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onsemi SZMMSZ5258ET1G
- Part No.:
- SZMMSZ5258ET1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5258ET1G.pdf
- Description:
- DIODE ZENER 36V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:5,809
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Product details
Overview
SZMMSZ5258ET1G from onsemi is a 36 V ±5% Zener diode in SOD-123 package, rated for 500 mW power dissipation at 75 °C on FR-5 board, with 70 Ω maximum dynamic impedance at 3.4 mA test current and 0.1 µA reverse leakage at 27 V, used for precision voltage reference and overvoltage protection in automotive power management circuits.
For engineers reviewing the SZMMSZ5258ET1G datasheet, pinout, applications, or equivalent options, this page delivers verified Zener voltage tolerance, thermal derating behavior, junction-to-lead thermal resistance, ESD robustness (Class 3, >16 kV HBM), and AEC-Q101 qualification status - all critical for automotive-grade voltage regulation design.
Technical Context
This device operates as a two-terminal silicon Zener regulator with sharp reverse breakdown at nominal 36 V, designed for stable DC voltage clamping and reference generation under varying load and temperature conditions. Its 70 Ω dynamic impedance at IZT = 3.4 mA and 700 Ω impedance at IZK = 0.25 mA reflect low-noise regulation capability across its operating current range.
The SOD-123 package enables automated placement in high-density PCB layouts while maintaining 150 °C/W junction-to-lead thermal resistance and 340 °C/W junction-to-ambient rating. It is qualified to AEC-Q101, supports PPAP, and features Pb-free construction with UL 94 V-0 flammability rating.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 34.2 V (min) to 37.8 V (max) at IZT = 3.4 mA - defines tight ±5% regulation window for stable reference accuracy |
| Power Dissipation (PD) | 500 mW at TL = 75 °C on FR-5 board - sets maximum continuous power handling before thermal derating begins |
| Zener Impedance (ZZT) | 70 Ω max at IZT = 3.4 mA - determines AC ripple rejection and regulation stability under dynamic load |
| Reverse Leakage (IR) | 0.1 µA max at VR = 27 V - ensures minimal standby current in high-impedance bias networks |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - guarantees robustness against assembly and field electrostatic discharge events |
| Junction Temp Range | −55 °C to +150 °C - enables operation in under-hood automotive environments without derating loss |
Pinout & Package
SOD-123 surface-mount package: 2-pin, 1.60 × 2.69 × 1.16 mm body, cathode indicated by polarity band, void-free thermosetting plastic case with corrosion-resistant finish.
| 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 ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive applications including engine control units and body electronics requiring PPAP compliance |
| Peak Surge Power | 225 W for 8 × 20 µs pulse - protects downstream circuitry from transient overvoltage events like load dump |
| Thermal Resistance (RJL) | 150 °C/W junction-to-lead - enables efficient heat transfer to PCB copper, supporting higher reliability in compact layouts |
| Pb-Free Construction | RoHS-compliant SOD-123 package with UL 94 V-0 flammability rating - meets global environmental and safety standards |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Stabilizing 5 V or 3.3 V reference rails for microcontroller ADCs and analog front-ends in harsh under-hood environments. IC Role / Device Role / Timing Role: Zener voltage reference and overvoltage clamp protecting sensitive analog inputs from supply transients. Use Value: Maintains ±5% regulation accuracy across −40 °C to +125 °C ambient, enabling reliable sensor data acquisition without external regulators. |
Use Scenario: Providing stable bias voltage for bridge-based pressure or temperature sensors in factory automation systems. IC Role / Device Role / Timing Role: Precision shunt reference establishing known excitation voltage for ratiometric measurements. Use Value: Low 0.1 µA leakage at 27 V ensures minimal error contribution in high-impedance sensor bridges, improving measurement resolution. |
| DC-DC Converter Feedback Network | USB-C Power Delivery Protection |
Use Scenario: Setting precise output voltage in isolated flyback or buck-derived auxiliary supplies for industrial PLCs. IC Role / Device Role / Timing Role: Shunt element in optocoupler feedback loop to regulate secondary-side output voltage. Use Value: 70 Ω dynamic impedance ensures fast response to load steps, minimizing output voltage deviation during transient events. |
Use Scenario: Clamping overvoltage on VBUS lines during USB-C hot-plug or fault conditions in portable medical devices. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting VBUS to safe levels before damage occurs to PD controller ICs. Use Value: 225 W peak surge rating absorbs 8 × 20 µs load-dump-like surges common in USB-C adapter interconnects. |
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-C36LT1G | 36 V ±5%, SOT-23 package, 350 mW PD, 90 Ω ZZT @ 5 mA - lower power rating and higher impedance than SZMMSZ5258ET1G | Less suitable for high-current or high-temperature automotive use due to lower thermal performance and no AEC-Q101 qualification | Select when footprint constraints favor SOT-23 and AEC-Q101 is not required |
| MMSZ5258ET1G | Identical electrical specs (34.2–37.8 V, 70 Ω ZZT, 0.1 µA IR), same SOD-123 package, but non-automotive grade - lacks AEC-Q101 qualification and PPAP support | Acceptable for commercial/industrial applications where automotive reliability and traceability are not mandated | Select when cost sensitivity outweighs automotive qualification requirements |
Compared with BZX84-C36LT1G and MMSZ5258ET1G, the SZMMSZ5258ET1G provides superior thermal performance (500 mW vs. 350 mW), lower dynamic impedance (70 Ω vs. 90 Ω), and full AEC-Q101 compliance - making it the only choice for production automotive systems requiring PPAP documentation and extended temperature operation.
Availability
SZMMSZ5258ET1G is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor interfaces, DC-DC converter feedback networks, and USB-C power delivery protection requiring stable component supply with full AEC-Q101 traceability.
Supply support for SZMMSZ5258ET1G 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
SZMMSZ5258ET1G belongs to the SZ-prefix MMSZ52xxET1G series - engineered specifically for automotive-grade voltage regulation with AEC-Q101 qualification, PPAP capability, and enhanced process controls for mission-critical systems.
FAQ
What is the Zener voltage tolerance of SZMMSZ5258ET1G?
The SZMMSZ5258ET1G has a nominal Zener voltage of 36 V with a standard tolerance of ±5%, resulting in a guaranteed range of 34.2 V to 37.8 V when measured at IZT = 3.4 mA and thermal equilibrium at TL = 30 °C ±1 °C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet.
Is SZMMSZ5258ET1G qualified for automotive applications?
Yes, SZMMSZ5258ET1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. The "SZ" prefix denotes automotive-specific site and control change requirements, and the device meets stringent reliability and traceability standards required for production automotive electronics.
What is the maximum power dissipation of SZMMSZ5258ET1G at 100 °C ambient?
SZMMSZ5258ET1G is rated for 500 mW at TL = 75 °C on FR-5 board, with linear derating of 6.7 mW/°C above that temperature. At 100 °C lead temperature, power dissipation is reduced to 332.5 mW (500 mW − 6.7 mW/°C × 25 °C), ensuring safe operation within thermal limits without exceeding junction temperature.
How does the ESD rating of SZMMSZ5258ET1G compare to standard industrial Zeners?
SZMMSZ5258ET1G achieves Class 3 ESD rating (>16 kV) per Human Body Model, significantly exceeding typical industrial Zeners rated at Class 2 (4–8 kV). This robustness is validated per AEC-Q101 test conditions and ensures resilience during automated assembly and field operation in electrically noisy automotive environments.
What is the reverse leakage current specification for SZMMSZ5258ET1G at 27 V?
The reverse leakage current for SZMMSZ5258ET1G is specified as 0.1 µA maximum at VR = 27 V, as listed in the Electrical Characteristics table on page 3 of the onsemi datasheet. This low leakage supports high-impedance bias networks and minimizes error in precision reference applications.
SZMMSZ5258ET1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZMMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 70 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 27 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
SZMMSZ5258ET1G FAQ
1.How can I place an order for SZMMSZ5258ET1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5258ET1G 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 SZMMSZ5258ET1G reliable?
The price and inventory of SZMMSZ5258ET1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5258ET1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ5258ET1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5258ET1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5258ET1G?
SZMMSZ5258ET1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5258ET1G 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 SZMMSZ5258ET1G?
For technical support, including SZMMSZ5258ET1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5258ET1G requirements.
6.How does Aetrix verify that SZMMSZ5258ET1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5258ET1G 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 SZMMSZ5258ET1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ5258ET1G?
All SZMMSZ5258ET1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5258ET1G, 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 SZMMSZ5258ET1G part is unused and in its original packaging.
Return procedure for SZMMSZ5258ET1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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