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onsemi SZMMBZ5227BLT1G
- Part No.:
- SZMMBZ5227BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5227BLT1G.pdf
- Description:
- DIODE ZENER 3.6V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:27,096
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Product details
Overview
SZMMBZ5227BLT1G from onsemi is a 3.6 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 24 Ω dynamic impedance at 20 mA test current and 15 μA reverse leakage at 1 V, used for precision voltage reference and overvoltage protection in portable power rails.
For engineers reviewing the SZMMBZ5227BLT1G datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (556 °C/W), ESD rating (>16 kV HBM), AEC-Q101 qualification, and SOT-23 footprint compatibility with high-density PCB layouts.
Technical Context
This device operates as a two-terminal voltage reference diode with cathode-anode polarity, designed for stable reverse-bias regulation under DC or low-frequency transient conditions. Its 3.6 V nominal Zener voltage exhibits a near-zero temperature coefficient in the 3–6 V range, minimizing drift across −65°C to +150°C operating junction temperature.
The SOT-23 package features a no-connect (NC) terminal (Pin 2), enabling mechanical stability without electrical function-distinct from dual-anode or dual-cathode variants. It supports automated placement and reflow soldering up to 260°C for 10 seconds, with UL 94 V-0 flammability rating and Pb-free, halogen-free construction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.42 V min / 3.6 V nom / 3.78 V max @ IZT = 20 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 225 mW @ TA = 25°C on FR-5 board - sets maximum continuous power handling before thermal derating begins |
| Zener Impedance (ZZT) | 24 Ω max @ IZT = 20 mA - determines regulation stiffness and output voltage variation under load changes |
| Reverse Leakage (IR) | 15 μA max @ VR = 1 V - specifies off-state current that affects standby power and signal integrity in high-impedance nodes |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - ensures robustness against electrostatic discharge during handling and assembly |
| Operating Temperature | −65°C to +150°C junction range - supports automotive under-hood and industrial ambient environments |
| AEC-Q101 Qualified | Yes - confirms reliability validation for automotive electronic systems per stress-test requirements |
Pinout & Package
SOT-23 (TO-236) surface-mount package, 2.90 mm × 1.30 mm × 1.00 mm body size, with cathode band marking and Pb-free finish. Thermal pad not present; no thermal slug.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node in reverse-bias configuration; carries full Zener current during regulation |
| 2 | No Connection | Internally unconnected terminal; provides mechanical support and alignment but no electrical function |
| 3 | Cathode | Connected to higher-potential node; marked by polarity band; referenced for voltage clamping and regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock |
| 225 mW Power Rating | Enables compact voltage regulation in space-constrained applications without external heat sinking |
| ESD >16 kV (HBM) | Reduces need for additional ESD protection circuitry in handheld and portable designs |
| Pb-Free, Halogen-Free | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 1 moisture sensitivity requirements |
| SOT-23 Footprint | Compatible with industry-standard pick-and-place equipment and reflow profiles for high-volume manufacturing |
Applications
| Smartphone Power Rail Protection | Automotive Body Control Module |
|---|---|
|
Use Scenario: Clamping transient overvoltage on 3.3 V I/O supply rail during hot-swap or ESD events. IC Role / Device Role / Timing Role: Zener voltage clamp placed between rail and ground, conducting only above 3.6 V threshold. Use Value: Limits voltage excursion to ≤3.78 V, protecting downstream 3.3 V logic ICs without adding series resistance or delay. |
Use Scenario: Providing stable 3.6 V reference for microcontroller ADC biasing in interior lighting control circuits. IC Role / Device Role / Timing Role: Precision shunt reference supplying low-current bias to analog front-end circuitry. Use Value: Delivers <±5% voltage accuracy across −40°C to +125°C ambient, meeting AEC-Q100 Grade 2 requirements. |
| USB-C Port Overvoltage Clamp | Industrial Sensor Signal Conditioning |
|
Use Scenario: Protecting USB-C CC line receiver from accidental 5 V misconnection or surge coupling. IC Role / Device Role / Timing Role: Fast-acting shunt clamp on CC detection line, activated within nanoseconds of overvoltage onset. Use Value: Withstands 15 μA leakage at 1 V, ensuring minimal impact on CC line pull-up/pull-down timing and enumeration. |
Use Scenario: Stabilizing excitation voltage for resistive bridge sensors in programmable logic controller (PLC) input modules. IC Role / Device Role / Timing Role: Low-drift Zener reference sourcing <1 mA to Wheatstone bridge, rejecting supply ripple. Use Value: Achieves <0.5% regulation error over 100 kHz bandwidth due to 24 Ω ZZT, improving sensor measurement resolution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MMBZ5227BLT1G | Same Zener voltage (3.6 V), identical SOT-23 pinout, but not AEC-Q101 qualified; 225 mW rating unchanged | Lacks automotive qualification; suitable for commercial portable electronics but not under-hood or safety-critical systems | Select when AEC-Q101 compliance is unnecessary and cost optimization is prioritized |
| SZMMBZ5226BLT1G | 3.3 V nominal Zener (3.13–3.47 V range), same package and power rating; 28 Ω ZZT vs. 24 Ω for SZMMBZ5227BLT1G | Lower clamping threshold; better suited for 3.0 V or 3.3 V rail protection where tighter margin below 3.6 V is required | Choose when system tolerance requires regulation at 3.3 V instead of 3.6 V, with acceptable 4 Ω higher impedance |
Compared with MMBZ5227BLT1G and SZMMBZ5226BLT1G, SZMMBZ5227BLT1G uniquely combines AEC-Q101 qualification, 3.6 V regulation, and lowest ZZT in its voltage tier-making it optimal for automotive and industrial applications demanding both reliability and precision.
Availability
SZMMBZ5227BLT1G is available at Aetrix Electronics and suitable for smartphone power management, automotive body electronics, USB-C interface protection, and industrial sensor signal conditioning requiring stable component supply and long-term lifecycle assurance.
Supply support for SZMMBZ5227BLT1G 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 silicon solutions for automotive, industrial, cloud, medical, and IoT applications, with core expertise in power management, analog, sensors, and connectivity.
SZMMBZ5227BLT1G belongs to the SZMMBZ52xxBLT1G automotive Zener regulator family, engineered specifically for AEC-Q101-compliant voltage reference and transient suppression in harsh-environment electronics.
FAQ
What is the Zener voltage tolerance of SZMMBZ5227BLT1G?
The SZMMBZ5227BLT1G has a Zener voltage tolerance of ±5% around its nominal 3.6 V value, resulting in a guaranteed range of 3.42 V to 3.78 V at 20 mA test current (IZT). This tolerance is specified at TA = 25°C and remains stable across its full −65°C to +150°C junction temperature range, making SZMMBZ5227BLT1G suitable for precision reference applications where tight voltage control is critical.
Is SZMMBZ5227BLT1G suitable for automotive applications?
Yes, SZMMBZ5227BLT1G is AEC-Q101 qualified and PPAP capable, confirming its suitability for automotive applications including body control modules, infotainment power supplies, and sensor interfaces. The "SZ" prefix denotes automotive-specific site and process controls, and the device meets rigorous stress-test requirements for temperature cycling, humidity, and mechanical shock-unlike the commercial-grade MMBZ5227BLT1G variant.
What is the thermal resistance of SZMMBZ5227BLT1G on FR-5 board?
The thermal resistance (RJA) of SZMMBZ5227BLT1G is 556 °C/W when mounted on an FR-5 board, meaning each watt of dissipated power raises the junction temperature by 556°C above ambient. At its rated 225 mW, this results in a ~125°C rise-well within its −65°C to +150°C junction limit when ambient stays below +25°C. Derating is required above 25°C at 1.8 mW/°C.
Does SZMMBZ5227BLT1G have a no-connect pin, and how is it used?
Yes, SZMMBZ5227BLT1G uses Style 8 pinout: Pin 1 = Anode, Pin 2 = No Connection (NC), Pin 3 = Cathode. Pin 2 is internally unconnected and serves only for mechanical alignment and board-level stability during automated assembly. It must not be soldered to any net or grounded, as doing so may compromise thermal performance or cause unintended parasitic paths in the SZMMBZ5227BLT1G layout.
What is the maximum reverse leakage current for SZMMBZ5227BLT1G?
The maximum reverse leakage current (IR) for SZMMBZ5227BLT1G is 15 μA at VR = 1 V and TA = 25°C. This low leakage ensures minimal quiescent current draw in battery-powered applications and preserves signal integrity in high-impedance sensing nodes. Leakage increases with temperature and reverse voltage but remains below 100 μA up to 3.0 V at 125°C, as confirmed in the device's typical characteristics curves.
SZMMBZ5227BLT1G 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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 24 Ohms
- Current - Reverse Leakage @ Vr:
- 15 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)
SZMMBZ5227BLT1G FAQ
1.How can I place an order for SZMMBZ5227BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5227BLT1G 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 SZMMBZ5227BLT1G reliable?
The price and inventory of SZMMBZ5227BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5227BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5227BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5227BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5227BLT1G?
SZMMBZ5227BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5227BLT1G 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 SZMMBZ5227BLT1G?
For technical support, including SZMMBZ5227BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5227BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5227BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5227BLT1G 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 SZMMBZ5227BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5227BLT1G?
All SZMMBZ5227BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5227BLT1G, 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 SZMMBZ5227BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5227BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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