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onsemi MMSZ6V8ET1
- Part No.:
- MMSZ6V8ET1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ6V8ET1.pdf
- Description:
- DIODE ZENER 6.8V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,719
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Product details
Overview
MMSZ6V8ET1 from onsemi is a 6.8 V ±5% Zener diode in SOD-123 package, rated for 500 mW power dissipation at 75 °C on FR-5 board, with 15 Ω dynamic impedance at 5 mA test current and 2 μA reverse leakage at 5.6 V, used for precision voltage regulation and overvoltage protection in low-power analog circuits.
For engineers reviewing the MMSZ6V8ET1 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode/anode terminal mapping, automotive-grade AEC-Q101 qualification status, and direct alternatives with documented Zener voltage tolerance and impedance differences.
Technical Context
This device operates as a two-terminal shunt regulator, maintaining stable output voltage across load variations by conducting reverse current above its specified Zener breakdown threshold. It exhibits a nominal temperature coefficient of +2.5 mV/°C near 6.8 V, enabling predictable drift compensation in temperature-sensitive references.
Designed for surface-mount assembly on FR-4/FR-5 PCBs, it supports automated placement with ESD immunity >16 kV (HBM Class 3) and withstands peak surge power up to 225 W in 8 × 20 µs pulses. Its junction-to-lead thermal resistance is 150 °C/W, critical for transient thermal management in compact layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.46 V min / 6.8 V nom / 7.14 V max at IZT = 5 mA - defines regulated voltage window under standard test conditions |
| Zener Impedance (ZZT) | 15 Ω max at IZT = 5 mA - determines output voltage stability under varying load current |
| Reverse Leakage Current | 2 μA max at VR = 5.6 V - limits standby power loss in high-impedance bias networks |
| Power Dissipation (PD) | 500 mW at TL = 75 °C on FR-5 board - sets maximum continuous DC power handling before thermal derating |
| Peak Surge Power | 225 W for 8 × 20 µs pulse - enables transient overvoltage clamping without failure |
| Junction Temperature Range | −55 °C to +150 °C - supports operation in automotive under-hood and industrial control environments |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress testing requirements including HTOL, TC, and ESD |
Pinout & Package
SOD-123 plastic surface-mount package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant finish, cathode indicated by polarity band, lead-free (Pb-free) construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (Non-banded End) | Anode | Connected to circuit ground or lower-potential reference; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in higher-current biasing and clamping applications than standard 250 mW Zeners |
| ±5% Zener Voltage Tolerance | Provides tight regulation without requiring post-production trimming in cost-sensitive designs |
| Class 3 ESD Protection | Eliminates need for external ESD protection in handheld and automotive interface circuits |
| AEC-Q101 Qualification | Reduces validation effort for automotive body electronics, infotainment, and ADAS subsystems |
| Small SOD-123 Footprint | Supports high-density PCB layouts in space-constrained modules such as sensor signal conditioning boards |
Applications
| Automotive Sensor Reference | Industrial Analog Input Protection |
|---|---|
Use Scenario: Providing stable 6.8 V reference for analog front-end amplifiers in vehicle cabin temperature sensors. IC Role / Device Role / Timing Role: Shunt voltage reference and overvoltage clamp for ADC input stage. Use Value: Maintains <±1% reference accuracy over −40 °C to +125 °C due to low tempco and AEC-Q101 thermal cycling validation. |
Use Scenario: Protecting programmable logic controller (PLC) analog input channels from field-induced transients. IC Role / Device Role / Timing Role: Low-energy crowbar element limiting input voltage to 7.2 V during surge events. Use Value: Absorbs 225 W peak surges without degradation, preventing damage to downstream op-amps and ADCs. |
| Consumer Audio Bias Supply | Medical Wearable Power Monitoring |
Use Scenario: Generating clean bias voltage for headphone amplifier ICs in portable Bluetooth speakers. IC Role / Device Role / Timing Role: Precision DC voltage source stabilizing amplifier quiescent point. Use Value: Delivers 6.8 V ±0.34 V with 15 Ω dynamic impedance, minimizing distortion from supply ripple. |
Use Scenario: Monitoring battery voltage thresholds in FDA Class II wearable ECG monitors. IC Role / Device Role / Timing Role: Overvoltage detection trigger for low-power supervisor ICs. Use Value: Activates shutdown at 7.14 V with sub-μA leakage, extending battery life in always-on monitoring mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V8 | Same 6.8 V nominal Zener voltage but ±6% tolerance and 40 Ω ZZT at 5 mA | Higher impedance reduces regulation precision in low-noise audio references | Select when cost sensitivity outweighs tight voltage stability requirements |
| MMSZ6V8ET1G | Pb-free version with identical electrical specs and SOD-123 package; "G" suffix denotes RoHS compliance | No functional difference; required for new designs targeting EU/China RoHS compliance | Choose MMSZ6V8ET1G for production releases after 2024; MMSZ6V8ET1 remains viable for legacy rework |
Compared with BZX84-C6V8, MMSZ6V8ET1 offers tighter voltage tolerance and lower dynamic impedance for improved regulation accuracy; compared with MMSZ6V8ET1G, it lacks Pb-free certification but shares identical performance and footprint-making it suitable for non-RoHS-restricted industrial repairs.
Availability
MMSZ6V8ET1 is available at Aetrix Electronics and suitable for automotive sensor references, industrial analog input protection, and consumer audio bias supplies requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMSZ6V8ET1 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 is a global semiconductor supplier delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications, with manufacturing and quality systems certified to ISO/TS 16949 and ISO 14001 standards.
The MMSZxxxET1 series belongs to onsemi's precision Zener regulator product line, engineered for high-reliability voltage reference and transient suppression in space-constrained, thermally demanding environments.
FAQ
What is the Zener voltage tolerance of MMSZ6V8ET1?
The MMSZ6V8ET1 has a nominal Zener voltage of 6.8 V with a tolerance of ±5%, resulting in a guaranteed range of 6.46 V to 7.14 V at IZT = 5 mA and TA = 25 °C. This tolerance is confirmed in the Electrical Characteristics table on page 2 of the official onsemi datasheet Rev. 8 (February 2026).
Is MMSZ6V8ET1 qualified for automotive applications?
Yes, MMSZ6V8ET1 is AEC-Q101 qualified and PPAP capable, as explicitly stated in the Specification Features section of the datasheet. This qualification covers stress tests including high-temperature operating life, temperature cycling, and human-body-model ESD (>16 kV), making it suitable for automotive body electronics and infotainment systems.
What is the maximum power dissipation of MMSZ6V8ET1 at 100 °C ambient?
At 100 °C ambient, MMSZ6V8ET1 must be derated from its 500 mW rating at 75 °C using the 6.7 mW/°C derating factor. The calculation yields 500 mW − (100 − 75) × 6.7 mW = 332.5 mW maximum continuous power dissipation, consistent with the Thermal Resistance (RJA = 340 °C/W) and derating curve in Figure 3 of the datasheet.
Does MMSZ6V8ET1 have a defined forward voltage specification?
Yes, MMSZ6V8ET1 specifies a maximum forward voltage of 0.95 V at IF = 10 mA and TA = 25 °C, as listed in the Electrical Characteristics summary on page 2. This parameter ensures predictable behavior when used in dual-role circuits requiring both forward conduction and reverse Zener regulation.
How does the temperature coefficient affect MMSZ6V8ET1's regulation accuracy?
MMSZ6V8ET1 exhibits a positive temperature coefficient of approximately +2.5 mV/°C near 6.8 V, meaning its Zener voltage increases linearly with junction temperature. Over a −40 °C to +125 °C range, this results in ~410 mV total drift, which must be accounted for in precision reference designs-verified via Figure 1 and Typical TC Values table in the datasheet.
MMSZ6V8ET1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 15 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 4 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
MMSZ6V8ET1 FAQ
1.How can I place an order for MMSZ6V8ET1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ6V8ET1 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 MMSZ6V8ET1 reliable?
The price and inventory of MMSZ6V8ET1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ6V8ET1 is usually 5 days.
3.What payment methods are accepted for MMSZ6V8ET1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ6V8ET1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ6V8ET1?
MMSZ6V8ET1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ6V8ET1 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 MMSZ6V8ET1?
For technical support, including MMSZ6V8ET1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ6V8ET1 requirements.
6.How does Aetrix verify that MMSZ6V8ET1 is sourced from the original manufacturer or authorized distributors?
All MMSZ6V8ET1 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 MMSZ6V8ET1 meets industry standards.
7.What is the process for return or replacement of MMSZ6V8ET1?
All MMSZ6V8ET1 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ6V8ET1, 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 MMSZ6V8ET1 part is unused and in its original packaging.
Return procedure for MMSZ6V8ET1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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