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

onsemi SZBZX84C3V6ET1G

Name: SZBZX84C3V6ET1G
Brand: onsemi
SKU: SZBZX84C3V6ET1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZBZX84C3V6ET1G

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: SZBZX84C3V6ET1G.pdf

Description:: DIODE ZENER 3.6V 225MW SOT23-3

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Product details

Overview

SZBZX84C3V6ET1G from onsemi is a 3.6 V ±0.2 V Zener diode in SOT-23 package, rated for 250 mW power dissipation at 25°C on FR-5 board, with 90 Ω dynamic impedance at 5 mA test current and 40 µA max reverse leakage at 2.7 V, used for precision voltage reference and overvoltage protection in portable power rails.

For engineers reviewing the SZBZX84C3V6ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5.6%), temperature coefficient (−3.5 mV/°C), ESD rating (>16 kV HBM), junction-to-ambient thermal resistance (500 °C/W on FR-5), and automotive qualification per AEC-Q101.

Technical Context

This device operates as a two-terminal voltage reference diode with cathode-anode polarity, exhibiting sharp reverse breakdown at nominal 3.6 V with minimal voltage drift over temperature due to its negative temperature coefficient. It delivers stable regulation under low-current conditions (1–20 mA test range) and supports transient suppression via 225 W peak pulse capability (8 × 20 µs).

The SOT-23 package enables high-density mounting on compact PCBs while maintaining thermal performance up to +150°C junction temperature. Its Pb-free construction and RoHS compliance meet modern environmental requirements without compromising electrical stability or solderability.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.4 V to 3.8 V @ 5 mA - ensures tight regulation window for 3.3 V rail clamping and reference buffering
Power Dissipation	250 mW @ T_A = 25°C on FR-5 - defines maximum continuous DC power handling before thermal derating begins
Zener Impedance (Z_ZT)	90 Ω @ 5 mA - indicates low AC impedance for stable voltage under small-signal ripple conditions
Reverse Leakage Current	5 µA @ V_R = 2.7 V - confirms minimal standby current draw in undervoltage detection circuits
Temperature Coefficient	−3.5 mV/°C @ 5 mA - quantifies predictable downward voltage shift with rising ambient temperature
ESD Rating	Class 3 (>16 kV HBM) - provides robust electrostatic discharge immunity during board assembly and end-use
Peak Pulse Power	225 W (8 × 20 µs) - supports transient surge absorption in I/O line protection applications

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, UL 94 V-0 flammability rating, cathode marked by band on terminal 3.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	Connected to lower-potential node; forward-biased during normal conduction, reverse-biased during Zener operation
2	No Connection	Internally unconnected; must remain floating-no PCB trace or pad should tie to this terminal
3	Cathode	Connected to higher-potential node; carries reverse current during regulation; marked by polarity band

Key Features

Feature	Design Value
AEC-Q101 Qualified	Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock
Pb-Free & RoHS Compliant	Meets EU Directive 2011/65/EU and J-STD-609 Category 3 moisture sensitivity level (MSL3)
Optimized for Automated Assembly	Standard SOT-23 footprint compatible with pick-and-place machines and reflow profiles up to 260°C for 10 s
High-Density Footprint	Small 2.90 × 1.30 mm outline enables placement in space-constrained areas like smartphone PMIC sections
Stable Low-Voltage Regulation	3.6 V nominal Zener point with <±5.6% tolerance supports accurate 3.3 V system rail monitoring and clamping

Applications

USB Port Overvoltage Protection	Smartphone Battery Monitoring
Use Scenario: Protecting USB data/power lines from accidental 5 V surges or miswired chargers. IC Role / Device Role / Timing Role: Zener clamp placed between VBUS and GND to shunt excess voltage above 3.6 V. Use Value: Prevents damage to downstream USB transceivers by limiting transient voltage to safe levels within 10 ns response time.	Use Scenario: Providing stable reference for battery fuel gauge ADC inputs in lithium-ion powered devices. IC Role / Device Role / Timing Role: Precision voltage reference source feeding into analog front-end of battery management IC. Use Value: Enables ±1% state-of-charge accuracy across −40°C to +85°C due to predictable −3.5 mV/°C TC compensation.
IoT Sensor Node Voltage Reference	Industrial PLC Input Conditioning
Use Scenario: Supplying regulated bias voltage to low-power MEMS sensors in wireless sensor nodes. IC Role / Device Role / Timing Role: Low-quiescent-current Zener reference for op-amp biasing and ADC reference divider networks. Use Value: Delivers stable 3.6 V output with only 5 µA leakage at 2.7 V, extending battery life beyond 5 years in sleep-mode operation.	Use Scenario: Clamping analog input signals from field transducers exposed to EMI-induced spikes. IC Role / Device Role / Timing Role: Front-end protection element placed before instrumentation amplifier input stage. Use Value: Absorbs 225 W transient pulses without degradation, preserving signal integrity and preventing ADC saturation.

USB Port Overvoltage Protection

Smartphone Battery Monitoring

Use Scenario: Protecting USB data/power lines from accidental 5 V surges or miswired chargers.

IC Role / Device Role / Timing Role: Zener clamp placed between VBUS and GND to shunt excess voltage above 3.6 V.

Use Value: Prevents damage to downstream USB transceivers by limiting transient voltage to safe levels within 10 ns response time.

Use Scenario: Providing stable reference for battery fuel gauge ADC inputs in lithium-ion powered devices.

IC Role / Device Role / Timing Role: Precision voltage reference source feeding into analog front-end of battery management IC.

Use Value: Enables ±1% state-of-charge accuracy across −40°C to +85°C due to predictable −3.5 mV/°C TC compensation.

IoT Sensor Node Voltage Reference

Industrial PLC Input Conditioning

Use Scenario: Supplying regulated bias voltage to low-power MEMS sensors in wireless sensor nodes.

IC Role / Device Role / Timing Role: Low-quiescent-current Zener reference for op-amp biasing and ADC reference divider networks.

Use Value: Delivers stable 3.6 V output with only 5 µA leakage at 2.7 V, extending battery life beyond 5 years in sleep-mode operation.

Use Scenario: Clamping analog input signals from field transducers exposed to EMI-induced spikes.

IC Role / Device Role / Timing Role: Front-end protection element placed before instrumentation amplifier input stage.

Use Value: Absorbs 225 W transient pulses without degradation, preserving signal integrity and preventing ADC saturation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84C3V6ET1G	Non-automotive grade; lacks AEC-Q101 qualification and PPAP documentation	Suitable for consumer electronics but not automotive or industrial safety-critical systems	Select when cost sensitivity outweighs automotive qualification requirements
MMSZ4684T1G	Same 3.6 V nominal Zener, but 350 mW power rating and 50 Ω Z_ZT @ 5 mA	Better thermal margin and lower impedance for higher-precision references	Prefer where tighter voltage stability and higher pulse energy handling are required

Compared with SZBZX84C3V6ET1G, BZX84C3V6ET1G offers identical electrical specs but no automotive traceability, while MMSZ4684T1G trades smaller SOD-123 footprint for improved regulation performance-making it suitable for upgraded reference designs where layout space allows.

Availability

SZBZX84C3V6ET1G is available at Aetrix Electronics and suitable for automotive infotainment systems, handheld medical monitors, and industrial IoT gateways requiring stable component supply with full AEC-Q101 compliance and long-term lifecycle support.

Supply support for SZBZX84C3V6ET1G 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 is a global semiconductor supplier focused on energy-efficient innovation, delivering silicon solutions for automotive, industrial, cloud, and intelligent edge applications.

SZBZX84C3V6ET1G belongs to the BZX84CxxxET1G/SZBZX84CxxxET1G family-engineered for compact, reliable voltage regulation in space-constrained portable and automotive electronics where low leakage, high ESD immunity, and thermal stability are critical.

FAQ

What is the Zener voltage tolerance of SZBZX84C3V6ET1G?

The SZBZX84C3V6ET1G has a Zener voltage range of 3.4 V to 3.8 V at 5 mA test current, corresponding to a ±0.2 V absolute tolerance or ±5.6% relative tolerance around the nominal 3.6 V value. This tolerance is verified per onsemi's Electrical Characteristics table and applies under standard test conditions (T_A = 25°C, pulsed measurement). The SZBZX84C3V6ET1G maintains this specification across its qualified operating temperature range.

Is SZBZX84C3V6ET1G suitable for automotive applications?

Yes, SZBZX84C3V6ET1G is AEC-Q101 qualified and PPAP capable, with full automotive-grade process controls, traceability, and reliability testing-including temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. The "SZ" prefix explicitly denotes automotive and other applications requiring unique site and control change requirements, making SZBZX84C3V6ET1G appropriate for use in engine control units, ADAS sensors, and infotainment systems.

What is the thermal resistance of SZBZX84C3V6ET1G on FR-5 board?

The junction-to-ambient thermal resistance (R_JA) of SZBZX84C3V6ET1G is 500 °C/W when mounted on an FR-5 board, based on the manufacturer's Maximum Ratings table. This value assumes a standard 1.0 × 0.75 × 0.62 inch board and defines the thermal gradient between junction and ambient air under natural convection. Derating begins above 25°C at 2.0 mW/°C, meaning SZBZX84C3V6ET1G dissipates only 200 mW at 50°C ambient.

Does SZBZX84C3V6ET1G have a no-connect pin, and how should it be handled?

Yes, SZBZX84C3V6ET1G has Pin 2 designated as "No Connection" per the official marking diagram and mechanical outline. This terminal is internally unconnected and must remain electrically floating-no PCB trace, copper pour, or solder mask opening should contact it. Improper connection risks shorting internal structures or altering thermal behavior. The functional pins are Pin 1 (Anode) and Pin 3 (Cathode), with polarity indicated by the band on Pin 3.

What is the maximum reverse leakage current for SZBZX84C3V6ET1G?

The maximum reverse leakage current (I_R) for SZBZX84C3V6ET1G is 5.0 µA at V_R = 2.7 V and T_A = 25°C, as specified in the Electrical Characteristics table. This parameter reflects off-state current before breakdown onset and is critical for low-power applications such as battery-backed monitoring circuits. Leakage remains below 10 µA up to 85°C ambient, ensuring minimal impact on standby current budgets in portable designs using SZBZX84C3V6ET1G.

SZBZX84C3V6ET1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 3.6 V

Tolerance:: ±5%

Power - Max:: 225 mW

Impedance (Max) (Zzt):: 90 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)

SZBZX84C3V6ET1G FAQ

1.How can I place an order for SZBZX84C3V6ET1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SZBZX84C3V6ET1G 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 SZBZX84C3V6ET1G reliable?

The price and inventory of SZBZX84C3V6ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C3V6ET1G is usually 5 days.

3.What payment methods are accepted for SZBZX84C3V6ET1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C3V6ET1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZBZX84C3V6ET1G?

SZBZX84C3V6ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZBZX84C3V6ET1G 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 SZBZX84C3V6ET1G?

For technical support, including SZBZX84C3V6ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C3V6ET1G requirements.

6.How does Aetrix verify that SZBZX84C3V6ET1G is sourced from the original manufacturer or authorized distributors?

All SZBZX84C3V6ET1G 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 SZBZX84C3V6ET1G meets industry standards.

7.What is the process for return or replacement of SZBZX84C3V6ET1G?

All SZBZX84C3V6ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C3V6ET1G, 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 SZBZX84C3V6ET1G part is unused and in its original packaging.

Return procedure for SZBZX84C3V6ET1G:

1.Submit a request within 90 days.

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

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