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

onsemi MM3Z8V2T1

Name: MM3Z8V2T1
Brand: onsemi
SKU: MM3Z8V2T1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MM3Z8V2T1

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SC-76, SOD-323

Datasheet:: MM3Z8V2T1.pdf

Description:: DIODE ZENER 8.2V 200MW SOD323

Quantity:: RFQ Add To RFQ list

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Inventory:8,020

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Product details

Overview

MM3Z8V2T1 from onsemi is a 200 mW SOD−323 surface-mount Zener diode with nominal reverse breakdown voltage of 8.2 V at 5 mA test current, ±0.5 V tolerance, dynamic impedance of 15 Ω at IZT, and leakage current ≤0.7 µA at 5.0 V reverse bias. It provides precision voltage regulation in space-constrained portable electronics.

For engineers reviewing the MM3Z8V2T1 datasheet, pinout, applications, or equivalent options, key selection factors include its 8.2 V Zener voltage tolerance, 15 Ω impedance at 5 mA, −65 °C to +150 °C operating temperature range, Pb-free SOD−323 package, and ESD rating >16 kV per HBM.

Technical Context

This Zener regulator operates in reverse-biased breakdown mode to maintain stable reference voltage under varying load and input conditions. Its low 15 Ω dynamic impedance at 5 mA ensures minimal voltage deviation across moderate current changes.

The device features a temperature coefficient of +3.2 mV/°C, enabling predictable voltage drift over temperature, and exhibits 135 pF capacitance at 0 V bias and 1 MHz - suitable for low-frequency regulation without signal coupling concerns.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	7.7 V min / 8.2 V nom / 8.7 V max @ I_ZT = 5 mA - defines tight regulation window for 8.2 V reference designs
Zener Impedance (Z_ZT)	15 Ω max @ I_ZT = 5 mA - ensures <±40 mV output shift for ±0.6 mA load change
Power Dissipation	200 mW @ T_A = 25°C - supports continuous operation in compact PCB layouts with minimal heatsinking
Leakage Current (I_R)	≤0.7 µA @ V_R = 5.0 V - enables ultra-low standby power in battery-backed circuits
Capacitance (C)	135 pF @ V_R = 0 V, f = 1 MHz - avoids signal integrity issues in DC/low-speed analog references
ESD Rating	Class 3 (>16 kV) per HBM - withstands handling and assembly without protection circuitry
Operating Temp	−65 °C to +150 °C - qualified for automotive under-hood and industrial control environments

Pinout & Package

SOD−323 plastic surface-mount package (Case 477−02), 1.7 mm × 1.25 mm × 0.9 mm body, cathode indicated by polarity band. Mounting position unrestricted; compatible with standard reflow profiles (260°C/10 s).

Pin/Terminal	Circuit Role	Design Meaning
1 (Cathode)	Zener anode connection point in reverse-bias configuration	Connected to regulated voltage rail; polarity band identifies this terminal for correct orientation during placement
2 (Anode)	Zener cathode connection point in reverse-bias configuration	Connected to ground or lower-potential node; completes reverse-bias path for regulation

Key Features

Feature	Design Value
Pb-Free SOD−323 Package	RoHS-compliant construction with Sn-only or Pb−Sn plating; meets IPC/JEDEC J-STD-020 moisture sensitivity level 1
Low Profile Height	0.9 mm max height - enables stacking under shields or beneath connectors in ultra-thin handheld PCBs
High ESD Robustness	Class 3 HBM (>16 kV) - eliminates need for external TVS in many consumer interface circuits
Tight Voltage Tolerance	±0.5 V at 8.2 V nominal - reduces calibration overhead in precision ADC reference or LDO feedback paths
Stable Tempco	+3.2 mV/°C - allows accurate compensation in temperature-varying sensor supply rails

Applications

Battery Voltage Monitor	USB Port Overvoltage Clamp
Use Scenario: Monitoring Li-ion cell voltage in wearables using microcontroller ADC with internal reference. IC Role / Device Role / Timing Role: Provides stable 8.2 V Zener reference for resistive divider scaling battery voltage into ADC input range. Use Value: Tight 7.7–8.7 V tolerance ensures ±0.6% full-scale accuracy in 0–4.2 V battery measurement without software calibration.	Use Scenario: Protecting USB data lines from transient overvoltage during hot-plug events. IC Role / Device Role / Timing Role: Acts as shunt clamp between D+ and ground, triggering conduction above 8.2 V to divert surge current. Use Value: 15 Ω dynamic impedance limits clamping voltage overshoot to <8.5 V during 1 A transients, preserving PHY integrity.
Industrial Sensor Excitation	Programmable Logic Supply Clamp
Use Scenario: Providing excitation voltage to 4–20 mA loop-powered pressure sensors in factory automation. IC Role / Device Role / Timing Role: Regulates 8.2 V supply rail for op-amp biasing and current-sense amplifier reference. Use Value: −65 °C to +150 °C operating range ensures stable performance inside sealed enclosures exposed to ambient extremes.	Use Scenario: Clamping FPGA I/O bank supply (VCCIO) during power sequencing anomalies. IC Role / Device Role / Timing Role: Shunt regulator placed between VCCIO and ground to prevent overvoltage damage during brown-out recovery. Use Value: 200 mW power rating sustains 25 mA clamp current continuously, covering worst-case 200 ms power-up surges.

Battery Voltage Monitor

USB Port Overvoltage Clamp

Use Scenario: Monitoring Li-ion cell voltage in wearables using microcontroller ADC with internal reference.

IC Role / Device Role / Timing Role: Provides stable 8.2 V Zener reference for resistive divider scaling battery voltage into ADC input range.

Use Value: Tight 7.7–8.7 V tolerance ensures ±0.6% full-scale accuracy in 0–4.2 V battery measurement without software calibration.

Use Scenario: Protecting USB data lines from transient overvoltage during hot-plug events.

IC Role / Device Role / Timing Role: Acts as shunt clamp between D+ and ground, triggering conduction above 8.2 V to divert surge current.

Use Value: 15 Ω dynamic impedance limits clamping voltage overshoot to <8.5 V during 1 A transients, preserving PHY integrity.

Industrial Sensor Excitation

Programmable Logic Supply Clamp

Use Scenario: Providing excitation voltage to 4–20 mA loop-powered pressure sensors in factory automation.

IC Role / Device Role / Timing Role: Regulates 8.2 V supply rail for op-amp biasing and current-sense amplifier reference.

Use Value: −65 °C to +150 °C operating range ensures stable performance inside sealed enclosures exposed to ambient extremes.

Use Scenario: Clamping FPGA I/O bank supply (VCCIO) during power sequencing anomalies.

IC Role / Device Role / Timing Role: Shunt regulator placed between VCCIO and ground to prevent overvoltage damage during brown-out recovery.

Use Value: 200 mW power rating sustains 25 mA clamp current continuously, covering worst-case 200 ms power-up surges.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B8V2	Same 8.2 V nominal Zener voltage, but 300 mW power rating and SOD-323 package; higher leakage (1 µA @ 5 V)	Higher power margin suits higher-current reference loads; less suitable for ultra-low-I_Q battery systems	Select BZX384-B8V2 when >200 mW dissipation headroom is required and leakage <0.7 µA is not critical
MMSZ4687	8.2 V nominal, but 500 mW rating and SOD-123 package; larger footprint (3.7 mm × 1.6 mm) and higher thermal resistance	Supports higher continuous current but occupies 2.2× more board area; incompatible with high-density SOD−323 layouts	Choose MMSZ4687 only if layout allows SOD-123 and thermal design requires >200 mW dissipation capability

Compared with BZX384-B8V2 and MMSZ4687, the MM3Z8V2T1 delivers optimal balance of ultra-compact size, low leakage, and sufficient power for portable reference and clamp roles - making it preferred where board space and standby current are constrained.

Availability

MM3Z8V2T1 is available at Aetrix Electronics and suitable for battery management systems, USB interface protection, industrial sensor excitation, and FPGA I/O clamping requiring stable component supply and RoHS compliance.

Supply support for MM3Z8V2T1 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 (formerly ON Semiconductor) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The MM3Z8V2T1 belongs to the MM3Z2V4T1 series of 200 mW Zener regulators designed specifically for space-constrained, high-reliability voltage reference and overvoltage protection in portable and dense PCB environments.

FAQ

What is the maximum steady-state power dissipation of the MM3Z8V2T1?

The MM3Z8V2T1 has a maximum steady-state power dissipation of 200 mW at 25°C ambient temperature, derating linearly by 1.5 mW/°C above that temperature. This rating is verified on FR-4 board with minimum pad layout per datasheet Note 1 and defines the safe continuous operating envelope for thermal design.

Does the MM3Z8V2T1 have a Pb-free option?

Yes, the MM3Z8V2T1G suffix denotes the Pb-free version of the MM3Z8V2T1, with Sn-only plating on leads and compliant with RoHS Directive 2011/65/EU. Both MM3Z8V2T1 and MM3Z8V2T1G share identical electrical specifications and SOD−323 mechanical dimensions.

What is the Zener impedance of the MM3Z8V2T1 at its test current?

The MM3Z8V2T1 has a maximum Zener impedance (Z_ZT) of 15 Ω measured at the specified test current I_ZT = 5 mA. This value reflects dynamic resistance in breakdown and directly impacts output voltage stability under load variations in regulation circuits.

How is polarity identified on the MM3Z8V2T1 package?

The MM3Z8V2T1 uses a cathode band marking on the SOD−323 body to identify Pin 1 (Cathode); Pin 2 is the Anode. This polarity band aligns with industry-standard SOD−323 orientation and must be correctly aligned during PCB layout and pick-and-place to ensure proper reverse-bias operation.

What is the leakage current specification for the MM3Z8V2T1?

The MM3Z8V2T1 specifies a maximum reverse leakage current (I_R) of 0.7 µA at V_R = 5.0 V and T_A = 25°C. This low leakage supports ultra-low-power applications such as coin-cell-powered monitors where standby current must remain below 1 µA.

MM3Z8V2T1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SC-76, SOD-323

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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

Tolerance:: ±6%

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-323

MM3Z8V2T1 FAQ

1.How can I place an order for MM3Z8V2T1 through Aetrix?

Please submit a Request for Quotation (RFQ) for MM3Z8V2T1 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 MM3Z8V2T1 reliable?

The price and inventory of MM3Z8V2T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MM3Z8V2T1 is usually 5 days.

3.What payment methods are accepted for MM3Z8V2T1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MM3Z8V2T1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MM3Z8V2T1?

MM3Z8V2T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MM3Z8V2T1 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 MM3Z8V2T1?

For technical support, including MM3Z8V2T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MM3Z8V2T1 requirements.

6.How does Aetrix verify that MM3Z8V2T1 is sourced from the original manufacturer or authorized distributors?

All MM3Z8V2T1 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 MM3Z8V2T1 meets industry standards.

7.What is the process for return or replacement of MM3Z8V2T1?

All MM3Z8V2T1 units undergo pre-shipment inspection (PSI). If there is an issue with MM3Z8V2T1, 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 MM3Z8V2T1 part is unused and in its original packaging.

Return procedure for MM3Z8V2T1:

1.Submit a request within 90 days.

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

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