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onsemi MMSZ4689ET1
- Part No.:
- MMSZ4689ET1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4689ET1.pdf
- Description:
- DIODE ZENER 5.1V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,968
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Product details
Overview
MMSZ4689ET1 from ON Semiconductor 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). It serves as a precision voltage reference or overvoltage clamp in low-power analog sensing and power rail stabilization circuits.
For engineers reviewing the MMSZ4689ET1 datasheet, pinout, applications, or equivalent options, key selection considerations include its 5.1 V nominal Zener voltage, 150 °C maximum junction temperature, AEC−Q101 qualification, Class 3 ESD rating (>16 kV HBM), and SOD−123 footprint compatibility with high-density PCB layouts.
Technical Context
The MMSZ4689ET1 operates as a two-terminal silicon Zener diode optimized for stable reverse-bias regulation at 5.1 V with tight tolerance (±5%) and low dynamic impedance (typically 17 Ω at IZT = 20 mA). Its thermal resistance is 150 °C/W (junction-to-lead) and 340 °C/W (junction-to-ambient), enabling reliable operation up to 150 °C junction temperature.
It features a cathode band marking, Pb-free construction, UL 94 V−0 flammability rating, and is qualified per AEC−Q101 for automotive applications. The device exhibits a positive temperature coefficient near 5.1 V (≈+2.0 mV/°C), confirmed in typical characteristics curves across −55°C to +150°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.85–5.36 V @ IZT = 50 mA; ensures stable 5.1 V reference under load with ±5% tolerance |
| Power Dissipation (PD) | 500 mW @ TL = 75°C; derates linearly above 75°C (6.7 mW/°C), supporting thermal design on standard FR−5 PCB |
| Peak Surge Power (Ppk) | 225 W @ 8 × 20 µs pulse; provides robust transient overvoltage protection without failure |
| Reverse Leakage (IR) | ≤10 µA @ VR = 3 V; minimizes quiescent current draw in battery-powered voltage monitor circuits |
| Dynamic Impedance (ZZT) | 17 Ω max @ IZT = 20 mA; maintains tight regulation under varying load conditions |
| ESD Rating | Class 3 (>16 kV) per Human Body Model; eliminates need for external ESD protection in handling-sensitive designs |
| Junction Temperature Range | −55°C to +150°C; supports operation in under-hood automotive and industrial ambient environments |
Pinout & Package
SOD−123 surface-mount plastic package (Case 425, Style 1), void-free thermosetting material, corrosion-resistant finish, UL 94 V−0 rated, 260°C soldering tolerance (10 s).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased during Zener operation; polarity band identifies terminal |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes bias path for Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, humidity, and mechanical stress testing |
| 500 mW Power Rating on FR−5 Board | Enables use in space-constrained consumer and industrial PCBs without heatsinking at moderate ambient temperatures |
| Small SOD−123 Footprint | 0.94–1.35 mm height, 2.54–2.84 mm length; supports >10,000 units/in² placement density in automated assembly |
| Class 3 ESD Protection | Withstands >16 kV HBM discharge without parameter shift or failure-reduces system-level ESD design overhead |
| Pb-Free Construction | Complies with RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow profile requirements |
Applications
| Automotive Sensor Reference | USB Port Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing excitation voltage for analog pressure or temperature sensors in engine control modules. IC Role / Device Role / Timing Role: Two-terminal Zener reference providing precise 5.1 V bias independent of supply ripple. Use Value: Maintains sensor accuracy within ±0.5% full-scale error despite 12 V battery fluctuations between 9–16 V. |
Use Scenario: Protecting USB data lines and VBUS from transient surges during hot-plug events. IC Role / Device Role / Timing Role: Fast-clamping Zener shunt limiting VBUS to ≤5.36 V during 8 × 20 µs ESD or load-dump spikes. Use Value: Absorbs 225 W surge energy without degradation, preserving USB PHY integrity per IEC 61000-4-2 Level 4. |
| Low-Power IoT Voltage Monitor | Industrial PLC Input Conditioning |
|
Use Scenario: Monitoring coin-cell battery voltage in BLE-enabled asset trackers to trigger low-battery alerts. IC Role / Device Role / Timing Role: Reverse-biased Zener used as threshold detector in comparator input stage. Use Value: Draws only ≤10 µA leakage at 3 V, extending 220 mAh CR2032 battery life beyond 5 years in sleep mode. |
Use Scenario: Clamping 24 V DC input signals to safe levels before feeding into microcontroller GPIOs. IC Role / Device Role / Timing Role: Standalone overvoltage protector placed ahead of optocoupler or ADC front-end. Use Value: Withstands repeated 100 V transients per IEC 61000-4-4, eliminating need for TVS arrays in cost-sensitive PLC designs. |
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-C5V1 | Same 5.1 V nominal Zener voltage, but SOT-23 package (larger footprint), 350 mW rating, no AEC−Q101 qualification | Not suitable for automotive under-hood use; limited surge capability (100 W peak) | Select when board space allows SOT-23 and automotive qualification is unnecessary |
| MMSZ5231B | 5.1 V Zener, same SOD−123 package, but 350 mW rating and no AEC−Q101 or Class 3 ESD rating | Lower power handling limits continuous regulation in warm environments; unqualified for automotive PPAP | Choose only for non-automotive, low-cost consumer applications where 500 mW headroom is not required |
Compared with BZX84-C5V1 and MMSZ5231B, the MMSZ4689ET1 delivers higher power margin (500 mW vs. 350 mW), certified automotive reliability, and superior ESD robustness-making it the preferred choice for safety-critical or thermally demanding deployments.
Availability
MMSZ4689ET1 is available at Aetrix Electronics and suitable for automotive sensor reference, USB port overvoltage clamp, and low-power IoT voltage monitor applications requiring stable component supply, long-term lifecycle support, and AEC−Q101 compliance.
Supply support for MMSZ4689ET1 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and cloud infrastructure markets.
The MMSZ4xxxET1G series was designed specifically for high-reliability, surface-mount Zener regulation in space-constrained and thermally demanding applications-including automotive ECUs, industrial controls, and portable electronics.
FAQ
What is the nominal Zener voltage and tolerance of the MMSZ4689ET1?
The MMSZ4689ET1 has a nominal Zener voltage of 5.1 V with a tolerance of ±5%, specified as 4.85 V minimum to 5.36 V maximum at test current IZT = 50 mA. This tight tolerance ensures consistent voltage reference performance across production lots and operating temperatures, critical for precision analog circuits using the MMSZ4689ET1.
Is the MMSZ4689ET1 qualified for automotive applications?
Yes, the MMSZ4689ET1 is AEC−Q101 qualified and PPAP capable, meeting the stress test requirements for automotive electronic components including temperature cycling, humidity, and mechanical shock. This qualification confirms the MMSZ4689ET1's suitability for under-hood and cabin applications where reliability under harsh environmental conditions is mandatory.
What is the maximum reverse leakage current for the MMSZ4689ET1?
The MMSZ4689ET1 specifies a maximum reverse leakage current (IR) of 10 µA at VR = 3 V and TA = 25°C. This low leakage enables efficient operation in battery-powered systems, such as those using the MMSZ4689ET1 for voltage monitoring or reference generation where standby current must be minimized.
Can the MMSZ4689ET1 handle transient surge events?
Yes, the MMSZ4689ET1 supports a peak nonrepetitive surge power of 225 W for an 8 × 20 µs waveform, as defined in Figure 11 of the datasheet. This capability allows the MMSZ4689ET1 to absorb common electrical transients-such as ESD or inductive switching spikes-without degradation, making it effective in clamping roles across multiple applications.
What is the package type and marking code for the MMSZ4689ET1?
The MMSZ4689ET1 uses the SOD−123 surface-mount package (Case 425, Style 1) with cathode indicated by a band. Its device marking is "CG8", visible on the top surface. This compact, Pb-free package supports automated assembly and meets UL 94 V−0 flammability standards, confirming the physical identity and manufacturability of the MMSZ4689ET1.
MMSZ4689ET1 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
MMSZ4689ET1 FAQ
1.How can I place an order for MMSZ4689ET1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4689ET1 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 MMSZ4689ET1 reliable?
The price and inventory of MMSZ4689ET1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4689ET1 is usually 5 days.
3.What payment methods are accepted for MMSZ4689ET1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4689ET1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4689ET1?
MMSZ4689ET1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4689ET1 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 MMSZ4689ET1?
For technical support, including MMSZ4689ET1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4689ET1 requirements.
6.How does Aetrix verify that MMSZ4689ET1 is sourced from the original manufacturer or authorized distributors?
All MMSZ4689ET1 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 MMSZ4689ET1 meets industry standards.
7.What is the process for return or replacement of MMSZ4689ET1?
All MMSZ4689ET1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4689ET1, 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 MMSZ4689ET1 part is unused and in its original packaging.
Return procedure for MMSZ4689ET1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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