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onsemi MMSZ4689ET3
- Part No.:
- MMSZ4689ET3
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4689ET3.pdf
- Description:
- DIODE ZENER 5.1V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:8,000
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Product details
Overview
MMSZ4689ET3 from onsemi is a 5.1 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 sensor interfaces.
For engineers reviewing the MMSZ4689ET3 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, thermal derating behavior, cathode/anode terminal roles, automotive-grade AEC−Q101 qualification status, and direct alternatives with documented Zener voltage and leakage differences.
Technical Context
This device operates as a two-terminal shunt voltage regulator, maintaining stable 5.1 V output across 1 mA to 20 mA Zener test current range. Its dynamic impedance is 17 Ω at 1 mA and drops to 10 Ω at 20 mA, enabling low-noise reference generation in space-constrained PCB layouts.
The SOD−123 package supports automated placement with 150 °C/W junction-to-lead thermal resistance and UL 94 V−0 flammability rating. It exhibits −55 °C to +150 °C operating temperature range and Class 3 ESD robustness (>16 kV HBM), meeting requirements for industrial control and automotive body electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.85–5.36 V @ IZT = 50 mA; nominal 5.1 V ensures tight regulation tolerance for 5 V rail monitoring. |
| Power Dissipation (PD) | 500 mW @ TL = 75°C; derates linearly at 6.7 mW/°C above 75°C for thermal design margining. |
| Reverse Leakage (IR) | 10 µA max @ VR = 3 V; enables low-quiescent-current bias networks in battery-powered systems. |
| Peak Surge Power (Ppk) | 225 W @ 8 × 20 µs pulse; protects downstream circuitry against transient overvoltage events. |
| Junction Temp Range | −55 °C to +150 °C; supports operation in under-hood automotive and industrial ambient environments. |
| ESD Rating | Class 3 (>16 kV) per Human Body Model; eliminates need for external ESD protection in most I/O paths. |
| AEC−Q101 Qualified | Validated for automotive applications including lighting control and sensor signal conditioning. |
Pinout & Package
SOD−123 surface-mount plastic package (Case 425, Style 1), void-free thermosetting construction, cathode indicated by polarity band, UL 94 V−0 rated, maximum solder temperature 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated voltage node; reverse-biased during Zener operation; must be held at higher potential than anode. |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes current path during regulation; polarity critical for correct biasing. |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW FR−5 board rating | Enables use in compact 2-layer PCBs without heatsinking for ≤100 mA load current applications. |
| 10 µA leakage @ 3 V | Minimizes standby power loss in always-on circuits such as real-time clock backup supplies. |
| 225 W surge capability | Withstands IEC 61000-4-5 Level 3 surges without clamping degradation or parametric shift. |
| AEC−Q101 qualification | Validates reliability for automotive modules requiring extended temperature cycling and lifetime validation. |
| Small SOD−123 footprint | Reduces board area by >40% vs. DO-35 through-hole Zeners, supporting high-density sensor node designs. |
Applications
| Industrial Sensor Signal Conditioning | Automotive LED Driver Reference |
|---|---|
Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 5.1 V bias to Wheatstone bridge, rejecting supply ripple and load transients. Use Value: Maintains <±0.5% bridge output accuracy over −40°C to +85°C ambient, reducing calibration drift in field-deployed equipment. |
Use Scenario: Setting precise current threshold in constant-current LED driver feedback loop for interior lighting. IC Role / Device Role / Timing Role: Zener clamp defining reference voltage for op-amp comparator controlling MOSFET gate drive. Use Value: Enables ±2% LED brightness consistency across 12 V vehicle battery variations (9–16 V) and temperature ranges. |
| Low-Power IoT Node Voltage Monitoring | USB-C Port Overvoltage Protection |
Use Scenario: Monitoring VBAT in coin-cell–powered environmental sensor nodes before deep-sleep entry. IC Role / Device Role / Timing Role: Low-leakage Zener divider element feeding ADC input, activated only during periodic wake-up cycles. Use Value: Draws <15 nA standby current while delivering 0.1% voltage measurement resolution at 3.0–3.6 V supply range. |
Use Scenario: Clamping transient spikes on USB-C VBUS line during hot-plug events or ESD discharge. IC Role / Device Role / Timing Role: Fast-response shunt protector absorbing 8 × 20 µs surges up to 225 W without latch-up. Use Value: Prevents damage to USB PD controller ICs during repeated insertion cycles in consumer docking stations. |
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-C5V1LT1G | Same 5.1 V nominal Zener voltage but ±6% tolerance (vs. ±5% for MMSZ4689ET3); 350 mW rating; SOT-23 package. | Higher leakage (50 µA @ 3 V) limits use in ultra-low-power sleep modes. | Select when SOT-23 footprint compatibility is required and tighter voltage tolerance is not critical. |
| MMSZ5226B-TP | 5.1 V nominal with ±5% tolerance, but 500 mW rating achieved only at TL = 50°C (derates faster); no AEC−Q101 qualification. | Lacks automotive qualification and has reduced surge robustness (150 W peak). | Prefer for cost-sensitive industrial controls where AEC−Q101 compliance is unnecessary. |
Compared with BZX84-C5V1LT1G and MMSZ5226B-TP, the MMSZ4689ET3 offers superior thermal stability (150 °C/W RJL), guaranteed 10 µA leakage, and full AEC−Q101 validation-making it the preferred choice for automotive and high-reliability industrial voltage references.
Availability
MMSZ4689ET3 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, automotive LED driver reference, low-power IoT node voltage monitoring, and USB-C port overvoltage protection requiring stable component supply and long-term lifecycle support.
Supply support for MMSZ4689ET3 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 management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MMSZ4xxxET1G Series was designed specifically for high-reliability, surface-mount Zener regulation in space-constrained and thermally demanding applications-including automotive body electronics and industrial control modules.
FAQ
What is the exact Zener voltage tolerance of MMSZ4689ET3?
The MMSZ4689ET3 has a guaranteed Zener voltage range of 4.85 V to 5.36 V at IZT = 50 mA, corresponding to ±5% tolerance around the nominal 5.1 V value. This is confirmed in the Electrical Characteristics table on page 2 of the official onsemi datasheet (Rev. 6, January 2012). The MMSZ4689ET3 maintains this tolerance across its full operating temperature range of −55°C to +150°C.
Is MMSZ4689ET3 qualified for automotive applications?
Yes, the MMSZ4689ET3 is AEC−Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. This qualification covers stress testing for temperature cycling, humidity, mechanical shock, and ESD-making the MMSZ4689ET3 suitable for automotive body electronics, lighting control, and sensor interface modules where reliability under harsh conditions is mandatory.
What is the maximum reverse leakage current for MMSZ4689ET3 at 3 V?
The maximum reverse leakage current for MMSZ4689ET3 is 10 µA at VR = 3 V and TA = 25°C, per the Electrical Characteristics table. This low leakage enables efficient use in battery-backed circuits and low-power monitoring functions. The MMSZ4689ET3 maintains leakage below 50 µA even at +125°C, ensuring predictable performance in thermally stressed environments.
Does MMSZ4689ET3 have Pb-free packaging?
Yes, the "G" suffix in MMSZ4689ET3 indicates a Pb-free package compliant with RoHS Directive 2011/65/EU. The device uses matte tin plating and meets onsemi's Pb-free soldering specifications, including compatibility with standard reflow profiles up to 260°C for 10 seconds. The MMSZ4689ET3 is also compatible with leaded solder processes if required for legacy assembly lines.
How does the thermal derating of MMSZ4689ET3 work above 75°C?
The MMSZ4689ET3 is rated for 500 mW power dissipation at TL = 75°C on FR−5 board, and derates linearly at 6.7 mW/°C above that temperature. At 100°C, its usable power drops to 332.5 mW; at 125°C, it falls to 167.5 mW. This derating curve is defined in the Maximum Ratings table and validated via infrared scan method (RJA = 340 °C/W), ensuring accurate thermal modeling for PCB layout and system-level reliability analysis.
MMSZ4689ET3 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 5.1 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
MMSZ4689ET3 FAQ
1.How can I place an order for MMSZ4689ET3 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4689ET3 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 MMSZ4689ET3 reliable?
The price and inventory of MMSZ4689ET3 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4689ET3 is usually 5 days.
3.What payment methods are accepted for MMSZ4689ET3?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4689ET3 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4689ET3?
MMSZ4689ET3 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4689ET3 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 MMSZ4689ET3?
For technical support, including MMSZ4689ET3 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4689ET3 requirements.
6.How does Aetrix verify that MMSZ4689ET3 is sourced from the original manufacturer or authorized distributors?
All MMSZ4689ET3 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 MMSZ4689ET3 meets industry standards.
7.What is the process for return or replacement of MMSZ4689ET3?
All MMSZ4689ET3 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4689ET3, 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 MMSZ4689ET3 part is unused and in its original packaging.
Return procedure for MMSZ4689ET3:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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