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Diodes Incorporated MMSZ5228B-7-F
- Part No.:
- MMSZ5228B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5228B-7-F.pdf
- Description:
- DIODE ZENER 3.9V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:25,130
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Product details
Overview
MMSZ5228B-7-F from Diodes Incorporated is a 3.9 V, 500 mW surface-mount Zener diode in SOD-123 package, rated for 20 mA test current with 23 Ω dynamic impedance at 1 kHz and 10 µA reverse leakage at 1.0 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and digital supply rails.
For engineers reviewing the MMSZ5228B-7-F datasheet, MMSZ5228B-7-F pinout, MMSZ5228B-7-F application, or MMSZ5228B-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5.1%), thermal resistance (338 °C/W), AEC-Q101 qualification status, and SOD-123 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage regulation across varying load currents. Its 3.9 V nominal Zener voltage exhibits a temperature coefficient of approximately +0.04 %/°C (per Figure 6), enabling predictable drift behavior in ambient-temperature-varying circuits.
The device delivers 500 mW power dissipation at lead temperature (TL) of +75°C and derates linearly to 370 mW at +25°C ambient, with junction-to-ambient thermal resistance of 338 °C/W on FR-4 PCB using 1-inch copper pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal, 3.71–4.10 V range at 20 mA - ensures ±5.1% tolerance for stable reference generation |
| Power Dissipation (PD) | 370 mW at TA = +25°C - defines maximum continuous DC power under standard board conditions |
| Zener Impedance (ZZT) | 23 Ω at 1 kHz, 20 mA - determines AC regulation fidelity and ripple rejection capability |
| Reverse Leakage (IR) | 10 µA at VR = 1.0 V - confirms low standby current in clamping or biasing applications |
| Package | SOD-123 - enables compact 2.65 mm × 1.55 mm footprint compatible with high-speed pick-and-place |
| Qualification | AEC-Q101 qualified - validates reliability for automotive electronics under stress testing |
Pinout & Package
Two-terminal device in SOD-123 plastic package with cathode band marking. Terminals are anode (unmarked end) and cathode (band-marked end); polarity must be observed for correct reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential rail in shunt regulation; establishes reference ground point |
| Cathode | Reverse breakdown terminal / Zener voltage output node | Connected to regulated voltage node; supplies stable 3.9 V when reverse biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW power rating at TL = +75°C | Supports higher transient power handling than standard 350 mW Zeners without thermal runaway |
| Totally lead-free and RoHS-compliant construction | Enables compliance with EU environmental directives and eliminates solder joint embrittlement risk |
| Moisture Sensitivity Level 1 | Permits unlimited floor life before reflow - no baking required prior to assembly |
| Matte tin-plated alloy 42 leadframe | Ensures reliable solder wetting and intermetallic formation on standard SnPb or lead-free pastes |
Applications
| Automotive Body Control Module | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 3.3 V microcontroller I/O supply rail in door module PCB exposed to 12 V battery transients. IC Role / Device Role / Timing Role: Shunt voltage reference and overvoltage clamp protecting MCU GPIO pins during load dump events. Use Value: Maintains 3.9 V clamping threshold below 5.5 V absolute maximum rating of 3.3 V logic, preventing latch-up. | Use Scenario: Biasing op-amp input stage in 4–20 mA current loop transmitter operating at 24 V supply. IC Role / Device Role / Timing Role: Precision voltage reference for DAC output scaling and sensor excitation circuitry. Use Value: Delivers ±5.1% voltage stability across -40°C to +125°C, meeting industrial accuracy requirements. |
| Consumer USB-C Power Delivery Adapter | Medical Portable Diagnostic Device |
Use Scenario: Providing stable 3.9 V reference for secondary-side feedback controller in isolated flyback converter. IC Role / Device Role / Timing Role: Voltage reference for optocoupler-coupled error amplifier in constant-voltage regulation loop. Use Value: Enables <1% output voltage deviation across line/load variations due to tight Zener tolerance and low ZZT. | Use Scenario: Clamping ESD-sensitive analog front-end inputs in handheld pulse oximeter with lithium battery supply. IC Role / Device Role / Timing Role: Transient voltage suppressor for biopotential signal path inputs referenced to 3.3 V rail. Use Value: Limits input voltage to ≤4.1 V during 8 kV HBM ESD event, preserving ADC input integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C3V9 | 3.9 V, 300 mW, SOD-323 package, 90 Ω ZZT | Lower power rating and higher impedance limit use in precision references | Select when board space is constrained and regulation fidelity is secondary to footprint size |
| 1N4733A | 5.1 V, 1 W, DO-41 through-hole, 17 Ω ZZT | Voltage mismatch and through-hole mounting preclude direct substitution | Choose only for legacy through-hole designs requiring higher power and different voltage level |
Compared with BZX584C3V9 and 1N4733A, MMSZ5228B-7-F offers optimal balance of SOD-123 surface-mount compatibility, 3.9 V regulation accuracy, and 23 Ω low-impedance performance-making it preferred for modern compact, automotive-grade, and low-noise analog designs.
Availability
MMSZ5228B-7-F is available at Aetrix Electronics and suitable for automotive body control modules, industrial sensor transmitters, USB-C power adapters, and portable medical diagnostics requiring stable component supply and AEC-Q101 reliability assurance.
Supply support for MMSZ5228B-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.
MMSZ5228B-7-F belongs to the MMSZ52xxB series of 500 mW Zener diodes designed for general-purpose voltage regulation and clamping in space-constrained, high-volume surface-mount applications.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The MMSZ5228B-7-F has a nominal Zener voltage of 3.9 V with a guaranteed range of 3.71–4.10 V at 20 mA test current. Breakdown occurs within this range; it is not rated for sustained reverse voltage beyond its specified VZ range. Applying >4.10 V continuously risks exceeding power limits and thermal failure.
Is this part suitable for use in automotive applications?
Yes - MMSZ5228B-7-F is explicitly qualified to AEC-Q101 standards, confirming its suitability for automotive electronics including body control modules, lighting drivers, and infotainment subsystems where temperature cycling, humidity, and vibration reliability are critical.
How does the SOD-123 package affect thermal performance?
Mounted on FR-4 PCB with 1-inch copper pad, the SOD-123 package achieves 338 °C/W junction-to-ambient thermal resistance. This allows 370 mW dissipation at +25°C ambient but requires derating to 500 mW only at +75°C lead temperature - design must account for localized board heating near the device.
Can this Zener replace a 3.3 V reference in a precision ADC circuit?
No - with ±5.1% tolerance (3.71–4.10 V), MMSZ5228B-7-F lacks the initial accuracy and low temperature coefficient needed for high-resolution ADC references. It is appropriate for non-critical biasing or clamping, but dedicated voltage references like REF3033 (0.2% max, 50 ppm/°C) are recommended for precision conversion.
MMSZ5228B-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):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 23 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 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
MMSZ5228B-7-F FAQ
1.How can I place an order for MMSZ5228B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5228B-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 MMSZ5228B-7-F reliable?
The price and inventory of MMSZ5228B-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 MMSZ5228B-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5228B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5228B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5228B-7-F?
MMSZ5228B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5228B-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 MMSZ5228B-7-F?
For technical support, including MMSZ5228B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5228B-7-F requirements.
6.How does Aetrix verify that MMSZ5228B-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5228B-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 MMSZ5228B-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5228B-7-F?
All MMSZ5228B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5228B-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 MMSZ5228B-7-F part is unused and in its original packaging.
Return procedure for MMSZ5228B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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