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onsemi MMSZ4688ET3
- Part No.:
- MMSZ4688ET3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4688ET3.pdf
- Description:
- DIODE ZENER 4.7V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:7,732
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Product details
Overview
MMSZ4688ET3 from onsemi is a 4.7 V ±5% Zener voltage regulator diode in SOD−123 package, rated for 500 mW power dissipation at 75°C on FR−5 board, with 10 µA reverse leakage at 3 V and 225 W peak surge capability (8 × 20 µs), used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMSZ4688ET3 datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage tolerance, thermal derating behavior, ESD robustness (Class 3, >16 kV HBM), and AEC−Q101 qualification status for automotive-grade reliability.
Technical Context
This device operates as a two-terminal silicon Zener diode with cathode-anode polarity, designed for stable reverse-biased voltage regulation under DC or low-frequency transient conditions. Its 4.7 V nominal Zener voltage exhibits a temperature coefficient near 0 mV/°C, minimizing drift across −55°C to +150°C junction range.
The SOD−123 package enables automated placement and reflow soldering with 260°C/10 s maximum solder temperature. Thermal resistance is 340°C/W (junction-to-ambient) and 150°C/W (junction-to-lead), supporting predictable power derating above 75°C ambient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.47–4.94 V @ IZT = 50 mA - defines tight regulation window for 4.7 V reference applications |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets maximum continuous DC power handling on standard PCB |
| Peak Surge Power (Ppk) | 225 W @ 8 × 20 µs pulse - supports transient overvoltage clamping without failure |
| Reverse Leakage (IR) | 10 µA @ VR = 3 V - ensures minimal quiescent current draw in standby bias networks |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling during board assembly and field operation |
| Junction Temp Range | −55°C to +150°C - enables deployment in under-hood automotive and industrial environments |
Pinout & Package
SOD−123 surface-mount plastic package (Case 425, Style 1), void-free thermosetting body with corrosion-resistant finish; cathode indicated by band; 260°C max solder temperature for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal during Zener operation |
| 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 electronics per stress test requirements, enabling use in qualified ECUs |
| Pb−Free Construction | RoHS-compliant SOD−123 package with no lead content, meeting global environmental directives |
| Optimized for Automated Assembly | Package geometry and solderability support high-yield pick-and-place and reflow processes |
| High-Density Footprint | Small 2.84 mm × 1.35 mm outline allows placement in space-constrained PCB layouts |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 4.7 V reference for microcontroller ADC inputs monitoring battery voltage and cabin sensors. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and regulate reference rail. Use Value: Maintains <±1% reference accuracy across temperature and load, critical for 12-bit sensor digitization. |
Use Scenario: Biasing op-amp input stages in 4–20 mA transmitter circuits requiring precise threshold detection. IC Role / Device Role / Timing Role: Two-terminal voltage reference establishing fixed common-mode level for differential amplifiers. Use Value: Enables <0.5% full-scale error budget in loop-powered transmitters with wide ambient range. |
| Consumer Audio Power Supply Clamp | Medical Wearable Low-Power Reference |
Use Scenario: Protecting audio codec ICs from supply rail overshoot during hot-plug events in portable speakers. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing short-duration surges on 5 V rail. Use Value: Withstands 225 W pulses without degradation, preserving signal integrity during USB-C insertion. |
Use Scenario: Generating ultra-low-quiescent reference for ECG front-end amplifiers in battery-operated patches. IC Role / Device Role / Timing Role: Precision Zener providing stable bias point for instrumentation amplifier gain-setting network. Use Value: 10 µA leakage at 3 V ensures >10-year battery life in always-on sensing mode. |
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-C4V7 | Same 4.7 V nominal Zener, but SOT-23 package (larger footprint, higher RJA = 375°C/W) | Lower surge rating (100 W), not AEC−Q101 qualified | Preferred where board space permits and automotive qualification is unnecessary |
| MMSZ4688ET1G | Identical electrical specs and SOD−123 package; differs only in reel quantity (3,000 vs. 10,000 units) | No functional difference; same thermal, ESD, and reliability performance | Select MMSZ4688ET1G for prototyping or low-volume builds; MMSZ4688ET3 for production ramp |
Compared with BZX84-C4V7 and MMSZ4688ET1G, the MMSZ4688ET3 delivers identical regulation performance with automotive-grade qualification and optimized high-volume tape-and-reel logistics, making it the preferred choice for Tier 1 automotive suppliers and volume industrial OEMs.
Availability
MMSZ4688ET3 is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, consumer audio surge protection, and medical wearable reference circuits requiring stable component supply with guaranteed long-term sourcing.
Supply support for MMSZ4688ET3 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, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMSZ4xxxETxG series was developed to deliver AEC−Q101-qualified, high-reliability Zener regulators in compact SOD−123 packages for automotive infotainment, ADAS subsystems, and industrial control applications.
FAQ
What is the nominal Zener voltage of the MMSZ4688ET3 and its tolerance?
The MMSZ4688ET3 has a nominal Zener voltage of 4.7 V with a tolerance of ±5%, corresponding to a minimum of 4.47 V and maximum of 4.94 V when tested at IZT = 50 mA and TA = 25°C. This tight tolerance ensures consistent voltage reference performance across production lots and operating conditions, directly supporting precision analog designs that rely on the MMSZ4688ET3 for stable biasing.
Is the MMSZ4688ET3 qualified for automotive applications?
Yes, the MMSZ4688ET3 is AEC−Q101 qualified and PPAP capable, confirming its suitability for automotive electronic control units including body control modules and sensor interfaces. The MMSZ4688ET3 meets rigorous stress testing requirements for temperature cycling, humidity, and mechanical shock, making it appropriate for under-hood and cabin applications where reliability is mandated by OEM specifications.
What is the maximum power dissipation of the MMSZ4688ET3 on a standard PCB?
The MMSZ4688ET3 is rated for 500 mW total power dissipation on an FR−5 board at a lead temperature (TL) of 75°C, with linear derating of 6.7 mW/°C above that temperature. This specification reflects real-world thermal performance on typical 3.5 × 1.5 inch test boards using the recommended SOD−123 footprint, ensuring safe continuous operation of the MMSZ4688ET3 in thermally constrained designs.
Does the MMSZ4688ET3 have ESD protection, and what level is specified?
The MMSZ4688ET3 features Class 3 human body model (HBM) ESD protection with a rating exceeding 16 kV, verified per ANSI/ESDA/JEDEC JS-001. This high ESD robustness enables reliable handling during automated assembly and field service without additional protection circuitry, a key advantage of the MMSZ4688ET3 in high-mix manufacturing environments.
How does the MMSZ4688ET3 differ from the MMSZ4688ET1G variant?
The MMSZ4688ET3 and MMSZ4688ET1G share identical electrical, thermal, and mechanical specifications - including Zener voltage, power rating, SOD−123 package, and AEC−Q101 qualification - differing only in packaging configuration: MMSZ4688ET3 ships in 10,000-unit tape-and-reel format, while MMSZ4688ET1G uses 3,000-unit reels. Both versions contain the same die and perform identically as MMSZ4688ET3 in circuit operation.
MMSZ4688ET3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 10 µA @ 3 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
MMSZ4688ET3 FAQ
1.How can I place an order for MMSZ4688ET3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4688ET3 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 MMSZ4688ET3 reliable?
The price and inventory of MMSZ4688ET3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4688ET3 is usually 5 days.
3.What payment methods are accepted for MMSZ4688ET3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4688ET3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4688ET3?
MMSZ4688ET3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4688ET3 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 MMSZ4688ET3?
For technical support, including MMSZ4688ET3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4688ET3 requirements.
6.How does Aetrix verify that MMSZ4688ET3 is sourced from the original manufacturer or authorized distributors?
All MMSZ4688ET3 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 MMSZ4688ET3 meets industry standards.
7.What is the process for return or replacement of MMSZ4688ET3?
All MMSZ4688ET3 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4688ET3, 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 MMSZ4688ET3 part is unused and in its original packaging.
Return procedure for MMSZ4688ET3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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