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

onsemi SZBZX84C5V6ET3G

Name: SZBZX84C5V6ET3G
Brand: onsemi
SKU: SZBZX84C5V6ET3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZBZX84C5V6ET3G

Manufacturer:: onsemi

Category:: Single Zener Diodes

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

Datasheet:: SZBZX84C5V6ET3G.pdf

Description:: DIODE ZENER 5.6V 225MW SOT23-3

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Product details

Overview

SZBZX84C5V6ET3G from onsemi is a 5.6 V, 250 mW Zener diode in SOT-23 package, designed for precision voltage regulation and reference in space-constrained circuits. It delivers ±5% nominal Zener voltage tolerance at 5 mA test current, 40 Ω dynamic impedance, and −2 mV/°C temperature coefficient - enabling stable biasing in power supply feedback loops, overvoltage protection, and analog reference circuits for portable electronics.

For engineers reviewing the SZBZX84C5V6ET3G datasheet, pinout, applications, or equivalent options, key selection criteria include its 5.6 V nominal breakdown voltage, 250 mW power rating on FR-5 board, 1.0 µA max reverse leakage at 3.0 V, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This device operates as a two-terminal voltage reference diode with cathode-anode polarity, requiring reverse-bias operation to achieve regulated Zener conduction. Its thermal resistance of 500 °C/W (Junction-to-Ambient, FR-5 board) and 417 °C/W (alumina substrate) defines derating behavior above 25 °C ambient.

The SZ prefix confirms automotive qualification per AEC-Q101, with Class 3 ESD robustness (>16 kV HBM), Pb-free RoHS compliance, and peak pulse power handling up to 225 W (8 × 20 µs waveform). Pin 2 is internally unconnected - a critical layout constraint for PCB design and automated assembly.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.2–6.0 V @ I_ZT = 5 mA - ensures stable 5.6 V reference under typical bias conditions
Power Dissipation	250 mW on FR-5 board - sets maximum continuous DC power limit before thermal derating
Zener Impedance (Z_ZT)	40 Ω @ 5 mA - determines output voltage stability under varying load current
Reverse Leakage (I_R)	1.0 µA @ V_R = 3.0 V - defines minimum off-state current in clamping or sensing applications
Temp. Coefficient (TC)	−2 mV/°C @ 5 mA - quantifies voltage drift across industrial temperature range (−65 to +150 °C)
Capacitance (C)	200 pF @ V_R = 0 V, f = 1 MHz - impacts high-frequency noise filtering and transient response
ESD Rating	Class 3 (>16 kV HBM) - supports robust handling in manual and automated assembly environments

Pinout & Package

SOT-23 (TO-236) surface-mount package: 2.90 mm × 1.30 mm × 1.00 mm body, 1.90 mm lead pitch, void-free thermosetting plastic case with corrosion-resistant finish. Cathode identified by band marking.

Pin/Terminal	Circuit Role	Design Meaning
1	Anode	Connected to lower-potential node in reverse-bias configuration; must be held ≤ V_Z below cathode for regulation
2	No Connection	Internally unconnected - must remain floating; no trace or pad should tie to this terminal
3	Cathode	Connected to higher-potential node; carries full Zener current during regulation; marked by polarity band

Key Features

Feature	Design Value
AEC-Q101 Qualified	Validated for automotive applications including engine control units and ADAS sensor interfaces
250 mW Power Rating	Enables compact voltage reference without external heat sinking on standard FR-5 PCBs
Class 3 ESD Robustness	Eliminates need for additional ESD protection circuitry in handheld and portable designs
Pb-Free & RoHS Compliant	Meets global environmental compliance requirements for consumer, industrial, and automotive end equipment
Optimized for Automated Assembly	Transfer-molded case geometry and lead finish ensure reliable pick-and-place and reflow soldering yield

Applications

Power Supply Feedback	Overvoltage Clamp
Use Scenario: Regulating output voltage in low-power DC-DC converter feedback networks using TL431 or op-amp comparators. IC Role / Device Role / Timing Role: Precision voltage reference providing stable 5.6 V threshold for error amplifier input. Use Value: Maintains ±1% output regulation accuracy over temperature due to low TC and tight V_Z tolerance.	Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events on 5 V bus lines. IC Role / Device Role / Timing Role: Shunt clamping element diverting excess current when bus exceeds 5.6 V. Use Value: Limits voltage excursion to <6.0 V within 100 ns, leveraging 225 W peak pulse capability.
Reference Voltage Source	Battery Monitoring Circuit
Use Scenario: Generating stable bias for ADC reference inputs or analog sensor signal conditioning stages. IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference replacing larger 3-pin IC references. Use Value: Delivers 200 pF capacitance and 40 Ω impedance - minimizing reference noise coupling into sensitive analog paths.	Use Scenario: Detecting battery undervoltage condition in Li-ion powered wearables and medical sensors. IC Role / Device Role / Timing Role: Threshold detector comparing battery voltage against 5.6 V reference via comparator input. Use Value: Enables accurate 3.0–4.2 V battery state-of-charge estimation with 1.0 µA leakage ensuring >10-year shelf life.

Power Supply Feedback

Overvoltage Clamp

Use Scenario: Regulating output voltage in low-power DC-DC converter feedback networks using TL431 or op-amp comparators.

IC Role / Device Role / Timing Role: Precision voltage reference providing stable 5.6 V threshold for error amplifier input.

Use Value: Maintains ±1% output regulation accuracy over temperature due to low TC and tight V_Z tolerance.

Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events on 5 V bus lines.

IC Role / Device Role / Timing Role: Shunt clamping element diverting excess current when bus exceeds 5.6 V.

Use Value: Limits voltage excursion to <6.0 V within 100 ns, leveraging 225 W peak pulse capability.

Reference Voltage Source

Battery Monitoring Circuit

Use Scenario: Generating stable bias for ADC reference inputs or analog sensor signal conditioning stages.

IC Role / Device Role / Timing Role: Low-noise, low-drift voltage reference replacing larger 3-pin IC references.

Use Value: Delivers 200 pF capacitance and 40 Ω impedance - minimizing reference noise coupling into sensitive analog paths.

Use Scenario: Detecting battery undervoltage condition in Li-ion powered wearables and medical sensors.

IC Role / Device Role / Timing Role: Threshold detector comparing battery voltage against 5.6 V reference via comparator input.

Use Value: Enables accurate 3.0–4.2 V battery state-of-charge estimation with 1.0 µA leakage ensuring >10-year shelf life.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84C5V6ET1G	Same electrical specs and SOT-23 package, but non-automotive grade (no AEC-Q101); 3,000 pcs/reel vs. 10,000 pcs/reel	Lacks PPAP support and automotive qualification documentation; suitable only for commercial-grade designs	Select when cost sensitivity outweighs automotive compliance requirements
MMSZ5232BT1G	5.6 V Zener, 500 mW rating, SOD-123 package; higher power but larger footprint and 30 Ω Z_ZT	Requires more PCB area; better suited for higher-current regulation where thermal margin is critical	Choose when >250 mW continuous dissipation or lower dynamic impedance is required

Compared with BZX84C5V6ET1G, SZBZX84C5V6ET3G adds AEC-Q101 qualification and higher reel quantity, while MMSZ5232BT1G trades smaller size for higher power and lower impedance - making SZBZX84C5V6ET3G optimal for space-constrained automotive modules needing guaranteed qualification and volume supply.

Availability

SZBZX84C5V6ET3G is available at Aetrix Electronics and suitable for automotive infotainment systems, portable medical monitors, and high-density IoT sensor nodes requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for SZBZX84C5V6ET3G 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, and intelligent edge applications.

The BZX84Cxxx series is engineered for compact, reliable voltage regulation in portable and automotive electronics - prioritizing low profile, high ESD immunity, and AEC-Q101 compliance for mission-critical subsystems.

FAQ

What is the Zener voltage tolerance of SZBZX84C5V6ET3G at 5 mA test current?

The SZBZX84C5V6ET3G has a nominal Zener voltage of 5.6 V with a tolerance of ±0.4 V (5.2 V to 6.0 V) at I_ZT = 5 mA, as specified in the Electrical Characteristics table on page 2 of the onsemi datasheet. This 7.1% tolerance enables predictable regulation in feedback and reference circuits without requiring post-manufacturing trimming. The SZBZX84C5V6ET3G maintains this specification across its qualified operating temperature range.

Is pin 2 of SZBZX84C5V6ET3G electrically connected internally?

No, pin 2 of the SZBZX84C5V6ET3G is explicitly designated as "No Connection" in the mechanical outline (Style 8) and confirmed in the Electrical Characteristics table footnote. It is an unconnected terminal - not tied to anode, cathode, or substrate - and must remain electrically floating in PCB layout. Routing traces or placing vias to pin 2 violates the device's validated mechanical and electrical design.

Does SZBZX84C5V6ET3G meet automotive reliability standards?

Yes, the SZBZX84C5V6ET3G is AEC-Q101 qualified and PPAP capable, as stated in the Specification Features section of the datasheet. The "SZ" prefix denotes automotive-grade manufacturing controls, site-specific change management, and stress testing beyond commercial-grade equivalents. This makes the SZBZX84C5V6ET3G suitable for under-hood and cabin electronics where extended temperature operation and long-term reliability are mandatory.

What is the maximum reverse leakage current for SZBZX84C5V6ET3G at 3.0 V?

The maximum reverse leakage current for SZBZX84C5V6ET3G is 1.0 µA at V_R = 3.0 V and T_A = 25 °C, per the Electrical Characteristics table. This low leakage ensures minimal quiescent current draw in battery-powered applications and preserves accuracy in high-impedance reference circuits. The SZBZX84C5V6ET3G maintains this performance across its full storage temperature range of −65 °C to +150 °C.

Can SZBZX84C5V6ET3G be used in place of BZX84C5V6ET1G in existing designs?

Yes, the SZBZX84C5V6ET3G is mechanically and electrically identical to BZX84C5V6ET1G in pinout, package, and core Zener parameters - but adds AEC-Q101 qualification, automotive change control, and 10,000-piece tape-and-reel packaging. No PCB or schematic changes are needed; however, designers must verify that automotive qualification and PPAP documentation align with their program requirements before substitution.

SZBZX84C5V6ET3G 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):: 5.6 V

Tolerance:: ±7%

Power - Max:: 225 mW

Impedance (Max) (Zzt):: 40 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 2 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)

SZBZX84C5V6ET3G FAQ

1.How can I place an order for SZBZX84C5V6ET3G through Aetrix?

Please submit a Request for Quotation (RFQ) for SZBZX84C5V6ET3G 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 SZBZX84C5V6ET3G reliable?

The price and inventory of SZBZX84C5V6ET3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZBZX84C5V6ET3G is usually 5 days.

3.What payment methods are accepted for SZBZX84C5V6ET3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZBZX84C5V6ET3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZBZX84C5V6ET3G?

SZBZX84C5V6ET3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZBZX84C5V6ET3G 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 SZBZX84C5V6ET3G?

For technical support, including SZBZX84C5V6ET3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZBZX84C5V6ET3G requirements.

6.How does Aetrix verify that SZBZX84C5V6ET3G is sourced from the original manufacturer or authorized distributors?

All SZBZX84C5V6ET3G 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 SZBZX84C5V6ET3G meets industry standards.

7.What is the process for return or replacement of SZBZX84C5V6ET3G?

All SZBZX84C5V6ET3G units undergo pre-shipment inspection (PSI). If there is an issue with SZBZX84C5V6ET3G, 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 SZBZX84C5V6ET3G part is unused and in its original packaging.

Return procedure for SZBZX84C5V6ET3G:

1.Submit a request within 90 days.

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

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