Taiwan Semiconductor Corporation BZT52C22-G RHG

Overview

BZT52C22-G RHG from Taiwan Semiconductor is a 22 V ±5% tolerance surface-mount Zener diode in SOD-123 package, rated for 350 mW power dissipation, 5 mA test current, and 55 Ω typical zener impedance at 5 mA, used for precision voltage regulation and overvoltage protection in low-power analog circuits.

For engineers reviewing the BZT52C22-G RHG datasheet, BZT52C22-G RHG pinout, BZT52C22-G RHG application, or BZT52C22-G RHG equivalent, key selection criteria include nominal zener voltage (22 V), tight 5% tolerance, low leakage (<0.1 µA at 15.4 V), thermal stability (−55°C to +150°C junction range), and SOD-123 footprint compatibility with automated assembly.

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. It features a single-die configuration with cathode band polarity marking and meets JESD201 Class 1A whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.

Its electrical behavior is defined by three critical operating points: zener voltage (20.8–23.3 V at 5 mA), dynamic impedance (55 Ω max at 5 mA), and temperature coefficient (+16.4 mV/°C at 5 mA), enabling predictable regulation performance across industrial ambient ranges.

Key Specifications

Pinout & Package

Package: SOD-123 - compact surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, and cathode band polarity indicator.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5247B-7-F and 1N4742A, BZT52C22-G RHG offers exact 22 V regulation in a moisture-insensitive SOD-123 package optimized for modern high-volume SMT production, whereas alternatives differ in voltage, package, or thermal rating-requiring redesign or derating.

Availability

BZT52C22-G RHG is available at Aetrix Electronics and suitable for overvoltage protection, precision reference generation, and low-power regulation applications requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for BZT52C22-G RHG 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

Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete devices, analog ICs, and power management solutions for industrial, computing, and consumer markets.

The BZT52C series targets cost-effective, high-reliability Zener regulation in space-constrained applications, emphasizing tight tolerance, robust thermal performance, and seamless integration into automated SMT lines.

FAQ

What is the nominal zener voltage and tolerance of BZT52C22-G RHG?

The BZT52C22-G RHG has a nominal zener voltage of 22 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 20.8 V and 23.3 V when tested at 5 mA. This specification is verified per Taiwan Semiconductor's C2007 datasheet and applies strictly to the BZT52C22-G RHG variant-not the broader BZT52C family. The tolerance ensures predictable regulation without calibration in production-grade analog circuits.

What package type and mounting method does BZT52C22-G RHG use?

BZT52C22-G RHG uses the SOD-123 surface-mount package with matte tin-plated leads compatible with J-STD-002 soldering standards. It is designed for reflow assembly and carries J-STD-020 Level 1 moisture sensitivity-no bake required prior to soldering. The cathode is marked by a visible band on the package body, and polarity must be observed during placement to ensure correct reverse-bias operation of the BZT52C22-G RHG.

What is the maximum power dissipation and thermal limit for BZT52C22-G RHG?

The BZT52C22-G RHG is rated for 350 mW maximum power dissipation at 25°C ambient and operates across a junction temperature range of −55°C to +150°C. Its junction-to-ambient thermal resistance is 357°C/W, meaning it can safely dissipate ~100 mW at 75°C ambient without exceeding 150°C junction temperature. Derating curves in the official datasheet define safe power limits above 25°C, critical for sustained operation of the BZT52C22-G RHG in enclosed enclosures.

How does the zener impedance of BZT52C22-G RHG affect regulation accuracy?

The BZT52C22-G RHG exhibits a typical zener impedance of 55 Ω at 5 mA test current, which directly impacts output voltage variation under changing load conditions. For example, a 1 mA load shift causes ~55 mV deviation in regulated voltage. Lower impedance improves regulation stiffness but increases cost and size; this value balances precision and economy for general-purpose use of the BZT52C22-G RHG in non-critical bias and protection roles.

Is BZT52C22-G RHG compliant with environmental and reliability standards?

Yes, BZT52C22-G RHG is RoHS compliant and halogen-free per IEC 61249-2-21. It passes JESD201 Class 1A whisker testing and carries UL 94V-0 flammability rating on its molding compound. These certifications confirm suitability for commercial, industrial, and automotive-qualified designs where long-term reliability and regulatory conformance are mandatory for the BZT52C22-G RHG.