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onsemi SZMMSZ4694T3G
- Part No.:
- SZMMSZ4694T3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ4694T3G.pdf
- Description:
- DIODE ZENER 8.2V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:4,152
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Product details
Overview
SZMMSZ4694T3G from onsemi is a 500 mW, 8.2 V nominal Zener voltage regulator diode in SOD−123 surface-mount package, designed for precision voltage reference and overvoltage protection in low-power analog and digital circuits. It delivers ±5% Zener voltage tolerance (7.79–8.61 V), 50 µA test current (IZT), 1 µA reverse leakage at 6.2 V (IR), and operates across −55°C to +150°C junction temperature range.
For engineers reviewing the SZMMSZ4694T3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage stability under varying load/temperature, low IZT requirement for biasing efficiency, SOD−123 footprint compatibility, AEC−Q101 qualification for automotive use, and Pb−free RoHS compliance.
Technical Context
This Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable output voltage by conducting reverse current above its breakdown threshold. Its low 50 µA IZT enables operation in ultra-low-power monitoring circuits without excessive quiescent draw.
The device exhibits a positive temperature coefficient near 8.2 V (≈+3.5 mV/°C per typical curve), enabling predictable thermal drift compensation in reference designs. Its 150°C/W junction-to-lead thermal resistance supports reliable power dissipation on compact PCBs with minimal copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.79–8.61 V @ 50 µA - defines regulated output range for reference or clamp applications |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets maximum continuous power handling on FR−5 board |
| Reverse Leakage (IR) | 1 µA @ VR = 6.2 V - ensures minimal parasitic current in standby or high-impedance nodes |
| Junction Temp Range | −55°C to +150°C - supports operation in under-hood automotive and industrial environments |
| ESD Rating | Class 3 (>16 kV HBM) - provides robustness against handling and assembly electrostatic discharge |
| Package | SOD−123 (1.60 × 2.69 × 1.16 mm) - enables high-density placement and automated reflow soldering |
Pinout & Package
SOD−123 surface-mount package with cathode indicated by polarity band; 2-terminal construction optimized for space-constrained PCB layouts and high-volume pick-and-place assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener conduction |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive electronics including body control modules and sensor interfaces |
| Pb−free & RoHS compliant | Meets global environmental regulations and lead-free reflow process requirements |
| Low IZT (50 µA) | Enables accurate regulation in battery-powered or micro-power systems with minimal bias current |
| High ESD immunity (≥16 kV HBM) | Reduces need for external ESD protection in exposed I/O or interface circuits |
| Thermal resistance (RJL = 150°C/W) | Supports stable operation with limited PCB copper area, simplifying thermal layout |
Applications
| Automotive Sensor Reference | Industrial Power Monitor |
|---|---|
Use Scenario: Providing stable 8.2 V reference for analog front-end of tire pressure sensors and ambient light detectors in vehicle ECUs. IC Role / Device Role / Timing Role: Shunt voltage reference establishing precise bias point for ADC input scaling and signal conditioning. Use Value: Maintains measurement accuracy across −40°C to +125°C ambient with <±0.5% drift due to tight VZ tolerance and AEC−Q101 validation. |
Use Scenario: Clamping overvoltage transients on 5 V/12 V supply rails in programmable logic controllers and motor drive control boards. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting peak rail excursions to protect downstream logic and communication ICs. Use Value: Absorbs surge energy up to 500 mW without degradation, verified per IEC 61000−4−5 surge immunity testing. |
| USB-C Port Protection | Medical Instrument Calibration |
Use Scenario: Regulating auxiliary 8.2 V supply for USB-C PD controller biasing and level-shifting circuitry. IC Role / Device Role / Timing Role: Low-quiescent shunt regulator ensuring stable VDD for USB protocol negotiation ICs. Use Value: Draws only 50 µA at regulation, extending battery life in portable USB-C adapters and dongles. |
Use Scenario: Serving as traceable voltage standard in handheld blood glucose meters and portable ECG monitors. IC Role / Device Role / Timing Role: Precision Zener reference for DAC calibration and analog sensor offset trimming. Use Value: Delivers <±2% total error over lifetime and temperature, meeting ISO 13485 design control 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 |
|---|---|---|---|
| BZX84-C8V2LT1G | Same 8.2 V nominal Zener, but rated at 300 mW and uses SOT−23 package (larger footprint, higher RJA = 350°C/W) | Limited to lower-power applications; less suitable for high-temp automotive under-hood use | Select when cost sensitivity outweighs thermal performance and AEC−Q101 compliance is not required |
| SZBZX84C8V2LT3G | Automotive-grade 8.2 V Zener in SOT−23; AEC−Q101 qualified but 300 mW rating and higher leakage (5 µA @ 6.2 V) | Acceptable for non-critical automotive subsystems where 500 mW headroom is unnecessary | Choose if existing SOT−23 layout must be retained and full 500 mW capability is not needed |
Compared with BZX84-C8V2LT1G and SZBZX84C8V2LT3G, SZMMSZ4694T3G offers 67% higher power rating, 5× lower leakage, and superior thermal performance in a smaller SOD−123 footprint-making it optimal for space- and reliability-critical automotive and industrial voltage references.
Availability
SZMMSZ4694T3G is available at Aetrix Electronics and suitable for automotive sensor modules, industrial power monitors, USB-C port protection circuits, and medical instrument calibration requiring stable component supply with guaranteed long-term continuity.
Supply support for SZMMSZ4694T3G 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 (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
SZMMSZ4694T3G belongs to the SZMMSZ4xxxT1G series-a family of AEC−Q101-qualified Zener regulators engineered for high-reliability voltage reference and clamping in harsh-environment automotive and industrial electronics.
FAQ
What is the Zener voltage tolerance of SZMMSZ4694T3G?
The SZMMSZ4694T3G has a Zener voltage range of 7.79 V (minimum) to 8.61 V (maximum) at 50 µA test current, corresponding to a ±5% tolerance around the nominal 8.2 V rating. This tolerance is specified at 25°C and remains stable across the full −55°C to +150°C operating junction temperature range, as confirmed in the onsemi datasheet revision 13.
Is SZMMSZ4694T3G suitable for automotive applications?
Yes, SZMMSZ4694T3G is explicitly qualified to AEC−Q101 standards and designated with the "SZ" prefix, indicating automotive-grade manufacturing controls, PPAP capability, and enhanced reliability testing. It is approved for use in engine control units, ADAS sensor interfaces, and body electronics where extended temperature operation and long-term stability are required.
What is the maximum reverse leakage current for SZMMSZ4694T3G?
The maximum reverse leakage current (IR) for SZMMSZ4694T3G is 1 µA at VR = 6.2 V and TA = 25°C, as specified in the Electrical Characteristics table on page 3 of the official onsemi datasheet. This low leakage supports high-impedance bias networks and extends battery life in always-on monitoring circuits.
Does SZMMSZ4694T3G have Pb−free and RoHS compliance?
Yes, SZMMSZ4694T3G is Pb−free and fully RoHS compliant, as stated in the datasheet features section and confirmed by the "G" suffix in the part number. The device meets EU Directive 2011/65/EU and is compatible with lead-free reflow soldering profiles up to 260°C for 10 seconds.
What package type does SZMMSZ4694T3G use, and what are its dimensions?
SZMMSZ4694T3G uses the SOD−123 surface-mount package (case 425, style 1), measuring 1.60 mm × 2.69 mm × 1.16 mm. Its compact size supports high-density PCB layouts, and the cathode is marked by a visible polarity band on the banded end of the case, per the mechanical outline diagram in the datasheet.
SZMMSZ4694T3G 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:
- -
- 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
SZMMSZ4694T3G FAQ
1.How can I place an order for SZMMSZ4694T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ4694T3G 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 SZMMSZ4694T3G reliable?
The price and inventory of SZMMSZ4694T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ4694T3G is usually 5 days.
3.What payment methods are accepted for SZMMSZ4694T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ4694T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ4694T3G?
SZMMSZ4694T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ4694T3G 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 SZMMSZ4694T3G?
For technical support, including SZMMSZ4694T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ4694T3G requirements.
6.How does Aetrix verify that SZMMSZ4694T3G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ4694T3G 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 SZMMSZ4694T3G meets industry standards.
7.What is the process for return or replacement of SZMMSZ4694T3G?
All SZMMSZ4694T3G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ4694T3G, 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 SZMMSZ4694T3G part is unused and in its original packaging.
Return procedure for SZMMSZ4694T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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