| Equivalent | BUX18 | |
| Type | Transistor Silicon NPN | |
| Case | TO3 | |
| Manufacturer | RCA - Harris | |
| Vbr CEO | 375 | |
| Max. PD (W) | 120 | |
| t(f) Max. (S) | 600n | |
| Max. hFE | 100 | |
| Min hFE | 15 | |
| Ic Max. (A) | 8.0 | |
| @Ic (test) (A) | 1.0 | |
| Icbo Max. @Vcb Max. (A) | 3.0m+ | |
| Polarity | NPN | |
| R(sat) (Û) | 375m | |
| Derate Above 25°C | 684m | |
| Oper. Temp (°C) Max. | 175 | |
| @VCE (V) | 5.0 | |
| Pinout Equivalence Number | 3-14 | |
| Surface Mounted Yes/No | NO | |
| Maximum Collector Power Dissipation (Pc) | 80 W | |
| Maximum Collector-Base Voltage |Vcb| | 475 V | |
| Maximum Collector-Emitter Voltage |Vce| | 375 V | |
| Maximum Emitter-Base Voltage |Veb| | 6 V | |
| Maximum Collector Current |Ic max| | 8 A | |
| Max. Operating Junction Temperature (Tj) | 200 °C | |
| Forward Current Transfer Ratio (hFE), MIN | 10 | |
| SKU | 139872 | |