BZX84-C15,215

BZX84-C15 is a 15 V Zener diode in an SOT-23 package, part of the BZX84-C family. It’s used for low‑power voltage regulation, shunt regulation, reference, and over‑voltage protection in small circuits.
Key specs (typical):
- Nominal Zener voltage Vz ≈ 15 V (tolerance for the C variant ~ ±5%).
- Test current Izt ≈ 5 mA.
- Zener impedance Zzt ≈ 60 Ω (typ) at Izt.
- Power rating Ptot ≈ 500 mW.
- Temp range roughly −55 to +125 °C.
Pinout: in SOT‑23, there are three pins but only two are used for the diode; the third can be NC. Check the datasheet for the exact pin assignment and orientation.
About “215”: there is no standard BZX84-C15,215 variant; you may be referring to a tolerance/lot code or a different voltage (e.g., 21 V). If you share the exact part number or datasheet, I can confirm.

Typical equivalents for BZX84‑C15 (15V SOT‑23 Zener) are: BZX84C15 from other manufacturers (Vishay, Diodes Inc., Nexperia), BZT52‑C15 (same electrical rating in other SMD packages), MMBZ/MMBZJ 15V Zener variants (500 mW SMD), and 1N4744A (15V, 1W through‑hole — higher power). Always verify package, power dissipation, knee impedance and tolerance in datasheets before substitution.

BZX84-C15 is a 15 V Zener diode (0.5 W) in the BZX84 family. Key features:
- Nominal Zener voltage: 15 V
- Power rating: 0.5 W (Ptot)
- Tolerance: C-series (±5%)
- Package: small SMD two-terminal diode (BZX84 series)
- Reversed breakdown voltage specified at Iz ≈ 5 mA
- Temperature range: typically -55°C to +150°C
- Reverse leakage small below Vz
- Applications: voltage regulation/reference, overvoltage/clamping protection
- RoHS compliant and widely available across voltage variants for design flexibility

Three pins (SOT-23). It is a 15 V Zener diode (BZX84-C15) used for regulation/protection. Pin 2 is the anode; pins 1 and 3 are the cathode (cathode connected to both pins).

Manufacturer: Diodes Incorporated (Diodes Inc.).
What kind of company: Diodes Inc. is a global semiconductor manufacturer and supplier that designs and produces discrete semiconductors, power-management devices, analog and mixed‑signal ICs, and other components for consumer, computing, industrial and automotive markets. Headquartered in Plano, Texas, it is a publicly traded company (NASDAQ: DIOD).

BZX84-C15 and BZX84-C21 are 0.5 W Zener diodes (SOT-23) with nominal voltages of 15 V and 21 V. Typical applications:
- Shunt voltage regulators and fixed references in simple power supplies, op-amp biasing, ADC/DAC references
- Overvoltage and transient protection by clamping voltages on rails and I/O lines
- Input protection and level-shifting for microcontrollers and ICs
- Signal limiting/clip protection in analog/sensor circuits
- Temperature-stable bias networks where a known reference is needed
Note: use a suitable series resistor to limit current; respect IZK/IZM ratings.

SOT-23 (3-pin) surface-mount package.