Diodes Incorporated BZX84C22S-7

Overview

BZX84C22S-7 from Diodes Incorporated is a dual 200 mW surface-mount Zener diode in SOT-363 package, rated for nominal 22 V zener voltage (20.8–23.3 V at 5 mA), with 55 Ω dynamic impedance at test current and 0.1 µA max reverse leakage at 15.4 V. It serves as precision voltage reference or overvoltage clamp in low-power analog signal conditioning circuits.

For engineers reviewing the BZX84C22S-7 datasheet, BZX84C22S-7 pinout, BZX84C22S-7 application, or BZX84C22S-7 equivalent, key selection criteria include zener voltage tolerance, thermal resistance (625 °C/W), low-leakage operation below 15.4 V, and dual-diode configuration enabling bidirectional clamping or dual-reference designs.

Technical Context

This dual-element Zener diode integrates two independent 22 V zener junctions in a single SOT-363 package, sharing no internal connection-each anode/cathode pair operates independently. Its planar die construction ensures stable breakdown characteristics across -65 °C to +150 °C operating range.

Designed for low-current regulation and transient suppression, it delivers specified zener voltage at 5 mA test current with ±5% tolerance, temperature coefficient of +16.4 to +20.0 mV/°C, and maintains <0.1 µA reverse current up to 15.4 V.

Key Specifications

Pinout & Package

Package: SOT-363 (SC-70-6), ultra-small surface-mount plastic case, UL 94V-0 rated, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84C22S-7, MMBZ5242BS-7-F offers higher power but no dual-element integration, while BZX84C22LT1G matches zener voltage and impedance but requires two units to replicate dual functionality - making BZX84C22S-7 uniquely efficient for space-constrained dual-reference or bidirectional clamp designs.

Availability

BZX84C22S-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB port ESD clamp, and low-power IoT node voltage reference requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for BZX84C22S-7 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 and manufacturing operations across Asia and the Americas.

The BZX84C series belongs to Diodes' precision Zener diode product line, engineered for stable voltage reference and overvoltage protection in space-constrained, low-power applications across industrial, computing, and consumer electronics.

FAQ

What is the maximum continuous reverse voltage that can be safely applied to BZX84C22S-7 without breakdown?

The absolute maximum reverse voltage before breakdown is defined by its zener voltage specification: 22 V nominal, with a guaranteed range of 20.8 V to 23.3 V at 5 mA test current. Operation below 15.4 V ensures ≤0.1 µA reverse leakage, while sustained reverse bias above 23.3 V risks uncontrolled conduction and thermal runaway if power dissipation exceeds 200 mW.

How does the dual-diode configuration in SOT-363 affect PCB layout compared to two discrete SOT-23 Zeners?

The dual configuration reduces total footprint by ~40% versus two SOT-23 devices, eliminates inter-trace coupling between elements, and ensures matched thermal and voltage characteristics due to monolithic die construction. Layout requires only one set of thermal pads per device, simplifying solder paste stencil design and reflow profiling for consistent joint reliability.

Is BZX84C22S-7 suitable for use in automotive applications meeting AEC-Q200 requirements?

While BZX84C22S-7 operates across -65 °C to +150 °C and is RoHS-compliant, it is not officially qualified to AEC-Q200. For automotive cabin control or body electronics, Diodes' AEC-Q200-qualified equivalents like BZX84C22HE3-TP must be used - they undergo additional stress testing including temperature cycling, humidity bias, and mechanical shock validation.

Can BZX84C22S-7 be used as a bidirectional TVS for ±15 V signal lines?

Yes - with appropriate series current limiting, the dual configuration allows one Zener (C1/A1) to clamp positive transients to +22 V and the other (C2/A2) to clamp negative transients to −22 V relative to ground. Total capacitance is <15 pF per element at 1 MHz, supporting signal rates up to 480 Mbps in USB 2.0 applications when layout parasitics are controlled.