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onsemi SZMMBZ5228BLT1G
- Part No.:
- SZMMBZ5228BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5228BLT1G.pdf
- Description:
- DIODE ZENER 3.9V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:11,990
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Product details
Overview
SZMMBZ5228BLT1G from onsemi is a 3.9 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 23 Ω dynamic impedance at 20 mA test current and 10 μA reverse leakage at 1 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZMMBZ5228BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance, thermal resistance (556 °C/W), ESD rating (>16 kV HBM), AEC-Q101 qualification, and SOT-23 footprint compatibility for high-density PCB layouts.
Technical Context
This device operates in reverse-biased Zener breakdown mode to maintain stable voltage regulation across varying load currents. Its 3.9 V nominal Zener voltage exhibits low temperature coefficient near zero crossing, enabling stable reference performance over −65°C to +150°C junction temperature range.
The SOT-23 package features a defined pinout (Pin 1: Anode, Pin 2: No Connection, Pin 3: Cathode) and supports automated placement. With 225 mW power rating on FR-5 board and 300 mW on alumina substrate, it balances thermal performance and miniaturization for space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.70 V min / 3.90 V nom / 4.10 V max @ IZT = 20 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 225 mW on FR-5 board @ TA = 25°C - sets maximum continuous power handling without derating |
| Zener Impedance (ZZT) | 23 Ω max @ IZT = 20 mA - determines voltage regulation stiffness under dynamic load changes |
| Reverse Leakage (IR) | 10 μA max @ VR = 1 V - specifies off-state current that impacts standby power in clamping applications |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - ensures robustness against electrostatic discharge during handling and assembly |
| Junction Temp Range | −65°C to +150°C - enables operation in automotive under-hood and industrial environments |
| AEC-Q101 Qualified | Yes - confirms reliability validation for automotive electronic systems requiring stress-tested components |
Pinout & Package
Package: SOT-23 (TO-236), 2.90 mm × 1.30 mm × 1.00 mm body, Pb-free, RoHS compliant, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node in reverse-bias configuration; required for proper Zener conduction path |
| Pin 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad should tie to this terminal |
| Pin 3 | Cathode | Connected to higher-potential node; polarity band on package aligns with this pin for visual orientation |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating on FR-5 Board | Enables use in compact consumer PCBs without forced cooling or thermal relief pads beyond standard layout |
| ESD Robustness >16 kV HBM | Reduces need for external ESD protection in handheld device front-end circuits |
| AEC-Q101 Qualification | Validates suitability for automotive infotainment, body control, and ADAS subsystems without additional qualification effort |
| SOT-23 Surface-Mount Package | Supports high-speed pick-and-place assembly and achieves <1.7 mm² board area occupancy |
| Pb-Free, Halogen-Free, RoHS Compliant | Meets global environmental compliance requirements for export and OEM manufacturing programs |
Applications
| Smartphone Power Rail Clamp | Automotive Cabin Sensor Reference |
|---|---|
Use Scenario: Clamping transient spikes on 3.3 V I/O rails during hot-plug or ESD events in smartphone mainboard design. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy away from sensitive logic ICs. Use Value: Prevents latch-up or damage to baseband processor GPIOs using only 3.9 V regulation threshold and 23 Ω dynamic impedance for fast response. |
Use Scenario: Providing stable 3.9 V reference for analog signal conditioning in cabin temperature/humidity sensors. IC Role / Device Role / Timing Role: Precision voltage reference source with <±5% tolerance and low tempco for ADC biasing. Use Value: Maintains sensor accuracy across −40°C to +125°C ambient due to AEC-Q101 validation and wide junction temperature range. |
| Wearable Battery Monitor | Industrial IoT Node Voltage Supervisor |
Use Scenario: Monitoring Li-ion cell voltage via resistive divider with Zener-clamped input to microcontroller ADC. IC Role / Device Role / Timing Role: Overvoltage protection element limiting divider output to safe 3.9 V level before ADC sampling. Use Value: Eliminates need for active supervisor IC; leverages 10 μA leakage at 1 V to minimize quiescent current drain in battery-powered mode. |
Use Scenario: Detecting brown-out conditions on 3.3 V supply rail in edge-node controllers deployed in factory automation. IC Role / Device Role / Timing Role: Passive reset threshold detector interfaced with microcontroller's wake-up interrupt pin. Use Value: Enables reliable power-fail detection using simple resistor-Zener network, validated for long-term stability per AEC-Q101 life testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5228BLT1G | Same Zener voltage (3.9 V), identical SOT-23 pinout, but not AEC-Q101 qualified; 225 mW rating unchanged | Targeted at commercial-grade portable electronics, not automotive or mission-critical industrial use | Select when AEC-Q101 compliance is unnecessary and cost sensitivity outweighs automotive qualification needs |
| SZMMBZ5229BLT1G | Higher nominal Zener voltage (4.3 V), same package and AEC-Q101 qualification; otherwise identical electrical specs | Used where system requires tighter margin above 3.3 V rail or different clamping threshold | Choose when circuit design mandates 4.3 V regulation instead of 3.9 V - no layout change needed due to identical footprint |
Compared with MMBZ5228BLT1G, SZMMBZ5228BLT1G adds automotive qualification without sacrificing power or impedance performance; compared with SZMMBZ5229BLT1G, it provides a lower, more common 3.9 V reference point while retaining full AEC-Q101 validation and thermal capability.
Availability
SZMMBZ5228BLT1G is available at Aetrix Electronics and suitable for smartphone power rail clamping, automotive cabin sensor references, wearable battery monitoring, and industrial IoT node voltage supervision requiring stable component supply and automotive-grade reliability.
Supply support for SZMMBZ5228BLT1G 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 manufacturer specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
SZMMBZ5228BLT1G belongs to the SZMMBZ52xxBLT1G series of AEC-Q101-qualified Zener diodes designed specifically for automotive electronics and other high-reliability applications demanding site-controlled manufacturing and PPAP documentation.
FAQ
What is the Zener voltage tolerance of SZMMBZ5228BLT1G?
The SZMMBZ5228BLT1G has a Zener voltage tolerance of ±5% around its nominal 3.9 V value, meaning the actual measured VZ falls between 3.70 V and 4.10 V when tested at IZT = 20 mA and TA = 25°C. This tolerance is confirmed in the Electrical Characteristics table on page 3 of the official onsemi datasheet for SZMMBZ5228BLT1G.
Is SZMMBZ5228BLT1G pin-compatible with MMBZ5228BLT1G?
Yes, SZMMBZ5228BLT1G shares identical pinout (Pin 1: Anode, Pin 2: NC, Pin 3: Cathode) and SOT-23 mechanical dimensions with MMBZ5228BLT1G. Both devices use Style 8 marking diagram and require no PCB layout changes when substituting one for the other, though only SZMMBZ5228BLT1G carries AEC-Q101 qualification.
What is the maximum power dissipation of SZMMBZ5228BLT1G on an FR-5 board?
The maximum power dissipation of SZMMBZ5228BLT1G on an FR-5 board is 225 mW at ambient temperature (TA) of 25°C, derating linearly by 1.8 mW/°C above that temperature. This rating is specified in the Maximum Ratings table on page 1 of the onsemi datasheet for SZMMBZ5228BLT1G.
Does SZMMBZ5228BLT1G have automotive qualification?
Yes, SZMMBZ5228BLT1G is AEC-Q101 qualified and PPAP capable, as explicitly stated in the Features section of the onsemi datasheet. The "SZ" prefix denotes compliance with automotive-specific site and process controls, distinguishing it from the commercial-grade MMBZ5228BLT1G variant.
What is the reverse leakage current specification for SZMMBZ5228BLT1G?
The reverse leakage current (IR) for SZMMBZ5228BLT1G is specified as 10 μA maximum at VR = 1 V and TA = 25°C. This parameter is listed in the Electrical Characteristics table on page 3 of the official onsemi datasheet for SZMMBZ5228BLT1G and directly impacts standby power consumption in clamping applications.
SZMMBZ5228BLT1G 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):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 23 Ohms
- Current - Reverse Leakage @ Vr:
- 10 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)
SZMMBZ5228BLT1G FAQ
1.How can I place an order for SZMMBZ5228BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5228BLT1G 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 SZMMBZ5228BLT1G reliable?
The price and inventory of SZMMBZ5228BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5228BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5228BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5228BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5228BLT1G?
SZMMBZ5228BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5228BLT1G 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 SZMMBZ5228BLT1G?
For technical support, including SZMMBZ5228BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5228BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5228BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5228BLT1G 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 SZMMBZ5228BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5228BLT1G?
All SZMMBZ5228BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5228BLT1G, 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 SZMMBZ5228BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5228BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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