Diodes Incorporated BZX84C22W-7-F

Overview

BZX84C22W-7-F from Diodes Incorporated is a 22 V, 5 mA nominal Zener diode in SOT-323 package, rated for 200 mW power dissipation, with zener voltage tolerance ±5% (20.8–23.3 V), 55 Ω dynamic impedance at test current, and operating temperature range −65 °C to +125 °C. It provides precision voltage regulation in low-power biasing, reference, and overvoltage protection circuits.

For engineers reviewing the BZX84C22W-7-F datasheet, BZX84C22W-7-F pinout, BZX84C22W-7-F application, or BZX84C22W-7-F equivalent, key selection criteria include zener voltage accuracy at 5 mA, thermal resistance (625 K/W), reverse leakage (<0.1 µA at 15.4 V), temperature coefficient (+16.4 to +20.0 mV/°C), and RoHS-compliant green molding compound.

Technical Context

This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current of 5.0 mA. Its planar die construction ensures stable long-term performance and low noise under DC bias conditions.

The device exhibits a positive temperature coefficient (+16.4 to +20.0 mV/°C) above 5.1 V, enabling predictable drift compensation in reference designs. Thermal derating begins at 25 °C ambient, with full 200 mW rating only at TA ≤ 25 °C per the published power derating curve.

Key Specifications

Pinout & Package

Package: SOT-323 - ultra-small surface-mount plastic case (2.0–2.2 mm length × 1.15–1.35 mm width × 0.25–0.40 mm thickness), UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener voltage regulation applications.

Compared with MMBZ5247BS-7-F and BZX84-C22LT1G, BZX84C22W-7-F offers optimal balance of ultra-compact SOT-323 size, 55 Ω low-impedance regulation, and guaranteed green material compliance-making it preferred for high-density, low-power reference and clamp designs where thermal and spatial constraints dominate.

Availability

BZX84C22W-7-F is available at Aetrix Electronics and suitable for voltage reference design, overvoltage protection, microcontroller reset conditioning, and LED current regulation requiring stable component supply and consistent parametric performance across production batches.

Supply support for BZX84C22W-7-F includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, industry-standard components for power management, signal integrity, and protection.

The BZX84 series belongs to Diodes' standard Zener diode product line, engineered for cost-effective, high-volume voltage regulation and clamping in consumer, industrial, and automotive electronics.

FAQ

What is the maximum reverse voltage this Zener can sustain before breakdown?

The BZX84C22W-7-F has a nominal zener voltage of 22 V with a guaranteed range of 20.8 V to 23.3 V at 5 mA test current. Breakdown occurs within this band; operation above 23.3 V risks exceeding power limits unless current is strictly limited by external series resistance. Absolute maximum reverse voltage is not defined beyond the zener range.

Is this part suitable for use in automotive applications?

Yes-BZX84C22W-7-F meets AEC-Q200 stress test requirements for passive components when qualified per Diodes' automotive-grade variants. While the standard -7-F version is not AEC-Q200 certified, its −65 °C to +125 °C operating range, green RoHS compliance, and robust SOT-323 package make it widely deployed in non-safety-critical automotive subsystems like body control modules and sensor interfaces.

How does temperature affect its zener voltage stability?

This device exhibits a positive temperature coefficient of +16.4 to +20.0 mV/°C at 5 mA. For every 10 °C rise above 25 °C, the zener voltage increases by approximately 164–200 mV. Designers must account for this drift in precision references; compensation techniques (e.g., pairing with negative-TC components) may be needed for <0.1% total error over wide temperature ranges.

Can it replace a 24 V Zener in an existing design?

No-BZX84C22W-7-F is specifically rated for 22 V nominal regulation. Substituting it for a 24 V Zener (e.g., BZX84C24W-7-F) would reduce clamping/reference voltage by ~2 V, potentially causing undervoltage faults or incorrect biasing. Always match nominal zener voltage and verify impedance, power, and temperature coefficient compatibility before substitution.