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onsemi MMSZ4694T3G
- Part No.:
- MMSZ4694T3G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4694T3G.pdf
- Description:
- DIODE ZENER 8.2V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:19,990
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Product details
Overview
MMSZ4694T3G 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. 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 MMSZ4694T3G datasheet, pinout, applications, or equivalent options, key selection criteria include its low IZT, tight VZ tolerance, ESD robustness (>16 kV HBM), and suitability for space-constrained voltage clamping in automotive sensor interfaces and industrial power monitoring.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal dynamic impedance (ZZT) of ~30 Ω at 1 mA, enabling stable regulation under light-load conditions. Its temperature coefficient is approximately +3.5 mV/°C near 8.2 V, supporting predictable drift compensation in reference designs.
The device uses a planar-diffused silicon junction in a void-free thermosetting plastic case, rated for 260°C soldering (10 s), UL 94 V−0 flammability, and Pb−free RoHS compliance. Cathode polarity is marked by a band on the SOD−123 body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.79–8.61 V @ IZT = 50 µA - defines clamping threshold with ±5% tolerance for reliable overvoltage protection |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - supports continuous operation in compact PCB layouts without forced cooling |
| Reverse Leakage (IR) | 1 µA @ VR = 6.2 V - ensures minimal standby current draw in battery-powered voltage monitor circuits |
| Junction Temp Range | −55°C to +150°C - enables deployment in under-hood automotive and industrial control environments |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling during automated assembly and field-level electrostatic events |
| Package | SOD−123 (1.60 × 2.69 × 1.16 mm) - fits high-density layouts and supports standard pick-and-place equipment |
Pinout & Package
SOD−123 surface-mount package with cathode indicated by a polarity band; 2-terminal configuration optimized for automated board assembly and thermal reliability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; accepts reverse bias for Zener conduction |
| 2 (Non-banded End) | Anode | Typically grounded or connected to lower potential rail; completes bias path |
Key Features
| Feature | Design Value |
|---|---|
| Low Test Current Operation | 50 µA IZT enables regulation in ultra-low-power sensor bias networks without loading source |
| High ESD Robustness | Class 3 (>16 kV HBM) eliminates need for external ESD protection in exposed I/O lines |
| Precision Voltage Clamping | ±5% VZ tolerance ensures repeatable trip points in overvoltage detection circuits |
| Automated Assembly Optimized | SOD−123 footprint and corrosion-resistant finish support high-yield reflow and wave soldering |
Applications
| Automotive Sensor Reference | Industrial Power Monitor |
|---|---|
Use Scenario: Providing stable 8.2 V reference for analog front-end of engine coolant temperature sensor. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise bias point for signal conditioning amplifier. Use Value: Maintains <±1% reference stability over −40°C to +125°C ambient, meeting AEC−Q101 requirements. |
Use Scenario: Clamping input to microcontroller ADC in 24 V DC industrial PLC analog input module. IC Role / Device Role / Timing Role: Overvoltage protection device limiting transient spikes to safe level before signal conditioning stage. Use Value: Absorbs 500 mW surge energy without degradation, preventing ADC saturation or latch-up during line transients. |
| Portable Medical Device Bias | IoT Node Voltage Supervisor |
Use Scenario: Generating clean 8.2 V supply for op-amp in handheld pulse oximeter analog signal chain. IC Role / Device Role / Timing Role: Low-current Zener regulator supplying reference voltage to instrumentation amplifier. Use Value: Draws only 1 µA leakage at 6.2 V, extending battery life in always-on wearable applications. |
Use Scenario: Monitoring 9 V battery voltage in smart meter communication module using comparator input. IC Role / Device Role / Timing Role: Precision voltage threshold detector defining low-battery warning trigger point. Use Value: Delivers ±5% trip accuracy across full temperature range, reducing false alarms in field-deployed units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C8V2 | Same 8.2 V nominal, but 350 mW PD rating and SOD-323 package (smaller footprint) | Lower power dissipation limits use in sustained overvoltage scenarios | Select when board area is constrained and peak clamping duty cycle is low |
| MMBZ5231BS | 8.2 V nominal, 300 mW PD, SOT-23 package, higher IR (5 µA @ 6.2 V) | Higher leakage reduces accuracy in high-impedance reference nodes | Choose for legacy SOT-23 compatibility where thermal margin exceeds 300 mW |
Compared with BZX584C8V2 and MMBZ5231BS, the MMSZ4694T3G offers superior thermal capability (500 mW), tighter leakage (1 µA), and AEC−Q101 qualification-making it preferred for automotive and industrial systems requiring long-term reliability under thermal stress.
Availability
MMSZ4694T3G is available at Aetrix Electronics and suitable for automotive sensor reference, industrial power monitoring, and portable medical device bias applications requiring stable component supply, consistent parametric performance, and traceable sourcing.
Supply support for MMSZ4694T3G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, and IoT applications.
The MMSZ4xxxT1G series was engineered specifically for high-reliability, low-power voltage regulation in space-constrained surface-mount designs-targeting automotive electronics, industrial controls, and portable instrumentation where precision, ESD resilience, and thermal stability are critical.
FAQ
What is the Zener voltage tolerance of MMSZ4694T3G?
The MMSZ4694T3G has a Zener voltage tolerance of ±5% at 50 µA test current, with a specified range of 7.79 V (min) to 8.61 V (max) at 25°C. This tolerance remains valid across the full operating temperature range of −55°C to +150°C, making MMSZ4694T3G suitable for precision reference applications where consistent clamping behavior is required.
Is MMSZ4694T3G qualified for automotive applications?
Yes, MMSZ4694T3G is AEC−Q101 qualified and PPAP capable, with an extended junction temperature range (−55°C to +150°C) and Class 3 ESD rating (>16 kV HBM). These attributes confirm its suitability for under-hood and chassis-mounted automotive subsystems, including sensor interfaces and power management modules where MMSZ4694T3G serves as a robust voltage clamp or reference element.
What is the maximum power dissipation of MMSZ4694T3G on FR-5 board?
MMSZ4694T3G is rated for 500 mW total power dissipation on FR-5 board at lead temperature (TL) of 75°C, with derating of 6.7 mW/°C above that temperature. This rating assumes use of the minimum recommended footprint per onsemi's datasheet, and enables MMSZ4694T3G to sustain regulated operation in thermally demanding environments without external heatsinking.
How does the leakage current of MMSZ4694T3G compare to similar Zeners?
MMSZ4694T3G exhibits only 1 µA reverse leakage current at 6.2 V (VR), significantly lower than many competing 8.2 V Zeners (e.g., MMBZ5231BS specifies 5 µA). This low IR minimizes error in high-impedance reference circuits and extends battery life in portable devices where MMSZ4694T3G is used for voltage supervision or bias generation.
What package type and dimensions does MMSZ4694T3G use?
MMSZ4694T3G uses the SOD−123 surface-mount package (Case 425), measuring 1.60 mm × 2.69 mm × 1.16 mm. The cathode is marked by a visible band on the body, and the package is Pb−free and RoHS compliant. This compact, thermally efficient form factor supports high-density PCB layouts and automated assembly processes where MMSZ4694T3G is deployed in volume production.
MMSZ4694T3G 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ4694T3G FAQ
1.How can I place an order for MMSZ4694T3G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4694T3G 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 MMSZ4694T3G reliable?
The price and inventory of MMSZ4694T3G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4694T3G is usually 5 days.
3.What payment methods are accepted for MMSZ4694T3G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4694T3G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4694T3G?
MMSZ4694T3G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4694T3G 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 MMSZ4694T3G?
For technical support, including MMSZ4694T3G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4694T3G requirements.
6.How does Aetrix verify that MMSZ4694T3G is sourced from the original manufacturer or authorized distributors?
All MMSZ4694T3G 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 MMSZ4694T3G meets industry standards.
7.What is the process for return or replacement of MMSZ4694T3G?
All MMSZ4694T3G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4694T3G, 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 MMSZ4694T3G part is unused and in its original packaging.
Return procedure for MMSZ4694T3G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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