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onsemi SZMMSZ5225BT1G
- Part No.:
- SZMMSZ5225BT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
SZMMSZ5225BT1G.pdf
- Description:
- DIODE ZENER 3V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:16,240
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Product details
Overview
SZMMSZ5225BT1G from onsemi is a 3.0 V ±5% Zener diode in SOD−123 package, rated for 500 mW power dissipation at TL = 75°C, with 29 Ω dynamic impedance at 20 mA test current and 0.25 μA leakage current at 50 V reverse bias - used for precision voltage reference and overvoltage protection in low-power analog sensor interfaces.
For engineers reviewing the SZMMSZ5225BT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal equilibrium specification, junction-to-lead thermal resistance (150 °C/W), and AEC−Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage regulator diode, maintaining stable reverse breakdown at nominal 3.0 V with specified test current IZT = 20 mA under thermal equilibrium conditions (TL = 30°C ±1°C). Its Zener impedance is characterized at both IZT (29 Ω) and IZK (1600 Ω), supporting use in low-noise reference circuits where dynamic impedance impacts regulation accuracy.
The SZMMSZ5225BT1G features an ESD rating of Class 3 (>16 kV HBM), Pb−free construction, and UL 94 V−0 flammability compliance. It is qualified to AEC−Q101 and supports automotive applications requiring controlled change management via the "SZ" prefix designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.85–3.15 V @ IZT = 20 mA - defines tight regulation window for 3.0 V reference design |
| Power Dissipation (PD) | 500 mW on FR−5 board @ TL = 75°C - sets maximum continuous operating power under standard PCB thermal conditions |
| Zener Impedance (ZZT) | 29 Ω @ IZT = 20 mA - determines AC regulation stability under small-signal load variations |
| Leakage Current (IR) | 0.25 μA @ VR = 50 V - ensures minimal parasitic current draw in high-impedance bias networks |
| Junction Temp Range | −55°C to +150°C - enables operation in extended-temperature automotive and industrial environments |
| Thermal Resistance (RJL) | 150 °C/W - quantifies heat transfer efficiency from junction to lead, critical for thermal design margining |
Pinout & Package
SOD−123 surface-mount plastic package (1.60 × 2.69 × 1.16 mm), void-free thermosetting case with cathode band marking and corrosion-resistant solderable finish. Maximum solder temperature: 260°C for 10 seconds.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Cathode) | Reverse-biased terminal | Connected to higher potential node in Zener regulation configuration; polarity band identifies this terminal |
| 2 (Anode) | Forward-biased terminal | Connected to lower potential (e.g., ground or return path); forward voltage ≤0.95 V @ 10 mA confirms low-loss conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC−Q101 Qualified | Validated for automotive electronics per stress test requirements - supports PPAP-compliant production |
| ESD Robustness | Class 3 (>16 kV HBM) - eliminates need for external ESD protection in many sensor interface designs |
| Pb−Free Construction | RoHS-compliant materials and finish - meets global environmental compliance without derating |
| Thermal Equilibrium Spec | Zener voltage measured at TL = 30°C ±1°C - ensures repeatable, traceable calibration across production lots |
Applications
| Automotive Cabin Sensors | Industrial Analog Signal Conditioning |
|---|---|
Use Scenario: Providing stable 3.0 V reference for MEMS pressure and humidity sensors in HVAC control modules. IC Role / Device Role / Timing Role: Two-terminal Zener voltage reference establishing precise bias point for ADC input scaling and sensor excitation. Use Value: Tight ±5% tolerance and low 29 Ω ZZT minimize reference drift and noise coupling into 12-bit sensor signal chains. |
Use Scenario: Overvoltage clamp protecting 3.3 V rail inputs of PLC analog input cards from transient surges. IC Role / Device Role / Timing Role: Passive shunt regulator absorbing fault energy during 100 ns–1 ms transients up to 50 V. Use Value: 0.25 μA leakage at 50 V ensures no loading of high-Z input dividers; 150 °C/W RJL enables predictable thermal response under surge. |
| Medical Wearable Battery Monitoring | Consumer IoT Power Sequencing |
Use Scenario: Reference generation for lithium battery cell voltage measurement in compact wearable health monitors. IC Role / Device Role / Timing Role: Low-power Zener reference feeding comparator hysteresis thresholds in battery protection circuitry. Use Value: −55°C to +150°C operating range accommodates body-worn thermal cycling; SOD−123 footprint minimizes board area. |
Use Scenario: Enabling controlled power-up sequencing by clamping enable pins to 3.0 V during LDO ramp-up in smart home hubs. IC Role / Device Role / Timing Role: Voltage-level translator and transient suppressor for GPIO-controlled power rails. Use Value: Cathode-band polarity marking ensures correct orientation in automated assembly; 500 mW rating supports brief inrush current absorption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMSZ5225BT1G | No "SZ" prefix; not AEC−Q101 qualified; same electrical specs and SOD−123 package | Intended for commercial/industrial use only; lacks automotive change control and PPAP support | Select when automotive qualification is unnecessary and cost sensitivity outweighs long-term supply assurance |
| BZX84-C3V0LT1G | 3.0 V ±5%, 350 mW rating, 30 Ω ZZT, SOT−23 package - smaller footprint but lower power and no AEC−Q101 | Used in space-constrained consumer devices; lacks thermal robustness for sustained 500 mW operation | Choose only if board area is critical and peak power remains below 350 mW; verify thermal margin on FR−4 |
Compared with MMSZ5225BT1G and BZX84-C3V0LT1G, the SZMMSZ5225BT1G uniquely combines automotive qualification, 500 mW power handling, and SOD−123 mechanical stability - making it the sole option for AEC−Q101–compliant designs requiring full thermal derating headroom.
Availability
SZMMSZ5225BT1G is available at Aetrix Electronics and suitable for automotive cabin sensors, industrial analog signal conditioning, medical wearable battery monitoring, and consumer IoT power sequencing requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SZMMSZ5225BT1G 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 Zener voltage regulator portfolio, designed specifically for precision voltage reference and overvoltage protection in space-constrained, high-reliability applications - especially where AEC−Q101 compliance and thermal equilibrium characterization are mandatory.
FAQ
What is the Zener voltage tolerance of SZMMSZ5225BT1G?
The SZMMSZ5225BT1G has a nominal Zener voltage of 3.0 V with a ±5% tolerance, meaning its guaranteed reverse breakdown voltage falls between 2.85 V and 3.15 V when tested at IZT = 20 mA under thermal equilibrium (TL = 30°C ±1°C). This tolerance is confirmed in the onsemi datasheet Table 3 for "B" suffix devices and applies directly to the SZMMSZ5225BT1G variant.
Is SZMMSZ5225BT1G qualified for automotive applications?
Yes, SZMMSZ5225BT1G is AEC−Q101 qualified and PPAP capable. The "SZ" prefix explicitly denotes automotive-grade manufacturing controls, site-specific change management, and stress testing per AEC−Q101 Rev D. This qualification is documented in the onsemi datasheet Features section and distinguishes it from the commercial-grade MMSZ5225BT1G.
What is the maximum power dissipation for SZMMSZ5225BT1G on a standard PCB?
SZMMSZ5225BT1G is rated for 500 mW total power dissipation on an FR−5 board at lead temperature (TL) = 75°C, with derating of 6.7 mW/°C above that temperature. This rating assumes the minimum recommended footprint and is validated per onsemi's thermal test methodology using infrared scanning - not ambient temperature derating.
Does SZMMSZ5225BT1G have ESD protection built-in?
Yes, SZMMSZ5225BT1G has an ESD rating of Class 3 (>16 kV) per the Human Body Model (HBM), as stated in the onsemi datasheet Features section. This level of robustness eliminates the need for external ESD components in many low-energy interface applications, including sensor bias networks and microcontroller GPIO protection.
What package type and dimensions does SZMMSZ5225BT1G use?
SZMMSZ5225BT1G uses the SOD−123 surface-mount package (Case 425, Style 1), measuring 1.60 mm × 2.69 mm × 1.16 mm. It features a cathode band marking, Pb−free finish, UL 94 V−0 flammability rating, and is optimized for automated board assembly - all confirmed in the Mechanical Characteristics and Package Dimensions sections of the onsemi datasheet.
SZMMSZ5225BT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- SZMMSZ52xxxT1G
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 29 Ohms
- Current - Reverse Leakage @ Vr:
- 50 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
SZMMSZ5225BT1G FAQ
1.How can I place an order for SZMMSZ5225BT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMSZ5225BT1G 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 SZMMSZ5225BT1G reliable?
The price and inventory of SZMMSZ5225BT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMSZ5225BT1G is usually 5 days.
3.What payment methods are accepted for SZMMSZ5225BT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMSZ5225BT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMSZ5225BT1G?
SZMMSZ5225BT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMSZ5225BT1G 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 SZMMSZ5225BT1G?
For technical support, including SZMMSZ5225BT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMSZ5225BT1G requirements.
6.How does Aetrix verify that SZMMSZ5225BT1G is sourced from the original manufacturer or authorized distributors?
All SZMMSZ5225BT1G 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 SZMMSZ5225BT1G meets industry standards.
7.What is the process for return or replacement of SZMMSZ5225BT1G?
All SZMMSZ5225BT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMSZ5225BT1G, 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 SZMMSZ5225BT1G part is unused and in its original packaging.
Return procedure for SZMMSZ5225BT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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