BZX84-C33

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BZX84-C33

BZX84 SERIES - VOLTAGE REGULATOR

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  • Mfr. Parte #BZX84-C33
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Descripción general

Description

BZX84-C33 is a small-signal Zener diode with a nominal Zener voltage of 33 V from the BZX84 family. It’s a low-power device (about 0.5 W) used for voltage regulation, reference, or clamping in simple power-supply and protection circuits.
Key points:
- Vz ≈ 33 V (breakdown voltage in reverse bias)
- Power rating ~0.5 W; suitable for low-power applications
- Typically operated in reverse bias to hold the node at about 33 V when the current is within the specified range (test current ≈ several mA)
- Tolerance commonly around ±5% (C variant; exact tolerance depends on manufacturer)
- Used as a reference or to protect inputs by clamping any voltage that exceeds ~33 V
How to use: connect the diode in reverse across the rail with a current-limiting resistor; the diode conducts when the rail reaches ~33 V, keeping voltage near that level. The cathode is the end with the band.

Features

- Type: Zener diode (BZX84-C33)
- Nominal Zener voltage: 33 V
- Power rating: 0.5 W
- Package: SOT-23 (3-pin)
- Tolerance: ±5% (C suffix)
- Operating temp: typically -55°C to +125°C
- Applications: voltage regulation, references, overvoltage protection, clamping in small-signal circuits
- Reverse breakdown at ~33 V; IZ test current typically around 5 mA (dynamic impedance specified at IZ)

Package

Package depends on the manufacturer. BZX84-C33 is commonly supplied as an SMD Zener in very small SOD-523 or sometimes SOT-23 packages. Check the specific datasheet.

Pinout

- Pin count: 3 pins (SOT-23 SMD). Electrically it is a two‑terminal device (anode and cathode); the third pin is either tied to the cathode or left unused depending on the manufacturer/package variant.
- Function: BZX84‑C33 is a 3.3 V Zener diode used for voltage reference/clamping and transient suppression. It conducts in reverse at ≈3.3 V to limit or regulate voltage in low‑power circuits (typical power rating ~300–500 mW depending on datasheet).

Manufacturer

BZX84-C33 is a common SMD Zener diode part number made by multiple suppliers (e.g., Diodes Incorporated, Vishay, Nexperia, ON Semiconductor). A typical manufacturer, Diodes Incorporated (Diodes Inc.), is a global semiconductor company that designs and manufactures discrete semiconductor components and analog ICs (diodes, transistors, MOSFETs, logic and power-management devices).

Application

BZX84-C33 is a 33 V Zener diode (SMD). Typical applications:
- Shunt regulator and voltage reference around 33 V in low-power circuits
- Overvoltage protection and line clamping on power rails or signal lines
- Transient/spike suppression in automotive/industrial power supplies
- Reference/bias for comparators, regulators, and high-voltage bias networks

Equivalent

Common equivalents to the BZX84‑C33 (33 V Zener) are:
- BZT52C33 (Vishay)
- BZX84C33 from other vendors (Diodes Inc., Nexperia, ON Semiconductor)
- BZV55‑C33 (through‑hole axial)
Any 33 V Zener with matching package, power dissipation and test current (Vz ≈33 V, same Pd and Iz/IzT) is a functional equivalent.

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