| Equivalent | 2N21 | |
| Type | Transistor Germanium PNP | |
| Case | TO22 | |
| Manufacturer | Western Electric | |
| Vbr CBO | 100 | |
| Max. PD (W) | 120m | |
| hfe | 1.8 | |
| Ic Max. (A) | 40m | |
| Icbo Max. @Vcb Max. (A) | 2.2m | |
| Polarity | PNP | |
| Trans. Freq (Hz) Min. | 2.0M | |
| @VCE (test) (V) | 10i | |
| Oper. Temp (°C) Max. | 100 | |
| @Ic (A) | 1.0m | |
| Pinout Equivalence Number | N/A | |
| Surface Mounted Yes/No | NO | |
| Maximum Collector Power Dissipation (Pc) | 0.12 W | |
| Maximum Collector-Base Voltage |Vcb| | 100 V | |
| Maximum Collector-Emitter Voltage |Vce| | 100 V | |
| Maximum Collector Current |Ic max| | 0.04 A | |
| Max. Operating Junction Temperature (Tj) | 85 °C | |
| Transition Frequency (ft): | 1 MHz | |
| Forward Current Transfer Ratio (hFE), MIN | 30 | |
| SKU | 590010 | |