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

onsemi SZMMSZ6V2T1G

Name: SZMMSZ6V2T1G
Brand: onsemi
SKU: SZMMSZ6V2T1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZMMSZ6V2T1G

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: SZMMSZ6V2T1G.pdf

Description:: DIODE ZENER 6.2V 500MW SOD123

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Inventory:6,791

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Product details

Overview

SZMMSZ6V2T1G from onsemi is a 6.2 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at 75°C, with 10 Ω dynamic impedance at 5 mA and 3 μA reverse leakage at 5.6 V, used for precision voltage reference and overvoltage protection in automotive power rails.

For engineers reviewing the SZMMSZ6V2T1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal derating behavior, ESD robustness (Class 3 >16 kV HBM), AEC−Q101 qualification, and SOD−123 board assembly compatibility.

Technical Context

This device operates as a two-terminal voltage regulator in reverse breakdown mode, with nominal Zener voltage of 6.2 V measured at 5 mA test current (IZT1) and guaranteed between 5.89 V and 6.51 V. Its low 10 Ω dynamic impedance ensures stable regulation under varying load conditions.

Designed for automotive-grade reliability, it meets AEC−Q101 stress testing requirements and features Pb−Free packaging compliant with RoHS. The SOD−123 case supports automated placement and withstands 260°C for 10 seconds during reflow soldering.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	6.2 V nominal, 5.89–6.51 V range at I_ZT = 5 mA - defines regulated output voltage with ±5% tolerance
Power Dissipation (P_D)	500 mW on FR−5 board at T_L = 75°C - sets maximum continuous power handling before thermal derating
Zener Impedance (Z_ZT)	10 Ω max at I_ZT = 5 mA, 1 kHz - determines voltage regulation stability under dynamic load changes
Reverse Leakage (I_R)	3 μA max at V_R = 5.6 V - indicates low standby current in clamping or reference applications
Junction Temp Range	−55°C to +150°C - enables operation in under-hood automotive environments and industrial control systems
ESD Rating	Class 3 (>16 kV) per HBM - provides robustness against handling and system-level electrostatic discharge events

Pinout & Package

SOD−123 surface-mount plastic package (Case 425, Style 1), dimensions 1.60 × 2.69 × 1.16 mm, cathode indicated by polarity band. Designed for high-density PCB layouts and automated assembly.

Pin/Terminal	Circuit Role	Design Meaning
1 (Banded End)	Cathode	Connected to regulated output or voltage reference node; reverse-biased terminal during Zener operation
2 (Non-banded End)	Anode	Connected to ground or lower-potential rail; completes current path during breakdown conduction

Key Features

Feature	Design Value
AEC−Q101 Qualified	Validated for automotive electronics use with extended temperature cycling, humidity, and mechanical stress testing
Pb−Free Packaging	RoHS-compliant construction with corrosion-resistant finish and IR-reflow compatible solderability
High ESD Robustness	Class 3 Human Body Model rating (>16 kV) eliminates need for external ESD protection in many interface circuits
Thermal Derating Curve	6.7 mW/°C reduction above 75°C ambient - enables accurate power budgeting in thermally constrained designs

Applications

Automotive Power Rail Clamping	Industrial Sensor Reference
Use Scenario: Protecting CAN transceiver supply lines from load dump transients in 12 V vehicle electrical systems. IC Role / Device Role / Timing Role: Voltage clamp limiting peak rail voltage to ≤6.6 V during surge events. Use Value: Prevents damage to downstream logic ICs using 5 V or 3.3 V supplies while maintaining AEC−Q101 compliance.	Use Scenario: Providing stable 6.2 V reference for analog-to-digital conversion in factory-floor pressure sensors. IC Role / Device Role / Timing Role: Precision shunt reference establishing known bias point for signal conditioning circuitry. Use Value: Enables <±0.5% measurement accuracy across −40°C to +125°C due to tight V_Z tolerance and low TC near 6.2 V.
USB Port Overvoltage Protection	Embedded MCU Reset Circuit
Use Scenario: Safeguarding USB 2.0 data line receivers against accidental 12 V connection in portable diagnostic tools. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor operating in reverse breakdown during overvoltage events. Use Value: Limits voltage excursion to 6.6 V max while drawing <100 mA peak current - avoids latch-up in connected PHY ICs.	Use Scenario: Generating clean reset pulse for ARM Cortex-M microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Zener-based threshold detector feeding RC network to reset supervisor IC input. Use Value: Delivers predictable 6.2 V trip point with <10 μs response time, ensuring deterministic MCU restart after power recovery.

Automotive Power Rail Clamping

Industrial Sensor Reference

Use Scenario: Protecting CAN transceiver supply lines from load dump transients in 12 V vehicle electrical systems.

IC Role / Device Role / Timing Role: Voltage clamp limiting peak rail voltage to ≤6.6 V during surge events.

Use Value: Prevents damage to downstream logic ICs using 5 V or 3.3 V supplies while maintaining AEC−Q101 compliance.

Use Scenario: Providing stable 6.2 V reference for analog-to-digital conversion in factory-floor pressure sensors.

IC Role / Device Role / Timing Role: Precision shunt reference establishing known bias point for signal conditioning circuitry.

Use Value: Enables <±0.5% measurement accuracy across −40°C to +125°C due to tight V_Z tolerance and low TC near 6.2 V.

USB Port Overvoltage Protection

Embedded MCU Reset Circuit

Use Scenario: Safeguarding USB 2.0 data line receivers against accidental 12 V connection in portable diagnostic tools.

IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor operating in reverse breakdown during overvoltage events.

Use Value: Limits voltage excursion to 6.6 V max while drawing <100 mA peak current - avoids latch-up in connected PHY ICs.

Use Scenario: Generating clean reset pulse for ARM Cortex-M microcontrollers during brown-out conditions.

IC Role / Device Role / Timing Role: Zener-based threshold detector feeding RC network to reset supervisor IC input.

Use Value: Delivers predictable 6.2 V trip point with <10 μs response time, ensuring deterministic MCU restart after power recovery.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MMSZ6V2T1G	No SZ prefix; not AEC−Q101 qualified; identical electrical specs and SOD−123 package	Intended for commercial/industrial use only; unsuitable for automotive production	Select when AEC−Q101 certification is not required and cost optimization is prioritized
BZX84-C6V2	Higher Z_ZT (40 Ω max at 5 mA); SOT−23 package; no AEC−Q101 or Class 3 ESD rating	Lower power density; less suitable for space-constrained automotive modules	Choose for legacy designs where SOT−23 footprint is fixed and ESD robustness is secondary

Compared with MMSZ6V2T1G and BZX84-C6V2, SZMMSZ6V2T1G uniquely combines automotive qualification, ultra-low dynamic impedance, and industry-leading ESD immunity - making it the preferred choice for safety-critical voltage clamping where reliability and regulatory compliance are mandatory.

Availability

SZMMSZ6V2T1G is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, USB port protection, and embedded reset circuitry requiring stable component supply across extended temperature ranges.

Supply support for SZMMSZ6V2T1G 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, medical, and IoT applications.

The MMSZ/SZMMSZ series was designed specifically for high-reliability voltage regulation and transient suppression in automotive ECUs and industrial control units, emphasizing AEC−Q101 compliance, thermal resilience, and automated assembly readiness.

FAQ

What is the Zener voltage tolerance of SZMMSZ6V2T1G?

The SZMMSZ6V2T1G has a nominal Zener voltage of 6.2 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 5.89 V and 6.51 V when tested at I_ZT = 5 mA and T_A = 25°C. This tolerance is confirmed in the Electrical Characteristics table on page 2 of the official onsemi datasheet for SZMMSZ6V2T1G.

Is SZMMSZ6V2T1G qualified for automotive applications?

Yes, SZMMSZ6V2T1G is AEC−Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and control change requirements, distinguishing it from the commercial-grade MMSZ6V2T1G variant.

What is the maximum reverse leakage current for SZMMSZ6V2T1G?

The maximum reverse leakage current for SZMMSZ6V2T1G is 3 μA at V_R = 5.6 V, as specified in the Electrical Characteristics table. This value is measured under standard test conditions (T_A = 25°C) and reflects the device's ability to maintain low standby current in voltage reference configurations.

Does SZMMSZ6V2T1G have Pb−Free packaging?

Yes, SZMMSZ6V2T1G uses Pb−Free packaging, indicated by the "G" suffix in the part number and confirmed in the Ordering Information section. It complies with RoHS Directive 2011/65/EU and supports lead-free reflow soldering up to 260°C for 10 seconds.

What is the thermal resistance junction-to-ambient for SZMMSZ6V2T1G?

The thermal resistance junction-to-ambient (R_JA) for SZMMSZ6V2T1G is 340°C/W, as listed in the Maximum Ratings table. This value applies to mounting on FR−5 board and is critical for calculating junction temperature rise under continuous power dissipation conditions.

SZMMSZ6V2T1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 6.2 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 10 Ohms

Current - Reverse Leakage @ Vr:: 3 µA @ 4 V

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

Operating Temperature:: -55°C ~ 150°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123

SZMMSZ6V2T1G FAQ

1.How can I place an order for SZMMSZ6V2T1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SZMMSZ6V2T1G 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 SZMMSZ6V2T1G reliable?

The price and inventory of SZMMSZ6V2T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ6V2T1G is usually 5 days.

3.What payment methods are accepted for SZMMSZ6V2T1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ6V2T1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZMMSZ6V2T1G?

SZMMSZ6V2T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZMMSZ6V2T1G 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 SZMMSZ6V2T1G?

For technical support, including SZMMSZ6V2T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ6V2T1G requirements.

6.How does Aetrix verify that SZMMSZ6V2T1G is sourced from the original manufacturer or authorized distributors?

All SZMMSZ6V2T1G 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 SZMMSZ6V2T1G meets industry standards.

7.What is the process for return or replacement of SZMMSZ6V2T1G?

All SZMMSZ6V2T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ6V2T1G, 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 SZMMSZ6V2T1G part is unused and in its original packaging.

Return procedure for SZMMSZ6V2T1G:

1.Submit a request within 90 days.

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

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