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

onsemi MM5Z8V2ST1

Name: MM5Z8V2ST1
Brand: onsemi
SKU: MM5Z8V2ST1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MM5Z8V2ST1

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SC-79, SOD-523

Datasheet:: MM5Z8V2ST1.pdf

Description:: DIODE ZENER 8.2V 200MW SOD523

Quantity:: RFQ Add To RFQ list

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Inventory:2,570

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Product details

Overview

MM5Z8V2ST1 from onsemi is a 200 mW, 8.02–8.36 V Zener voltage regulator diode in SOD−523 package, designed for precision voltage reference and overvoltage protection in space-constrained circuits such as smartphone power rails and portable device battery monitoring.

For engineers reviewing the MM5Z8V2ST1 datasheet, pinout, applications, or equivalent options, key selection factors include its ±3% Zener tolerance at 5 mA, 135 pF capacitance at 0 V, 3.2 mV/°C temperature coefficient, and Class 3 ESD rating (>16 kV HBM).

Technical Context

This Zener diode operates in reverse breakdown mode to maintain stable reference voltage under varying load and temperature conditions. It delivers regulated output with tight V_Z tolerance (±3%), low dynamic impedance (15 Ω max at I_ZT), and low leakage (0.7 µA max at 6.5 V).

Its thermal design supports continuous operation up to +150°C junction temperature, with 635°C/W junction-to-ambient thermal resistance and linear derating above 25°C (1.5 mW/°C). The SOD−523 package enables high-density PCB layouts while maintaining robust solderability per MSL 1 and 260°C reflow compatibility.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	8.02–8.36 V at 5 mA test current - defines precise regulation window for reference or clamp applications
Power Rating	200 mW at 25°C - sets maximum continuous dissipation before thermal derating begins
Zener Impedance (Z_ZT)	≤15 Ω at I_ZT = 5 mA - ensures minimal voltage shift under dynamic load changes
Reverse Leakage (I_R)	≤0.7 µA at V_R = 6.5 V - guarantees low standby current in battery-powered systems
Capacitance (C)	135 pF max at V_R = 0 V, f = 1 MHz - limits high-frequency noise coupling in signal path protection
Tempco (dV_Z/dT)	+3.2 mV/°C at I_ZT = 5 mA - quantifies voltage drift across operating temperature range
ESD Rating	Class 3 (>16 kV) per HBM - provides robust handling safety during assembly and field use

Pinout & Package

SOD−523 surface-mount package: 1.20 mm × 0.80 mm body, 0.7 mm height, matte tin lead finish, void-free thermoset epoxy meeting UL 94 V−0.

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	Zener cathode terminal	Connected to higher-potential node; reverse-biased to enable breakdown regulation
2 (Anode)	Zener anode terminal	Connected to lower-potential node (e.g., ground or return path); completes bias circuit

Key Features

Feature	Design Value
Tight Zener tolerance	±3% at 5 mA - reduces calibration overhead in precision analog front-ends
Low-profile SOD−523	0.7 mm max height - enables stacking under shields or placement near connectors
Pb−Free construction	100% matte Sn lead finish - complies with RoHS and JEDEC J-STD-020 MSL 1 requirements
High ESD immunity	Class 3 (>16 kV HBM) - eliminates need for external ESD protection in handheld interfaces
Stable tempco	+3.2 mV/°C - predictable drift behavior simplifies temperature compensation algorithms

Applications

Battery Voltage Monitoring	USB Port Overvoltage Clamp
Use Scenario: Monitoring Li-ion cell voltage in wearables to trigger low-battery alerts or shutdown. IC Role / Device Role / Timing Role: Precision voltage reference for ADC input scaling and comparator threshold setting. Use Value: ±3% V_Z tolerance ensures consistent trip points across production units without per-unit trimming.	Use Scenario: Protecting USB data lines and VBUS from transient overvoltage events during hot-plug or ESD discharge. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that conducts above 8.36 V to divert surge energy. Use Value: 135 pF capacitance avoids signal integrity degradation on 480 Mbps USB 2.0 differential pairs.
RF Front-End Bias Reference	Industrial Sensor Signal Conditioning
Use Scenario: Providing stable bias voltage to LNA or mixer stages in compact IoT transceivers. IC Role / Device Role / Timing Role: Low-noise DC reference source decoupled from noisy digital supply rails. Use Value: 15 Ω Z_ZT minimizes AC impedance modulation, preserving RF gain flatness.	Use Scenario: Scaling bridge sensor outputs into 0–3.3 V range for microcontroller ADCs in factory automation modules. IC Role / Device Role / Timing Role: Stable excitation reference for ratiometric measurement architecture. Use Value: +3.2 mV/°C tempco allows accurate software compensation using single-point calibration.

Battery Voltage Monitoring

USB Port Overvoltage Clamp

Use Scenario: Monitoring Li-ion cell voltage in wearables to trigger low-battery alerts or shutdown.

IC Role / Device Role / Timing Role: Precision voltage reference for ADC input scaling and comparator threshold setting.

Use Value: ±3% V_Z tolerance ensures consistent trip points across production units without per-unit trimming.

Use Scenario: Protecting USB data lines and VBUS from transient overvoltage events during hot-plug or ESD discharge.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp that conducts above 8.36 V to divert surge energy.

Use Value: 135 pF capacitance avoids signal integrity degradation on 480 Mbps USB 2.0 differential pairs.

RF Front-End Bias Reference

Industrial Sensor Signal Conditioning

Use Scenario: Providing stable bias voltage to LNA or mixer stages in compact IoT transceivers.

IC Role / Device Role / Timing Role: Low-noise DC reference source decoupled from noisy digital supply rails.

Use Value: 15 Ω Z_ZT minimizes AC impedance modulation, preserving RF gain flatness.

Use Scenario: Scaling bridge sensor outputs into 0–3.3 V range for microcontroller ADCs in factory automation modules.

IC Role / Device Role / Timing Role: Stable excitation reference for ratiometric measurement architecture.

Use Value: +3.2 mV/°C tempco allows accurate software compensation using single-point calibration.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX584C8V2	Same 8.2 V nominal, but SOD-323 package (1.7 × 1.3 mm); 300 mW rating; ±5% tolerance	Larger footprint; higher power handling; looser tolerance	Choose when board space permits larger package and higher dissipation is needed
MMSZ5236B	SOD-123 package (3.7 × 1.6 mm); 500 mW rating; ±5% tolerance; 100 Ω Z_ZK at 1 mA	Significantly larger size; higher leakage (1 µA @ 6.5 V); less stable at low currents	Prefer for legacy designs with existing SOD-123 footprints and where cost outweighs size constraints

Compared with BZX584C8V2 and MMSZ5236B, the MM5Z8V2ST1 offers the smallest footprint (SOD−523), tightest tolerance (±3%), and lowest capacitance (135 pF), making it optimal for ultra-compact, high-precision, high-speed protection applications where layout area and signal integrity are critical.

Availability

MM5Z8V2ST1 is available at Aetrix Electronics and suitable for battery management systems, USB interface protection, RF bias networks, and industrial sensor signal conditioning requiring stable component supply and long-term manufacturability.

Supply support for MM5Z8V2ST1 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 (Nasdaq: ON) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and edge applications.

The MM5Z series is part of onsemi's precision discrete portfolio, engineered specifically for miniaturized voltage regulation and protection in portable, wearable, and high-density electronics where space, reliability, and parametric consistency are critical.

FAQ

What is the Zener voltage tolerance of MM5Z8V2ST1 at its rated test current?

The MM5Z8V2ST1 has a Zener voltage tolerance of ±3% at I_ZT = 5 mA, corresponding to a guaranteed range of 8.02 V to 8.36 V. This tight tolerance is specified in the Electrical Characteristics table on page 2 of the official onsemi datasheet (Rev. 6, April 2006). The MM5Z8V2ST1 achieves this performance through process-controlled doping and post-package screening, enabling reliable use in precision reference circuits without additional calibration.

Does MM5Z8V2ST1 support lead-free reflow soldering processes?

Yes, the MM5Z8V2ST1 uses 100% matte tin (Sn) lead finish and is qualified for Pb−free reflow soldering at peak temperatures up to 260°C. It meets JEDEC J-STD-020 MSL 1 requirements and is compatible with standard industry reflow profiles. The MM5Z8V2ST1 package is inherently Pb−free, and no special handling or pre-baking is required prior to assembly.

What is the maximum reverse leakage current for MM5Z8V2ST1, and at what voltage is it measured?

The MM5Z8V2ST1 specifies a maximum reverse leakage current (I_R) of 0.7 µA at V_R = 6.5 V, as confirmed in the Electrical Characteristics table. This low leakage ensures minimal power loss in always-on battery monitoring circuits. The value is measured at ambient temperature (25°C) and reflects the diode's ability to remain effectively non-conductive below its Zener knee voltage, supporting energy-efficient system design with the MM5Z8V2ST1.

Can MM5Z8V2ST1 be used as a substitute for MM5Z8V2ST1G?

Yes - the MM5Z8V2ST1 and MM5Z8V2ST1G share identical electrical specifications, thermal ratings, and SOD−523 mechanical dimensions. The "G" suffix denotes the same Pb−free construction; both parts meet RoHS and have matte Sn finish. No design or layout changes are needed when substituting MM5Z8V2ST1 for MM5Z8V2ST1G, and the MM5Z8V2ST1 remains fully compatible with all applications validated for the MM5Z8V2ST1G variant.

What is the thermal resistance (R_JA) of MM5Z8V2ST1 on FR-4 board, and how does it affect power derating?

The MM5Z8V2ST1 has a junction-to-ambient thermal resistance (R_JA) of 635°C/W on FR-4 board at 25°C. This value determines its steady-state power derating curve: above 25°C, allowable dissipation decreases by 1.5 mW per °C. For example, at 85°C ambient, maximum power drops to 110 mW. This thermal behavior must be accounted for in sustained-clamp or reference applications to prevent junction overheating and ensure long-term reliability of the MM5Z8V2ST1.

MM5Z8V2ST1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-79, SOD-523

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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

Tolerance:: ±2%

Power - Max:: 200 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:: -65°C ~ 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-523

MM5Z8V2ST1 FAQ

1.How can I place an order for MM5Z8V2ST1 through Aetrix?

Please submit a Request for Quotation (RFQ) for MM5Z8V2ST1 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 MM5Z8V2ST1 reliable?

The price and inventory of MM5Z8V2ST1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM5Z8V2ST1 is usually 5 days.

3.What payment methods are accepted for MM5Z8V2ST1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM5Z8V2ST1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MM5Z8V2ST1?

MM5Z8V2ST1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MM5Z8V2ST1 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 MM5Z8V2ST1?

For technical support, including MM5Z8V2ST1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM5Z8V2ST1 requirements.

6.How does Aetrix verify that MM5Z8V2ST1 is sourced from the original manufacturer or authorized distributors?

All MM5Z8V2ST1 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 MM5Z8V2ST1 meets industry standards.

7.What is the process for return or replacement of MM5Z8V2ST1?

All MM5Z8V2ST1 units undergo pre-shipment inspection (PSI). If there is an issue with MM5Z8V2ST1, 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 MM5Z8V2ST1 part is unused and in its original packaging.

Return procedure for MM5Z8V2ST1:

1.Submit a request within 90 days.

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

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