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onsemi SZMMSZ5222BT1G
- Part No.:
- SZMMSZ5222BT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5222BT1G.pdf
- Description:
- DIODE ZENER 2.5V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,756
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Product details
Overview
SZMMSZ5222BT1G from onsemi is a 2.5 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 1250 Ω maximum dynamic impedance at 20 mA test current and 0.25 μA reverse leakage at 100 V, used for precision voltage reference and overvoltage protection in low-power analog circuits.
For engineers reviewing the SZMMSZ5222BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal equilibrium voltage specification, junction-to-lead thermal resistance (150 °C/W), and AEC−Q101 qualification for automotive use cases.
Technical Context
This device operates as a two-terminal voltage reference diode, conducting in reverse breakdown when biased above its nominal 2.5 V Zener voltage at IZT = 20 mA. Its voltage regulation relies on controlled avalanche and Zener mechanisms, with temperature coefficient optimized for stability across −55°C to +150°C.
It is characterized under thermal equilibrium conditions (TL = 30°C ±1°C), with specified Zener impedance measured using 1 kHz AC signal at 0.1×DC test current. The SOD−123 package supports automated placement and provides Class 3 ESD robustness (>16 kV HBM).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.5 V nominal, 2.38–2.63 V range at IZT = 20 mA - defines stable regulation point under thermal equilibrium |
| Power Dissipation (PD) | 500 mW on FR−5 board at TL = 75°C - sets maximum continuous DC power handling before thermal derating |
| Zener Impedance (ZZT) | 1250 Ω max at IZT = 20 mA - determines output voltage variation under load current changes |
| Reverse Leakage (IR) | 0.25 μA max at VR = 100 V - ensures minimal standby current in high-impedance bias networks |
| Junction Temp Range | −55°C to +150°C - enables operation in under-hood automotive and industrial environments |
| ESD Rating | Class 3 (>16 kV) per HBM - supports robust handling during PCB assembly and field operation |
| AEC−Q101 Qualified | Yes - validates reliability for automotive electronics applications requiring PPAP documentation |
Pinout & Package
The SZMMSZ5222BT1G uses the SOD−123 surface-mount plastic package (Case 425, Style 1), measuring 1.60 × 2.69 × 1.16 mm, with cathode indicated by a polarity band. It is Pb−free and UL 94 V−0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased terminal | Connected to regulated voltage node; must be held at higher potential than anode to enable Zener conduction |
| 2 (Anode) | Reference/ground terminal | Typically tied to system ground or lowest potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Thermal Equilibrium Voltage Spec | Zener voltage measured at TL = 30°C ±1°C - ensures repeatable, production-ready voltage accuracy |
| Automated Assembly Optimized | SOD−123 footprint and void-free mold compound - enables high-yield pick-and-place and reflow soldering |
| High-Density Packaging | 1.60 × 2.69 mm outline - supports compact designs in space-constrained portable and automotive modules |
| Medium-Current Regulation | Rated for 20 mA IZT, 30 mA IZK - balances regulation precision with low-power circuit compatibility |
| Pb−Free & RoHS Compliant | Meets JEDEC J-STD-020 moisture sensitivity level 1 - simplifies global manufacturing and environmental compliance |
Applications
| Automotive Sensor Biasing | Industrial Analog Front-End |
|---|---|
Use Scenario: Providing stable 2.5 V reference for MEMS pressure sensor signal conditioning in engine control units. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for op-amp biasing and ADC reference scaling. Use Value: Maintains <±1% output stability over −40°C to +125°C ambient due to AEC−Q101 validation and low TC design. | Use Scenario: Regulating supply to low-power instrumentation amplifiers in programmable logic controller (PLC) analog input modules. IC Role / Device Role / Timing Role: Shunt regulator establishing precise local reference for 16-bit sigma-delta ADCs. Use Value: Delivers 2.5 V ±5% accuracy with <0.25 μA leakage, minimizing error contribution in high-impedance sensor interfaces. |
| Consumer Power Management | Medical Wearable Monitoring |
Use Scenario: Clamping and regulating battery monitor IC supply in USB-C powered portable devices. IC Role / Device Role / Timing Role: Overvoltage protector and voltage stabilizer for fuel gauge ICs operating from Li-ion cells. Use Value: Withstands 16 kV HBM ESD and maintains regulation during transient load steps up to 20 mA. | Use Scenario: Generating reference voltage for ECG front-end amplifier in FDA-cleared wearable heart rate monitors. IC Role / Device Role / Timing Role: Precision shunt reference enabling sub-microvolt noise performance in biopotential acquisition. Use Value: Low 1250 Ω ZZT minimizes output impedance-induced gain error in high-gain differential stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5222BT1G | No AEC−Q101 qualification; same electrical specs and SOD−123 package | Intended for commercial/industrial use only - not approved for automotive PPAP | Select when automotive qualification is unnecessary and cost sensitivity is high |
| SZMMBZ5222BS | SOD−323 package (1.7 × 1.25 × 0.95 mm); same 2.5 V ±5%, but lower PD = 350 mW | Used where board area is more constrained than power margin - e.g., ultra-thin wearables | Select when footprint reduction outweighs need for 500 mW headroom |
Compared with MMSZ5222BT1G, SZMMSZ5222BT1G adds AEC−Q101 compliance for automotive deployment, while SZMMBZ5222BS trades power rating for smaller size - choice depends on qualification requirements and spatial constraints, not electrical equivalence.
Availability
SZMMSZ5222BT1G is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial analog front-end design, and medical wearable monitoring requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for SZMMSZ5222BT1G 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The SZMMSZ52xxxT1G series is part of onsemi's automotive-qualified Zener regulator portfolio, designed specifically for reliable voltage reference and overvoltage protection in harsh-environment electronics where AEC−Q101 validation and thermal stability are mandatory.
FAQ
What is the nominal Zener voltage and tolerance of SZMMSZ5222BT1G?
The SZMMSZ5222BT1G has a nominal Zener voltage of 2.5 V with a ±5% tolerance, specified at IZT = 20 mA under thermal equilibrium conditions (TL = 30°C ±1°C). Its actual voltage range is 2.38 V to 2.63 V, making it suitable for applications requiring moderate precision without tight voltage drift budgets. This tolerance aligns with the "B" suffix designation in the MMSZ52xxxT1G family.
Is SZMMSZ5222BT1G qualified for automotive applications?
Yes, SZMMSZ5222BT1G is AEC−Q101 qualified and PPAP capable, as confirmed in the official onsemi datasheet. The "SZ" prefix explicitly denotes automotive-grade variants meeting stringent reliability, traceability, and process control requirements. This makes SZMMSZ5222BT1G appropriate for engine control, body electronics, and ADAS subsystems where automotive qualification is mandatory.
What is the maximum power dissipation for SZMMSZ5222BT1G and how does it derate with temperature?
SZMMSZ5222BT1G is rated for 500 mW total power dissipation on FR−5 board at lead temperature (TL) = 75°C, derating linearly at 6.7 mW/°C above that point. Its junction-to-lead thermal resistance is 150 °C/W, meaning a 100 mW load raises the junction temperature ~15°C above lead temperature. This derating behavior ensures safe operation in thermally demanding environments like under-hood automotive locations.
What packaging and marking information applies to SZMMSZ5222BT1G?
SZMMSZ5222BT1G is supplied in Pb−free SOD−123 package (Case 425, Style 1), with tape-and-reel shipping (3,000 units/reel). Its marking code is "C2", visible on the cathode-banded side. The "G" suffix confirms RoHS compliance, and the device meets UL 94 V−0 flammability rating. Polarity is unambiguously indicated by the cathode band, critical for correct orientation during automated assembly.
How does the Zener impedance of SZMMSZ5222BT1G affect its regulation performance?
SZMMSZ5222BT1G has a maximum Zener impedance (ZZT) of 1250 Ω at IZT = 20 mA, measured with 1 kHz AC signal at 0.1×DC current. This value directly impacts output voltage stability: for a 1 mA load step, the resulting voltage shift is ≤1.25 V. Lower ZZT would improve regulation, but 1250 Ω is well-suited for medium-current references where precision is balanced against cost and size constraints in the SZMMSZ5222BT1G design.
SZMMSZ5222BT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZMMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 2.5 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 1 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
SZMMSZ5222BT1G FAQ
1.How can I place an order for SZMMSZ5222BT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5222BT1G 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 SZMMSZ5222BT1G reliable?
The price and inventory of SZMMSZ5222BT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5222BT1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ5222BT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5222BT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5222BT1G?
SZMMSZ5222BT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5222BT1G 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 SZMMSZ5222BT1G?
For technical support, including SZMMSZ5222BT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5222BT1G requirements.
6.How does Aetrix verify that SZMMSZ5222BT1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5222BT1G 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 SZMMSZ5222BT1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ5222BT1G?
All SZMMSZ5222BT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5222BT1G, 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 SZMMSZ5222BT1G part is unused and in its original packaging.
Return procedure for SZMMSZ5222BT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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