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

onsemi MMSZ6V2ET1

Name: MMSZ6V2ET1
Brand: onsemi
SKU: MMSZ6V2ET1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMSZ6V2ET1

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: MMSZ6V2ET1.pdf

Description:: DIODE ZENER 6.2V 500MW SOD123

Quantity:: RFQ Add To RFQ list

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Inventory:9,827

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Product details

Overview

MMSZ6V2ET1G from onsemi is a 6.2 V ±5% Zener diode in SOD-123 package, rated for 500 mW power dissipation at 75 °C on FR-5 board, with 10 Ω dynamic impedance at 5 mA test current and 3 µA reverse leakage at 5.6 V, used for precision voltage regulation and overvoltage protection in low-power analog circuits.

For engineers reviewing the MMSZ6V2ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal derating behavior, ESD robustness (Class 3 HBM >16 kV), and SOD-123 footprint compatibility with automated assembly processes.

Technical Context

This device operates as a two-terminal shunt regulator, maintaining stable reference voltage across its cathode-anode terminals when reverse-biased above its breakdown threshold. Its 6.2 V nominal Zener voltage is specified at I_ZT = 5 mA with ±5% tolerance and exhibits a positive temperature coefficient near zero crossing (~0.5 mV/°C per typical curve).

The SOD-123 package enables high-density PCB layout with 1.60 × 2.69 × 1.16 mm dimensions and supports reflow soldering up to 260 °C for 10 seconds. Thermal resistance from junction-to-lead is 150 °C/W, enabling effective heat transfer to copper traces under pulsed load conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.89–6.51 V at I_ZT = 5 mA; ensures stable 6.2 V reference within ±5% across production lots and operating temperatures.
Zener Impedance (Z_ZT)	10 Ω max at I_ZT = 5 mA; minimizes output voltage variation under changing load currents in feedback or clamp circuits.
Reverse Leakage (I_R)	3 µA max at V_R = 5.6 V; guarantees low quiescent current draw in battery-powered voltage monitor or bias networks.
Power Dissipation (P_D)	500 mW at T_L = 75 °C on FR-5 board; defines continuous DC power handling before thermal derating begins.
Peak Surge Power (P_Pk)	225 W for 8 × 20 µs pulse; supports transient overvoltage suppression without failure in ESD or inductive switching events.
ESD Rating	Class 3 (>16 kV) per Human Body Model; eliminates need for external ESD protection in front-end sensor or interface circuits.
Junction Temp Range	−55 °C to +150 °C; validated for automotive under-hood and industrial control environments requiring extended thermal operation.

Pinout & Package

SOD-123 surface-mount package with 2-pin configuration: molded thermosetting plastic case, cathode indicated by polarity band, UL 94 V-0 flammability rating, and Pb-free construction.

Pin/Terminal	Circuit Role	Design Meaning
1 (Banded End)	Cathode	Connected to regulated voltage node; reverse-bias terminal where Zener breakdown occurs and current sinks into ground or lower potential.
2 (Non-banded End)	Anode	Connected to circuit ground or common return path; completes current loop during regulation or clamping operation.

Key Features

Feature	Design Value
AEC-Q101 Qualified	Validated for automotive electronics use including engine control modules and body electronics requiring reliability under thermal cycling and vibration.
Optimized for Automated Assembly	Standardized SOD-123 footprint and marking enable high-yield pick-and-place placement and AOI inspection without custom tooling.
Low Dynamic Impedance	10 Ω maximum ensures <10 mV output shift per 100 µA load change - critical for precision reference buffering and ADC biasing.
High ESD Robustness	Class 3 HBM (>16 kV) allows direct integration into exposed I/O lines without additional TVS devices in consumer and industrial interfaces.
Thermal Derating Curve	6.7 mW/°C reduction above 75 °C ambient enables accurate lifetime power budgeting in enclosed enclosures or stacked PCB assemblies.

Applications

Automotive Sensor Biasing	Industrial Analog Signal Conditioning
Use Scenario: Providing stable 6.2 V reference for Hall-effect position sensors in transmission control units. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise excitation voltage for ratiometric sensor outputs. Use Value: Maintains sensor accuracy within ±0.5% over −40 °C to +125 °C due to tight Zener tolerance and low TC near 6.2 V.	Use Scenario: Clamping amplifier input stages against transients in 4–20 mA loop receivers. IC Role / Device Role / Timing Role: Overvoltage protection element limiting input swing to safe levels for op-amp rail-to-rail inputs. Use Value: Absorbs 225 W surge energy without degradation, preventing latch-up or damage during field wiring faults.
Portable Medical Instrumentation	Smart Meter Reference Subsystem
Use Scenario: Generating low-noise bias for photodiode transimpedance amplifiers in pulse oximeters. IC Role / Device Role / Timing Role: Low-leakage (3 µA max) voltage clamp stabilizing virtual ground nodes in ultra-low-current signal paths. Use Value: Enables sub-nA input bias error budgets by minimizing parasitic current injection into sensitive analog front-ends.	Use Scenario: Supplying regulated 6.2 V to metrology ADCs and real-time clocks in electricity meters. IC Role / Device Role / Timing Role: Primary voltage reference source feeding precision voltage dividers and bandgap calibration circuits. Use Value: Delivers ±5% initial accuracy and <±100 ppm/°C drift over temperature, meeting IEC 62053-21 Class 0.2 accuracy requirements.

Automotive Sensor Biasing

Industrial Analog Signal Conditioning

Use Scenario: Providing stable 6.2 V reference for Hall-effect position sensors in transmission control units.

IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise excitation voltage for ratiometric sensor outputs.

Use Value: Maintains sensor accuracy within ±0.5% over −40 °C to +125 °C due to tight Zener tolerance and low TC near 6.2 V.

Use Scenario: Clamping amplifier input stages against transients in 4–20 mA loop receivers.

IC Role / Device Role / Timing Role: Overvoltage protection element limiting input swing to safe levels for op-amp rail-to-rail inputs.

Use Value: Absorbs 225 W surge energy without degradation, preventing latch-up or damage during field wiring faults.

Portable Medical Instrumentation

Smart Meter Reference Subsystem

Use Scenario: Generating low-noise bias for photodiode transimpedance amplifiers in pulse oximeters.

IC Role / Device Role / Timing Role: Low-leakage (3 µA max) voltage clamp stabilizing virtual ground nodes in ultra-low-current signal paths.

Use Value: Enables sub-nA input bias error budgets by minimizing parasitic current injection into sensitive analog front-ends.

Use Scenario: Supplying regulated 6.2 V to metrology ADCs and real-time clocks in electricity meters.

IC Role / Device Role / Timing Role: Primary voltage reference source feeding precision voltage dividers and bandgap calibration circuits.

Use Value: Delivers ±5% initial accuracy and <±100 ppm/°C drift over temperature, meeting IEC 62053-21 Class 0.2 accuracy requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C6V2	Same 6.2 V nominal, ±5% tolerance, but SOT-23 package (larger footprint, higher R_JA = 350 °C/W); Z_ZT = 15 Ω max at 5 mA.	Less suitable for ultra-dense layouts; requires larger pad geometry and exhibits greater thermal sensitivity in confined spaces.	Select when legacy SOT-23 footprint compatibility is required and board space permits larger thermal relief.
MMBZ5234BS	6.2 V ±5%, SOT-323 package, 200 mW rating, Z_ZT = 12 Ω max; not AEC-Q101 qualified.	Lower power rating limits use in sustained clamp applications; lacks automotive qualification for safety-critical systems.	Choose for cost-sensitive consumer applications where AEC-Q101 compliance and 500 mW capability are not mandatory.

Compared with BZX84-C6V2 and MMBZ5234BS, the MMSZ6V2ET1G offers superior thermal performance in compact layouts, automotive-grade reliability, and tighter dynamic impedance - making it optimal for space-constrained, high-reliability analog subsystems.

Availability

MMSZ6V2ET1G is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog signal conditioning, and portable medical instrumentation requiring stable component supply and long-term lifecycle support.

Supply support for MMSZ6V2ET1G 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MMSZ6V2ET1G belongs to the MMSZxxxET1G Zener regulator series designed specifically for high-reliability, surface-mount voltage reference and protection in space-constrained, thermally demanding environments.

FAQ

What is the Zener voltage tolerance of the MMSZ6V2ET1G?

The MMSZ6V2ET1G has a nominal Zener voltage of 6.2 V with a standard tolerance of ±5%, meaning the actual measured V_Z falls between 5.89 V and 6.51 V when tested at I_ZT = 5 mA and T_A = 25 °C. This tolerance is guaranteed across the full operating temperature range and applies to all units in production lots.

Is the MMSZ6V2ET1G suitable for automotive applications?

Yes, the MMSZ6V2ET1G is AEC-Q101 qualified and PPAP capable, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its −55 °C to +150 °C junction temperature range and robust ESD rating support under-hood and cabin deployment.

What is the maximum reverse leakage current for the MMSZ6V2ET1G?

The MMSZ6V2ET1G specifies a maximum reverse leakage current of 3 µA at V_R = 5.6 V and T_A = 25 °C. At higher temperatures or lower test voltages, leakage increases predictably - e.g., up to 4 µA at 125 °C - but remains well below 10 µA across its full operating range.

Can the MMSZ6V2ET1G be used in place of older MMSZ6V2ET1 parts?

Yes, the MMSZ6V2ET1G is the Pb-free, enhanced-reliability successor to the legacy MMSZ6V2ET1. It maintains identical electrical specifications, SOD-123 mechanical form factor, and pinout, with added AEC-Q101 qualification and Class 3 HBM ESD rating - no design or layout changes are needed for migration.

What is the thermal resistance of the MMSZ6V2ET1G package?

The MMSZ6V2ET1G has a junction-to-lead thermal resistance (R_JL) of 150 °C/W and a junction-to-ambient resistance (R_JA) of 340 °C/W when mounted on an FR-5 board. These values define its steady-state thermal performance and must be applied with derating curves to ensure safe operation above 75 °C board temperature.

MMSZ6V2ET1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123

MMSZ6V2ET1 FAQ

1.How can I place an order for MMSZ6V2ET1 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMSZ6V2ET1 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 MMSZ6V2ET1 reliable?

The price and inventory of MMSZ6V2ET1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ6V2ET1 is usually 5 days.

3.What payment methods are accepted for MMSZ6V2ET1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ6V2ET1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMSZ6V2ET1?

MMSZ6V2ET1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMSZ6V2ET1 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 MMSZ6V2ET1?

For technical support, including MMSZ6V2ET1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ6V2ET1 requirements.

6.How does Aetrix verify that MMSZ6V2ET1 is sourced from the original manufacturer or authorized distributors?

All MMSZ6V2ET1 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 MMSZ6V2ET1 meets industry standards.

7.What is the process for return or replacement of MMSZ6V2ET1?

All MMSZ6V2ET1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ6V2ET1, 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 MMSZ6V2ET1 part is unused and in its original packaging.

Return procedure for MMSZ6V2ET1:

1.Submit a request within 90 days.

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

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