608 | 250 | 7 | 250 | 250 @ $1.24 |
 simsupply.com | ZO-G1084614 | 1 | 47 | 1 | 1 @ $23.67 |
 Walker Industrial | S501-3-15-R | 5 | 3 to 5 Days | 5 | 1 @ $2.19 |
| Dale-Electric | S501-3.15-R | 1 | | 1 | 1 @ $2.40 |
| Graybar | 25142698 | 5 | | 5 | 1 @ $3.99 |
 Zoro | G1084614 | 1 | 76 | 1 | 1 @ $15.75 |
 Raptor Supplies | AB8WTY | 1 | | 1 | 1 @ $41.45 |
| Waldom | EATON ELECTRONICS BK1/S501-3.15-R | 1 | | 1 | |
 Platt.com | 0966674 | 1 | | 1 | 1 @ $5.23 |
| crescentelectric.com | 98626 | 1 | | 1 | 1 @ $5.04 |
| us.rs-online.com | 74057100 | 1000 | | 1000 | 1000 @ $0.71 |
 Digi-Key | 2173080 | 1 | | 1 | 1000 @ $0.72 |
| Crescent Electric Supply Co | 2204223 | 1 | | 1 | |
| Grainger | 2AAK4 | 1 | | 1 | |
 Zoro | G605879985 | 8 | | 8 | 1 @ $0.95 |
| RS Online | 1699424 | 1 | | 1 | |
| us.rs-online.com | 74057113 | 5 | | 5 | 5 @ $3.65 |
| RS Online | 5371414 | 1 | | 1 | |
| RS Delivers | 537-1414 | 1 | 2030 | 1 | 1 @ $0.38 |
| 1Source | S501-3.15-R | 1 | | 1 | |
| Galco | S501-3.150-R | 1 | | 1 | |
| Waldom | EATON ELECTRONICS S501-3.15-R | 1 | | 1 | 1 @ $2.92, 2 @ $2.78, 3 @ $2.72, 5 @ $2.62 |
| Waldom | EATON BK1/S501-3.15-R | 1 | | 1 | 1 @ $0.54, 250 @ $0.52, 500 @ $0.51, 1000 @ $0.49, 5000 @ $0.48 |
| Waldom | EATON S501-3.15-R | 1 | | 1 | 1 @ $2.92, 2 @ $2.78, 3 @ $2.72, 5 @ $2.62 |
| sustainablesupply.com | C1176986 | 1 | -2 | 1 | 1 @ $21.99 |
 AI Consolidated | S501-3-15-R-BUSSMANN | 1 | -2 | 1 | 1 @ $2.38 |
| Hotenda | H576381 | 1 | | 1 | 1 @ $1.44, 5 @ $1.40, 10 @ $1.30, 50 @ $1.08, 100 @ $0.90, 250 @ $0.88, 500 @ $0.74 |
 Onlinecomponents.com | S501-3.15-R | 1 | 40 | 1 | 1 @ $2.22, 25 @ $2.11, 100 @ $2.00, 500 @ $0.84, 1000 @ $0.62 |