BZX84C18

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BZX84C18

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DIODE ZENER 18V 200MW SOT-23

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Thông số kỹ thuật

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Package Tape & Reel (TR)
ProductStatus Active
Voltage-Zener(Nom)(Vz) 18 V
Tolerance ±5%
Power-Max 350 mW
Impedance(Max)(Zzt) 45 Ohms
Current-ReverseLeakage@Vr 100 nA @ 12.6 V
Voltage-Forward(Vf)(Max)@If 900 mV @ 10 mA
MountingType Surface Mount
Package/Case TO-236-3, SC-59, SOT-23-3

Tổng quan

Description

The BZX84C18 is an 18V Zener diode in a small SOT-23 surface-mount package, designed for voltage regulation and protection in low-power circuits. Key features:
- Voltage Regulation: Maintains a stable 18V output when reverse-biased at its breakdown voltage.
- Power Dissipation: Typically 350mW, suitable for low-current applications.
- Tolerance: ±5% voltage accuracy.
- Applications: Used for voltage clamping, ESD protection, and as a reference voltage in portable electronics, sensors, and power supplies.
Its compact size and reliability make it ideal for space-constrained designs. Always check the datasheet for precise specifications like current range (e.g., 5mA test current) and thermal considerations.

Equivalent

Equivalent products to the BZX84C18 (18V Zener diode, SOT-23 package) include:
- MMSZ5248B (18V, SOD-123)
- PZU18B2A (18V, SOD-323)
- BZT52C18 (18V, SOD-123)
- 1SMA5918BT3G (18V, SMA)
These alternatives match the 18V voltage rating and are available in similar small-signal packages. Check datasheets for exact specifications like power dissipation and tolerance.

Pinout

The BZX84C18 is a SOT-23 surface-mount 18V Zener diode with 3 pins (though only 2 are functional).
Pin Functions:
1. Pin 1 (Anode) – Connected to the positive terminal.
2. Pin 2 (Cathode) – Connected to the negative terminal.
3. Pin 3 (No Connection, NC) – Unused (may be internally tied or floating).
Key Features:
- Voltage Regulation: 18V nominal Zener voltage.
- Power Dissipation: Typically 250mW.
- Package: SOT-23 (small form factor).
Used for voltage clamping, regulation, and protection in low-power circuits.

Manufacturer

The BZX84C18 is a Zener diode manufactured by Nexperia, a leading semiconductor company specializing in high-performance discrete, logic, and MOSFET devices. Nexperia was originally part of NXP Semiconductors before becoming an independent entity in 2017.
Headquartered in the Netherlands, Nexperia focuses on efficiency and reliability, supplying components for automotive, industrial, and consumer electronics. The BZX84C18 is part of their broad portfolio of small-signal and protection devices.

Application

The BZX84C18 is an 18V Zener diode in a SOT-23 package, commonly used for:
1. Voltage Regulation – Stabilizing voltage in low-power circuits.
2. Overvoltage Protection – Safeguarding sensitive components.
3. Signal Clipping/Limiting – Shaping waveforms in audio/communication circuits.
4. Reference Voltage – Providing stable bias in precision analog designs.
5. Power Management – Used in portable devices, sensors, and IoT applications.
Its small size and low power dissipation make it ideal for compact, battery-operated electronics.

Package

The BZX84C18 is a SOD-323 (SC-76) surface-mount package Zener diode. This small, leadless package is designed for compact PCB applications, measuring approximately 1.7mm x 1.25mm x 0.95mm. It’s suitable for low-power voltage regulation with a 250mW power dissipation rating. The SOD-323 is widely used in space-constrained designs like mobile devices and IoT modules.

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