| Distributor | SKU | Stock | Cost | |
|---|---|---|---|---|
| DigiKey | TIP31CGOS-ND | 12818 | $1.03 | Buy |
| DigiKey | TIP31CS-ND | 0 | $0.62 | Buy |
| Mouser Electronics | 863-TIP31 | 0 | Buy | |
| Mouser Electronics | 610-TIP31 | 1652 | $1.25 | Buy |
| Quarktwin Electronic Components | TIP31 | 13181 | $0.45 | Buy |
| Verical Marketplace | TIP31 | 1100 | $0.43 | Buy |
| Farnell | TIP31 | 3489 | * $0.37 | Buy |
| Utmel | TIP31 | 1200 | $0.18 | Buy |
| AVNET Express | TIP31 | 3489 | $0.33 | Buy |
| Jak Electronics | TIP31 | 1200 | $1.29 | Buy |
| Quest Components | TIP31 | 28 | $1.20 | Buy |
NPN Bipolar Power Transistor