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Diodes Incorporated MMSZ5234B-7-F
- Part No.:
- MMSZ5234B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5234B-7-F.pdf
- Description:
- DIODE ZENER 6.2V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:55,291
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Product details
Overview
MMSZ5234B-7-F from Diodes Incorporated is a 6.2 V, 500 mW surface-mount Zener diode in SOD-123 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 serves as a precision voltage reference or overvoltage clamp in low-power analog circuits, power supply feedback loops, and ESD-protected I/O stages.
For engineers reviewing the MMSZ5234B-7-F datasheet, MMSZ5234B-7-F pinout, MMSZ5234B-7-F application, or MMSZ5234B-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (338 °C/W), AEC-Q101 qualification, RoHS/Green compliance, and SOD-123 footprint compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage regulation across varying load currents and temperatures. Its 6.2 V nominal Zener voltage exhibits a near-zero temperature coefficient (~0.02 %/°C), minimizing drift in reference applications from −65 °C to +150 °C.
The device delivers 500 mW power dissipation at lead temperature (TL) of +75 °C and 370 mW at ambient (TA = +25 °C) on FR-4 PCB with 1-inch copper pad. Cathode band polarity and matte tin-plated Alloy 42 leads ensure reliable 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 range at 20 mA - ensures ±5% tolerance for stable reference generation |
| Power Dissipation (PD) | 370 mW at TA = +25 °C - defines maximum continuous power on standard PCB layout |
| Zener Impedance (ZZT) | 7 Ω at 1 kHz, 20 mA - enables low AC ripple in regulated output paths |
| Reverse Leakage (IR) | 5.0 µA max at VR = 4.0 V - guarantees minimal quiescent current in standby mode |
| Thermal Resistance (RθJA) | 338 °C/W - determines junction temperature rise under load for reliability margining |
| Operating Temperature | −65 °C to +150 °C - supports automotive under-hood and industrial control environments |
| Package | SOD-123 - 2.65 mm × 1.55 mm footprint compatible with high-density SMT lines |
Pinout & Package
Two-terminal device in SOD-123 plastic package with cathode band marking. Terminals are anode (unmarked end) and cathode (band end); polarity must be observed for correct reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node in shunt regulator configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to input rail or feedback node; clamps voltage to 6.2 V when reverse biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics requiring high-reliability stress testing (HTOL, TC, HAST) |
| Lead-free & Green compliant | Halogen- and antimony-free molding compound (<900 ppm Br/Cl, <1000 ppm Sb) meeting RoHS 2 and JEDEC J-STD-020 Level 1 |
| Automated assembly optimized | SOD-123 footprint and matte tin plating support high-yield reflow and wave soldering |
| Low Zener impedance | 7 Ω at 20 mA enables tight regulation in feedback networks without external compensation |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp for Microcontroller I/O |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck-boost converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 6.2 V threshold to TL431 or optocoupler LED anode. Use Value: Maintains ±1% output regulation across line/load transients due to tight VZ tolerance and low ZZT. | Use Scenario: Protecting 3.3 V or 5 V GPIO pins against ESD and transient overvoltage events. IC Role / Device Role / Timing Role: Low-capacitance (≈15 pF) shunt clamp diverting surge current away from sensitive CMOS inputs. Use Value: Limits pin voltage to ≤6.2 V during 8 kV contact ESD (IEC 61000-4-2) without latch-up or damage. |
| Temperature-Stable Sensor Biasing | Low-Power Analog Reference Generator |
Use Scenario: Providing excitation voltage to RTD or thermistor bridges in industrial temperature transmitters. IC Role / Device Role / Timing Role: Precision bias source with near-zero TC (0.02 %/°C) minimizing measurement drift over −40 °C to +125 °C. Use Value: Reduces system-level temperature error to <0.1 °C/°C ambient shift in 4–20 mA loop-powered sensors. | Use Scenario: Generating stable 6.2 V reference for ADCs, DACs, or comparators in battery-powered IoT nodes. IC Role / Device Role / Timing Role: Low-quiescent-current (5 µA @ 4 V) shunt reference enabling multi-year coin-cell operation. Use Value: Delivers 6.2 V ±0.3 V accuracy with <10 ppm/°C drift, eliminating need for active reference ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C6V2 | Same 6.2 V nominal, but 300 mW PD and higher ZZT (15 Ω); SOD-523 package (1.3 × 0.8 mm) | Higher thermal resistance limits use in sustained-load regulation; smaller footprint suits ultra-dense layouts | Select when board space is critical and power <200 mW; avoid in feedback loops requiring low impedance |
| MMBZ5234BS | Same electrical specs, but dual-anode SOT-23 package with three terminals (cathode + two anodes) | Enables dual-rail clamping or redundancy; requires different PCB layout and routing | Choose for designs needing two independent 6.2 V clamps or fault-tolerant I/O protection |
Compared with BZX584C6V2 and MMBZ5234BS, MMSZ5234B-7-F offers superior thermal performance (370 mW vs. 300 mW), lower dynamic impedance (7 Ω vs. 15 Ω), and proven AEC-Q101 qualification-making it optimal for automotive power management and industrial feedback systems where stability and reliability are non-negotiable.
Availability
MMSZ5234B-7-F is available at Aetrix Electronics and suitable for automotive infotainment power supplies, industrial sensor signal conditioning, and consumer USB-C PD adapter feedback circuits requiring stable component supply and long-term lifecycle assurance.
Supply support for MMSZ5234B-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, specializing in high-reliability components for automotive, industrial, and computing markets since 1960.
The MMSZ52xxB series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-volume voltage regulation and protection in space-constrained surface-mount applications.
FAQ
What is the maximum reverse voltage that can be safely applied before breakdown?
The MMSZ5234B-7-F has a nominal Zener voltage of 6.2 V with a guaranteed range of 5.89 V to 6.51 V at 20 mA. Breakdown begins within this range; applying >6.51 V continuously risks exceeding power limits unless current is strictly limited by series resistance to stay within 370 mW derated for ambient temperature.
Is this part suitable for use in automotive applications?
Yes - MMSZ5234B-7-F is explicitly qualified to AEC-Q101 standards, including high-temperature operating life, temperature cycling, and humidity testing. Its −65 °C to +150 °C operating range and green, halogen-free construction meet automotive Tier-1 supplier requirements for engine control units and body electronics.
How does the SOD-123 package affect thermal performance compared to larger packages?
The SOD-123 package has RθJA = 338 °C/W on FR-4 with 1-inch copper pad, meaning a 370 mW load raises junction temperature by ~125 °C above ambient. Larger packages like DO-35 offer lower RθJA, but SOD-123's compact size and AEC-Q101 validation make it preferred for modern automotive PCBs where space and reliability are balanced.
Can this Zener diode replace a TL431 in feedback circuits?
No - the MMSZ5234B-7-F is a passive two-terminal shunt regulator with fixed 6.2 V output, while TL431 is an adjustable 2.5 V precision programmable shunt regulator with active error amplification. It can serve as a simple reference in basic feedback paths but lacks the accuracy, temperature stability, and adjustability of TL431 for high-performance SMPS.
MMSZ5234B-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 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:
- SOD-123
MMSZ5234B-7-F FAQ
1.How can I place an order for MMSZ5234B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5234B-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 MMSZ5234B-7-F reliable?
The price and inventory of MMSZ5234B-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 MMSZ5234B-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5234B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5234B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5234B-7-F?
MMSZ5234B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5234B-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 MMSZ5234B-7-F?
For technical support, including MMSZ5234B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5234B-7-F requirements.
6.How does Aetrix verify that MMSZ5234B-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5234B-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 MMSZ5234B-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5234B-7-F?
All MMSZ5234B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5234B-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 MMSZ5234B-7-F part is unused and in its original packaging.
Return procedure for MMSZ5234B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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