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

onsemi MMSZ10T3G

Name: MMSZ10T3G
Brand: onsemi
SKU: MMSZ10T3G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MMSZ10T3G

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: MMSZ10T3G.pdf

Description:: DIODE ZENER 10V 500MW SOD123

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Product details

Overview

MMSZ10T3G from onsemi is a 10 V, ±5% tolerance Zener diode in SOD−123 package, rated for 500 mW power dissipation at 75°C, with 20 Ω dynamic impedance at 5 mA and 0.2 μA reverse leakage at 7.6 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power management circuits.

For engineers reviewing the MMSZ10T3G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, AEC−Q101 qualification status, and direct alternatives for automotive and industrial voltage regulation designs.

Technical Context

The MMSZ10T3G operates as a two-terminal silicon Zener diode optimized for stable reverse-bias breakdown at nominal 10 V. Its 20 Ω Zener impedance (ZZT) at IZT = 5 mA ensures tight regulation under moderate load transients, while its −55°C to +150°C junction temperature range supports operation in harsh environments.

Thermal resistance of 340°C/W (Junction-to-Ambient) and 150°C/W (Junction-to-Lead) defines its power handling limits on FR−5 board. Derating begins above 75°C at 6.7 mW/°C, and ESD robustness exceeds 16 kV per Human Body Model-critical for automated assembly and field reliability.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	9.50–10.50 V @ I_ZT = 5 mA; enables precise 10 V reference with ±5% tolerance for feedback loops and sensing.
Power Dissipation (P_D)	500 mW @ T_L = 75°C; supports continuous regulation in compact PCB layouts without forced cooling.
Zener Impedance (Z_ZT)	20 Ω @ I_ZT = 5 mA; minimizes output voltage variation during current changes in reference applications.
Reverse Leakage (I_R)	0.2 μA @ V_R = 7.6 V; ensures negligible quiescent current draw in battery-powered or high-impedance bias networks.
Thermal Resistance (R_JA)	340°C/W; determines maximum ambient temperature rise before exceeding 150°C junction limit at full power.
ESD Rating	Class 3 (>16 kV HBM); eliminates need for external ESD protection in board-level handling and end-use environments.
AEC−Q101 Qualified	Yes; validated for automotive electronics including body control modules and sensor interfaces requiring stress-tested reliability.

Pinout & Package

SOD−123 surface-mount package: 1.60 mm × 2.69 mm × 1.16 mm, void-free thermosetting plastic case with cathode band marking; polarity band denotes Pin 1 (Cathode), Pin 2 (Anode).

Pin/Terminal	Circuit Role	Design Meaning
Pin 1 (Banded End)	Cathode	Connected to regulated voltage node; reverse-biased terminal where Zener breakdown occurs at 10 V.
Pin 2 (Non-banded End)	Anode	Connected to ground or lower-potential rail; completes current path during regulation or clamping operation.

Key Features

Feature	Design Value
Pb−Free SOD−123 Package	RoHS-compliant footprint compatible with standard reflow profiles and automated pick-and-place systems.
High-Density Mounting	Small 1.60 × 2.69 mm outline allows placement in space-constrained areas such as portable medical sensors or IoT edge nodes.
Optimized Thermal Performance	150°C/W Junction-to-Lead resistance enables effective heat transfer to copper pour or thermal pad on PCB.
Automotive-Grade Qualification	AEC−Q101 qualification confirms suitability for under-hood and infotainment subsystems without additional reliability screening.

Applications

Automotive Sensor Reference	Industrial Power Supply Clamp
Use Scenario: Providing stable 10 V reference for analog signal conditioning in engine coolant temperature sensors. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference potential for ADC input scaling. Use Value: Maintains <±1% reference accuracy across −40°C to +125°C ambient due to low TC and AEC−Q101 validation.	Use Scenario: Clamping transient overvoltage spikes on 12 V rail in PLC I/O modules during relay switching. IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing surge energy to protect downstream LDOs and microcontrollers. Use Value: Withstands 100 W nonrepetitive surge (1 ms pulse) and holds clamp voltage within 10.6 V max under 5 mA surge current.
Portable Medical Device Bias	Consumer Audio DC Offset Correction
Use Scenario: Generating low-noise bias voltage for op-amp input stages in handheld ECG front-ends. IC Role / Device Role / Timing Role: Low-leakage (0.2 μA) Zener providing stable DC offset without loading high-impedance electrode inputs. Use Value: Enables >10 GΩ input impedance preservation and sub-μV drift performance via minimal leakage and tight V_Z tolerance.	Use Scenario: Setting DC bias point for Class-AB headphone amplifier output stage to eliminate audible pop during power-up. IC Role / Device Role / Timing Role: Precision 10 V reference establishing quiescent operating point for complementary transistor pair. Use Value: 20 Ω Z_ZT ensures stable bias under varying load currents, reducing THD by minimizing voltage sag during peak audio transients.

Automotive Sensor Reference

Industrial Power Supply Clamp

Use Scenario: Providing stable 10 V reference for analog signal conditioning in engine coolant temperature sensors.

IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to fix reference potential for ADC input scaling.

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

Use Scenario: Clamping transient overvoltage spikes on 12 V rail in PLC I/O modules during relay switching.

IC Role / Device Role / Timing Role: Two-terminal shunt regulator absorbing surge energy to protect downstream LDOs and microcontrollers.

Use Value: Withstands 100 W nonrepetitive surge (1 ms pulse) and holds clamp voltage within 10.6 V max under 5 mA surge current.

Portable Medical Device Bias

Consumer Audio DC Offset Correction

Use Scenario: Generating low-noise bias voltage for op-amp input stages in handheld ECG front-ends.

IC Role / Device Role / Timing Role: Low-leakage (0.2 μA) Zener providing stable DC offset without loading high-impedance electrode inputs.

Use Value: Enables >10 GΩ input impedance preservation and sub-μV drift performance via minimal leakage and tight V_Z tolerance.

Use Scenario: Setting DC bias point for Class-AB headphone amplifier output stage to eliminate audible pop during power-up.

IC Role / Device Role / Timing Role: Precision 10 V reference establishing quiescent operating point for complementary transistor pair.

Use Value: 20 Ω Z_ZT ensures stable bias under varying load currents, reducing THD by minimizing voltage sag during peak audio 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
BZX584C10	Same 10 V nominal, ±5% tolerance, but 300 mW rating and SOD-323 package (smaller, higher R_JA = 450°C/W).	Lower power handling limits use in >100 mA clamp scenarios; not recommended for sustained 500 mW operation.	Select when board area is critical and thermal margin permits lower derated power.
1N4740A	Through-hole DO-41 package, 10 V, ±5%, 1 W rating, higher ZZT (17 Ω), but no AEC−Q101 qualification.	Not suitable for automotive or high-reliability surface-mount production; requires wave soldering or hand assembly.	Select for prototyping, legacy repair, or cost-sensitive non-automotive applications where manual assembly is acceptable.

Compared with BZX584C10 and 1N4740A, the MMSZ10T3G uniquely combines SOD−123 surface-mount compatibility, 500 mW power capability, AEC−Q101 qualification, and 20 Ω Zener impedance-making it optimal for volume automotive and industrial PCBs requiring zero rework and long-term supply stability.

Availability

MMSZ10T3G is available at Aetrix Electronics and suitable for automotive sensor references, industrial power rail clamping, and portable medical device biasing requiring stable component supply across multi-year production cycles.

Supply support for MMSZ10T3G 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 for automotive, industrial, cloud, medical, and IoT applications.

The MMSZxxxT3G series is part of onsemi's precision Zener voltage regulator product line, engineered for high-reliability, surface-mount voltage reference and transient suppression in space-constrained, thermally demanding environments.

FAQ

What is the Zener voltage tolerance of the MMSZ10T3G?

The MMSZ10T3G has a nominal Zener voltage of 10 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 9.50 V and 10.50 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 official onsemi datasheet (Rev. 13, June 2024). The MMSZ10T3G maintains this specification across its qualified temperature range.

Is the MMSZ10T3G suitable for automotive applications?

Yes, the MMSZ10T3G is AEC−Q101 qualified and PPAP capable, making it suitable for automotive applications including engine control units, body electronics, and ADAS sensor interfaces. Its −55°C to +150°C junction temperature range, 16 kV HBM ESD rating, and SOD−123 package designed for automated assembly meet stringent automotive reliability requirements. The MMSZ10T3G is explicitly listed in onsemi's qualified automotive-grade Zener series.

What is the maximum power dissipation of the MMSZ10T3G and how does it derate with temperature?

The MMSZ10T3G is rated for 500 mW total power dissipation on FR−5 board at lead temperature (T_L) = 75°C. Above 75°C, it derates linearly at 6.7 mW/°C, reaching zero dissipation at approximately 149°C. This derating behavior is defined in the Maximum Ratings table and validated via infrared scan method. Engineers must apply this curve when designing thermal pads or copper pours for the MMSZ10T3G in high-ambient environments.

Does the MMSZ10T3G have a Pb−Free package?

Yes, the "G" suffix in MMSZ10T3G indicates a Pb−Free, RoHS-compliant SOD−123 package. The device uses void-free, transfer-molded thermosetting plastic with corrosion-resistant, easily solderable finish. Lead-free reflow profiles per J-STD-020 are supported, and maximum soldering temperature is 260°C for 10 seconds. This packaging aligns with onsemi's global environmental compliance strategy and is documented in the Mechanical Characteristics section of the datasheet.

What is the Zener impedance (Z_ZT) of the MMSZ10T3G and why does it matter?

The MMSZ10T3G has a maximum Zener impedance (Z_ZT) of 20 Ω at I_ZT = 5 mA and f = 1 kHz. This parameter quantifies how tightly the device regulates voltage under changing current loads-lower Z_ZT means less output voltage variation. For example, a 1 mA change in Zener current causes only ~20 mV shift in regulated voltage. This stability is essential in precision reference and feedback applications where the MMSZ10T3G is deployed.

MMSZ10T3G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 10 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 20 Ohms

Current - Reverse Leakage @ Vr:: 200 nA @ 7 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

MMSZ10T3G FAQ

1.How can I place an order for MMSZ10T3G through Aetrix?

Please submit a Request for Quotation (RFQ) for MMSZ10T3G 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 MMSZ10T3G reliable?

The price and inventory of MMSZ10T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ10T3G is usually 5 days.

3.What payment methods are accepted for MMSZ10T3G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ10T3G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MMSZ10T3G?

MMSZ10T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MMSZ10T3G 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 MMSZ10T3G?

For technical support, including MMSZ10T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ10T3G requirements.

6.How does Aetrix verify that MMSZ10T3G is sourced from the original manufacturer or authorized distributors?

All MMSZ10T3G 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 MMSZ10T3G meets industry standards.

7.What is the process for return or replacement of MMSZ10T3G?

All MMSZ10T3G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ10T3G, 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 MMSZ10T3G part is unused and in its original packaging.

Return procedure for MMSZ10T3G:

1.Submit a request within 90 days.

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

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