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Diodes Incorporated MMBZ5234B-7-F
- Part No.:
- MMBZ5234B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5234B-7-F.pdf
- Description:
- DIODE ZENER 6.2V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:19,207
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Product details
Overview
MMBZ5234B-7-F from Diodes Incorporated is a 6.2 V, 350 mW surface-mount Zener diode in SOT23 package, rated for 20 mA test current with 7 Ω dynamic impedance at 1 kHz and 5 µA reverse leakage at 4.0 V. It provides precision voltage regulation and overvoltage protection in low-power analog and digital supply rails.
For engineers reviewing the MMBZ5234B-7-F datasheet, MMBZ5234B-7-F pinout, MMBZ5234B-7-F application, or MMBZ5234B-7-F equivalent, this device is selected for stable reference generation, ESD clamp circuits, and power rail supervision where tight tolerance (±5%), low Zzt, and JEDEC-qualified reliability are required.
Technical Context
This Zener diode operates in reverse breakdown mode with a nominal Zener voltage of 6.2 V, specified at IZT = 20 mA and tested under short-pulse conditions to minimize self-heating. Its planar die construction ensures consistent voltage distribution and thermal stability across operating temperature range.
Designed for automated SMT assembly on FR-4 PCBs, it delivers 350 mW power dissipation with RθJA = 357 °C/W and supports operation from –65 °C to +150 °C. The matte tin-plated Alloy 42 leadframe ensures solderability per MIL-STD-202, Method 208.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.2 V nominal, 5.89–6.51 V min/max at IZT = 20 mA - defines regulated output voltage tolerance band for reference design |
| Zener Impedance (ZZT) | 7 Ω at f = 1 kHz, IZT = 20 mA - determines AC regulation error and ripple rejection capability |
| Power Dissipation (PD) | 350 mW on FR-4 PCB - sets maximum continuous DC/average power handling without derating |
| Reverse Leakage (IR) | 5 µA max at VR = 4.0 V - limits standby current in clamping or biasing applications |
| Thermal Resistance (RθJA) | 357 °C/W - enables thermal rise calculation for layout-dependent junction temperature estimation |
| Operating Temperature | –65 °C to +150 °C - qualifies use in extended industrial and automotive under-hood environments |
Pinout & Package
Package: SOT23 - 3-terminal plastic surface-mount package with standard leadframe geometry, 0.008 g mass, UL 94V-0 rated molding compound, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground point in shunt regulator | Connected to system ground or lower-potential node; establishes reference polarity for Zener operation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to input supply via series resistor; maintains stable 6.2 V relative to anode during reverse bias |
| Collector / Heat Sink (Pin 3) | Internal die substrate connection / thermal path | Electrically tied to cathode in this Zener structure; serves as primary thermal conduction path to PCB copper |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight VZ tolerance (±5%) and repeatable ZZT across production lots |
| 350 mW dissipation on FR-4 | Supports robust voltage clamping in 3.3 V/5 V logic rails without external heatsinking |
| Matte tin finish, Alloy 42 leadframe | Ensures reliable reflow soldering and long-term intermetallic stability in high-volume manufacturing |
| JEDEC-qualified high reliability | Validated for mission-critical functions in industrial control and automotive subsystems |
Applications
| Power Supply Reference | ESD Protection Clamp |
|---|---|
|
Use Scenario: Generating a stable 6.2 V reference for ADC biasing or op-amp feedback networks in battery-powered sensor nodes. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise DC offset independent of load current variation. Use Value: Maintains <±1% reference accuracy over –40 °C to +85 °C due to low ZZT and matched thermal coefficient. |
Use Scenario: Protecting USB data lines (D+/D−) against ±8 kV contact ESD per IEC 61000-4-2. IC Role / Device Role / Timing Role: Low-capacitance transient voltage suppressor clamping line voltage to safe levels during surge events. Use Value: Limits clamping voltage to ≤7.0 V at 1 A peak pulse, minimizing stress on downstream PHY ICs. |
| Microcontroller Reset Circuit | Overvoltage Monitor Input |
|
Use Scenario: Holding MCU reset pin low until main 5 V rail stabilizes above 4.5 V during power-up sequencing. IC Role / Device Role / Timing Role: Threshold-detecting element in simple RC-reset network with hysteresis. Use Value: Provides sharp turn-on at 6.2 V with <100 ns response time, enabling deterministic reset release timing. |
Use Scenario: Monitoring 12 V automotive accessory rail for overvoltage faults exceeding 13.5 V threshold. IC Role / Device Role / Timing Role: Precision voltage threshold detector feeding comparator input in fault-safety chain. Use Value: Delivers ±30 mV absolute accuracy at 25 °C, reducing false trip rate in harsh electrical environments. |
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 (Nexperia) | Same 6.2 V nominal, 300 mW PD, ZZT = 10 Ω - slightly higher impedance and lower power rating | Marginally reduced ripple rejection in precision references; suitable for general-purpose clamping | Select when cost sensitivity outweighs need for lowest ZZT or highest PD |
| MMBZ5234BS-7-F (Diodes Inc.) | SOT-323 package variant - identical electrical specs but smaller footprint and 250 mW PD on FR-4 | Preferred for ultra-compact layouts; requires tighter thermal management at full load | Choose for space-constrained designs where board area is prioritized over power headroom |
Compared with BZX84-C6V2 and MMBZ5234BS-7-F, MMBZ5234B-7-F offers superior thermal performance (350 mW vs. 300/250 mW) and lowest ZZT (7 Ω), making it optimal for high-stability references and repetitive surge clamping where long-term drift and AC regulation matter.
Availability
MMBZ5234B-7-F is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body electronics, and consumer power management systems requiring stable component supply and JEDEC-qualified reliability.
Supply support for MMBZ5234B-7-F 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This part belongs to the MMBZ52xxB Zener diode family, engineered for high-reliability surface-mount voltage regulation in space-constrained, thermally demanding applications across industrial, computing, and automotive markets.
FAQ
What is the maximum continuous Zener current for MMBZ5234B-7-F at 25°C ambient?
The device supports up to 56 mA continuous Zener current at TA = 25°C, calculated from PD = 350 mW and VZ = 6.2 V. Derating begins above 25°C per Fig. 1, reaching zero dissipation at 150°C ambient.
Is MMBZ5234B-7-F qualified for automotive applications?
Standard MMBZ5234B-7-F is not AEC-Q200 qualified; however, the automotive-grade variant MMBZ5234BQ-7-F is PPAP-capable, manufactured in IATF 16949-certified facilities, and meets AEC-Q200 stress testing requirements.
How does the SOT23 package affect thermal performance compared to DO-35?
SOT23 provides lower thermal resistance to PCB (RθJA = 357 °C/W) than DO-35 (typically >500 °C/W), enabling higher power handling on standard FR-4 without heatsinks - but requires optimized copper pour and pad layout per Diodes' recommended footprint.
Can MMBZ5234B-7-F be used in series for higher voltage regulation?
Yes - two units in series yield ~12.4 V regulation, but mismatched Zener voltages and temperature coefficients cause uneven voltage division; for >10 V applications, dedicated higher-voltage Zeners or active regulators are preferred for stability.
MMBZ5234B-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- 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:
- 350 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:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-3
MMBZ5234B-7-F FAQ
1.How can I place an order for MMBZ5234B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5234B-7-F 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 MMBZ5234B-7-F reliable?
The price and inventory of MMBZ5234B-7-F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5234B-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5234B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5234B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5234B-7-F?
MMBZ5234B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5234B-7-F 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 MMBZ5234B-7-F?
For technical support, including MMBZ5234B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5234B-7-F requirements.
6.How does Aetrix verify that MMBZ5234B-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5234B-7-F 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 MMBZ5234B-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5234B-7-F?
All MMBZ5234B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5234B-7-F, 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 MMBZ5234B-7-F part is unused and in its original packaging.
Return procedure for MMBZ5234B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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