onsemi SZBZX84C3V6LT1G

Overview

SZBZX84C3V6LT1G from onsemi is a 3.6 V ±5% Zener diode in SOT-23 package, rated for 250 mW power dissipation on FR-5 board, with 90 Ω dynamic impedance at 5 mA test current and −3.5 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in portable power rails.

For engineers reviewing the SZBZX84C3V6LT1G datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance (±5%), low leakage (≤1 μA @ 1 V), ESD robustness (>16 kV HBM), thermal coefficient stability, and SOT-23 footprint compatibility with high-density PCB layouts.

Technical Context

This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at 3.6 V with tight regulation across 1–20 mA operating range. Its SOT-23 package features anode (Pin 1), no connection (Pin 2), and cathode (Pin 3), enabling unidirectional clamping without series resistors in low-current biasing.

Designed for automotive-grade reliability (AEC-Q101 qualified), it delivers stable regulation under thermal stress (−65°C to +150°C junction range) and supports Pb-free reflow soldering up to 260°C for 10 seconds. The −3.5 mV/°C temperature coefficient ensures predictable drift in ambient-varying environments.

Key Specifications

Pinout & Package

SOT-23 (TO-236) surface-mount plastic package, 2.90 mm × 1.30 mm × 1.00 mm body size, void-free thermosetting case with corrosion-resistant finish and UL 94 V-0 flammability rating. Cathode indicated by polarity band.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SZBZX84C3V6LT1G, BZX84C3V6LT1G offers identical electrical performance but omits automotive qualification and controlled change management, while SZBZX84C3V3LT1G shifts the regulation point downward by 0.3 V without altering thermal behavior or package constraints.

Availability

SZBZX84C3V6LT1G is available at Aetrix Electronics and suitable for portable power supervision, USB interface protection, and automotive sensor biasing requiring stable component supply across extended temperature ranges and high-volume production cycles.

Supply support for SZBZX84C3V6LT1G 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, and consumer markets.

SZBZX84C3V6LT1G belongs to the SZBZX84CxxxLT1G automotive Zener regulator family, engineered to deliver AEC-Q101-compliant voltage reference and protection in space-constrained, thermally demanding environments.

FAQ

What is the Zener voltage tolerance of SZBZX84C3V6LT1G?

The SZBZX84C3V6LT1G has a nominal Zener voltage of 3.6 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 3.4 V and 3.8 V when tested at 5 mA. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet, and applies across the full operating temperature range of −65°C to +150°C. The SZBZX84C3V6LT1G maintains this specification under standard FR-5 board conditions.

Is SZBZX84C3V6LT1G suitable for automotive applications?

Yes, SZBZX84C3V6LT1G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications such as engine control unit sensor biasing, infotainment power monitoring, and ADAS subsystem voltage clamping. The "SZ" prefix explicitly denotes automotive-grade manufacturing controls, unique site traceability, and change management - features not present in the standard BZX84C3V6LT1G variant. Its −65°C to +150°C junction temperature range further supports under-hood deployment.

What is the pin configuration of SZBZX84C3V6LT1G?

SZBZX84C3V6LT1G uses the SOT-23 package with Pin 1 = Anode, Pin 2 = No Connection (internally unconnected), and Pin 3 = Cathode - as defined in the Marking Diagram and Mechanical Characteristics section of the onsemi datasheet. The cathode is marked by a polarity band on the package body. Pin 2 must remain unconnected on the PCB; routing traces to it may cause functional failure or measurement error.

What is the maximum power dissipation for SZBZX84C3V6LT1G?

SZBZX84C3V6LT1G is rated for 250 mW total power dissipation on FR-5 board at 25°C ambient temperature, derating linearly by 2.0 mW/°C above that point. On alumina substrate, it supports 300 mW at 25°C with 2.4 mW/°C derating. These values are specified in the Maximum Ratings table (page 2) and define the thermal boundary for continuous DC operation - exceeding them risks parametric shift or permanent damage.

Does SZBZX84C3V6LT1G have ESD protection built-in?

Yes, SZBZX84C3V6LT1G has an ESD rating of Class 3 (>16 kV) per Human Body Model, as stated in the Features section of the onsemi datasheet. This level of immunity allows direct integration into ESD-prone interfaces like USB, audio jacks, and button inputs without requiring additional external TVS diodes in many designs. The rating was verified per JEDEC JS-001-2017 test methodology and applies to both anode and cathode terminals.