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onsemi SZMMSZ4690T3G
- Part No.:
- SZMMSZ4690T3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ4690T3G.pdf
- Description:
- DIODE ZENER 5.6V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:31,763
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Product details
Overview
SZMMSZ4690T3G from onsemi is a 5.6 V ±5% Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 50 µA test current (IZT), 10 µA reverse leakage at 4 V (IR), and −55°C to +150°C operating temperature range - used for precision voltage reference and overvoltage protection in automotive power management circuits.
For engineers reviewing the SZMMSZ4690T3G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, low IZT stability, AEC−Q101 qualification, thermal resistance (RJL = 150°C/W), and SOD−123 board-mount compatibility in space-constrained automotive ECUs.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable output voltage across variable load currents by conducting reverse breakdown current above its nominal Zener voltage of 5.6 V. Its low 50 µA IZT enables accurate regulation even under light-load conditions typical in sensor biasing and microcontroller reset circuits.
The SOD−123 package provides optimized thermal performance (RJL = 150°C/W) and automated assembly compatibility, while the −55°C to +150°C junction temperature range and AEC−Q101 qualification confirm suitability for under-hood automotive environments where thermal cycling and reliability are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.32–5.88 V @ IZT = 50 µA - ensures ±5% regulation accuracy for 5 V rail monitoring and clamping |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - supports continuous operation in thermally constrained PCB layouts |
| Junction-to-Lead Thermal Resistance (RJL) | 150°C/W - enables efficient heat transfer to PCB copper, critical for sustained 500 mW operation |
| Reverse Leakage Current (IR) | 10 µA @ VR = 4 V - minimizes standby power loss in battery-backed systems |
| Operating Temperature Range | −55°C to +150°C - validated for engine control units and transmission modules per AEC−Q101 |
| ESD Rating | Class 3 (>16 kV HBM) - protects against handling-induced electrostatic discharge during assembly |
Pinout & Package
SOD−123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with cathode polarity band marking; designed for high-density placement and reflow soldering at 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Zener breakdown terminal | Connected to regulated voltage node; reverse-biased to conduct when input exceeds 5.6 V |
| 2 (Anode) | Reference/ground terminal | Typically tied to system ground or low-impedance return path for stable regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 qualified | Validated for automotive applications including powertrain and body electronics |
| Pb−Free and RoHS compliant | Meets global environmental compliance requirements without lead-based solder compatibility issues |
| Low IZT (50 µA) | Enables precise voltage reference generation with minimal quiescent current draw |
| ESD robustness >16 kV HBM | Reduces risk of field failure due to electrostatic discharge during handling or operation |
Applications
| Engine Control Unit (ECU) Voltage Monitoring | Automotive Cabin Controller Reset Circuit |
|---|---|
Use Scenario: Monitoring 5 V supply integrity in engine control modules subject to load dump transients. IC Role / Device Role / Timing Role: Shunt regulator providing overvoltage clamping and stable reference for analog comparators. Use Value: Maintains 5.6 V clamp threshold with ±5% tolerance and <10 µA leakage, preventing false resets during voltage spikes. | Use Scenario: Generating clean reset signal for microcontrollers in HVAC and infotainment head units. IC Role / Device Role / Timing Role: Zener-based reset supervisor ensuring reliable power-on initialization after cold cranking. Use Value: Delivers stable 5.6 V reference with low thermal drift (TC ≈ +2 mV/°C near 5.6 V) across −40°C to +105°C ambient. |
| ADAS Camera Module Bias Supply | Electric Power Steering (EPS) Sensor Reference |
Use Scenario: Providing precision bias voltage for CMOS image sensor analog front-end circuitry. IC Role / Device Role / Timing Role: Low-noise voltage reference source for ADC reference and pixel bias networks. Use Value: Achieves <1 Ω dynamic impedance (ZZT) at 5 mA, minimizing noise coupling into sensitive imaging paths. | Use Scenario: Stabilizing excitation voltage for torque and position sensors in EPS motor control boards. IC Role / Device Role / Timing Role: Precision shunt regulator maintaining constant 5.6 V for Wheatstone bridge excitation. Use Value: Ensures <0.1% full-scale error contribution from reference drift over lifetime, meeting ASIL-B functional safety targets. |
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-C5V6LT1G | Same 5.6 V nominal Zener, but 350 mW rating and SOT−23 package; higher RJA (450°C/W) | Limited to lower-power consumer or industrial applications; not AEC−Q101 qualified | Select only if automotive qualification and 500 mW thermal margin are not required |
| MMSZ5232BT1G | 5.6 V Zener, 500 mW rating, but no AEC−Q101 qualification and higher IR (25 µA @ 4 V) | Suitable for non-automotive industrial controls; lacks PPAP capability and automotive traceability | Prefer for cost-sensitive non-automotive designs where extended temperature validation is unnecessary |
Compared with BZX84-C5V6LT1G and MMSZ5232BT1G, SZMMSZ4690T3G delivers superior thermal performance (RJL = 150°C/W), guaranteed automotive qualification (AEC−Q101 + PPAP), and lower leakage - making it the only choice for production-grade automotive voltage reference and clamping functions requiring long-term reliability under thermal stress.
Availability
SZMMSZ4690T3G is available at Aetrix Electronics and suitable for automotive ECU voltage monitoring, ADAS camera biasing, and electric power steering sensor reference applications requiring stable component supply, AEC−Q101 traceability, and 10,000-unit tape-and-reel packaging.
Supply support for SZMMSZ4690T3G 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 engineered specifically for automotive and industrial voltage regulation, combining AEC−Q101 reliability, low-leakage Zener performance, and SOD−123 thermal efficiency in a compact surface-mount package.
FAQ
What is the nominal Zener voltage and tolerance of SZMMSZ4690T3G?
The SZMMSZ4690T3G has a nominal Zener voltage of 5.6 V with a tolerance of ±5%, corresponding to a guaranteed range of 5.32 V to 5.88 V at IZT = 50 µA and TA = 25°C. This tight tolerance ensures predictable clamping behavior in automotive voltage supervision circuits where reference accuracy directly impacts system safety margins.
Is SZMMSZ4690T3G qualified for automotive applications?
Yes, SZMMSZ4690T3G is AEC−Q101 qualified and PPAP capable, with full traceability and process control aligned to automotive quality standards. The "SZ" prefix explicitly denotes devices manufactured under automotive-specific site and change control requirements, making SZMMSZ4690T3G suitable for production use in engine control, ADAS, and body electronics.
What is the maximum power dissipation and thermal derating behavior of SZMMSZ4690T3G?
SZMMSZ4690T3G is rated for 500 mW total power dissipation on FR−5 board at TL = 75°C, with linear derating of 6.7 mW/°C above that temperature. Its junction-to-lead thermal resistance (RJL) is 150°C/W, enabling effective heat conduction to PCB copper - critical for sustaining full-rated power in thermally dense automotive modules.
How does the reverse leakage current of SZMMSZ4690T3G compare to similar Zeners?
SZMMSZ4690T3G specifies only 10 µA maximum reverse leakage current (IR) at VR = 4 V and TA = 25°C - significantly lower than many competing 5.6 V Zeners (e.g., MMSZ5232BT1G at 25 µA). This low leakage reduces standby power loss in battery-critical automotive subsystems such as always-on domain controllers and telematics modules.
What package type and dimensions does SZMMSZ4690T3G use?
SZMMSZ4690T3G uses the SOD−123 surface-mount package (Case 425), measuring 1.60 mm × 2.69 mm × 1.16 mm. It features a cathode polarity band, Pb−free construction, and is rated for 260°C reflow soldering for 10 seconds - optimized for high-speed automated assembly and high-density PCB layouts in automotive electronics.
SZMMSZ4690T3G 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):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 4 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
SZMMSZ4690T3G FAQ
1.How can I place an order for SZMMSZ4690T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ4690T3G 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 SZMMSZ4690T3G reliable?
The price and inventory of SZMMSZ4690T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ4690T3G is usually 5 days.
3.What payment methods are accepted for SZMMSZ4690T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ4690T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ4690T3G?
SZMMSZ4690T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ4690T3G 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 SZMMSZ4690T3G?
For technical support, including SZMMSZ4690T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ4690T3G requirements.
6.How does Aetrix verify that SZMMSZ4690T3G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ4690T3G 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 SZMMSZ4690T3G meets industry standards.
7.What is the process for return or replacement of SZMMSZ4690T3G?
All SZMMSZ4690T3G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ4690T3G, 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 SZMMSZ4690T3G part is unused and in its original packaging.
Return procedure for SZMMSZ4690T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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