// multi-utility computation suite · offline · instant · precise
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sci.BJT-current-gain Calculator
Calculates BJT DC current gain β = IC/IB and α = IC/IE = β/(β+1) from transistor operating point. Typical small-signal BJT β ranges from 20 to 500 — β varies with temperature and collector current.
Inputs
Ic Ma
Rate of charge flow (A). I = V/R. Above ~100 mA through the body can be lethal. Fuses protect against overcurrent.
Ib Ua
Rate of charge flow (A). I = V/R. Above ~100 mA through the body can be lethal. Fuses protect against overcurrent.
Vce V
Electric potential difference (V). Drives current through a circuit. Household: 120 V (US) or 230 V (EU/UK).
Vbe V
Electric potential difference (V). Drives current through a circuit. Household: 120 V (US) or 230 V (EU/UK).
Results
current gain β (hFE)
Electric charge flow rate (A). Governs wire sizing — too much current causes dangerous heating. Fuses protect circuits from overcurrent.
alpha α = β/(1+β)
pH of the solution. Below 7: acidic. 7: neutral. Above 7: basic (alkaline).
emitter current Ie (mA)
Electric charge flow rate (A). Governs wire sizing — too much current causes dangerous heating. Fuses protect circuits from overcurrent.
transconductance gm (mS)
Sample size or count used in the calculation.
input resistance rπ (Ω)
Opposition to current flow (Ω). Ohm's Law: V = IR. Lower resistance means more current for the same voltage.