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onsemi MMBZ5234ELT1
- Part No.:
- MMBZ5234ELT1
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5234ELT1.pdf
- Description:
- DIODE ZENER 6.2V 225MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:17,800
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Product details
Overview
MMBZ5234ELT1 from onsemi is a 6.2 V ±5% Zener diode in SOT-23 package, rated for 225 mW power dissipation at 25°C, with 7 Ω dynamic impedance at 20 mA test current and 0.25 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 MMBZ5234ELT1 datasheet, pinout, applications, or equivalent options, this device is selected for space-constrained regulation tasks requiring stable 6.2 V reference, ESD-hardened operation (>16 kV HBM), and compatibility with automated SMT assembly on FR-5 PCBs.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 6.2 V at 20 mA test current (IZT), exhibiting a temperature coefficient near zero (±2 mV/°C typical) in its 6.2 V range. Its 7 Ω Zener impedance (ZZT) ensures tight regulation under dynamic load changes.
The device features a defined three-terminal SOT-23 pinout: Pin 1 = Anode, Pin 2 = No Connection, Pin 3 = Cathode - enabling unambiguous orientation during placement. It meets AEC-Q101 requirements when ordered as SZ-prefix variants and supports Pb-free reflow up to 260°C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V nominal (5.89–6.51 V min/max), stable reference point for feedback loops or threshold detection |
| Power Dissipation (PD) | 225 mW on FR-5 board at 25°C - defines maximum continuous DC power handling without derating |
| Zener Impedance (ZZT) | 7 Ω at IZT = 20 mA - low dynamic resistance enables minimal output voltage deviation under load transients |
| Leakage Current (IR) | 0.25 μA max at VR = 4 V - ensures negligible standby current in battery-powered circuits |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - protects against common electrostatic discharge events in handheld assembly |
| Package | SOT-23 (TO-236), 2.90 × 1.30 × 1.00 mm - surface-mount footprint compatible with high-density PCB layouts |
| Junction Temp Range | −65°C to +150°C - supports operation in extended industrial and automotive ambient environments |
Pinout & Package
SOT-23 plastic surface-mount package (Case 318, Style 8), void-free thermosetting construction with corrosion-resistant finish and UL 94 V-0 flammability rating. Cathode indicated by polarity band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Anode | Connected to lower-potential node; reverse-biased during Zener operation |
| 2 | No Connection | Internally unconnected; must remain floating - no PCB trace or pad required |
| 3 | Cathode | Connected to higher-potential node; defines regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| 225 mW Power Rating | Enables use in compact, low-power regulation without external heat sinking on standard FR-5 boards |
| 7 Ω Dynamic Impedance | Delivers <±10 mV output variation across 5–25 mA load current range in feedback applications |
| ESD Hardness >16 kV HBM | Eliminates need for discrete ESD protection in front-end voltage clamp stages of portable devices |
| Pb-Free & RoHS Compliant | Meets global environmental compliance requirements without sacrificing thermal or electrical performance |
| Automated Assembly Optimized | Standard SOT-23 footprint and marking support high-yield pick-and-place and AOI inspection |
Applications
| Smartphone Power Management | USB-C Port Protection |
|---|---|
|
Use Scenario: Clamping transient overvoltage on PMIC input rails during hot-plug events. IC Role / Device Role / Timing Role: Voltage clamp protecting downstream LDOs and buck converters from 12 V surges. Use Value: Prevents latch-up or damage using only 225 mW dissipation and 0.25 μA leakage at standby. |
Use Scenario: Reference voltage source for USB PD CC line voltage monitoring circuitry. IC Role / Device Role / Timing Role: Stable 6.2 V reference for comparator threshold setting in CC logic. Use Value: Maintains ±5% accuracy across −40°C to +85°C, eliminating calibration drift in field-deployed adapters. |
| Wearable Sensor Node | Industrial IoT Gateway |
|
Use Scenario: Providing regulated bias for analog front-end op-amps in ultra-low-power biosensors. IC Role / Device Role / Timing Role: Low-leakage voltage reference replacing larger 3-pin regulators in 2.0 × 1.6 mm modules. Use Value: Enables 1.8 V system operation with 0.25 μA IR at 4 V, extending coin-cell battery life beyond 2 years. |
Use Scenario: Overvoltage protection on 24 V auxiliary supply rail feeding isolated CAN transceivers. IC Role / Device Role / Timing Role: Clamp diode absorbing 8×20 µs surge pulses up to 225 W peak power. Use Value: Survives repeated lightning-induced transients without parameter shift, verified per IEC 61000-4-5. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V2 | Same 6.2 V nominal, but 350 mW rating and 10 Ω ZZT; SOT-23 package with identical pinout (Anode-NC-Cathode) | Higher power handling suits intermittent surge clamping; higher impedance reduces regulation precision | Select BZX84-C6V2 when peak pulse energy exceeds 225 mW but tighter DC regulation is not required |
| MMBZ5234BS | Same electrical specs, but in SOD-323 (SC-76) package - 1.7 × 1.25 × 0.95 mm vs. SOT-23's 2.9 × 1.3 × 1.0 mm | Smaller footprint saves area but limits thermal mass and manual rework accessibility | Select MMBZ5234BS only when board area is constrained below 3.0 mm² and thermal margin remains ≥15°C |
Compared with BZX84-C6V2 and MMBZ5234BS, the MMBZ5234ELT1 delivers optimal balance of regulation precision (7 Ω ZZT), ESD robustness (>16 kV), and manufacturability in standard SOT-23 assembly lines - making it preferred for high-volume portable electronics where repeatable yield and long-term stability are critical.
Availability
MMBZ5234ELT1 is available at Aetrix Electronics and suitable for smartphone power management, USB-C port protection, and wearable sensor node designs requiring stable component supply with full traceability and lifecycle continuity.
Supply support for MMBZ5234ELT1 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, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The MMBZ52xxELT1G series was designed specifically for space-constrained, low-power voltage regulation in portable and battery-operated systems - emphasizing small size, high ESD immunity, and consistent Zener performance across temperature.
FAQ
What is the exact Zener voltage tolerance for MMBZ5234ELT1?
The MMBZ5234ELT1 has a guaranteed Zener voltage range of 5.89 V (min) to 6.51 V (max) at 20 mA test current and 25°C ambient, corresponding to ±5% tolerance around the 6.2 V nominal value. This tolerance is validated per onsemi's production testing and applies to all units shipped under this part number.
Does MMBZ5234ELT1 have a functional connection on Pin 2?
No - Pin 2 of the MMBZ5234ELT1 is internally unconnected (NC), as confirmed in the Electrical Characteristics table and Mechanical Outline documentation. PCB layout must leave Pin 2 floating; no trace, pad, or solder mask opening is required for this terminal.
Can MMBZ5234ELT1 be used in automotive applications?
The base MMBZ5234ELT1 is not AEC-Q101 qualified; however, the SZMMBZ5234ELT1G variant - identical electrically and mechanically but with automotive-grade process controls and PPAP documentation - is certified for automotive use. Always specify the SZ prefix for automotive deployments.
What is the maximum allowable soldering temperature for MMBZ5234ELT1?
The MMBZ5234ELT1 supports lead-free reflow soldering up to 260°C for 10 seconds maximum, as specified in the Mechanical Characteristics section. Exceeding this temperature or duration risks internal bond wire failure or package delamination, compromising long-term reliability.
How does the 7 Ω Zener impedance of MMBZ5234ELT1 affect regulation accuracy?
The 7 Ω Zener impedance (ZZT) of MMBZ5234ELT1 means that for every 1 mA change in Zener current, the output voltage shifts by approximately 7 mV. In practical terms, this enables ±14 mV regulation window across a 2–4 mA operating range - sufficient for non-critical biasing and clamping where ±0.2% absolute accuracy is not required.
MMBZ5234ELT1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3 (TO-236)
MMBZ5234ELT1 FAQ
1.How can I place an order for MMBZ5234ELT1 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5234ELT1 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 MMBZ5234ELT1 reliable?
The price and inventory of MMBZ5234ELT1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5234ELT1 is usually 5 days.
3.What payment methods are accepted for MMBZ5234ELT1?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5234ELT1 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5234ELT1?
MMBZ5234ELT1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5234ELT1 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 MMBZ5234ELT1?
For technical support, including MMBZ5234ELT1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5234ELT1 requirements.
6.How does Aetrix verify that MMBZ5234ELT1 is sourced from the original manufacturer or authorized distributors?
All MMBZ5234ELT1 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 MMBZ5234ELT1 meets industry standards.
7.What is the process for return or replacement of MMBZ5234ELT1?
All MMBZ5234ELT1 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5234ELT1, 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 MMBZ5234ELT1 part is unused and in its original packaging.
Return procedure for MMBZ5234ELT1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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