Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

onsemi SZBZX84C3V3LT3G

Name: SZBZX84C3V3LT3G
Brand: onsemi
SKU: SZBZX84C3V3LT3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: SZBZX84C3V3LT3G

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: TO-236-3, SC-59, SOT-23-3

Datasheet:: SZBZX84C3V3LT3G.pdf

Description:: DIODE ZENER 3.3V 250MW SOT23-3

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:25,900

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

SZBZX84C3V3LT3G from onsemi is a 3.3 V ±6% Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C, with 95 Ω dynamic impedance at 5 mA test current and −3.5 mV/°C temperature coefficient - used for precision voltage reference and overvoltage protection in low-power portable electronics.

For engineers reviewing the SZBZX84C3V3LT3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±6%), thermal coefficient, leakage current (≤1 μA at 1 V), and automotive-grade AEC-Q101 qualification.

Technical Context

This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp or regulate voltage at its nominal 3.3 V Zener point. Its design targets stable DC biasing and transient suppression in space-constrained circuits where low leakage (<1 μA @ 1 V) and tight thermal drift (−3.5 mV/°C) are critical.

The SOT-23 package enables high-density placement on FR-4 PCBs, with thermal resistance of 500 °C/W (junction-to-ambient) and ESD robustness exceeding 16 kV (HBM Class 3). It is Pb-free, RoHS-compliant, and qualified to AEC-Q101 for automotive applications.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.1 V to 3.5 V at I_ZT = 5 mA - defines regulation window for 3.3 V nominal reference
Power Dissipation	250 mW on FR-5 board at 25°C - sets maximum continuous power handling before thermal derating
Zener Impedance (Z_ZT)	95 Ω at I_ZT = 5 mA - determines regulation accuracy under varying load current
Reverse Leakage Current	≤1 μA at V_R = 1 V - ensures minimal quiescent current in standby or bias networks
Temperature Coefficient	−3.5 mV/°C at I_ZT = 5 mA - quantifies voltage drift across operating temperature range
Capacitance	450 pF at V_R = 0 V, f = 1 MHz - impacts high-frequency noise filtering and signal integrity
ESD Rating	HBM Class 3 (>16 kV) - supports robust handling in automated assembly and end-use environments

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 band on terminal 3.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	Forward-biased terminal; connects to lower-potential node during regulation
2	No Connection	Internally unconnected; must remain floating - no PCB trace or pad required
3	Cathode	Reverse-biased terminal; connects to regulated voltage node or clamping point

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive applications including infotainment and body control modules
Tight thermal coefficient	−3.5 mV/°C enables stable reference performance across −65°C to +150°C junction range
Low leakage current	≤1 μA at 1 V reverse bias minimizes parasitic loading in high-impedance sensor interfaces
Pb-free & RoHS compliance	Meets global environmental regulations without compromising solderability or reliability
High ESD immunity	Class 3 HBM (>16 kV) eliminates need for external ESD protection in handheld designs

Applications

USB Power Rail Clamp	Microcontroller Reset Circuit
Use Scenario: Clamping 3.3 V USB VBUS line against ESD transients and overvoltage events in portable accessories. IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and transient voltage suppressor at the input rail. Use Value: Prevents damage to downstream USB interface ICs by clamping excursions above 3.5 V with <1 μA leakage at nominal 3.3 V.	Use Scenario: Generating a clean, temperature-stable reset threshold for 3.3 V microcontrollers in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Precision voltage reference defining the reset assertion level for integrated POR circuitry. Use Value: Ensures reliable reset release at 3.1–3.5 V across temperature, leveraging −3.5 mV/°C coefficient for predictable trip-point shift.
Automotive Sensor Biasing	Low-Power ADC Reference
Use Scenario: Providing stable bias voltage to analog sensors (e.g., pressure or temperature transducers) in engine control units. IC Role / Device Role / Timing Role: Low-drift Zener reference source for sensor excitation and signal conditioning stages. Use Value: Maintains sensor accuracy over wide ambient range (−40°C to +125°C) due to AEC-Q101 qualification and controlled TC.	Use Scenario: Supplying reference voltage to 10-bit SAR ADCs in wearables and medical monitors requiring <1% full-scale error. IC Role / Device Role / Timing Role: Passive voltage reference establishing ADC's V_REF with minimal supply current draw. Use Value: Delivers 3.3 V ±6% stability with 95 Ω Z_ZT, reducing code-dependent reference error in low-noise measurement paths.

USB Power Rail Clamp

Microcontroller Reset Circuit

Use Scenario: Clamping 3.3 V USB VBUS line against ESD transients and overvoltage events in portable accessories.

IC Role / Device Role / Timing Role: Zener diode acting as shunt regulator and transient voltage suppressor at the input rail.

Use Value: Prevents damage to downstream USB interface ICs by clamping excursions above 3.5 V with <1 μA leakage at nominal 3.3 V.

Use Scenario: Generating a clean, temperature-stable reset threshold for 3.3 V microcontrollers in battery-powered IoT nodes.

IC Role / Device Role / Timing Role: Precision voltage reference defining the reset assertion level for integrated POR circuitry.

Use Value: Ensures reliable reset release at 3.1–3.5 V across temperature, leveraging −3.5 mV/°C coefficient for predictable trip-point shift.

Automotive Sensor Biasing

Low-Power ADC Reference

Use Scenario: Providing stable bias voltage to analog sensors (e.g., pressure or temperature transducers) in engine control units.

IC Role / Device Role / Timing Role: Low-drift Zener reference source for sensor excitation and signal conditioning stages.

Use Value: Maintains sensor accuracy over wide ambient range (−40°C to +125°C) due to AEC-Q101 qualification and controlled TC.

Use Scenario: Supplying reference voltage to 10-bit SAR ADCs in wearables and medical monitors requiring <1% full-scale error.

IC Role / Device Role / Timing Role: Passive voltage reference establishing ADC's V_REF with minimal supply current draw.

Use Value: Delivers 3.3 V ±6% stability with 95 Ω Z_ZT, reducing code-dependent reference error in low-noise measurement paths.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84C3V3LT1G	Same electrical specs but 3,000-piece tape-and-reel packaging; lacks SZ-prefix AEC-Q101 validation	Targeted at commercial-grade consumer electronics, not automotive systems	Select when AEC-Q101 is not required and smaller reels reduce inventory overhead
SZBZX84C3V3LT1G	Identical Zener parameters and AEC-Q101 qualification, but shipped in 3,000-unit reels instead of 10,000	Preferred for prototyping or low-volume production where reel size impacts setup time	Choose for evaluation or pilot builds where 10,000-unit reels exceed immediate demand

Compared with BZX84C3V3LT1G and SZBZX84C3V3LT1G, the SZBZX84C3V3LT3G offers identical Zener performance and automotive qualification while optimizing for high-volume manufacturing via 10,000-unit tape-and-reel delivery - reducing changeover frequency and supporting JIT assembly lines.

Availability

SZBZX84C3V3LT3G is available at Aetrix Electronics and suitable for USB power management, microcontroller reset generation, automotive sensor biasing, and low-power ADC reference applications requiring stable component supply and long-term lifecycle support.

Supply support for SZBZX84C3V3LT3G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, and IoT applications.

The SZBZX84CxxxLTxG series is part of onsemi's automotive-qualified Zener diode portfolio, engineered specifically for robust voltage regulation in harsh-environment electronics where reliability, thermal stability, and AEC-Q101 compliance are mandatory.

FAQ

What is the Zener voltage tolerance of SZBZX84C3V3LT3G?

The SZBZX84C3V3LT3G has a nominal Zener voltage of 3.3 V with a tolerance of ±6%, meaning its actual breakdown voltage falls between 3.1 V and 3.5 V when tested at 5 mA (IZT). This tolerance is specified per the BZX84Cxxx standard series and applies across the full operating temperature range of −65°C to +150°C. The SZBZX84C3V3LT3G datasheet confirms this range in Table 3 under "VZ1 (Volts) @ IZT1 = 5 mA".

Is SZBZX84C3V3LT3G qualified for automotive use?

Yes, SZBZX84C3V3LT3G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the "Features" section of the onsemi datasheet. The "SZ" prefix denotes devices meeting automotive-specific site and control change requirements. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD - making SZBZX84C3V3LT3G suitable for under-hood and cabin electronics in passenger vehicles and commercial fleets.

What is the pin configuration of SZBZX84C3V3LT3G?

SZBZX84C3V3LT3G uses the SOT-23 package with pinout defined as: Pin 1 = Anode, Pin 2 = No Connection (unbonded, must be left floating), Pin 3 = Cathode (marked by polarity band). This configuration is confirmed in the "Mechanical Characteristics" section and "Marking Diagram" of the datasheet, and matches Style 8 in the SOT-23 outline drawing (CASE 318).

How does the temperature coefficient affect SZBZX84C3V3LT3G performance?

The SZBZX84C3V3LT3G has a temperature coefficient of −3.5 mV/°C at IZT = 5 mA, meaning its Zener voltage decreases by approximately 3.5 mV for every 1°C rise in junction temperature. This behavior is documented in the Electrical Characteristics table and Figure 1 of the datasheet. For example, at +85°C ambient (assuming typical thermal rise), the regulated voltage shifts ~−210 mV from its 25°C value - a critical factor in precision biasing applications.

What packaging option does SZBZX84C3V3LT3G use?

SZBZX84C3V3LT3G ships in 10,000-unit tape-and-reel format (Pb-free, RoHS-compliant), as specified in the "Ordering Information" table on page 1 of the datasheet. This contrasts with the LT1G variant (3,000 units/reel) and supports high-throughput SMT assembly lines by minimizing reel changeovers. The "T3G" suffix directly indicates the 10,000-piece tape-and-reel packaging.

SZBZX84C3V3LT3G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: SZBZX84CxxxLT1G

Package/Case:: TO-236-3, SC-59, SOT-23-3

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 3.3 V

Tolerance:: ±6%

Power - Max:: 250 mW

Impedance (Max) (Zzt):: 95 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 1 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -65°C ~ 150°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOT-23-3 (TO-236)

SZBZX84C3V3LT3G FAQ

1.How can I place an order for SZBZX84C3V3LT3G through Aetrix?

Please submit a Request for Quotation (RFQ) for SZBZX84C3V3LT3G on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SZBZX84C3V3LT3G reliable?

The price and inventory of SZBZX84C3V3LT3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C3V3LT3G is usually 5 days.

3.What payment methods are accepted for SZBZX84C3V3LT3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C3V3LT3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZBZX84C3V3LT3G?

SZBZX84C3V3LT3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZBZX84C3V3LT3G order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SZBZX84C3V3LT3G?

For technical support, including SZBZX84C3V3LT3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C3V3LT3G requirements.

6.How does Aetrix verify that SZBZX84C3V3LT3G is sourced from the original manufacturer or authorized distributors?

All SZBZX84C3V3LT3G products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SZBZX84C3V3LT3G meets industry standards.

7.What is the process for return or replacement of SZBZX84C3V3LT3G?

All SZBZX84C3V3LT3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C3V3LT3G, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SZBZX84C3V3LT3G part is unused and in its original packaging.

Return procedure for SZBZX84C3V3LT3G:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…