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onsemi SZMM5Z5V1ST5G
- Part No.:
- SZMM5Z5V1ST5G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SC-79, SOD-523
- Datasheet:
-
SZMM5Z5V1ST5G.pdf
- Description:
- DIODE ZENER 5.1V 500MW SOD523
- Quantity:
- Payment:
- Shipping:
Inventory:7,985
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Product details
Overview
SZMM5Z5V1ST5G from onsemi is a 5.1 V ±2% tolerance Zener diode in SOD-523 package, rated for 500 mW steady-state power dissipation at 25 °C, with 60 Ω maximum Zener impedance at 5 mA test current and 2.0 µA reverse leakage at 3.8 V, used for precision voltage regulation and overvoltage protection in space-constrained portable electronics.
For engineers reviewing the SZMM5Z5V1ST5G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±2%), low-profile SOD-523 footprint (1.20 mm × 0.80 mm), AEC-Q101 qualification, 16 kV HBM ESD rating, and tight thermal coefficient (−2.7 mV/°C).
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown to clamp voltage at 4.98–5.20 V under 5 mA test current. Its 60 Ω dynamic impedance ensures stable regulation across load variations, while the −2.7 mV/°C temperature coefficient minimizes drift over −65 to +150 °C operating range.
Designed for surface-mount use on FR-4 PCBs, it delivers 500 mW power handling with 4.0 mW/°C derating above 25 °C and 250 °C/W junction-to-ambient thermal resistance. The SOD-523 package supports reflow up to 260 °C and meets MSL 1 moisture sensitivity level.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 4.98 V to 5.20 V at 5 mA - defines precise clamping threshold for protection circuits |
| Tolerance | ±2% - enables high-accuracy voltage reference without external trimming |
| Zener Impedance | 60 Ω max at IZT = 5 mA - ensures minimal output voltage variation under load transients |
| Power Dissipation | 500 mW at TA = 25 °C - supports robust operation in compact handheld PCB layouts |
| ESD Rating | Class 3 (>16 kV HBM) - provides inherent system-level ESD immunity without added TVS |
| Temp Coefficient | −2.7 mV/°C at 5 mA - reduces thermal drift in battery-powered ambient environments |
| Capacitance | 225 pF max at VR = 0, f = 1 MHz - limits high-frequency noise coupling in signal path applications |
Pinout & Package
Package: SOD-523 (Case 502, Style 1), dimensions 1.20 mm × 0.80 mm × 0.60 mm, cathode marked with polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased terminal | Connected to regulated voltage node; conducts when input exceeds 4.98–5.20 V |
| 2 (Anode) | Reference/ground terminal | Typically tied to system ground or low-impedance return path for stable breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Tight voltage tolerance | ±2% Zener voltage - eliminates need for post-assembly calibration in voltage monitor designs |
| AEC-Q101 qualification | Automotive-grade reliability - validated for under-hood and infotainment subsystems requiring PPAP compliance |
| Pb-free & RoHS compliant | 100% matte tin lead finish - compatible with lead-free reflow processes and environmental regulations |
| Low-profile SOD-523 | 0.60 mm height - enables placement beneath connectors or near fine-pitch ICs on HDI boards |
| High ESD immunity | 16 kV HBM - protects downstream analog inputs in USB, audio, and sensor interfaces |
Applications
| Smartphone Power Rail Protection | USB-C Port Overvoltage Clamp |
|---|---|
Use Scenario: Protecting 5 V USB power delivery lines from transient surges during hot-plug events. IC Role / Device Role / Timing Role: Zener clamping diode placed between VBUS and GND to shunt excess energy before LDO input. Use Value: 5.1 V breakdown with ±2% tolerance ensures clamping occurs before damage threshold of 5.5 V-rated USB PHYs. | Use Scenario: Safeguarding Type-C receptacle pins against accidental 12 V or 20 V misconnection. IC Role / Device Role / Timing Role: Standby protection element connected directly to CC and VCONN lines. Use Value: 225 pF capacitance avoids signal integrity degradation on 10 Gbps SuperSpeed lanes while providing fast response. |
| Wearable Battery Monitor Reference | Industrial Sensor Signal Conditioning |
Use Scenario: Providing stable 5.1 V reference for ADC biasing in coin-cell powered health monitors. IC Role / Device Role / Timing Role: Precision voltage reference source for analog front-end gain stages. Use Value: −2.7 mV/°C tempco maintains <0.5% reference error across −20 to +60 °C wearable operating range. | Use Scenario: Regulating excitation voltage for 4–20 mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Shunt regulator maintaining constant 5.1 V across sense resistor network. Use Value: 60 Ω Zener impedance ensures <10 mV ripple under 1 mA load variation typical in 4–20 mA loop design. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584B5V1LT1G | Same 5.1 V ±2%, but SOD-323 package (1.7 mm × 1.3 mm); 100 mW lower power rating (400 mW) | Larger footprint; unsuitable where board area is constrained below 1.20 mm × 0.80 mm | Select only if existing layout accommodates SOD-323 and thermal margin permits 400 mW |
| MMSZ5231BT1G | 5.1 V ±5% tolerance; SOD-123 package (3.7 mm × 1.6 mm); 500 mW rating; no AEC-Q101 qualification | Loose tolerance increases reference uncertainty; larger size limits high-density placement | Acceptable for cost-sensitive industrial controls where ±5% regulation is sufficient and automotive compliance not required |
Compared with BZX584B5V1LT1G and MMSZ5231BT1G, SZMM5Z5V1ST5G offers superior space efficiency (SOD-523), tighter tolerance (±2%), and automotive qualification-making it optimal for next-gen portable and automotive electronics where footprint, accuracy, and reliability are co-constrained.
Availability
SZMM5Z5V1ST5G is available at Aetrix Electronics and suitable for smartphone power rail protection, USB-C port overvoltage clamp, and wearable battery monitor reference requiring stable component supply across high-mix production runs.
Supply support for SZMM5Z5V1ST5G 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.
The MM5Z/SZMM5Z series targets space-constrained voltage regulation and ESD protection in portable and automotive electronics, emphasizing ultra-small packaging, tight tolerances, and AEC-Q101 compliance.
FAQ
What is the Zener voltage range for SZMM5Z5V1ST5G?
The SZMM5Z5V1ST5G has a specified Zener voltage range of 4.98 V to 5.20 V at 5 mA test current, corresponding to a nominal 5.1 V with ±2% tolerance. This range is verified per onsemi's Electrical Characteristics table and defines the device's clamping behavior under standard operating conditions. The SZMM5Z5V1ST5G maintains this performance across its full operating temperature range of −65 °C to +150 °C.
Is SZMM5Z5V1ST5G qualified for automotive applications?
Yes, SZMM5Z5V1ST5G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the onsemi datasheet. The "SZ" prefix denotes devices meeting automotive-specific site and control change requirements. It is suitable for under-hood and infotainment systems where reliability, traceability, and process validation are mandatory. The SZMM5Z5V1ST5G also features 16 kV HBM ESD rating and Pb-free RoHS compliance.
What is the maximum power dissipation of SZMM5Z5V1ST5G at 75 °C ambient?
At 75 °C ambient, SZMM5Z5V1ST5G dissipates a maximum of 300 mW. This is calculated using the 4.0 mW/°C derating factor from the datasheet: 500 mW − (75 − 25) × 4.0 mW = 300 mW. The device's thermal resistance is 250 °C/W, and its junction temperature must remain ≤150 °C. Derating applies to FR-4 boards with 1 cm² copper pad, as defined in Note 1 of the Maximum Ratings table.
Does SZMM5Z5V1ST5G have polarity marking on the SOD-523 package?
Yes, SZMM5Z5V1ST5G uses Style 1 marking per the onsemi mechanical drawing: Pin 1 (cathode) is identified by a polarity band. The marking diagram shows "XX M" where "XX" is the device code (TA for 5.1 V) and "M" is the date code. A microdot may also indicate the cathode end, though orientation varies by manufacturing location. This polarity marking ensures correct orientation during automated placement.
What is the reverse leakage current specification for SZMM5V1ST5G at 3.8 V?
The reverse leakage current for SZMM5Z5V1ST5G is specified as 2.0 µA maximum at VR = 3.8 V and TA = 25 °C, per the Electrical Characteristics table. This parameter confirms the device remains effectively non-conductive below its Zener knee, minimizing standby power loss in always-on circuits. The SZMM5Z5V1ST5G achieves this while maintaining low dynamic impedance and tight voltage tolerance.
SZMM5Z5V1ST5G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- SC-79, SOD-523
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 5.1 V
- Tolerance:
- ±2.16%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-523
SZMM5Z5V1ST5G FAQ
1.How can I place an order for SZMM5Z5V1ST5G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMM5Z5V1ST5G 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 SZMM5Z5V1ST5G reliable?
The price and inventory of SZMM5Z5V1ST5G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMM5Z5V1ST5G is usually 5 days.
3.What payment methods are accepted for SZMM5Z5V1ST5G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMM5Z5V1ST5G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMM5Z5V1ST5G?
SZMM5Z5V1ST5G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMM5Z5V1ST5G 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 SZMM5Z5V1ST5G?
For technical support, including SZMM5Z5V1ST5G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMM5Z5V1ST5G requirements.
6.How does Aetrix verify that SZMM5Z5V1ST5G is sourced from the original manufacturer or authorized distributors?
All SZMM5Z5V1ST5G 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 SZMM5Z5V1ST5G meets industry standards.
7.What is the process for return or replacement of SZMM5Z5V1ST5G?
All SZMM5Z5V1ST5G units undergo pre-shipment inspection (PSI). If there is an issue with SZMM5Z5V1ST5G, 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 SZMM5Z5V1ST5G part is unused and in its original packaging.
Return procedure for SZMM5Z5V1ST5G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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