 Newark | 76K6391 | 500 | | 500 | 500 @ $2.78, 1000 @ $2.46, 2500 @ $2.29 |
| TME | KBU6D-E4/51 | 1 | | 1 | 1 @ $2.11, 5 @ $1.91, 25 @ $1.68, 100 @ $1.52, 250 @ $1.41 |
| RS Online | 6349216 | 1 | | 1 | |
| RS Delivers | 634-9216 | 1 | | 1 | 1 @ $4.92, 10 @ $3.94, 25 @ $3.45, 50 @ $3.19, 100 @ $2.70 |
| 1Source | KBU6D-E4/51 | 1 | | 1 | |
| Digi-Key | 604853 | 1000 | | 1000 | 1 @ $2.43, 10 @ $2.18, 100 @ $1.76, 500 @ $1.44, 1000 @ $1.24 |
 Mouser | 625-KBU6D-E4 | 1 | 21 | 1 | 1 @ $4.16, 10 @ $3.75, 100 @ $3.07, 1000 @ $2.20, 10000 @ $2.07 |
| Hotenda | H1804290 | 1 | 1000 | 1 | 1 @ $3.79, 10 @ $3.40, 25 @ $3.22, 100 @ $2.79, 250 @ $2.65, 500 @ $2.37 |
| iodParts | KBU6D-E4/51 | 500 | 2250 | 500 | 500 @ $1.15, 750 @ $1.11, 1250 @ $1.08 |