SS8050 vs S8050
Short answer: Yes — if the load current is within S8050 limits (typically ≤ ~0.5–0.7 A depending on vendor).
- Voltage: 12 V is OK (Vce(max) ≈ 25 V).
- Current: keep Ic ≤ ~0.5 A (check vendor datasheet).
- Base drive: use Ib ≈ Ic/10 for saturation; Rb = (Vdrive − Vbe)/Ib.
- Inductive loads: add flyback diode.
- If Ic > ~0.4–0.7 A (continuous) → use SS8050 (if rated) or better a logic-level N-MOSFET.
SOT-23
S8050 NPN Transistor Truth Table
| Base (B) | Collector (C) | Emitter (E) | Transistor State | Collector-Emitter Current |
|---|---|---|---|---|
| LOW | HIGH | LOW | OFF (Cutoff) | 0 |
| HIGH | HIGH | LOW | ON (Saturation) | Flows (ON) |
Notes:
- Base HIGH: A small current applied to the base (typically >0.7V above emitter) turns the transistor ON, allowing current to flow from collector to emitter.
- Base LOW: No base current keeps the transistor OFF, and no current flows from collector to emitter.
- Collector is usually connected to a positive voltage, emitter to ground.