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onsemi MMSZ15ET1G
- Part No.:
- MMSZ15ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ15ET1G.pdf
- Description:
- DIODE ZENER 15V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,941
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Product details
Overview
MMSZ15ET1G from onsemi is a 15 V, ±5% tolerance Zener diode in SOD-123 package, rated for 500 mW power dissipation at 75 °C on FR-5 board, with 30 Ω dynamic impedance at 5 mA test current and 0.05 µA reverse leakage at 10.5 V, used for precision voltage regulation and overvoltage protection in low-power analog and power supply feedback circuits.
For engineers reviewing the MMSZ15ET1G datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating behavior, cathode/anode polarity mapping, automotive-grade AEC-Q101 qualification status, and direct alternative part comparisons for stable BOM design.
Technical Context
The MMSZ15ET1G operates as a two-terminal voltage reference device, conducting in reverse breakdown to clamp voltage across its terminals when reverse-biased above 14.25 V (min) and below 15.75 V (max) at IZT = 5 mA. Its junction-to-ambient thermal resistance is 340 °C/W, enabling operation from −55 °C to +150 °C.
It features Class 3 ESD robustness (>16 kV HBM), peak surge capability of 225 W (8 × 20 µs pulse), and Pb-free SOD-123 packaging optimized for automated surface-mount assembly. The device is AEC-Q101 qualified and PPAP capable for automotive applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V nominal, ±5% tolerance (14.25–15.75 V at IZT = 5 mA); defines precise clamping threshold for feedback or protection circuits. |
| Power Dissipation (PD) | 500 mW at TL = 75 °C on FR-5 board; derates linearly at 6.7 mW/°C above 75 °C - critical for thermal layout planning. |
| Zener Impedance (ZZT) | 30 Ω max at IZT = 5 mA and f = 1 kHz; determines voltage regulation stability under varying load current. |
| Reverse Leakage (IR) | 0.05 µA max at VR = 10.5 V; ensures minimal quiescent current draw in high-impedance bias networks. |
| ESD Rating | Class 3 (>16 kV) per Human Body Model; supports robust handling in automated manufacturing without added protection circuitry. |
| Operating Temperature | −55 °C to +150 °C junction/storage range; validated for under-hood automotive and industrial environments. |
| AEC-Q101 Qualified | Qualified per AEC-Q101 Rev D; meets stress test requirements for automotive electronics reliability and lifetime validation. |
Pinout & Package
SOD-123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with corrosion-resistant, solderable finish; cathode indicated by polarity band; UL 94 V-0 flammability rating; maximum soldering temperature 260 °C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Banded End) | Cathode | Connected to regulated output or reference node; reverse-bias terminal where Zener breakdown occurs. |
| 2 (Non-banded End) | Anode | Connected to ground or lower-potential rail; completes reverse-bias path for regulation or clamping function. |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in higher-current regulation nodes than standard 250 mW Zeners - e.g., TL431 auxiliary references or LDO feedback dividers. |
| ±5% Tight Voltage Tolerance | Reduces need for external trimming in voltage reference designs; supports single-supply sensor biasing without calibration. |
| 340 °C/W Thermal Resistance | Allows direct thermal modeling on standard PCBs; enables compact layout without heatsinking in <100 mW average power applications. |
| AEC-Q101 Qualification | Validates long-term reliability under automotive thermal cycling, humidity, and mechanical shock - no requalification needed for Tier 1 designs. |
| Class 3 ESD Robustness | Eliminates need for discrete ESD protection in front-end voltage monitoring paths, reducing component count in battery management systems. |
Applications
| Automotive Sensor Reference | Industrial Power Supply Feedback |
|---|---|
|
Use Scenario: Providing stable 15 V reference for analog signal conditioning of engine coolant temperature or pressure sensors in engine control units. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference, replacing bulkier three-terminal IC references where space and cost are constrained. Use Value: Delivers ±5% accuracy over −40 °C to +125 °C ambient without active compensation, supporting ASIL-B functional safety compliance via predictable failure mode. |
Use Scenario: Clamping feedback voltage in isolated flyback converter secondary-side regulation to maintain ±3% output tolerance across line/load transients. IC Role / Device Role / Timing Role: Shunt regulator element in optocoupler feedback loop, setting upper bound on TL431 reference voltage. Use Value: 30 Ω ZZT minimizes regulation error during fast load steps; 225 W surge rating absorbs transient coupling from primary-side MOSFET switching noise. |
| Portable Medical Device Biasing | IoT Node Overvoltage Protection |
|
Use Scenario: Generating clean 15 V bias for op-amp rails in handheld ECG front-ends powered from Li-ion batteries with variable voltage (3.0–4.2 V). IC Role / Device Role / Timing Role: Zener-based charge-pump voltage booster stage, regulating boosted rail for analog signal chain components. Use Value: 0.05 µA leakage at 10.5 V preserves battery life in sleep mode; AEC-Q101 qualification ensures reliability in field-deployed diagnostic tools. |
Use Scenario: Protecting 3.3 V microcontroller GPIO pins from accidental 12–24 V miswiring in smart building sensor nodes. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between I/O line and ground, clamping surges before reaching MCU ESD structures. Use Value: 225 W 8×20 µs surge rating handles common industrial cable discharge events; SOD-123 footprint allows placement directly at connector entry point. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C15LT1G | Same 15 V nominal, ±5% tolerance, but 300 mW rating and 40 Ω ZZT; SOT-23 package (larger footprint, higher RJA = 375 °C/W). | Lower power handling limits use in >10 mA continuous regulation; less suitable for automotive under-hood thermal environments. | Select when board space permits SOT-23 and thermal budget exceeds 100 mW average dissipation. |
| MMBZ5245BLT1G | 15 V nominal, ±5%, but 225 mW rating and 17 Ω ZZT; SOT-23 package; not AEC-Q101 qualified. | Higher dynamic impedance stability at low currents, but lacks automotive qualification and surge rating - limited to consumer-grade applications. | Choose only for cost-sensitive, non-automotive designs requiring tighter low-current regulation and no thermal stress validation. |
Compared with MMSZ15ET1G, BZX84-C15LT1G offers identical voltage spec but reduced power and thermal performance, while MMBZ5245BLT1G trades AEC-Q101 compliance and surge robustness for marginally better low-current Zener impedance - making MMSZ15ET1G the sole choice for automotive or industrial-grade 15 V shunt regulation.
Availability
MMSZ15ET1G is available at Aetrix Electronics and suitable for automotive sensor reference, industrial power supply feedback, portable medical device biasing, and IoT node overvoltage protection requiring stable component supply with full traceability and lifecycle continuity.
Supply support for MMSZ15ET1G 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMSZxxxET1G series is designed for high-reliability, space-constrained voltage regulation and protection in automotive and industrial systems - emphasizing AEC-Q101 qualification, tight tolerances, and robust surge handling in miniature SOD-123 packaging.
FAQ
What is the Zener voltage tolerance of the MMSZ15ET1G?
The MMSZ15ET1G has a nominal Zener voltage of 15 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 14.25 V and 15.75 V when tested at IZT = 5 mA and TA = 25 °C. This tolerance is guaranteed across the full operating temperature range and applies to all units in the production lot - no binning required.
Is the MMSZ15ET1G suitable for automotive applications?
Yes, the MMSZ15ET1G is AEC-Q101 qualified and PPAP capable, meeting the stress testing and reliability requirements for automotive electronics. It operates from −55 °C to +150 °C, supports high-temperature under-hood environments, and carries Class 3 ESD robustness - making it appropriate for engine control, body electronics, and ADAS subsystems.
What is the maximum power dissipation of the MMSZ15ET1G at 100 °C ambient?
At 100 °C ambient (or lead temperature), the MMSZ15ET1G's power dissipation must be derated from its 500 mW rating at 75 °C. Using the specified derating factor of 6.7 mW/°C, the allowable power drops to 332.5 mW - calculated as 500 mW − (6.7 mW/°C × (100 °C − 75 °C)). This value must be respected in thermal design.
How does the dynamic impedance of the MMSZ15ET1G affect voltage regulation accuracy?
The MMSZ15ET1G has a maximum dynamic impedance (ZZT) of 30 Ω at IZT = 5 mA and 1 kHz. This means a 1 mA change in Zener current causes up to a 30 mV shift in clamped voltage - directly impacting regulation precision in feedback loops or reference circuits where load current varies dynamically.
What is the reverse leakage current specification for the MMSZ15ET1G at 10.5 V?
The MMSZ15ET1G specifies a maximum reverse leakage current (IR) of 0.05 µA at VR = 10.5 V and TA = 25 °C. This ultra-low leakage ensures minimal current draw in high-impedance bias networks - critical for battery-powered applications where standby current must remain below 100 nA.
MMSZ15ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 nA @ 10.5 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
MMSZ15ET1G FAQ
1.How can I place an order for MMSZ15ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ15ET1G 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 MMSZ15ET1G reliable?
The price and inventory of MMSZ15ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ15ET1G is usually 5 days.
3.What payment methods are accepted for MMSZ15ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ15ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ15ET1G?
MMSZ15ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ15ET1G 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 MMSZ15ET1G?
For technical support, including MMSZ15ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ15ET1G requirements.
6.How does Aetrix verify that MMSZ15ET1G is sourced from the original manufacturer or authorized distributors?
All MMSZ15ET1G 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 MMSZ15ET1G meets industry standards.
7.What is the process for return or replacement of MMSZ15ET1G?
All MMSZ15ET1G units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ15ET1G, 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 MMSZ15ET1G part is unused and in its original packaging.
Return procedure for MMSZ15ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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