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

onsemi MMSZ4V7T3G

Name: MMSZ4V7T3G
Brand: onsemi
SKU: MMSZ4V7T3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMSZ4V7T3G

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: MMSZ4V7T3G.pdf

Description:: DIODE ZENER 4.7V 500MW SOD123

Quantity:: RFQ Add To RFQ list

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Inventory:6,636

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Product details

Overview

MMSZ4V7T3G from onsemi is a 4.7 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at 75°C on FR−5 board, with 80 Ω dynamic impedance at 5 mA and 3 μA reverse leakage at 2 V, used for precision voltage reference and overvoltage protection in low-power analog circuits.

For engineers reviewing the MMSZ4V7T3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, AEC−Q101 qualification status, Pb−free compliance, and direct alternative part comparisons grounded in onsemi's official specifications.

Technical Context

This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown at nominal 4.7 V with ±5% tolerance (4.47–4.94 V), specified at I_ZT = 5 mA. Its 80 Ω Zener impedance (ZZT) ensures stable regulation under small-signal AC load variations.

Thermal performance is defined by R_JA = 340 °C/W and R_JL = 150 °C/W, with junction temperature range −55 °C to +150 °C. It meets Class 3 ESD rating (>16 kV HBM) and is AEC−Q101 qualified for automotive use.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	4.7 V nominal, ±5% tolerance (4.47–4.94 V @ I_ZT = 5 mA); sets precise clamping/reference level
Power Dissipation (P_D)	500 mW @ T_L = 75°C on FR−5 board; derates 6.7 mW/°C above 75°C
Zener Impedance (Z_ZT)	80 Ω max @ I_ZT = 5 mA, 1 kHz AC signal; determines regulation stiffness under dynamic loads
Reverse Leakage (I_R)	3 μA max @ V_R = 2 V; defines minimum off-state current in voltage-sensing paths
Forward Voltage (V_F)	0.95 V max @ I_F = 10 mA; enables bidirectional clamping when used with series resistor
ESD Rating	Class 3 (>16 kV) per Human Body Model; supports robust handling in automated assembly
Qualification	AEC−Q101 qualified; validated for automotive electronics reliability requirements

Pinout & Package

SOD−123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case, cathode indicated by band, UL 94 V−0 flammability rating, Pb−free, reflow solderable up to 260°C for 10 seconds.

Pin/Terminal	Circuit Role	Design Meaning
1 (Banded End)	Cathode	Connected to regulated output node; reverse-biased during Zener operation
2 (Non-banded End)	Anode	Connected to ground or lower-potential rail; completes conduction path during breakdown

Key Features

Feature	Design Value
500 mW Power Rating	Enables stable voltage clamping in space-constrained PCBs without external heatsinking
±5% Zener Tolerance	Supports tight reference accuracy in feedback loops of LDOs and DC−DC converters
AEC−Q101 Qualification	Validates long-term reliability for automotive body control modules and sensor interfaces
Class 3 ESD Robustness	Eliminates need for additional ESD protection in front-end signal conditioning circuits
Pb−Free SOD−123 Package	Complies with RoHS and ELV directives while maintaining compatibility with standard reflow profiles

Applications

Automotive Sensor Reference	Industrial Analog Input Protection
Use Scenario: Providing stable 4.7 V reference for analog-to-digital conversion in vehicle cabin temperature sensors. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for ADC biasing and sensor excitation. Use Value: Maintains <±1% reference drift across −40°C to +125°C ambient due to low TC and AEC−Q101 validation.	Use Scenario: Clamping transient overvoltage on 4–20 mA current loop inputs in PLC analog input modules. IC Role / Device Role / Timing Role: Shunt protector limiting input voltage to 4.7 V before op-amp front-end stage. Use Value: Absorbs 500 mW surge energy without degradation, preventing op-amp latch-up during EFT events.
Low-Power IoT Voltage Monitor	Consumer Audio Bias Supply
Use Scenario: Monitoring battery voltage in BLE-enabled wearables using resistive divider + comparator. IC Role / Device Role / Timing Role: Precision Zener reference for comparator threshold setting. Use Value: Delivers 4.7 V reference with only 3 μA leakage, extending coin-cell battery life beyond 2 years.	Use Scenario: Generating clean bias voltage for electret microphone preamplifiers in portable speakers. IC Role / Device Role / Timing Role: Low-noise shunt regulator stabilizing microphone supply rail. Use Value: 80 Ω Zener impedance minimizes audio-band ripple, reducing audible hiss in sensitive analog stages.

Automotive Sensor Reference

Industrial Analog Input Protection

Use Scenario: Providing stable 4.7 V reference for analog-to-digital conversion in vehicle cabin temperature sensors.

IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for ADC biasing and sensor excitation.

Use Value: Maintains <±1% reference drift across −40°C to +125°C ambient due to low TC and AEC−Q101 validation.

Use Scenario: Clamping transient overvoltage on 4–20 mA current loop inputs in PLC analog input modules.

IC Role / Device Role / Timing Role: Shunt protector limiting input voltage to 4.7 V before op-amp front-end stage.

Use Value: Absorbs 500 mW surge energy without degradation, preventing op-amp latch-up during EFT events.

Low-Power IoT Voltage Monitor

Consumer Audio Bias Supply

Use Scenario: Monitoring battery voltage in BLE-enabled wearables using resistive divider + comparator.

IC Role / Device Role / Timing Role: Precision Zener reference for comparator threshold setting.

Use Value: Delivers 4.7 V reference with only 3 μA leakage, extending coin-cell battery life beyond 2 years.

Use Scenario: Generating clean bias voltage for electret microphone preamplifiers in portable speakers.

IC Role / Device Role / Timing Role: Low-noise shunt regulator stabilizing microphone supply rail.

Use Value: 80 Ω Zener impedance minimizes audio-band ripple, reducing audible hiss in sensitive analog stages.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C4V7LT1G	Same 4.7 V ±5%, but SOT−23 package (higher R_JA = 375 °C/W); 500 mW rating only at T_L = 50°C	Less thermal margin in high-density layouts; not AEC−Q101 qualified	Select when footprint compatibility with SOT−23 is required and automotive qualification is unnecessary
MMSZ4702T1G	Identical SOD−123 package and AEC−Q101 qualification, but tighter 4.7 V ±2% tolerance (4.61–4.79 V)	Higher cost; used where reference accuracy exceeds ±5% requirement	Select when system-level calibration budget requires sub-1% absolute voltage error at 25°C

Compared with BZX84-C4V7LT1G and MMSZ4702T1G, the MMSZ4V7T3G balances automotive-grade reliability, industry-standard ±5% tolerance, and 10,000-unit tape-and-reel packaging-making it optimal for high-volume automotive and industrial production where cost, qualification, and logistics alignment matter.

Availability

MMSZ4V7T3G is available at Aetrix Electronics and suitable for automotive sensor modules, industrial analog I/O protection, and low-power IoT voltage monitoring requiring stable component supply and full traceability.

Supply support for MMSZ4V7T3G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions.

The MMSZxxxT1G Series is designed for precision voltage regulation and transient suppression in space-constrained, high-reliability applications including automotive electronics and industrial control systems.

FAQ

What is the Zener voltage tolerance of MMSZ4V7T3G?

The MMSZ4V7T3G has a nominal Zener voltage of 4.7 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 4.47 V and 4.94 V when tested 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, and applies across the full operating temperature range.

Is MMSZ4V7T3G suitable for automotive applications?

Yes, the MMSZ4V7T3G is AEC−Q101 qualified and PPAP capable, making it suitable for automotive applications such as body control modules, sensor interfaces, and infotainment power rails. Its qualification covers stress testing for temperature cycling, humidity, and mechanical shock-ensuring reliability in harsh vehicular environments.

What is the maximum power dissipation of MMSZ4V7T3G at 100°C ambient?

At 100°C ambient, the MMSZ4V7T3G must be derated from its 500 mW rating at 75°C. With a derating factor of 6.7 mW/°C, the allowable power drops to 332.5 mW (500 − 6.7 × (100 − 75)). This value assumes mounting on FR−5 board per datasheet Note 1 and reflects real-world thermal limits for continuous operation.

Does MMSZ4V7T3G have Pb−free construction?

Yes, the "G" suffix in MMSZ4V7T3G explicitly denotes Pb−free packaging, compliant with RoHS Directive 2011/65/EU and JEDEC J-STD-609. The device uses lead-free terminations and conforms to onsemi's Pb−free strategy, with full documentation available in the Soldering and Mounting Techniques Reference Manual (SOLDERRM/D).

How does the Zener impedance of MMSZ4V7T3G affect circuit stability?

The MMSZ4V7T3G exhibits a maximum dynamic impedance (Z_ZT) of 80 Ω at I_ZT = 5 mA and 1 kHz. This low impedance ensures minimal voltage variation under small-signal load changes-critical for maintaining reference accuracy in feedback networks of voltage regulators and comparators.

MMSZ4V7T3G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Voltage - Zener (Nom) (Vz):: 4.7 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 80 Ohms

Current - Reverse Leakage @ Vr:: 3 µA @ 2 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

MMSZ4V7T3G FAQ

1.How can I place an order for MMSZ4V7T3G through Aetrix?

Please submit a Request for Quotation (RFQ) for MMSZ4V7T3G 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 MMSZ4V7T3G reliable?

The price and inventory of MMSZ4V7T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4V7T3G is usually 5 days.

3.What payment methods are accepted for MMSZ4V7T3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4V7T3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMSZ4V7T3G?

MMSZ4V7T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMSZ4V7T3G 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 MMSZ4V7T3G?

For technical support, including MMSZ4V7T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4V7T3G requirements.

6.How does Aetrix verify that MMSZ4V7T3G is sourced from the original manufacturer or authorized distributors?

All MMSZ4V7T3G 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 MMSZ4V7T3G meets industry standards.

7.What is the process for return or replacement of MMSZ4V7T3G?

All MMSZ4V7T3G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4V7T3G, 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 MMSZ4V7T3G part is unused and in its original packaging.

Return procedure for MMSZ4V7T3G:

1.Submit a request within 90 days.

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

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