BC817-25,215

BC817-25 and BC817-215 are gain-graded variants of the BC817 general-purpose NPN transistor. The BC817 family is used for low- to medium-current switching and amplification in consumer, automotive, and industrial electronics. Typical specs (varies by grade and supplier): Vceo about 45 V; continuous collector current in the ~0.5–0.8 A range; DC current gain (hFE) depends on the grade and is specified for a given Ic (often around a few mA). The suffixes “-25” and “-215” designate different gain bands within the BC817 family, i.e., different hFE ranges. Exact values (hFE, max Ic, power dissipation, etc.) depend on the supplier and the specific grade; refer to the manufacturer’s datasheet for the precise specs of BC817-25 and BC817-215. If you share the supplier, I can pull exact figures.

Equivalent products to BC817-25/BC817-215 are other NPN general‑purpose transistors with similar Vce and Ic. Common substitutes include:
- BC847B (Nexperia) – same NPN family (SOT-23)
- BC547B (NXP) – TO‑92
- 2N3904 or MMBT3904 – standard through‑hole/SMD
- 2N2222A or MMBT2222A – higher Ic options
Note: always verify hFE range and packaging to match your application.

BC817-25/215 are NPN general-purpose transistors in a TO-92 package (BC817 family), with higher gain variants.
Key features:
- Ic max: 500 mA
- Vceo: 45 V
- Ptot: ~0.3–0.4 W (at 25°C)
- Gain (hFE): grouped by bin; BC817-25/215 indicates higher gain variants; typical ranges are broad (roughly 100–800 depending on Ic and temperature)
- fT: ~300 MHz
- BvCBO: ~60 V; BvEBO: ~5 V
- Operating temp: −55°C to +150°C
- Package: TO-92, usually RoHS compliant
- Applications: general-purpose amplification and switching, drivers, audio, signal conditioning
Note: Exact hFE and performance vary with bin (25/215) and operating conditions.

Pin count: 3 pins.
Function: General-purpose NPN bipolar junction transistor (BC817 family) used for switching and amplification in low-power circuits (TO-92 package).

BC817-25 and BC817-215 are general-purpose NPN transistors. Key specs: Vce ≈ 45 V, Ic up to ~0.5 A; gain variants (-25, -215) differ in hFE. Applications:
- Low-power switching (relays, LEDs, logic stages)
- Small-signal amplification (audio preamps, sensor signals)
- Microcontroller interfaces and level shifting
- Sensor conditioning and driver stages
- Portable/embedded equipment and general Purpose transistor switches
(Use in TO‑92 or suitable SMD variants per package.)

BC817-25 (and BC817-215) are the BC817 NPN small-signal transistors in the SOT-23 (SOT-23-3) surface-mount package.