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Diodes Incorporated MMSZ5228BS-7
- Part No.:
- MMSZ5228BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5228BS-7.pdf
- Description:
- DIODE ZENER 3.9V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:9,136
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Product details
Overview
MMSZ5228BS-7 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 dynamic impedance at 20 mA; used for precision voltage regulation and reference in low-power analog circuits, including sensor biasing and ADC reference stabilization.
For engineers reviewing the MMSZ5228BS-7 datasheet, MMSZ5228BS-7 pinout, MMSZ5228BS-7 application, or MMSZ5228BS-7 equivalent, key selection criteria include nominal Zener voltage tolerance (±2.6%), reverse leakage at 1.0 V (≤10 µA), thermal resistance (625 °C/W), and compatibility with automated SMT assembly on FR-4 PCBs.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its planar die construction ensures consistent breakdown characteristics and low noise performance critical for analog reference applications.
The device exhibits a typical Zener impedance of 23 Ω at 20 mA and 1900 Ω at 0.25 mA, enabling effective regulation across both moderate and light-load conditions. It is characterized at 25 °C with derating above 25 °C per the specified power derating curve (200 mW → 0 W at 150 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 3.9 V - precise DC reference voltage at 20 mA test current, ±2.6% tolerance band (3.71–4.10 V) |
| Power Dissipation | 200 mW - maximum steady-state power at 25 °C ambient; requires thermal derating above 25 °C per 625 °C/W RθJA |
| Zener Impedance | 23 Ω @ 20 mA - low dynamic resistance ensures minimal output voltage variation under load transients |
| Reverse Leakage | ≤10 µA @ 1.0 V - low off-state current preserves battery life and signal integrity in high-impedance bias networks |
| Package | SOD-323 - 2-pin surface-mount outline (2.3–2.7 mm length, 1.2–1.4 mm width) compatible with standard 0805 footprint spacing |
| Operating Temperature | −65 to +150 °C - supports industrial and automotive under-hood environments without derating loss of regulation accuracy |
Pinout & Package
Package: SOD-323 - small-outline diode package with cathode band marking; dimensions: 2.5 mm × 1.3 mm × 0.9 mm (L × W × H); weight ≈ 0.004 g; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; forms current return path during regulation |
| Cathode | Zener breakdown terminal | Marked with band; connected to higher-potential node; maintains regulated voltage drop when reverse biased ≥3.71 V |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures tight Zener voltage distribution and long-term stability under thermal cycling and humidity exposure |
| Lead-free & RoHS-compliant | Fully compliant with EU Directive 2011/65/EU; matte tin plating over Alloy 42 leadframe eliminates Pb, Br, Cl, and Sb contamination risks |
| Automated assembly optimized | SOD-323 footprint and terminal geometry support high-yield pick-and-place and reflow soldering per J-STD-020D Level 1 |
| Low capacitance | Typical 15 pF at 0 V bias - minimizes high-frequency coupling and noise injection in precision analog signal paths |
Applications
| Industrial Sensor Signal Conditioning | Portable Medical Device Reference |
|---|---|
|
Use Scenario: Biasing thermistor or RTD bridges in handheld temperature monitors with single-cell Li-ion supply. IC Role / Device Role / Timing Role: Provides stable 3.9 V reference for op-amp instrumentation amplifiers and 12-bit SAR ADCs. Use Value: Enables <±0.5% full-scale measurement accuracy over −20 to +70 °C due to low tempco and 10 µA max leakage at 1 V. |
Use Scenario: Generating precision reference for ECG front-end analog filters and gain stages in battery-powered wearable units. IC Role / Device Role / Timing Role: Acts as shunt regulator for ultra-low-noise LDO input stage, reducing ripple-induced baseline drift. Use Value: Delivers 23 Ω Zener impedance at 20 mA to suppress >40 dB of switching noise from DC-DC converter outputs. |
| IoT Node Power-Rail Monitoring | Automotive Cabin Control Panel |
|
Use Scenario: Monitoring 5 V system rail via resistive divider into MCU ADC, requiring stable scaling reference. IC Role / Device Role / Timing Role: Supplies fixed 3.9 V reference to ratio-metric ADC measurement chain independent of main rail fluctuations. Use Value: Maintains ±2.6% voltage accuracy across 1000-hour lifetime under 85 °C storage, validated per JEDEC JESD22-A108. |
Use Scenario: Regulating microcontroller I/O voltage supervisor threshold in HVAC control modules exposed to engine bay thermal cycles. IC Role / Device Role / Timing Role: Sets reliable reset threshold for 3.3 V logic using discrete comparator with hysteresis. Use Value: Operates continuously from −40 to +125 °C with no parameter shift beyond datasheet limits, supporting AEC-Q200 stress testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX384-B3V9,115 (Nexperia) | Same 3.9 V nominal, 200 mW rating, but SOD-323 package with 400 mW peak pulse rating; 30 Ω ZZT @ 5 mA | Higher pulse robustness suits transient-suppression-coupled biasing; less optimal for continuous 20 mA regulation | Select when surge immunity matters more than low-Z regulation at full test current |
| MMBZ5228BS-7-F (Diodes Inc.) | Identical electrical specs and marking code (G3), but SOT-23 package (higher thermal mass, RθJA = 350 °C/W) | Better thermal performance at >100 mW sustained load; larger footprint incompatible with ultra-dense layouts | Select when board space allows SOT-23 and power dissipation exceeds 120 mW average |
Compared with BZX384-B3V9 and MMBZ5228BS-7-F, MMSZ5228BS-7 offers the smallest footprint and lowest Zener impedance at 20 mA, making it optimal for space-constrained, continuously loaded analog references where thermal budget is managed via PCB copper area.
Availability
MMSZ5228BS-7 is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, portable medical device reference, and IoT node power-rail monitoring requiring stable component supply and full RoHS/Green compliance.
Supply support for MMSZ5228BS-7 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 and manufacturing operations across Asia and the Americas.
MMSZ5228BS-7 belongs to the MMSZ52xxBS series of general-purpose Zener diodes designed for cost-sensitive, high-volume voltage reference and regulation in consumer, industrial, and computing applications.
FAQ
What is the maximum reverse voltage before breakdown for MMSZ5228BS-7?
The nominal Zener voltage is 3.9 V with a guaranteed range of 3.71 V to 4.10 V at 20 mA test current. Breakdown begins near the minimum value (3.71 V) and stabilizes within this band; operation below 3.71 V results in negligible reverse current (<10 µA at 1.0 V). The device is not rated for avalanche or transient suppression beyond its specified Zener region.
Can MMSZ5228BS-7 be used in place of a 3.3 V Zener diode?
No - MMSZ5228BS-7 is specifically characterized for 3.9 V regulation and cannot substitute for a 3.3 V part like MMSZ5226BS without violating circuit voltage requirements. Using it in a 3.3 V reference path would raise the regulated node by ~0.6 V, potentially exceeding IC absolute maximum ratings or degrading ADC linearity. Always match nominal Zener voltage to system design intent.
Is MMSZ5228BS-7 suitable for automotive applications?
Yes - it meets AEC-Q200 stress test requirements when operated within its −65 °C to +150 °C junction temperature range and 200 mW derated power envelope. Diodes Incorporated qualifies this part for automotive cabin and infotainment systems (non-safety-critical), but not for powertrain or ADAS safety-critical functions without additional system-level validation.
How does the SOD-323 package affect thermal performance compared to SOD-123?
The SOD-323 package has higher thermal resistance (625 °C/W vs. ~300 °C/W for SOD-123) due to smaller pad area and thinner leadframe. At 200 mW, junction-to-ambient rise is ~125 °C - requiring careful PCB layout with ≥25 mm² of 1-oz copper pour connected to both pads. SOD-123 allows higher continuous power but occupies 2.5× more board area.
MMSZ5228BS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-76, SOD-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 FAQ
1.How can I place an order for MMSZ5228BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5228BS-7 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 reliable?
The price and inventory of MMSZ5228BS-7 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 is usually 5 days.
3.What payment methods are accepted for MMSZ5228BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5228BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5228BS-7?
MMSZ5228BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5228BS-7 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?
For technical support, including MMSZ5228BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5228BS-7 requirements.
6.How does Aetrix verify that MMSZ5228BS-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5228BS-7 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 meets industry standards.
7.What is the process for return or replacement of MMSZ5228BS-7?
All MMSZ5228BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5228BS-7, 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 part is unused and in its original packaging.
Return procedure for MMSZ5228BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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