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Diodes Incorporated MMSZ5230B-7-F
- Part No.:
- MMSZ5230B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5230B-7-F.pdf
- Description:
- DIODE ZENER 4.7V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:10,145
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Product details
Overview
MMSZ5230B-7-F from Diodes Incorporated is a 4.7 V, 500 mW surface-mount Zener diode in SOD-123 package, rated for 20 mA test current with 19 Ω dynamic impedance at 1 kHz and 5.0 µA reverse leakage at 2.0 V, widely used for voltage regulation and reference in power supply feedback loops and analog signal conditioning circuits.
For engineers reviewing the MMSZ5230B-7-F datasheet, MMSZ5230B-7-F pinout, MMSZ5230B-7-F application, or MMSZ5230B-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), thermal resistance (338 °C/W), RoHS-compliant green molding compound, AEC-Q101 qualification, and cathode-band polarity marking for automated assembly verification.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across load variations and temperature shifts. Its 4.7 V nominal Zener voltage exhibits a positive temperature coefficient (~+0.03 %/°C per Figure 6), enabling predictable drift behavior in precision references.
The device delivers regulated output under DC or low-frequency AC conditions with 19 Ω Zener impedance at 20 mA and 1,900 Ω at 0.25 mA, supporting both medium-current regulation and low-power biasing roles in analog front-ends and sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 4.7 V nominal, 4.47–4.94 V range at 20 mA - ensures ±5% regulation accuracy in feedback networks |
| Power Dissipation | 370 mW @ TA = +25°C - defines maximum continuous DC power on standard FR-4 PCB |
| Zener Impedance (ZZT) | 19 Ω @ IZT = 20 mA, f = 1 kHz - determines AC ripple rejection capability in regulated supplies |
| Reverse Leakage (IR) | 5.0 µA @ VR = 2.0 V - limits quiescent current error in high-impedance reference nodes |
| Thermal Resistance (RθJA) | 338 °C/W - sets junction temperature rise per watt dissipated without heatsinking |
| Package | SOD-123 - 2-pin surface-mount outline with 0.57 mm lead width and 2.65 mm body width for compact layout |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling and HTRB stress |
Pinout & Package
Two-terminal device in SOD-123 package: anode and cathode marked by molded cathode band. No internal circuitry - terminals serve only as bidirectional DC connection points with polarity-dependent conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to lower-potential side of circuit; forms return path during reverse-bias regulation |
| Cathode | Reverse breakdown terminal / regulated output node | Marked with band; connected to higher-potential side to establish stable 4.7 V reference above anode |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW Power Rating | Enables use in medium-current regulator shunts up to ~100 mA with appropriate series resistance |
| AEC-Q101 Qualification | Supports deployment in automotive cabin control modules and body electronics requiring extended lifetime validation |
| Green Molding Compound | UL 94V-0 flammability rating and halogen/antimony-free composition meet stringent environmental compliance |
| Moisture Sensitivity Level 1 | Eliminates bake requirements before reflow, reducing manufacturing cost and process complexity |
| Matte Tin Lead Finish | Ensures reliable solder wetting and intermetallic formation on standard PCB finishes without lead-free compatibility issues |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or buck converter feedback paths using optocoupler-coupled TL431 alternatives. IC Role / Device Role: Precision voltage reference node establishing regulation threshold for error amplifier input. Use Value: 4.7 V nominal value matches common 5 V rail sensing; ±5% tolerance allows direct replacement in legacy designs without loop compensation changes. |
Use Scenario: Protecting microcontroller I/O pins from transient overvoltage events exceeding 5 V logic thresholds. IC Role / Device Role: Shunt clamp limiting voltage excursion to ≤4.94 V during ESD or inductive kick events. Use Value: 19 Ω dynamic impedance ensures clamping voltage remains within safe margin below 5.5 V absolute maximum ratings. |
| Temperature-Stable Bias Generator | Analog Sensor Signal Conditioning |
Use Scenario: Generating stable bias current for op-amp input stages or transistor amplifiers operating across -40°C to +125°C. IC Role / Device Role: Low-drift voltage reference source feeding resistor-based current generator. Use Value: Positive temperature coefficient (+0.03 %/°C) compensates for typical NPN base-emitter voltage drift, improving overall thermal stability. |
Use Scenario: Providing excitation voltage for resistive bridge sensors (e.g., strain gauges) in industrial measurement systems. IC Role / Device Role: Low-noise, low-drift reference source powering Wheatstone bridge arms. Use Value: 5.0 µA leakage at 2.0 V minimizes offset error in high-impedance sensor interfaces where bias current directly impacts measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C4V7 | 4.7 V ±5%, 300 mW rating, SOD-323 package, 90 Ω ZZT @ 5 mA | Lower power handling and higher impedance limit use to low-current biasing only | Select when board space is constrained and <10 mA regulation current suffices |
| MMBZ5230BS | 4.7 V ±5%, 300 mW, SOT-23 package, dual-anode configuration | Dual-diode layout supports redundancy or differential referencing not possible with single-device MMSZ5230B-7-F | Choose for designs requiring dual Zener functions or tighter footprint than SOD-123 allows |
Compared with BZX584-C4V7 and MMBZ5230BS, MMSZ5230B-7-F offers superior power handling (370 mW vs. 300 mW), lower dynamic impedance (19 Ω vs. ≥90 Ω), and automotive qualification - making it preferred for robust, medium-current regulation in harsh environments.
Availability
MMSZ5230B-7-F is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, analog bias generation, and sensor excitation requiring stable component supply and long-term manufacturability.
Supply support for MMSZ5230B-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 consumer markets.
MMSZ5230B-7-F belongs to the MMSZ52xxB family of general-purpose Zener diodes designed for cost-effective, automated-assembly-compatible voltage regulation in commercial and automotive applications.
FAQ
What is the maximum continuous Zener current for MMSZ5230B-7-F at 25°C ambient?
The device supports up to 78 mA continuous Zener current at 25°C ambient, calculated from its 370 mW power rating and 4.7 V nominal voltage (370 mW ÷ 4.7 V ≈ 78.7 mA). Derating applies above 25°C per Figure 1's power derating curve, reaching zero at 150°C junction temperature.
Is MMSZ5230B-7-F suitable for use in automotive infotainment systems?
Yes - it is AEC-Q101 qualified and manufactured with halogen-free green molding compound meeting automotive environmental standards. Its SOD-123 package withstands thermal cycling and vibration profiles required for dashboard and center-stack electronics.
How does the cathode band orientation affect PCB layout verification?
The molded cathode band must align with the silkscreen polarity mark on the PCB. Misalignment causes forward conduction instead of Zener regulation, resulting in unregulated voltage and potential downstream damage. Automated optical inspection (AOI) systems rely on this band for placement verification in high-volume assembly.
Can MMSZ5230B-7-F replace older MMSZ5230 devices without design changes?
Yes - the "-7-F" suffix denotes tape-and-reel packaging and RoHS compliance; electrical characteristics and SOD-123 mechanical dimensions match legacy MMSZ5230 variants. No schematic or layout modifications are needed for drop-in replacement in existing designs.
MMSZ5230B-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):
- 4.7 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 19 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 2 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
MMSZ5230B-7-F FAQ
1.How can I place an order for MMSZ5230B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5230B-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 MMSZ5230B-7-F reliable?
The price and inventory of MMSZ5230B-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 MMSZ5230B-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5230B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5230B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5230B-7-F?
MMSZ5230B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5230B-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 MMSZ5230B-7-F?
For technical support, including MMSZ5230B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5230B-7-F requirements.
6.How does Aetrix verify that MMSZ5230B-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5230B-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 MMSZ5230B-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5230B-7-F?
All MMSZ5230B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5230B-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 MMSZ5230B-7-F part is unused and in its original packaging.
Return procedure for MMSZ5230B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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