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onsemi SZMMBZ5226BLT1G
- Part No.:
- SZMMBZ5226BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5226BLT1G.pdf
- Description:
- DIODE ZENER 3.3V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:14,118
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Product details
Overview
SZMMBZ5226BLT1G from onsemi is an automotive-grade Zener diode in SOT-23 package, providing precise 3.3 V ±4.7% reverse breakdown regulation at 20 mA test current, with 225 mW power dissipation on FR-5 board and 1600 Ω dynamic impedance at IZT. It serves as a voltage reference or overvoltage clamp in low-power portable electronics such as battery management circuits and sensor signal conditioning stages.
For engineers reviewing the SZMMBZ5226BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include its AEC-Q101 qualification, 25 μA leakage at 1 V reverse bias, 0.9 V forward voltage at 10 mA, ESD rating >16 kV HBM, and cathode-anode polarity marking for unambiguous PCB layout.
Technical Context
This device operates as a two-terminal voltage reference using avalanche and Zener breakdown mechanisms depending on nominal voltage - for SZMMBZ5226BLT1G (3.3 V), Zener conduction dominates. Its thermal resistance of 556 °C/W on FR-5 board defines safe operating area under ambient temperature constraints.
The SOT-23 package supports automated placement and reflow soldering up to 260°C for 10 seconds. Pin 2 is internally unconnected, eliminating routing ambiguity; only pins 1 (anode) and 3 (cathode) participate in circuit operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.3 V nominal, 3.13–3.47 V range at 20 mA - ensures stable reference within ±4.7% tolerance for precision biasing |
| Power Dissipation (PD) | 225 mW on FR-5 board at 25°C - defines maximum continuous DC power before thermal derating begins |
| Zener Impedance (ZZT) | 28 Ω max at 20 mA - low dynamic impedance maintains regulation stability under varying load currents |
| Reverse Leakage (IR) | 25 μA max at 1 V reverse bias - minimal standby current preserves battery life in always-on circuits |
| Forward Voltage (VF) | 0.9 V max at 10 mA - enables predictable forward conduction for dual-purpose protection/reference use |
| ESD Rating | Class 3 (>16 kV HBM) - withstands electrostatic discharge during handling and assembly without parameter shift |
| AEC-Q101 Qualified | Validated for automotive applications - meets stress testing requirements for temperature cycling, humidity, and mechanical shock |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 × 1.30 × 1.00 mm, void-free thermosetting plastic case with corrosion-resistant finish; polarity band denotes cathode terminal.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; carries forward current when used as rectifier |
| 2 | No Connection | Internally isolated - must remain unconnected on PCB; no routing or thermal pad required |
| 3 | Cathode | Connected to higher-potential node in reverse-bias regulation; marked by polarity band on package body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood and infotainment systems requiring extended temperature and reliability compliance |
| 225 mW FR-5 power rating | Enables compact voltage clamping in space-constrained layouts without external heatsinking |
| 16 kV HBM ESD immunity | Eliminates need for external ESD protection in handheld and wearable designs |
| Pb-free, RoHS-compliant construction | Meets global environmental regulations and supports lead-free reflow profiles up to 260°C |
| 3.3 V Zener voltage with tight tolerance | Provides accurate reference for 3.3 V logic rail monitoring, ADC reference scaling, and LDO feedback networks |
Applications
| Battery Voltage Monitor | Low-Power Sensor Interface |
|---|---|
Use Scenario: Monitoring Li-ion cell voltage in portable medical devices to prevent overcharge/overdischarge. IC Role / Device Role / Timing Role: Zener reference for comparator input threshold setting. Use Value: Tight 3.3 V tolerance ensures ±1% voltage detection accuracy across temperature, enabling reliable battery protection. |
Use Scenario: Providing stable bias voltage to MEMS accelerometer analog front-end in IoT edge nodes. IC Role / Device Role / Timing Role: Low-leakage voltage reference for sensor excitation and signal conditioning. Use Value: 25 μA max leakage at 1 V reverse bias minimizes quiescent current draw, extending battery life beyond 5 years. |
| USB-C Port Protection | Automotive CAN Transceiver Bias |
Use Scenario: Clamping transient surges on USB-C VBUS line during hot-plug events. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp limiting peak voltage to 3.47 V. Use Value: 28 Ω ZZT ensures rapid voltage stabilization during 100 ns transients, preventing downstream IC damage. |
Use Scenario: Supplying regulated 3.3 V bias to CAN FD transceiver logic interface in ADAS control units. IC Role / Device Role / Timing Role: AEC-Q101-qualified voltage reference for noise-sensitive digital I/O rails. Use Value: Automotive qualification guarantees operation from −40°C to +125°C junction temperature without parameter drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5226BLT1G | Same electrical specs but not AEC-Q101 qualified; no automotive traceability or PPAP support | Limited to commercial-grade consumer electronics; unsuitable for automotive production | Select when cost sensitivity outweighs automotive compliance requirements |
| SZMMBZ5225BLT1G | Lower nominal Zener voltage (3.0 V), tighter 2.85–3.15 V range, same package and power rating | Better suited for 3.0 V system references or margin testing where 3.3 V headroom is excessive | Choose for designs requiring lower regulation voltage while retaining AEC-Q101 qualification |
Compared with MMBZ5226BLT1G, SZMMBZ5226BLT1G adds automotive qualification and process controls without sacrificing electrical performance; compared with SZMMBZ5225BLT1G, it provides higher reference voltage headroom essential for 3.3 V rail supervision and noise margin.
Availability
SZMMBZ5226BLT1G is available at Aetrix Electronics and suitable for battery management systems, automotive sensor modules, and portable medical devices requiring stable component supply with full automotive traceability and long-term lifecycle assurance.
Supply support for SZMMBZ5226BLT1G 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 specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
SZMMBZ52xxBLT1G series targets high-reliability automotive and industrial applications needing compact, qualified Zener regulation - designed specifically to replace through-hole Zeners in space-constrained, safety-critical environments.
FAQ
What is the Zener voltage tolerance of SZMMBZ5226BLT1G?
The SZMMBZ5226BLT1G has a nominal Zener voltage of 3.3 V with a guaranteed range of 3.13 V to 3.47 V at 20 mA test current, corresponding to ±4.7% tolerance. This specification is validated per onsemi's Electrical Characteristics table and applies across the full operating temperature range of −65°C to +150°C junction temperature.
Is SZMMBZ5226BLT1G pin-compatible with MMBZ5226BLT1G?
Yes, SZMMBZ5226BLT1G shares identical SOT-23 pinout (Pin 1: Anode, Pin 2: NC, Pin 3: Cathode), mechanical dimensions, and soldering profile with MMBZ5226BLT1G. However, SZMMBZ5226BLT1G includes additional automotive-specific process controls and AEC-Q101 qualification - no PCB changes are needed for drop-in replacement in qualified designs.
What is the maximum reverse leakage current for SZMMBZ5226BLT1G?
The maximum reverse leakage current for SZMMBZ5226BLT1G is 25 μA at 1 V reverse bias and 25°C ambient temperature, as specified in the Electrical Characteristics table. This low leakage supports ultra-low-power applications such as battery-backed real-time clocks and always-on sensor wake-up circuits.
Does SZMMBZ5226BLT1G support lead-free reflow soldering?
Yes, SZMMBZ5226BLT1G is Pb-free, halogen-free, and RoHS-compliant, rated for lead-free reflow soldering at 260°C for 10 seconds. Its thermosetting plastic case and corrosion-resistant finish ensure robustness during standard JEDEC J-STD-020-compliant reflow profiles.
How does the Zener impedance of SZMMBZ5226BLT1G affect regulation stability?
SZMMBZ5226BLT1G exhibits a maximum Zener impedance of 28 Ω at 20 mA test current, ensuring minimal output voltage variation under dynamic load changes. This low ZZT value directly improves regulation accuracy in applications like ADC reference buffers and LDO feedback networks where load current fluctuates.
SZMMBZ5226BLT1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.3 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 28 Ohms
- Current - Reverse Leakage @ Vr:
- 25 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
SZMMBZ5226BLT1G FAQ
1.How can I place an order for SZMMBZ5226BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5226BLT1G 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 SZMMBZ5226BLT1G reliable?
The price and inventory of SZMMBZ5226BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5226BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5226BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5226BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5226BLT1G?
SZMMBZ5226BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5226BLT1G 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 SZMMBZ5226BLT1G?
For technical support, including SZMMBZ5226BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5226BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5226BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5226BLT1G 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 SZMMBZ5226BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5226BLT1G?
All SZMMBZ5226BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5226BLT1G, 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 SZMMBZ5226BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5226BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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