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onsemi SZMMBZ5234BLT1G
- Part No.:
- SZMMBZ5234BLT1G
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
SZMMBZ5234BLT1G.pdf
- Description:
- DIODE ZENER 6.2V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:16,248
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Product details
Overview
SZMMBZ5234BLT1G from onsemi is a 6.2 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation on FR-5 board, with 7 Ω dynamic impedance at 20 mA test current and 5 μA leakage current at 4 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power portable electronics.
For engineers reviewing the SZMMBZ5234BLT1G 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 in space-constrained designs.
Technical Context
This device operates in reverse breakdown mode to maintain stable voltage across its cathode-anode terminals under varying load or input conditions. Its 6.2 V nominal Zener voltage exhibits low temperature coefficient near zero crossing, enabling stable regulation over −65°C to +150°C junction range.
The SOT-23 package features three terminals: anode (Pin 1), no-connect (Pin 2), and cathode (Pin 3), with polarity indicated by a band. It delivers Class 3 ESD robustness (>16 kV HBM) and complies with RoHS, halogen-free, and Pb-free requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V nominal, 5.89–6.51 V min–max at 20 mA - defines clamping/reference level accuracy |
| Power Dissipation (PD) | 225 mW on FR-5 board at 25°C - sets maximum continuous power handling in standard PCB layout |
| Zener Impedance (ZZT) | 7 Ω max at IZT = 20 mA - determines voltage regulation stiffness under dynamic load changes |
| Leakage Current (IR) | 5 μA max at VR = 4 V - ensures minimal standby current in undervoltage protection circuits |
| ESD Rating | Class 3 (>16 kV) per HBM - enables direct integration into handheld device front-end without external ESD protection |
| Junction Temp Range | −65°C to +150°C - supports operation in automotive under-hood and industrial ambient environments |
| AEC-Q101 Qualified | Yes - validates reliability for automotive electronics applications requiring stress-tested components |
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 indicates cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Connected to lower-potential node; current flows into cathode during Zener conduction |
| Pin 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| Pin 3 | Cathode | Connected to regulated/higher-potential node; marked by polarity band |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock |
| 225 mW FR-5 power rating | Enables use in compact battery-powered systems without heatsinking or derating penalties |
| ESD >16 kV (HBM) | Eliminates need for discrete ESD protection diodes in consumer interface lines |
| SZ prefix variant | Indicates dedicated automotive process flow, PPAP-capable manufacturing, and enhanced traceability |
| Pb-free / Halogen-free | Complies with global environmental directives and enables lead-free reflow soldering at 260°C/10s |
Applications
| USB Port Overvoltage Protection | Automotive Body Control Module Reference |
|---|---|
Use Scenario: Clamps transient surges on USB VBUS line during hot-plug or ESD events. IC Role / Device Role / Timing Role: Passive voltage clamp placed between VBUS and ground, conducting only above 6.2 V. Use Value: Prevents damage to downstream USB transceivers by limiting peak voltage to ≤6.51 V with <7 Ω dynamic impedance. |
Use Scenario: Provides stable 6.2 V reference for microcontroller ADC or sensor biasing in BCM modules. IC Role / Device Role / Timing Role: Precision shunt reference supplying low-current bias to analog subsystems. Use Value: Maintains ±5% voltage accuracy across −40°C to +125°C ambient with AEC-Q101 validated lifetime. |
| Smartphone Battery Monitoring Circuit | Industrial IoT Sensor Node Voltage Clamp |
Use Scenario: Regulates voltage for fuel gauge IC supply rail in Li-ion battery management path. IC Role / Device Role / Timing Role: Shunt regulator stabilizing 6.2 V rail feeding analog front-end circuitry. Use Value: Delivers 225 mW power handling in 2.9 × 1.3 mm footprint, minimizing PCB area in ultra-thin handset designs. |
Use Scenario: Protects RS-485 transceiver inputs from induced surges in factory-floor wiring. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp on data line, activated within nanoseconds of overvoltage event. Use Value: Leverages 5 μA leakage at 4 V to avoid signal distortion while clamping transients >6.2 V with Class 3 ESD immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V2LT1G | Same 6.2 V nominal, but 350 mW rating on FR-4 and higher ZZT (10 Ω) | Higher power handling suits higher-current regulation; less suitable for ultra-low-leakage designs | Select when >225 mW dissipation is needed; verify thermal layout for 350 mW |
| SZBZX84C6V2LT1G | AEC-Q101 qualified like SZMMBZ5234BLT1G, but uses BZX84 platform with 10 Ω ZZT and 10 μA IR | Broader automotive qualification history; slightly looser leakage spec impacts low-power sleep modes | Prefer for legacy BZX84-based designs requiring drop-in AEC-Q101 upgrade |
Compared with BZX84-C6V2LT1G and SZBZX84C6V2LT1G, SZMMBZ5234BLT1G offers tighter Zener voltage tolerance (±5% vs ±5% nominal but wider actual spread), lower dynamic impedance (7 Ω), and lower leakage (5 μA), making it optimal for precision low-power regulation where voltage stability and standby current are critical.
Availability
SZMMBZ5234BLT1G is available at Aetrix Electronics and suitable for automotive body control modules, smartphone power management, industrial sensor nodes, and USB interface protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SZMMBZ5234BLT1G 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 supplier of energy-efficient semiconductor solutions, specializing in automotive, industrial, cloud, and IoT applications.
SZMMBZ5234BLT1G belongs to the SZMMBZ52xxBLT1G series - a family of AEC-Q101-qualified Zener diodes engineered for automotive and high-reliability industrial systems demanding robust voltage regulation in miniature SOT-23 packages.
FAQ
What is the Zener voltage tolerance of SZMMBZ5234BLT1G?
The SZMMBZ5234BLT1G has a nominal Zener voltage of 6.2 V with a guaranteed range of 5.89 V to 6.51 V at 20 mA test current, corresponding to ±5% tolerance. This tight specification ensures predictable clamping behavior in precision voltage reference and overvoltage protection circuits where consistent thresholding is required.
Is SZMMBZ5234BLT1G suitable for automotive applications?
Yes, SZMMBZ5234BLT1G is AEC-Q101 qualified and PPAP capable, with manufacturing traceability and process controls specific to automotive requirements. Its −65°C to +150°C junction temperature range, Class 3 ESD rating, and SZ-prefix designation confirm suitability for under-hood and body electronics where reliability under thermal and electrical stress is mandatory.
What is the role of Pin 2 in SZMMBZ5234BLT1G?
Pin 2 of SZMMBZ5234BLT1G is a no-connect terminal - internally unconnected and electrically isolated. It must remain unconnected on the PCB; routing traces or placing solder pads to Pin 2 may cause assembly defects or unintended parasitic coupling. The functional terminals are only Pin 1 (anode) and Pin 3 (cathode).
How does the thermal resistance of SZMMBZ5234BLT1G affect its power handling?
SZMMBZ5234BLT1G has a junction-to-ambient thermal resistance of 556 °C/W on FR-5 board. At 25°C ambient, this limits usable power to 225 mW before exceeding the 150°C max junction temperature. For every 1°C rise in ambient, derating is 1.8 mW/°C - critical for thermal design in sealed enclosures or high-temperature environments.
What packaging options are available for SZMMBZ5234BLT1G?
SZMMBZ5234BLT1G is supplied in Pb-free SOT-23 tape-and-reel packaging, with 3,000 units per reel (order code suffix LT1G). It is not offered in 10,000-unit reels. The marking "8J" appears on the device body, and the "SZ" prefix confirms automotive-grade process control and traceability per onsemi's documentation.
SZMMBZ5234BLT1G 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):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 225 mW
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 4 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)
SZMMBZ5234BLT1G FAQ
1.How can I place an order for SZMMBZ5234BLT1G through Aetrix?
Please submit a Request for Quotation (RFQ) for SZMMBZ5234BLT1G 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 SZMMBZ5234BLT1G reliable?
The price and inventory of SZMMBZ5234BLT1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SZMMBZ5234BLT1G is usually 5 days.
3.What payment methods are accepted for SZMMBZ5234BLT1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SZMMBZ5234BLT1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SZMMBZ5234BLT1G?
SZMMBZ5234BLT1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SZMMBZ5234BLT1G 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 SZMMBZ5234BLT1G?
For technical support, including SZMMBZ5234BLT1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SZMMBZ5234BLT1G requirements.
6.How does Aetrix verify that SZMMBZ5234BLT1G is sourced from the original manufacturer or authorized distributors?
All SZMMBZ5234BLT1G 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 SZMMBZ5234BLT1G meets industry standards.
7.What is the process for return or replacement of SZMMBZ5234BLT1G?
All SZMMBZ5234BLT1G units undergo pre-shipment inspection (PSI). If there is an issue with SZMMBZ5234BLT1G, 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 SZMMBZ5234BLT1G part is unused and in its original packaging.
Return procedure for SZMMBZ5234BLT1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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