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onsemi MMSZ4680ET1G
- Part No.:
- MMSZ4680ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ4680ET1G.pdf
- Description:
- DIODE ZENER 2.2V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:13,598
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Product details
Overview
MMSZ4680ET1G from onsemi is a 2.2 V nominal Zener voltage regulator diode in SOD−123 surface-mount package, rated for 500 mW power dissipation at 75°C on FR−5 board, with 225 W peak surge capability (8 × 20 µs), ±5% Zener voltage tolerance (2.09–2.31 V @ IZT = 50 mA), and ESD rating >16 kV (HBM Class 3). It serves as a precision low-voltage reference or overvoltage clamp in power supply feedback paths and sensor biasing circuits.
For engineers reviewing the MMSZ4680ET1G datasheet, pinout, applications, or equivalent options, key selection criteria include its 2.2 V nominal Zener voltage, tight 5% tolerance, low dynamic impedance (~20 Ω @ IZ = 20 mA), −55°C to +150°C operating range, and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
The MMSZ4680ET1G operates as a silicon planar Zener diode optimized for stable reverse-bias regulation at low voltages. Its junction design delivers low temperature coefficient (≈−3.5 mV/°C near 2.2 V) and minimal voltage drift across −55°C to +150°C, enabling use in thermally demanding environments without external compensation.
It exhibits 1 µA maximum reverse leakage current at VR = 1 V and maintains forward voltage ≤0.95 V at IF = 10 mA. The device's 150 °C/W junction-to-lead thermal resistance supports efficient heat transfer in compact PCB layouts, while its SOD−123 footprint enables high-density placement on automated assembly lines.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.09–2.31 V @ IZT = 50 mA - defines precise clamping threshold for low-voltage rail protection and reference generation. |
| Power Dissipation (PD) | 500 mW @ TL = 75°C - sets continuous DC power handling limit on standard FR−5 PCB with minimum footprint. |
| Peak Surge Power (Ppk) | 225 W @ 8 × 20 µs pulse - enables transient overvoltage suppression without failure during ESD or load-dump events. |
| Dynamic Impedance (ZZT) | ≈20 Ω @ IZ = 20 mA - ensures minimal output voltage variation under changing load current in regulation mode. |
| Reverse Leakage (IR) | ≤4 µA @ VR = 1 V - guarantees negligible standby current draw in battery-powered or low-power sensing nodes. |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust electrostatic discharge immunity during handling and board-level integration. |
| Operating Temperature | −55°C to +150°C - supports deployment in under-hood automotive, industrial control, and outdoor electronics. |
Pinout & Package
SOD−123 plastic surface-mount package (Case 425, Style 1), void-free thermosetting epoxy case with corrosion-resistant, solderable finish; cathode indicated by band; 260°C max soldering temperature for 10 seconds; UL 94 V−0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs at specified VZ. |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential reference; completes current path during regulation or forward conduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive applications including engine control units and body electronics requiring zero-defect reliability. |
| Low-Voltage Precision Regulation | 2.2 V nominal Zener with ±5% tolerance enables accurate 2.5 V or 3.3 V LDO feedback referencing without trimming resistors. |
| High Surge Withstand | 225 W peak power rating allows direct placement across IC power pins to absorb fast transients without derating. |
| Pb−Free & RoHS Compliant | Meets global environmental compliance requirements and supports lead-free reflow profiles up to 260°C. |
| Small-Signal SOD−123 Footprint | 1.8 mm × 1.2 mm × 0.9 mm outline enables placement in space-constrained modules such as wearables and IoT sensors. |
Applications
| Automotive Sensor Biasing | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Providing stable 2.2 V bias to analog output sensors (e.g., pressure or temperature transducers) in engine control modules. IC Role / Device Role / Timing Role: Low-voltage Zener reference diode maintaining constant excitation voltage despite battery voltage fluctuations (9–16 V). Use Value: Ensures sensor output linearity and accuracy over full temperature range (−40°C to +125°C) with <±1% drift due to tight VZ tolerance and low TC. |
Use Scenario: Clamping USB VBUS line against ESD strikes and hot-plug transients in portable docking stations. IC Role / Device Role / Timing Role: Fast-response shunt protector diverting surge energy before it reaches downstream USB controller ICs. Use Value: Absorbs 8 × 20 µs surges up to 225 W without degradation, meeting IEC 61000-4-2 Level 4 (±15 kV air/±8 kV contact) requirements. |
| Industrial PLC Input Conditioning | Low-Power MCU Reset Circuitry |
|
Use Scenario: Regulating input voltage to optocoupler-based digital inputs in programmable logic controllers exposed to 24 V field wiring noise. IC Role / Device Role / Timing Role: Zener clamp limiting input voltage to safe levels for internal logic-level translation circuitry. Use Value: Prevents latch-up and damage from induced transients while drawing only ≤4 µA leakage at 1 V reverse bias, minimizing quiescent power loss. |
Use Scenario: Generating clean reset threshold for ultra-low-power microcontrollers in battery-operated remote monitors. IC Role / Device Role / Timing Role: Precision voltage reference triggering external reset IC or internal brown-out detection. Use Value: Delivers 2.2 V reference with ±5% tolerance and −55°C to +150°C operation, ensuring reliable reset assertion across extreme ambient conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C2V2 | 2.2 V nominal, ±5% tolerance, SOD-323 package, 300 mW PD, higher ZZT (~30 Ω) | Lower power rating and larger dynamic impedance reduce stability in high-current regulation loops. | Select when board space is more constrained than power margin, and surge immunity is secondary. |
| MMBZ5221BS | 2.2 V nominal, ±5% tolerance, SOT-23 package, 225 mW PD, 10 µA IR @ 1 V | Lower power rating and higher leakage limit use in precision low-power references or high-temp environments. | Prefer for cost-sensitive consumer designs where AEC−Q101 qualification and 225 W surge are not required. |
Compared with BZX584C2V2 and MMBZ5221BS, the MMSZ4680ET1G offers superior surge robustness (225 W vs. ≤100 W), tighter thermal performance (−55°C to +150°C), and automotive qualification-making it the preferred choice for mission-critical industrial and automotive voltage regulation where reliability outweighs footprint savings.
Availability
MMSZ4680ET1G is available at Aetrix Electronics and suitable for automotive sensor biasing, USB port overvoltage protection, and industrial PLC input conditioning requiring stable component supply, long-term lifecycle support, and AEC−Q101-compliant traceability.
Supply support for MMSZ4680ET1G 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 manufacturer specializing in energy-efficient power management, signal processing, and sensing technologies for automotive, industrial, cloud, and consumer markets.
The MMSZ4xxxET1G series was designed specifically for high-reliability, low-voltage Zener regulation in space-constrained and thermally aggressive applications-including automotive ECUs, industrial sensors, and portable electronics-where precision, surge immunity, and AEC−Q101 compliance are mandatory.
FAQ
What is the nominal Zener voltage and tolerance of the MMSZ4680ET1G?
The MMSZ4680ET1G has a nominal Zener voltage of 2.2 V with a tolerance of ±5%, meaning its actual Zener voltage falls between 2.09 V and 2.31 V when tested at IZT = 50 mA and TA = 25°C. This tight tolerance ensures predictable clamping behavior in precision reference and protection circuits, and the MMSZ4680ET1G maintains this specification across its full operating temperature range.
Is the MMSZ4680ET1G qualified for automotive applications?
Yes, the MMSZ4680ET1G is AEC−Q101 qualified and PPAP capable, confirming its suitability for automotive electronic systems including engine control, body electronics, and ADAS sensors. The MMSZ4680ET1G undergoes stress testing for temperature cycling, humidity, mechanical shock, and ESD per AEC−Q101 standards, and its SOD−123 package supports reflow compatibility with automotive PCB assembly processes.
What is the maximum peak surge power the MMSZ4680ET1G can handle?
The MMSZ4680ET1G is rated for 225 W peak nonrepetitive surge power under an 8 × 20 µs pulse waveform at TA = 25°C. This rating allows the MMSZ4680ET1G to safely absorb transient energy from ESD events, inductive switching spikes, or load-dump conditions without permanent degradation-critical for protecting downstream ICs in harsh electrical environments.
How does the MMSZ4680ET1G perform at elevated temperatures?
The MMSZ4680ET1G operates reliably from −55°C to +150°C, with Zener voltage exhibiting low temperature coefficient (≈−3.5 mV/°C near 2.2 V) and minimal drift over temperature. Its 150 °C/W junction-to-lead thermal resistance enables effective heat dissipation even in thermally dense layouts, and the MMSZ4680ET1G maintains full 500 mW power rating up to 75°C board temperature before linear derating begins.
What packaging and marking information applies to the MMSZ4680ET1G?
The MMSZ4680ET1G is supplied in Pb−free SOD−123 tape-and-reel packaging (3,000 units per reel), with cathode identified by a band on terminal 1. Its device marking is "CF8", followed by a date code and "M" indicating Pb−free compliance. The MMSZ4680ET1G meets UL 94 V−0 flammability rating and supports IR reflow profiles up to 260°C for 10 seconds, aligning with industry-standard lead-free assembly requirements.
MMSZ4680ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- 4 µA @ 1 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
MMSZ4680ET1G FAQ
1.How can I place an order for MMSZ4680ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ4680ET1G 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 MMSZ4680ET1G reliable?
The price and inventory of MMSZ4680ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ4680ET1G is usually 5 days.
3.What payment methods are accepted for MMSZ4680ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ4680ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ4680ET1G?
MMSZ4680ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ4680ET1G 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 MMSZ4680ET1G?
For technical support, including MMSZ4680ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ4680ET1G requirements.
6.How does Aetrix verify that MMSZ4680ET1G is sourced from the original manufacturer or authorized distributors?
All MMSZ4680ET1G 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 MMSZ4680ET1G meets industry standards.
7.What is the process for return or replacement of MMSZ4680ET1G?
All MMSZ4680ET1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ4680ET1G, 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 MMSZ4680ET1G part is unused and in its original packaging.
Return procedure for MMSZ4680ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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