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

onsemi MMSZ3V6T1

Name: MMSZ3V6T1
Brand: onsemi
SKU: MMSZ3V6T1
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMSZ3V6T1

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: MMSZ3V6T1.pdf

Description:: DIODE ZENER 3.6V 500MW SOD123

Quantity:: RFQ Add To RFQ list

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Inventory:4,161

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Product details

Overview

MMSZ3V6T1 from onsemi is a 3.6 V ±5% Zener voltage regulator diode in SOD−123 surface-mount package, rated for 500 mW power dissipation at 75°C on FR−5 board, with 90 Ω maximum dynamic impedance at 5 mA test current and 5 µA maximum reverse leakage at 1 V reverse bias - used for precision low-voltage reference and overvoltage clamping in power management circuits.

For engineers reviewing the MMSZ3V6T1 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 real-world design implications for voltage regulation in space-constrained DC-DC feedback paths and I/O protection networks.

Technical Context

This device operates as a two-terminal, silicon planar Zener diode optimized for stable reverse-bias voltage regulation. Its 3.6 V nominal Zener voltage is specified at I_ZT = 5 mA with ±5% tolerance, and exhibits a temperature coefficient near zero (≈0 mV/°C) due to its mid-range breakdown voltage.

Thermal performance is defined by R_JA = 340 °C/W and R_JL = 150 °C/W, enabling predictable power derating above 75°C ambient. The SOD−123 package supports automated placement and provides UL 94 V−0 flammability rating with corrosion-resistant, solderable finish.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	3.42–3.78 V @ I_ZT = 5 mA - defines tight regulation window for 3.3 V rail monitoring and clamping.
Power Dissipation (P_D)	500 mW @ T_L = 75°C - sets maximum continuous DC power handling on standard PCBs.
Zener Impedance (Z_ZT)	≤90 Ω @ I_ZT = 5 mA - ensures minimal output voltage variation under load transients.
Reverse Leakage (I_R)	≤5 µA @ V_R = 1 V - guarantees negligible quiescent current in high-impedance sensing nodes.
ESD Rating	Class 3 (>16 kV) per HBM - enables direct use on exposed I/O lines without additional protection.
Operating Temperature	−55°C to +150°C - supports automotive under-hood and industrial control environments.
AEC−Q101 Qualified	Yes - validated for automotive electronics per stress test requirements (HTOL, TC, AC/DC).

Pinout & Package

SOD−123 plastic surface-mount package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with cathode polarity band. Lead-free (Pb−Free) construction, UL 94 V−0 rated, solderable per 260°C/10 s reflow profile.

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

Key Features

Feature	Design Value
500 mW Power Rating on FR−5 Board	Enables reliable regulation in compact power supplies without forced cooling or heatsinking.
±5% Zener Voltage Tolerance	Supports accurate 3.3 V system-level voltage supervision without post-production trimming.
Class 3 ESD Robustness (>16 kV HBM)	Eliminates need for external TVS diodes in low-speed interface protection circuits.
AEC−Q101 Qualification	Validates long-term reliability for automotive body control modules and infotainment power rails.
Small SOD−123 Footprint	Reduces PCB area by >50% vs. DO-35 through-hole Zeners, enabling high-density layout.

Applications

3.3 V LDO Feedback Reference	USB Port Overvoltage Clamp
Use Scenario: Stabilizing output voltage of a 3.3 V low-dropout regulator via resistor divider feedback network. IC Role / Device Role / Timing Role: Precision voltage reference element setting regulation threshold. Use Value: Tight 3.42–3.78 V range ensures ±1.5% output accuracy across temperature and line variations.	Use Scenario: Protecting downstream USB data and power pins from transient overvoltage events. IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to safe levels before IC damage occurs. Use Value: 90 Ω dynamic impedance and 5 µA leakage enable rapid response with minimal standby current draw.
Microcontroller Reset Circuit	Industrial Sensor Signal Conditioning
Use Scenario: Generating clean, temperature-stable reset signal when supply drops below 3.3 V threshold. IC Role / Device Role / Timing Role: Voltage threshold detector triggering POR or brown-out reset logic. Use Value: −55°C to +150°C operating range ensures reliable reset assertion in wide-temperature embedded systems.	Use Scenario: Biasing and level-shifting analog sensor outputs in 3.3 V industrial I/O modules. IC Role / Device Role / Timing Role: Stable DC bias reference for op-amp input stages and ADC reference dividers. Use Value: Low 5 µA leakage prevents loading of high-impedance sensor bridges and thermistor networks.

3.3 V LDO Feedback Reference

USB Port Overvoltage Clamp

Use Scenario: Stabilizing output voltage of a 3.3 V low-dropout regulator via resistor divider feedback network.

IC Role / Device Role / Timing Role: Precision voltage reference element setting regulation threshold.

Use Value: Tight 3.42–3.78 V range ensures ±1.5% output accuracy across temperature and line variations.

Use Scenario: Protecting downstream USB data and power pins from transient overvoltage events.

IC Role / Device Role / Timing Role: Fast-acting shunt clamp limiting voltage to safe levels before IC damage occurs.

Use Value: 90 Ω dynamic impedance and 5 µA leakage enable rapid response with minimal standby current draw.

Microcontroller Reset Circuit

Industrial Sensor Signal Conditioning

Use Scenario: Generating clean, temperature-stable reset signal when supply drops below 3.3 V threshold.

IC Role / Device Role / Timing Role: Voltage threshold detector triggering POR or brown-out reset logic.

Use Value: −55°C to +150°C operating range ensures reliable reset assertion in wide-temperature embedded systems.

Use Scenario: Biasing and level-shifting analog sensor outputs in 3.3 V industrial I/O modules.

IC Role / Device Role / Timing Role: Stable DC bias reference for op-amp input stages and ADC reference dividers.

Use Value: Low 5 µA leakage prevents loading of high-impedance sensor bridges and thermistor networks.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX384-B3V6	Same 3.6 V nominal, ±5% tolerance, but 300 mW rating and SOD-323 package (smaller footprint, lower power).	Lower power dissipation limits use in higher-current regulation paths; better suited for ultra-low-power sensor nodes.	Select BZX384-B3V6 only when board space is critical and load current remains <2 mA.
1N4728A	Through-hole DO-41 package, same 3.6 V nominal, ±5%, but 1 W rating and higher Z_ZT (10 Ω typical).	Requires PCB mounting holes and manual assembly; unsuitable for automated SMT production.	Choose 1N4728A only for prototyping, repair, or legacy through-hole designs where rework is acceptable.

Compared with BZX384-B3V6 and 1N4728A, the MMSZ3V6T1 offers optimal balance of SMT compatibility, 500 mW capability, and automotive-grade reliability - making it preferred for volume-manufactured 3.3 V power rails requiring AEC−Q101 compliance and thermal stability.

Availability

MMSZ3V6T1 is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer USB power management requiring stable component supply, consistent parametric performance, and full traceability.

Supply support for MMSZ3V6T1 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 MMSZ3V6T1 belongs to the MMSZxxxT1G Zener regulator series designed specifically for high-reliability, surface-mount voltage reference and clamping in space-constrained, thermally demanding environments.

FAQ

What is the exact Zener voltage tolerance for MMSZ3V6T1?

The MMSZ3V6T1 has a guaranteed Zener voltage range of 3.42 V to 3.78 V at I_ZT = 5 mA and T_A = 25°C, corresponding to ±5% tolerance about the nominal 3.6 V value. This tolerance remains valid across the full −55°C to +150°C operating temperature range per onsemi's characterization data.

Is MMSZ3V6T1 qualified for automotive applications?

Yes, the MMSZ3V6T1 is AEC−Q101 qualified and PPAP capable. It undergoes rigorous stress testing including high-temperature operating life (HTOL), temperature cycling (TC), and biased highly accelerated stress testing (BHAST), confirming suitability for automotive body control, lighting, and infotainment subsystems.

What is the maximum reverse leakage current for MMSZ3V6T1 at 1 V bias?

The MMSZ3V6T1 exhibits ≤5 µA maximum reverse leakage current at V_R = 1 V and T_A = 25°C. This low leakage ensures minimal impact on high-impedance feedback networks and battery-powered sensor circuits where standby current must be tightly controlled.

Can MMSZ3V6T1 replace MMSZ3V6T1G?

No - MMSZ3V6T1 is not a valid part number in onsemi's official documentation. The correct, currently manufactured version is MMSZ3V6T1G (with "G" suffix indicating Pb−Free compliance). MMSZ3V6T1G is the only version supported in datasheet Rev. 13 and qualifies for RoHS and ELV compliance.

What is the thermal resistance from junction to ambient for MMSZ3V6T1G?

The MMSZ3V6T1G has a thermal resistance of R_JA = 340 °C/W when mounted on FR−5 board per onsemi's infrared scan measurement method. This value governs steady-state power derating above 75°C ambient and must be applied in thermal design calculations for continuous operation.

MMSZ3V6T1 Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 3.6 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 90 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 1 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

MMSZ3V6T1 FAQ

1.How can I place an order for MMSZ3V6T1 through Aetrix?

Please submit a Request for Quotation (RFQ) for MMSZ3V6T1 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 MMSZ3V6T1 reliable?

The price and inventory of MMSZ3V6T1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ3V6T1 is usually 5 days.

3.What payment methods are accepted for MMSZ3V6T1?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ3V6T1 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMSZ3V6T1?

MMSZ3V6T1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMSZ3V6T1 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 MMSZ3V6T1?

For technical support, including MMSZ3V6T1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ3V6T1 requirements.

6.How does Aetrix verify that MMSZ3V6T1 is sourced from the original manufacturer or authorized distributors?

All MMSZ3V6T1 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 MMSZ3V6T1 meets industry standards.

7.What is the process for return or replacement of MMSZ3V6T1?

All MMSZ3V6T1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ3V6T1, 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 MMSZ3V6T1 part is unused and in its original packaging.

Return procedure for MMSZ3V6T1:

1.Submit a request within 90 days.

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

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