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onsemi SZMMSZ4694T1G
- Part No.:
- SZMMSZ4694T1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ4694T1G.pdf
- Description:
- DIODE ZENER 8.2V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:11,918
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Product details
Overview
SZMMSZ4694T1G from onsemi is a 500 mW, 8.2 V nominal Zener voltage regulator diode in SOD−123 package, designed for precision voltage reference and overvoltage protection in low-power analog circuits, power supply feedback paths, and sensor biasing networks.
For engineers reviewing the SZMMSZ4694T1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 50 µA test current (IZT), 1 µA leakage at 6.2 V (IR), ±5% Zener voltage tolerance, −55°C to +150°C operating range, and AEC−Q101 qualification for automotive use.
Technical Context
This device operates as a two-terminal, silicon planar Zener diode with sharp reverse breakdown characteristics at 8.2 V nominal, optimized for stable regulation under low-current conditions (IZT = 50 µA). Its thermal resistance (RJL = 150 °C/W) supports reliable operation up to 150°C junction temperature.
The SOD−123 package enables automated placement and reflow soldering, while the cathode band marking and Pb−free construction comply with RoHS and automotive PPAP requirements. ESD rating exceeds 16 kV (HBM Class 3), ensuring robustness in handling and board assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.79–8.61 V @ IZT = 50 µA - defines tight regulation window for 8.2 V nominal reference |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75°C - sets maximum continuous power handling before thermal derating |
| Reverse Leakage (IR) | 1 µA @ VR = 6.2 V - ensures minimal error current in high-impedance reference nodes |
| Junction Temp Range | −55°C to +150°C - enables deployment in under-hood automotive and industrial environments |
| ESD Rating | Class 3 (>16 kV HBM) - protects against electrostatic damage during PCB handling and assembly |
| AEC−Q101 Qualified | Yes - confirms reliability validation for automotive electronics applications per stress test standard |
Pinout & Package
Package: SOD−123 surface-mount plastic case (1.60 × 2.69 × 1.16 mm), void-free thermosetting material, cathode indicated by polarity band, UL 94 V−0 flammability rating.
| 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 |
|---|---|
| Low IZT operation | 50 µA test current enables stable regulation in ultra-low-power sensor and battery-monitoring circuits |
| Automated assembly optimized | SOD−123 footprint and lead geometry support high-yield pick-and-place and reflow processes |
| High-temperature capability | 150°C max junction temperature allows use in engine control units and power converters without derating |
| Pb−free & RoHS compliant | Meets global environmental directives and simplifies compliance documentation for export products |
Applications
| Automotive Sensor Biasing | Industrial Power Supply Feedback |
|---|---|
Use Scenario: Providing stable 8.2 V reference for analog front-end circuitry in engine coolant temperature sensors. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt voltage reference in op-amp input stage. Use Value: Tight 8.2 V tolerance and low 1 µA leakage minimize measurement drift across −40°C to +125°C ambient. |
Use Scenario: Setting feedback threshold in isolated flyback converter secondary-side regulation loop. IC Role / Device Role / Timing Role: Shunt regulator defining optocoupler LED drive voltage to maintain output voltage accuracy. Use Value: 500 mW power rating and 150°C junction limit ensure long-term stability under transient load conditions. |
| Portable Medical Device Reference | IoT Node Overvoltage Protection |
Use Scenario: Generating calibrated bias for photodiode amplifier in handheld pulse oximeter. IC Role / Device Role / Timing Role: Low-noise Zener reference replacing higher-power alternatives to extend battery life. Use Value: 50 µA IZT and 1 µA IR reduce quiescent current draw while maintaining <±1% reference accuracy. |
Use Scenario: Clamping input voltage spikes on 3.3 V MCU GPIO lines exposed to external connectors. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting surge energy before reaching sensitive digital inputs. Use Value: 16 kV HBM ESD rating and fast Zener response protect against human-body discharge events without external TVS. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ4694T1G | No SZ prefix; not AEC−Q101 qualified; same electrical specs and SOD−123 package | Intended for commercial/industrial use only; lacks automotive change control and PPAP documentation | Select when AEC−Q101 compliance is not required and cost sensitivity is higher |
| BZX84-C8V2LT1G | Higher IZT = 5 mA; wider VZ tolerance (±5% vs ±5%); 350 mW PD; SOT−23 package | Requires different PCB footprint; less suitable for ultra-low-current biasing due to higher test current | Choose when existing SOT−23 layout exists and higher power margin is acceptable |
Compared with MMSZ4694T1G and BZX84-C8V2LT1G, SZMMSZ4694T1G uniquely combines AEC−Q101 qualification, 50 µA low-current regulation, and SOD−123 compactness-making it optimal for space-constrained automotive modules requiring traceable reliability data.
Availability
SZMMSZ4694T1G is available at Aetrix Electronics and suitable for automotive sensor systems, industrial power supplies, portable medical devices, and IoT edge nodes requiring stable component supply with full lifecycle traceability and automotive-grade reliability assurance.
Supply support for SZMMSZ4694T1G 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 MMSZ4xxxT1G/SZMMSZ4xxxT1G series was developed to provide AEC−Q101-qualified, low-power Zener regulators in miniature SOD−123 packages for next-generation automotive electronics and high-density portable systems.
FAQ
What is the nominal Zener voltage of SZMMSZ4694T1G and its tolerance?
The nominal Zener voltage of SZMMSZ4694T1G is 8.2 V, with a guaranteed range of 7.79 V to 8.61 V at IZT = 50 µA. This ±5% tolerance ensures predictable regulation performance in precision reference designs without requiring post-manufacturing trimming.
Is SZMMSZ4694T1G suitable for automotive applications?
Yes, SZMMSZ4694T1G is AEC−Q101 qualified and PPAP capable, with full change control documentation and site-specific manufacturing traceability. It meets automotive reliability standards for under-hood and cabin electronics, including extended temperature operation up to +150°C junction temperature.
What is the maximum reverse leakage current for SZMMSZ4694T1G and at what voltage is it specified?
The maximum reverse leakage current for SZMMSZ4694T1G is 1 µA, measured at VR = 6.2 V. This low leakage supports high-impedance reference nodes in battery-powered systems where standby current must be minimized without sacrificing voltage accuracy.
Does SZMMSZ4694T1G have Pb−free and RoHS compliance?
Yes, SZMMSZ4694T1G is Pb−free and fully RoHS compliant, as confirmed in the official onsemi datasheet. The "G" suffix denotes Pb−free packaging, and the device meets EU Directive 2011/65/EU requirements for hazardous substance restrictions.
What is the thermal resistance from junction to lead (RJL) for SZMMSZ4694T1G?
The thermal resistance from junction to lead (RJL) for SZMMSZ4694T1G is 150 °C/W, measured per infrared scan method. This value enables accurate thermal modeling when mounted on standard FR−5 PCBs and informs safe power derating above 75°C lead temperature.
SZMMSZ4694T1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 1 µA @ 6.2 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
SZMMSZ4694T1G FAQ
1.How can I place an order for SZMMSZ4694T1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ4694T1G 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 SZMMSZ4694T1G reliable?
The price and inventory of SZMMSZ4694T1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ4694T1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ4694T1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ4694T1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ4694T1G?
SZMMSZ4694T1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ4694T1G 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 SZMMSZ4694T1G?
For technical support, including SZMMSZ4694T1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ4694T1G requirements.
6.How does Aetrix verify that SZMMSZ4694T1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ4694T1G 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 SZMMSZ4694T1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ4694T1G?
All SZMMSZ4694T1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ4694T1G, 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 SZMMSZ4694T1G part is unused and in its original packaging.
Return procedure for SZMMSZ4694T1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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