Ce bloc est un modèle simple pour le transistor bipolaire NPN basé sur le modèle Ebers-Moll.
| Paramètre | Valeur par défaut | Description |
| Bf | 50 | Forward beta |
| Br | 0.1 | Reverse beta |
| Is | 1.e-16 | Transport saturation current [A] |
| Vak | 0.02 | Early voltage (inverse), 1/Volt [1/V] |
| Tauf | 0.12e-9 | Ideal forward transit time [s] |
| Taur | 5e-9 | Ideal reverse transit time [s] |
| Ccs | 1e-12 | Collector-substrat(ground) cap. [F] |
| Cje | 0.4e-12 | Base-emitter zero bias depletion cap. [F] |
| Cjc | 0.5e-12 | Base-coll. zero bias depletion cap. [F] |
| Phie | 0.8 | Base-emitter diffusion voltage [V] |
| Me | 0.4 | Base-emitter gradation exponent |
| Phic | 0.8 | Base-collector diffusion voltage [V] |
| Mc | 0.333 | Base-collector gradation exponent |
| Gbc | 1e-15 | Base-collector conductance [S] |
| Gbe | 1e-15 | Base-emitter conductance [S] |
| Vt | 0.02585 | Voltage equivalent of temperature [V] |
| EMin | -100 | if x < EMin, the exp(x) function is linearized |
| EMax | 40 | if x > EMax, the exp(x) function is linearized |