onsemi SZBZX84B16LT1G

Overview

SZBZX84B16LT1G from onsemi is a 16 V ±2% tight-tolerance Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board, with 40 Ω dynamic impedance at 5 mA test current and 0.05 μA reverse leakage at 11.2 V. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.

For engineers reviewing the SZBZX84B16LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±2%), thermal coefficient (+10.4 mV/°C), ESD robustness (>16 kV HBM), and SOT-23 footprint compatibility with high-density PCB layouts.

Technical Context

This device operates in reverse breakdown mode to maintain stable voltage regulation across varying load and temperature conditions. Its tight 2% V_Z tolerance (15.7–16.3 V) and low 40 Ω Zener impedance at 5 mA enable accurate clamping in feedback loops and reference circuits.

The SZBZX84B16LT1G features an ESD rating of Class 3 (>16 kV HBM), Pb-free construction compliant with RoHS, and AEC-Q101 qualification for automotive applications. Its SOT-23 package supports automated assembly and delivers thermal resistance of 500 °C/W on FR-5 board.

Key Specifications

Pinout & Package

SOT-23 (TO-236) surface-mount plastic package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting case with corrosion-resistant finish. Cathode indicated by polarity band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BZX84B16LT1G and SZBZX84C16LT1G, the SZBZX84B16LT1G uniquely combines automotive qualification, ±2% tolerance, and identical thermal/electrical specs - making it the sole option for safety-critical 16 V reference applications requiring both precision and AEC-Q101 validation.

Availability

SZBZX84B16LT1G is available at Aetrix Electronics and suitable for portable power management, automotive sensor interfaces, and industrial IoT node protection requiring stable component supply and long-term lifecycle support.

Supply support for SZBZX84B16LT1G 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The SZBZX84BxxxLT1G series belongs to onsemi's automotive-qualified Zener regulator portfolio, designed specifically for precision voltage reference and overvoltage protection in harsh-environment applications demanding AEC-Q101 compliance and tight parametric control.

FAQ

What is the Zener voltage tolerance of SZBZX84B16LT1G?

The SZBZX84B16LT1G has a tight Zener voltage tolerance of ±2%, with a specified range of 15.7 V to 16.3 V at 5 mA test current. This tighter tolerance compared to standard Zener series (e.g., ±5% for SZBZX84C16LT1G) makes SZBZX84B16LT1G suitable for applications requiring high-voltage accuracy without external trimming. The tolerance is guaranteed across the full operating temperature range per onsemi's AEC-Q101 qualification testing.

Is SZBZX84B16LT1G qualified for automotive applications?

Yes, SZBZX84B16LT1G is AEC-Q101 qualified and PPAP capable, confirming its suitability for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. The "SZ" prefix explicitly denotes devices meeting unique site and control change requirements for automotive supply chains. Its junction temperature range of −65°C to +150°C and validated reliability under thermal cycling and humidity testing support under-hood deployment.

What is the maximum power dissipation of SZBZX84B16LT1G on FR-5 board?

SZBZX84B16LT1G is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient, derating linearly at 2.0 mW/°C above that temperature. This corresponds to a thermal resistance of 500 °C/W junction-to-ambient. At 85°C ambient, the usable power drops to 130 mW. These values assume standard JEDEC-defined board layout and soldering conditions per onsemi's datasheet Note 1.

Does SZBZX84B16LT1G have a no-connect pin, and how should it be handled in PCB layout?

Yes, SZBZX84B16LT1G has Pin 2 designated as "No Connection" per its mechanical outline (Style 8). This terminal is internally unconnected and must remain electrically floating in the PCB layout - no copper pour, trace, or thermal pad should contact it. Incorrect connection risks internal shorting or unpredictable regulation behavior. The active terminals are Pin 1 (Anode) and Pin 3 (Cathode), with cathode identified by the polarity band on the package.

What is the ESD rating of SZBZX84B16LT1G, and how is it tested?

SZBZX84B16LT1G has an ESD rating of Class 3 per the Human Body Model (HBM), exceeding 16 kV. This rating is verified per ANSI/ESDA/JEDEC JS-001 and confirmed during AEC-Q101 stress testing. The high ESD immunity stems from onsemi's proprietary process design and packaging, enabling direct integration into exposed I/O paths (e.g., USB, button inputs, sensor lines) without supplemental TVS diodes in most portable and automotive applications.