Diodes Incorporated BZX84C22Q-7-F

Overview

BZX84C22Q-7-F from Diodes Incorporated is an automotive-grade 22 V, 350 mW surface-mount Zener diode in SOT23 package, designed for precision voltage regulation and overvoltage protection in low-power analog and digital circuits. It delivers a nominal Zener voltage of 22 V at 5 mA test current, with ±5% tolerance (20.8–23.3 V), 250 Ω maximum Zener impedance at 5 mA, and <0.1 µA reverse leakage at 15.4 V.

For engineers reviewing the BZX84C22Q-7-F datasheet, BZX84C22Q-7-F pinout, BZX84C22Q-7-F application, or BZX84C22Q-7-F equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (357 °C/W), AEC-Q101 qualification, SOT23 footprint compatibility, and automotive temperature range (-65 °C to +150 °C).

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and supply conditions. Its planar die construction ensures consistent parametric performance and reliability across automotive temperature extremes.

It features a low thermal resistance of 357 °C/W when terminals are held at ambient temperature, enabling stable operation up to 150 °C junction temperature. The device exhibits a negative temperature coefficient of −3.5 mV/°C below 6 V and near-zero drift above 6 V - for the 22 V variant, no temperature coefficient is specified in the datasheet, confirming voltage stability across operating range.

Key Specifications

Pinout & Package

Package: SOT23 - three-terminal surface-mount plastic package with matte tin-plated alloy 42 leadframe; moisture sensitivity level 1 per J-STD-020; weight ≈ 0.008 g.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMSZ5247B-TP and BZX84-C22LT1G, BZX84C22Q-7-F offers guaranteed AEC-Q101 qualification with 3 k/reel automotive tape configuration, making it the sole choice for Tier 1 automotive production where traceability, qualification, and packaging consistency are mandatory.

Availability

BZX84C22Q-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, consumer power adapter feedback loops, and medical diagnostic equipment requiring stable component supply with full AEC-Q101 traceability and green compliance.

Supply support for BZX84C22Q-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, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.

This device belongs to the BZX84C series of automotive-qualified Zener diodes, engineered specifically for voltage regulation and transient suppression in harsh-environment electronics where reliability, small size, and regulatory compliance are critical.

FAQ

What is the maximum power dissipation for BZX84C22Q-7-F at 85°C ambient?

At 85°C ambient, the device's power dissipation must be derated linearly from 350 mW at 25°C using the 357 °C/W thermal resistance. The allowable power is calculated as 350 mW × (1 − (85 − 25)/357) ≈ 210 mW. This ensures junction temperature remains ≤150°C under steady-state conditions.

Is BZX84C22Q-7-F compatible with lead-free reflow profiles?

Yes - the device uses matte tin finish over alloy 42 leadframe and is qualified for Pb-free soldering per JEDEC J-STD-020. It withstands peak reflow temperatures up to 260°C for 10 seconds and complies with IPC/JEDEC G-102 guidelines for moisture sensitivity level 1 handling.

Does this Zener diode have a specified capacitance value?

No - the datasheet does not list total capacitance for the BZX84C22Q-7-F variant. Figure 5 shows typical capacitance trends across the series, estimating ~15–20 pF for 22 V devices at 1 V reverse bias, but this is not a guaranteed parameter and should not be used in high-frequency design assumptions.

How is the "Q" suffix in BZX84C22Q-7-F interpreted?

The "Q" denotes automotive qualification per AEC-Q101 standards. It distinguishes this part from standard-grade versions (e.g., BZX84C22-7-F) and confirms full stress testing including HTOL, TCT, ESD, and mechanical shock - required for inclusion in automotive OEM BOMs.