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Diodes Incorporated MMSZ5228BS-7-F
- Part No.:
- MMSZ5228BS-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5228BS-7-F.pdf
- Description:
- DIODE ZENER 3.9V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:77,098
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Product details
Overview
MMSZ5228BS-7-F from Diodes Incorporated is a surface-mount 3.9 V Zener diode in SOD-323 package, rated for 200 mW power dissipation, 20 mA test current, and 23 Ω maximum Zener impedance at IZT; used for voltage regulation and reference in low-power analog circuits, power supply feedback loops, and overvoltage protection.
For engineers reviewing the MMSZ5228BS-7-F datasheet, MMSZ5228BS-7-F pinout, MMSZ5228BS-7-F application, or MMSZ5228BS-7-F equivalent, key selection criteria include nominal Zener voltage (3.9 V), tight tolerance (±5%), low leakage (<10 µA @ 1.0 V), thermal resistance (625 °C/W), and SOD-323 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load or input conditions. It exhibits a nominal Zener voltage of 3.9 V with ±5% tolerance (3.71–4.10 V), tested at 20 mA, and delivers 23 Ω dynamic impedance at that current-critical for precision regulation in low-current bias networks.
Its 200 mW power rating and 625 °C/W junction-to-ambient thermal resistance define safe operating limits on standard FR-4 PCBs with recommended pad layout. Reverse leakage remains ≤10 µA at 1.0 V, supporting low-quiescent-current designs such as sensor references and microcontroller reset circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal, 3.71–4.10 V range at 20 mA - sets precise clamping/reference level in feedback or protection paths |
| Power Dissipation (PD) | 200 mW - limits continuous regulation current to ~51 mA at 3.9 V on standard PCB |
| Zener Impedance (ZZT) | 23 Ω max at 20 mA - determines output voltage stability under small-signal load variation |
| Reverse Leakage (IR) | ≤10 µA at VR = 1.0 V - ensures minimal error current in high-impedance reference nodes |
| Thermal Resistance (RθJA) | 625 °C/W - requires derating above +25°C ambient; full power only at TA ≤ +25°C |
| Package | SOD-323 - 1.2–1.4 mm width, 2.3–2.7 mm length, 0.25–0.35 mm thickness - compatible with 0805-class pick-and-place |
Pinout & Package
Two-terminal device in SOD-323 package: cathode marked by band; anode and cathode terminals defined by polarity marking, not numbered pins. Mounting follows JEDEC MO-203AA outline with 0.2–0.4 mm lead length (L) and 1.0–1.1 mm body width (B).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit ground or lower-potential rail; establishes reference point for regulated voltage at cathode |
| Cathode | Reverse breakdown terminal / regulated output node | Connected to supply rail or feedback node; maintains stable 3.9 V relative to anode when reverse-biased ≥1.0 V |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Enables tight Zener voltage tolerance (±5%) and repeatable breakdown characteristics across production lots |
| Lead-free & RoHS-compliant plating | Matte tin finish over Alloy 42 leadframe meets EU Directive 2011/65/EU without post-reflow contamination risk |
| SOD-323 surface-mount package | 0.004 g weight and JEDEC-standard footprint support high-speed automated placement and reflow soldering |
| Halogen- and antimony-free "Green" status | Meets <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - satisfies stringent environmental compliance for industrial and automotive end equipment |
Applications
| Power Supply Feedback | Sensor Reference Voltage |
|---|---|
Use Scenario: Used in optocoupler-based feedback loop of isolated DC-DC converters to regulate output voltage. IC Role / Device Role: Zener reference element setting TL431 cathode bias or directly shunting error amplifier input. Use Value: 3.9 V nominal voltage and 23 Ω impedance ensure stable regulation within ±1% over 10–20 mA load range. | Use Scenario: Provides stable bias voltage for analog temperature or pressure sensors in battery-powered IoT nodes. IC Role / Device Role: Low-leakage (≤10 µA) voltage reference source for ratiometric ADC excitation or op-amp offset trimming. Use Value: Minimal reverse current preserves battery life while maintaining 3.9 V accuracy for 12-bit sensor signal conditioning. |
| Microcontroller Reset Circuit | Overvoltage Clamp Protection |
Use Scenario: Connected between VCC and RESET pin to hold microcontroller in reset until supply reaches valid operating voltage. IC Role / Device Role: Precision threshold detector using Zener breakdown to trigger external reset IC or internal brown-out detection. Use Value: Tight 3.71–4.10 V range ensures reliable reset assertion at 3.9 V ±5%, avoiding premature release or latch-up. | Use Scenario: Placed across sensitive input pins (e.g., USB data lines or ADC inputs) to clamp ESD transients. IC Role / Device Role: Fast-acting shunt protector diverting surge current above 1.0 V before damage occurs to downstream ICs. Use Value: Low 1.0 V reverse leakage prevents signal distortion during normal operation while enabling sub-ns response to >3.9 V spikes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V9,115 | Same 3.9 V nominal, ±5% tolerance, but SOD-323 package with 300 mW rating and 90 Ω ZZT | Higher power allows greater surge handling; higher impedance reduces regulation precision at low currents | Select when transient energy absorption >200 mW is required, accepting reduced voltage stability below 5 mA |
| MMBZ5228BS-7-F | Identical electrical specs and SOD-323 package, but dual-anode/dual-cathode configuration (dual Zener) | Shares same footprint but provides two independent 3.9 V references per package | Choose for space-constrained dual-reference designs (e.g., positive/negative rail monitoring), not single-device replacement |
Compared with BZX384-B3V9 and MMBZ5228BS-7-F, MMSZ5228BS-7-F offers optimal balance of regulation precision (23 Ω ZZT) and compact size for single-point voltage referencing, whereas alternatives trade impedance for power or integrate redundancy at no footprint gain.
Availability
MMSZ5228BS-7-F is available at Aetrix Electronics and suitable for power supply feedback, sensor reference voltage, and microcontroller reset circuits requiring stable component supply and RoHS-compliant sourcing.
Supply support for MMSZ5228BS-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.
The MMSZ52xxBS series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-reliability voltage regulation in consumer, industrial, and computing applications where space, consistency, and environmental compliance are critical.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The MMSZ5228BS-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. Its reverse breakdown is specified to occur within this range; operation below 1.0 V reverse bias yields ≤10 µA leakage, and sustained voltage above 4.10 V risks exceeding power limits unless current is strictly limited by external resistance.
Does this part meet automotive AEC-Q200 requirements?
No, MMSZ5228BS-7-F is not AEC-Q200 qualified. It is rated for industrial temperature range (–65°C to +150°C) and RoHS compliance, but lacks the stress testing, lot traceability, and failure rate validation required for automotive-grade qualification. For AEC-Q200 applications, consider Diodes' AZ series or ON Semiconductor's 1N4730A-Q.
Can this Zener be used in place of a 3.3 V reference in a low-power sensor circuit?
No-its 3.9 V nominal Zener voltage is outside typical 3.3 V system tolerances. Substituting it would raise bias voltage by 18%, potentially saturating op-amps or exceeding ADC input ranges. For 3.3 V reference, use MMSZ5226BS (3.3 V) or a dedicated shunt reference like TLVH431.
How does the SOD-323 package affect thermal performance compared to larger packages?
The SOD-323 package has a high junction-to-ambient thermal resistance of 625 °C/W, meaning even at 200 mW dissipation, junction temperature rises 125°C above ambient. This necessitates strict derating above +25°C and limits continuous use in enclosed or high-temperature environments-larger packages like DO-35 (300 °C/W) offer better thermal margin for sustained power.
MMSZ5228BS-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 200 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-323
MMSZ5228BS-7-F FAQ
1.How can I place an order for MMSZ5228BS-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5228BS-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 MMSZ5228BS-7-F reliable?
The price and inventory of MMSZ5228BS-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 MMSZ5228BS-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5228BS-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5228BS-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5228BS-7-F?
MMSZ5228BS-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5228BS-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 MMSZ5228BS-7-F?
For technical support, including MMSZ5228BS-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5228BS-7-F requirements.
6.How does Aetrix verify that MMSZ5228BS-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5228BS-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 MMSZ5228BS-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5228BS-7-F?
All MMSZ5228BS-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5228BS-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 MMSZ5228BS-7-F part is unused and in its original packaging.
Return procedure for MMSZ5228BS-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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