Taiwan Semiconductor Corporation BZT52B16-G

Overview

BZT52B16-G from Taiwan Semiconductor is a 16 V ±2% tolerance surface-mount Zener diode in SOD-123 package, rated for 410 mW total power dissipation, with 40 Ω dynamic impedance at 5 mA test current and 0.1 µA leakage current at 11.2 V reverse voltage. It serves as a precision voltage reference or low-voltage stabilizer in DC/DC converters and adapter circuits.

For engineers reviewing the BZT52B16-G datasheet, BZT52B16-G pinout, BZT52B16-G application, or BZT52B16-G equivalent, key selection criteria include its tight 2% V_Z tolerance, SOD-123 thermal performance (R_θJA = 357 °C/W), cathode-band polarity marking, and compatibility with J-STD-002 soldering standards.

Technical Context

The BZT52B16-G operates as a single-die, silicon planar Zener diode optimized for stable reverse-biased voltage regulation. Its 16 V nominal breakdown voltage is specified at I_ZT = 5 mA, with Zener impedance (Z_ZT) of 40 Ω and knee impedance (Z_ZK) of 200 Ω at I_ZK = 1 mA.

It supports operation across -55°C to +150°C junction temperature range, features a positive temperature coefficient of +10.4 mV/°C at I_ZTC = 5 mA, and complies with RoHS and halogen-free requirements per IEC 61249-2-21.

Key Specifications

Pinout & Package

SOD-123 package: two-terminal, cathode indicated by band; anode and cathode terminals are unmarked except for cathode band; leads are matte tin plated and solderable per J-STD-002.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBZ5245B-7-F and 1N4744A, the BZT52B16-G offers tighter 2% tolerance and SOD-123 compatibility for modern space-constrained PCBs, while delivering sufficient 410 mW power handling for most low-power reference applications without thermal derating.

Availability

BZT52B16-G is available at Aetrix Electronics and suitable for adapter power supplies, on-board DC/DC converters, and low-voltage stabilizer circuits requiring stable component supply, consistent parametric performance, and RoHS-compliant sourcing.

Supply support for BZT52B16-G 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 components for industrial, computing, and consumer markets.

The BZT52B series is designed specifically for high-accuracy, surface-mount voltage reference and stabilization in compact power conversion systems, emphasizing tight tolerance, thermal reliability, and process consistency.

FAQ

What is the nominal Zener voltage and tolerance of the BZT52B16-G?

The BZT52B16-G has a nominal Zener voltage of 16 V with a guaranteed tolerance of ±2%, specified as 15.68 V (min) to 16.32 V (max) at I_ZT = 5 mA. This tight tolerance enables direct use in precision reference applications without trimming or calibration, distinguishing it from wider-tolerance alternatives like ±5% Zeners commonly found in general-purpose designs.

What package type and mounting style does the BZT52B16-G use?

The BZT52B16-G uses the SOD-123 surface-mount package - a compact 2.7 mm × 1.6 mm outline with 1.1 mm height - featuring matte tin-plated leads compliant with J-STD-002 solderability requirements. Its cathode is marked by a visible band, and it is designed for reflow soldering in automated PCB assembly lines without moisture preconditioning (MSL Level 1).

What is the maximum power dissipation and thermal resistance of the BZT52B16-G?

The BZT52B16-G has a maximum total power dissipation (P_tot) of 410 mW at T_A = 25°C and a junction-to-ambient thermal resistance (R_θJA) of 357 °C/W. This means that under natural convection on a standard FR-4 PCB, the device can sustain full-rated power only up to ~45°C ambient before reaching its 150°C maximum junction temperature, making thermal layout consideration essential in high-density designs.

How does the BZT52B16-G perform in terms of leakage current and dynamic impedance?

The BZT52B16-G exhibits 0.1 µA maximum leakage current at 11.2 V reverse voltage and a dynamic impedance (Z_ZT) of 40 Ω at 5 mA test current. These values ensure minimal loading of high-impedance reference nodes and stable regulation under varying load conditions - critical for feedback accuracy in switching regulators and precision analog circuits where the BZT52B16-G is deployed.

Is the BZT52B16-G suitable for automotive or extended-temperature applications?

Yes, the BZT52B16-G is rated for junction temperatures from -55°C to +150°C and meets J-STD-020 moisture sensitivity Level 1, supporting reflow-compatible automotive module assembly. While not AEC-Q200 qualified out-of-box, its robust thermal and electrical specifications make it suitable for under-hood and industrial control applications where extended temperature operation and long-term parametric stability are required - provided system-level qualification is performed.