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

onsemi SZMMSZ5V6T1G

Name: SZMMSZ5V6T1G
Brand: onsemi
SKU: SZMMSZ5V6T1G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SZMMSZ5V6T1G

Manufacturer:: onsemi

Category:: Single Zener Diodes

Package:: SOD-123

Datasheet:: SZMMSZ5V6T1G.pdf

Description:: DIODE ZENER 5.6V 500MW SOD123

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Inventory:16,696

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Product details

Overview

SZMMSZ5V6T1G from onsemi is a 5.6 V ±5% Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at 75°C, with 40 Ω dynamic impedance at 5 mA test current and 1 μA reverse leakage at 4.8 V, used for precision voltage reference and overvoltage protection in automotive power rails.

For engineers reviewing the SZMMSZ5V6T1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal resistance (R_JA = 340°C/W), ESD rating (>16 kV HBM), AEC−Q101 qualification, and SOD−123 board-mount compatibility.

Technical Context

This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across varying load currents via controlled reverse breakdown. Its 5.6 V nominal Zener voltage exhibits near-zero temperature coefficient (~0.5 mV/°C) in this range, enabling stable reference performance over −55°C to +150°C junction temperature.

The SOD−123 package supports automated assembly and delivers 150°C/W junction-to-lead thermal resistance. It features cathode polarity marking, Pb−free construction, UL 94 V−0 flammability rating, and 260°C soldering tolerance for 10 seconds.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	5.32–5.88 V at I_ZT = 5 mA; ±5% tolerance ensures predictable clamping level in regulation circuits.
Dynamic Impedance (Z_ZT)	40 Ω max at I_ZT = 5 mA; low impedance maintains tight voltage regulation under load transients.
Power Dissipation (P_D)	500 mW on FR−5 board at T_L = 75°C; derates linearly above 75°C (6.7 mW/°C).
Reverse Leakage (I_R)	1 μA max at V_R = 4.8 V; minimal quiescent current preserves efficiency in battery-sensitive designs.
Junction Temperature Range	−55°C to +150°C; enables operation in under-hood automotive and industrial environments.
ESD Rating	Class 3 (>16 kV) per Human Body Model; robust handling during PCB assembly and field service.

Pinout & Package

SOD−123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish; cathode indicated by polarity band.

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

Key Features

Feature	Design Value
AEC−Q101 Qualified	Validated for automotive applications including engine control units and body electronics.
Pb−Free Construction	Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profiles.
Optimized for Automated Assembly	Small footprint and standardized marking support high-speed pick-and-place placement accuracy.
High-Density Packaging	1.60 mm width enables routing in space-constrained PCB layouts such as ADAS sensor modules.

Applications

Automotive Power Rail Protection	Industrial Sensor Reference
Use Scenario: Clamping transient spikes on 5 V microcontroller supply lines in vehicle infotainment systems. IC Role / Device Role / Timing Role: Shunt regulator providing overvoltage protection and stable bias reference. Use Value: Prevents MCU reset or latch-up during load-dump events while maintaining <1 μA standby current.	Use Scenario: Providing precise 5.6 V reference for analog front-end of temperature and pressure sensors. IC Role / Device Role / Timing Role: Voltage reference source with low dynamic impedance for ADC excitation. Use Value: Enables ≤0.5% full-scale error in 12-bit sensor measurements across −40°C to +125°C ambient.
Consumer USB Port Regulation	Medical Diagnostic Power Monitoring
Use Scenario: Regulating auxiliary 5 V rail in portable ultrasound chargers subject to variable input conditions. IC Role / Device Role / Timing Role: Low-power Zener clamp stabilizing LDO input under brown-out conditions. Use Value: Maintains system uptime during AC adapter dropout without increasing BOM count or board area.	Use Scenario: Monitoring isolated 5 V DC-DC converter output in patient-worn ECG monitors. IC Role / Device Role / Timing Role: Precision voltage threshold detector for power health alerting. Use Value: Triggers fault reporting within 10 ms of >±3% output deviation, meeting IEC 60601-1 safety timing requirements.

Automotive Power Rail Protection

Industrial Sensor Reference

Use Scenario: Clamping transient spikes on 5 V microcontroller supply lines in vehicle infotainment systems.

IC Role / Device Role / Timing Role: Shunt regulator providing overvoltage protection and stable bias reference.

Use Value: Prevents MCU reset or latch-up during load-dump events while maintaining <1 μA standby current.

Use Scenario: Providing precise 5.6 V reference for analog front-end of temperature and pressure sensors.

IC Role / Device Role / Timing Role: Voltage reference source with low dynamic impedance for ADC excitation.

Use Value: Enables ≤0.5% full-scale error in 12-bit sensor measurements across −40°C to +125°C ambient.

Consumer USB Port Regulation

Medical Diagnostic Power Monitoring

Use Scenario: Regulating auxiliary 5 V rail in portable ultrasound chargers subject to variable input conditions.

IC Role / Device Role / Timing Role: Low-power Zener clamp stabilizing LDO input under brown-out conditions.

Use Value: Maintains system uptime during AC adapter dropout without increasing BOM count or board area.

Use Scenario: Monitoring isolated 5 V DC-DC converter output in patient-worn ECG monitors.

IC Role / Device Role / Timing Role: Precision voltage threshold detector for power health alerting.

Use Value: Triggers fault reporting within 10 ms of >±3% output deviation, meeting IEC 60601-1 safety timing requirements.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX584-C5V6	Same 5.6 V ±5% Zener voltage, but SOD-323 package (1.3 × 1.7 mm); R_JA = 420°C/W; 300 mW rating.	Lower power handling and higher thermal resistance limit use in sustained 5 mA regulation scenarios.	Select when board space is critical and average power dissipation remains below 200 mW.
MMSZ5V6ET1G	Same SOD−123 package and 5.6 V rating, but tighter ±2% tolerance and 30 Ω Z_ZT; not AEC−Q101 qualified.	Lacks automotive qualification and has reduced ESD rating (Class 2, >8 kV), limiting deployment in harsh environments.	Prefer for cost-sensitive consumer applications requiring tighter voltage accuracy without automotive compliance.

Compared with BZX584-C5V6 and MMSZ5V6ET1G, SZMMSZ5V6T1G uniquely combines AEC−Q101 qualification, 500 mW power capability, and SOD−123 manufacturability-making it the only option validated for under-hood automotive voltage reference and protection functions.

Availability

SZMMSZ5V6T1G is available at Aetrix Electronics and suitable for automotive power management, industrial sensor signal conditioning, and medical diagnostic equipment requiring stable component supply and long-term lifecycle continuity.

Supply support for SZMMSZ5V6T1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications.

The MMSZ/SZMMSZ series was designed specifically for high-reliability, surface-mount Zener regulation in space-constrained and thermally demanding environments-including automotive ECUs and industrial PLC I/O modules.

FAQ

What is the Zener voltage tolerance of SZMMSZ5V6T1G?

The SZMMSZ5V6T1G has a nominal Zener voltage of 5.6 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 5.32 V and 5.88 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 SZMMSZ5V6T1G maintains this specification across its qualified operating temperature range.

Is SZMMSZ5V6T1G qualified for automotive applications?

Yes, SZMMSZ5V6T1G is AEC−Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and control change requirements. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD (>16 kV HBM), making SZMMSZ5V6T1G suitable for use in engine control units, body electronics, and ADAS subsystems.

What is the maximum power dissipation for SZMMSZ5V6T1G on FR-5 board?

SZMMSZ5V6T1G 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 148°C. This rating assumes proper PCB copper area and thermal relief design per onsemi's recommended layout guidelines. The thermal resistance from junction-to-ambient (R_JA) is 340°C/W, measured via infrared scan method.

Does SZMMSZ5V6T1G have a specified temperature coefficient?

Yes, the SZMMSZ5V6T1G exhibits a typical temperature coefficient of approximately +0.5 mV/°C near its 5.6 V Zener voltage, as shown in Figure 1 ("Temperature Coefficients") of the onsemi datasheet. This near-zero TC minimizes voltage drift over temperature and makes SZMMSZ5V6T1G well-suited for precision reference applications where stability across −55°C to +150°C is required.

What packaging and marking format does SZMMSZ5V6T1G use?

SZMMSZ5V6T1G is supplied in Pb−free SOD−123 package (Case 425, Style 1), with tape-and-reel packaging (3,000 units per reel). Its marking consists of "U5" followed by a date code (e.g., "U5M"), where "U5" identifies the 5.6 V variant and "M" indicates manufacturing month/year. The cathode is marked by a band on terminal 1, consistent with the mechanical outline on page 6 of the datasheet.

SZMMSZ5V6T1G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: -

Package/Case:: SOD-123

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 5.6 V

Tolerance:: ±5%

Power - Max:: 500 mW

Impedance (Max) (Zzt):: 40 Ohms

Current - Reverse Leakage @ Vr:: 1 µA @ 2 V

Voltage - Forward (Vf) (Max) @ If:: 900 mV @ 10 mA

Operating Temperature:: -55°C ~ 150°C

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123

SZMMSZ5V6T1G FAQ

1.How can I place an order for SZMMSZ5V6T1G through Aetrix?

Please submit a Request for Quotation (RFQ) for SZMMSZ5V6T1G 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 SZMMSZ5V6T1G reliable?

The price and inventory of SZMMSZ5V6T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5V6T1G is usually 5 days.

3.What payment methods are accepted for SZMMSZ5V6T1G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5V6T1G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SZMMSZ5V6T1G?

SZMMSZ5V6T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SZMMSZ5V6T1G 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 SZMMSZ5V6T1G?

For technical support, including SZMMSZ5V6T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5V6T1G requirements.

6.How does Aetrix verify that SZMMSZ5V6T1G is sourced from the original manufacturer or authorized distributors?

All SZMMSZ5V6T1G 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 SZMMSZ5V6T1G meets industry standards.

7.What is the process for return or replacement of SZMMSZ5V6T1G?

All SZMMSZ5V6T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5V6T1G, 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 SZMMSZ5V6T1G part is unused and in its original packaging.

Return procedure for SZMMSZ5V6T1G:

1.Submit a request within 90 days.

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

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