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

onsemi MMSZ8V2T1

Name: MMSZ8V2T1
Brand: onsemi
SKU: MMSZ8V2T1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMSZ8V2T1

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: MMSZ8V2T1.pdf

Description:: DIODE ZENER 8.2V 500MW SOD-123

Quantity:: RFQ Add To RFQ list

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Inventory:8,495

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Product details

Overview

MMSZ8V2T1G from onsemi is a 500 mW surface-mount Zener diode in SOD−123 package, rated for 8.2 V nominal reverse breakdown voltage (±5%), 15 Ω dynamic impedance at 5 mA, and 0.7 µA max reverse leakage at 6.6 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power management circuits.

For engineers reviewing the MMSZ8V2T1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, AEC−Q101 qualification status, ESD robustness (Class 3, >16 kV HBM), and direct alternative part comparisons - all grounded in onsemi's official Rev. 13 datasheet.

Technical Context

This Zener regulator operates in reverse-biased avalanche mode with specified test conditions: V_Z measured at I_ZT = 5 mA (for V_Z1) and 1 mA (for V_Z2), pulse width = 1 ms. Its temperature coefficient is +4.5 mV/°C near 8.2 V, indicating positive drift with rising junction temperature.

Thermal design requires attention to derating: full 500 mW dissipation only at T_L ≤ 75°C; above that, linear derating applies at 6.7 mW/°C. Junction-to-ambient thermal resistance is 340°C/W on FR−5 board, confirming suitability for low-power, thermally constrained layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
Nominal Zener Voltage	8.2 V ±5% - defines stable regulation point under 5 mA test current
Dynamic Impedance	15 Ω @ I_ZT = 5 mA - determines output voltage stability under load variation
Reverse Leakage Current	0.7 µA max @ V_R = 6.6 V - ensures minimal quiescent current in standby clamping
Power Dissipation	500 mW @ T_L = 75°C - sets maximum continuous DC power handling on standard PCB
Thermal Resistance R_JA	340°C/W - indicates need for thermal relief or copper pour in high-ambient designs
ESD Rating	Class 3 (>16 kV HBM) - supports robust handling in automated assembly and end-use environments
AEC−Q101 Qualified	Yes - validates reliability for automotive electronics applications per stress-test requirements

Pinout & Package

SOD−123 surface-mount package: 2-pin, 1.60 × 2.69 × 1.16 mm body, cathode indicated by band. Optimized for high-density placement and reflow soldering (260°C/10 s max).

Pin/Terminal	Circuit Role	Design Meaning
1 (Banded End)	Cathode	Connected to regulated voltage node; reverse-bias anode-to-cathode establishes Zener conduction
2 (Unbanded End)	Anode	Typically tied to ground or lower-potential rail; completes bias path for regulation/clamping

Key Features

Feature	Design Value
500 mW Power Rating on FR−5 Board	Enables use in space-constrained power rails without external heat sinking
±5% Zener Voltage Tolerance	Supports tight-sense feedback loops in LDOs and ADC references without trimming
Class 3 ESD Robustness (>16 kV HBM)	Reduces risk of field failure in handheld or exposed I/O interface protection
AEC−Q101 Qualification	Validates long-term reliability for under-hood and infotainment system voltage references
Pb−Free SOD−123 Package	Meets RoHS compliance and lead-free reflow process requirements

Applications

Low-Voltage Reference	Overvoltage Clamp
Use Scenario: Providing stable 8.2 V reference for ADC input scaling or op-amp biasing in battery-powered sensors. IC Role / Device Role / Timing Role: Precision voltage reference source establishing known analog baseline. Use Value: ±5% tolerance and 15 Ω dynamic impedance ensure <±10 mV shift across 0–5 mA load range.	Use Scenario: Protecting microcontroller GPIO pins from transient surges exceeding 8.2 V in industrial control modules. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage excursion during ESD or inductive kick events. Use Value: 0.7 µA leakage at 6.6 V minimizes standby current while clamping within nanoseconds.
Power Supply Monitor	Linear Regulator Feedback
Use Scenario: Detecting brown-out conditions in 9 V wall adapters by comparing rectified output against 8.2 V threshold. IC Role / Device Role / Timing Role: Threshold detector enabling reset assertion when supply drops below regulation point. Use Value: Positive TC (+4.5 mV/°C) allows predictable trip-point drift compensation across −55°C to +150°C.	Use Scenario: Setting output voltage of adjustable LDOs (e.g., LM317) via resistor divider anchored to MMSZ8V2T1G. IC Role / Device Role / Timing Role: Stable reference node defining regulated output accuracy and load regulation. Use Value: Low dynamic impedance maintains <0.1% output error under 10 mA load transients.

Low-Voltage Reference

Overvoltage Clamp

Use Scenario: Providing stable 8.2 V reference for ADC input scaling or op-amp biasing in battery-powered sensors.

IC Role / Device Role / Timing Role: Precision voltage reference source establishing known analog baseline.

Use Value: ±5% tolerance and 15 Ω dynamic impedance ensure <±10 mV shift across 0–5 mA load range.

Use Scenario: Protecting microcontroller GPIO pins from transient surges exceeding 8.2 V in industrial control modules.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage excursion during ESD or inductive kick events.

Use Value: 0.7 µA leakage at 6.6 V minimizes standby current while clamping within nanoseconds.

Power Supply Monitor

Linear Regulator Feedback

Use Scenario: Detecting brown-out conditions in 9 V wall adapters by comparing rectified output against 8.2 V threshold.

IC Role / Device Role / Timing Role: Threshold detector enabling reset assertion when supply drops below regulation point.

Use Value: Positive TC (+4.5 mV/°C) allows predictable trip-point drift compensation across −55°C to +150°C.

Use Scenario: Setting output voltage of adjustable LDOs (e.g., LM317) via resistor divider anchored to MMSZ8V2T1G.

IC Role / Device Role / Timing Role: Stable reference node defining regulated output accuracy and load regulation.

Use Value: Low dynamic impedance maintains <0.1% output error under 10 mA load transients.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C8V2	Same 8.2 V nominal, ±5% tolerance, but SOT−23 package (higher R_JA = 375°C/W); 20 Ω Z_ZT @ 5 mA	Less thermal margin in high-density layouts; slightly higher regulation error under load	Prefer MMSZ8V2T1G where board space permits SOD−123 and tighter impedance is required
MMBZ5231BS	8.2 V nominal, ±5%, SOT−23 package, 100 mW rating, 30 Ω Z_ZT @ 20 mA	Lower power rating limits use to signal-level clamping only; not suitable for 500 mW reference loads	Select MMSZ8V2T1G for higher-power regulation; choose MMBZ5231BS only for ultra-low-power sensing nodes

Compared with BZX84-C8V2 and MMBZ5231BS, MMSZ8V2T1G offers superior thermal performance (340°C/W vs. ≥375°C/W), lower dynamic impedance (15 Ω vs. ≥20 Ω), and full 500 mW capability - making it the preferred choice for robust, medium-power voltage reference and clamping in automotive and industrial PCBs.

Availability

MMSZ8V2T1G is available at Aetrix Electronics and suitable for automotive voltage monitoring, industrial sensor reference circuits, and consumer power supply protection requiring stable component supply and AEC−Q101 assurance.

Supply support for MMSZ8V2T1G 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, medical, and IoT applications.

The MMSZxxxT1G series targets cost-sensitive, high-reliability Zener regulation needs in compact surface-mount designs - especially where AEC−Q101 qualification, high ESD immunity, and precise low-voltage referencing are critical.

FAQ

What is the exact Zener voltage tolerance for MMSZ8V2T1G?

MMSZ8V2T1G has a nominal Zener voltage of 8.2 V with a standard tolerance of ±5%, meaning the actual measured V_Z falls between 7.79 V and 8.61 V at I_ZT = 5 mA and T_A = 25°C. This tolerance is confirmed in the Electrical Characteristics table on page 2 of the onsemi datasheet Rev. 13.

Does MMSZ8V2T1G support automotive-grade reliability?

Yes, MMSZ8V2T1G is AEC−Q101 qualified and PPAP capable, meeting stress-test requirements for automotive electronics including temperature cycling, humidity testing, and mechanical shock. Its SOD−123 package and Pb−free construction further align with automotive manufacturing standards.

What is the maximum reverse leakage current specification for MMSZ8V2T1G?

The maximum reverse leakage current for MMSZ8V2T1G is 0.7 µA at V_R = 6.6 V and T_A = 25°C. This value is explicitly listed in the "Max Reverse Leakage Current" column of the Electrical Characteristics table for the MMSZ8V2T1G row in the onsemi datasheet.

Can MMSZ8V2T1G be used in place of MMSZ8V2T1?

MMSZ8V2T1G replaces MMSZ8V2T1 as the Pb−free version; both share identical electrical specs, SOD−123 package, and marking (V4). The "G" suffix denotes RoHS compliance and lead-free terminations. No design changes are needed when migrating from MMSZ8V2T1 to MMSZ8V2T1G.

What is the thermal derating behavior of MMSZ8V2T1G above 75°C?

MMSZ8V2T1G derates linearly above 75°C at 6.7 mW/°C, dropping from 500 mW at T_L = 75°C to zero at approximately 148°C. This derating curve is defined in the Maximum Ratings table and validated per JEDEC JESD51−1 for FR−5 board mounting.

MMSZ8V2T1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 8.2 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 15 Ohms

Current - Reverse Leakage @ Vr:: 700 nA @ 5 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

MMSZ8V2T1 FAQ

1.How can I place an order for MMSZ8V2T1 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMSZ8V2T1 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 MMSZ8V2T1 reliable?

The price and inventory of MMSZ8V2T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ8V2T1 is usually 5 days.

3.What payment methods are accepted for MMSZ8V2T1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ8V2T1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMSZ8V2T1?

MMSZ8V2T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMSZ8V2T1 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 MMSZ8V2T1?

For technical support, including MMSZ8V2T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ8V2T1 requirements.

6.How does Aetrix verify that MMSZ8V2T1 is sourced from the original manufacturer or authorized distributors?

All MMSZ8V2T1 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 MMSZ8V2T1 meets industry standards.

7.What is the process for return or replacement of MMSZ8V2T1?

All MMSZ8V2T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ8V2T1, 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 MMSZ8V2T1 part is unused and in its original packaging.

Return procedure for MMSZ8V2T1:

1.Submit a request within 90 days.

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

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