Specs side by side
2 parts compared · 13 differing specs across 14 total parameters.
| Parameter | ||
|---|---|---|
| Supply voltage | - | VCEO 50V; IC 150mA; documented hFE bins (O / Y / GR). |
| Memory & Peripherals | - | PNP counterpart in the same system is the KSA733. |
| Compatibility Level | - | 100% Drop-in (Zero Code Change) |
| Component Category | Small-Signal Transistors (Japanese Standard) | - |
| Core & Architecture | - | onsemis registered version of the 2SC945: same 50V / 150mA ratings and same E-C-B lead order, with full datasheet documentation. |
| Firmware Notes | - | The choice when the customer documentation chain requires a registered type number rather than a Japanese house number. Electrically interchangeable with the C945. |
| Hardware Notes | - | TO-92 E-C-B, same as the original. |
| Lead Time Advantage | - | Shenzhen Spot Stock (24-48h Dispatch) |
| Market Reality | The 2SC945 / 2SA733 pair is the Japanese-standard small-signal transistor of a generation of industrial controls, audio equipment and instruments - and it remains a daily repair item in Chinese production too, where the shorthand names C945 and A733 are stencilled on half the boards. Supply is continuous through second-source fabs, but three naming systems collide on this part: the C945 shorthand, the rank letters (O / Y / GR / BL), and the Japanese E-C-B pin order that is the mirror of the European C-B-E parts people try to substitute. | - |
| Reference Part | - | 2SC945 / 2SA733 |
| Role In Circuit | Original Reference Part | - |
| Sourcing Advantage | - | onsemi line stock; consistent documentation for aerospace/industrial paperwork. |
| Sourcing Status | Active Shenzhen Spot Sourcing (24–48h) | - |
| Case | TO-92 | TO-92 |
Parts
- 2SC945 / 2SA733 · renesas
- KSC945C · onsemi