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Diodes Incorporated MMSZ5227BS-7
- Part No.:
- MMSZ5227BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5227BS-7.pdf
- Description:
- DIODE ZENER 3.6V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:6,971
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Product details
Overview
MMSZ5227BS-7 from Diodes Incorporated is a surface-mount 3.6 V Zener diode in SOD-323 package, rated for 200 mW power dissipation, 24 Ω zener impedance at 20 mA test current, and maximum 15 µA reverse leakage at 1.0 V reverse bias. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning and power rail regulation circuits.
For engineers reviewing the MMSZ5227BS-7 datasheet, MMSZ5227BS-7 pinout, MMSZ5227BS-7 application, or MMSZ5227BS-7 equivalent, key selection criteria include nominal zener voltage tolerance (±5%), thermal resistance (625 °C/W), cathode-band polarity marking, JEDEC-compliant SOD-323 footprint, and RoHS/halogen-free compliance for consumer and industrial PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across 20 mA test current. Its planar die construction ensures stable zener characteristics and low dynamic impedance (24 Ω at IZT = 20 mA) under DC and low-frequency transient conditions.
The device exhibits 15 µA maximum reverse leakage at VR = 1.0 V and maintains operation from –65 °C to +150 °C. Its SOD-323 package delivers minimal thermal resistance to ambient (625 °C/W on FR-4 board) while supporting automated pick-and-place assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 3.6 V - precise DC reference point for feedback networks or voltage threshold detection |
| Zener Voltage Range | 3.42 V to 3.78 V - ±5% tolerance ensures predictable clamping without external trimming |
| Test Current (IZT) | 20 mA - standard operating point where zener voltage and impedance are specified |
| Zener Impedance (ZZT) | 24 Ω - low dynamic resistance enables stable regulation under varying load currents |
| Power Dissipation | 200 mW - limits continuous power handling; derates linearly above 25 °C ambient |
| Reverse Leakage (IR) | 15 µA @ 1.0 V - negligible standby current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 625 °C/W - defines junction-to-ambient temperature rise per watt on standard FR-4 layout |
Pinout & Package
Package: SOD-323 - ultra-small plastic surface-mount case (2.3–2.7 mm length × 1.2–1.4 mm width × 0.25–0.35 mm height), cathode indicated by band marking, compatible with IPC-7351B footprint SOD323.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to lower-potential side of regulated circuit; establishes reference return path |
| Cathode | Reverse breakdown terminal / Zener output node | Delivers stable 3.6 V when reverse-biased; marked with visible band on top surface |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable zener voltage distribution and long-term stability under thermal cycling |
| SOD-323 package | Enables high-density PCB layouts and compatibility with standard 0805-sized land patterns |
| Lead-free & RoHS compliant | Meets EU Directive 2011/65/EU with <900 ppm Br/Cl and <1000 ppm Sb compounds |
| Automated assembly suitability | Matte tin-plated terminals meet MIL-STD-202 solderability requirements for reflow and wave processes |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
|
Use Scenario: Regulating output voltage in low-current linear regulators or switching converter feedback loops. IC Role / Device Role: Precision voltage reference node tied to error amplifier input. Use Value: Maintains ±5% output accuracy over temperature and line variations without trimming resistors. |
Use Scenario: Clamping transient surges on 3.3 V logic rails or sensor supply lines. IC Role / Device Role: Shunt protection element that conducts excess current above 3.6 V. Use Value: Limits voltage excursion to ≤3.78 V during ESD or load-dump events with 15 µA standby leakage. |
| Reference Voltage Source | Signal Level Translation |
|
Use Scenario: Providing stable bias for op-amp comparators or ADC reference dividers. IC Role / Device Role: Low-drift DC reference generator in analog front-end circuits. Use Value: Delivers 3.6 V ±5% with 24 Ω dynamic impedance, minimizing reference error under 1–5 mA load changes. |
Use Scenario: Translating 5 V microcontroller GPIO signals to 3.3 V interface levels. IC Role / Device Role: Clamp diode limiting high-side voltage swing to safe logic thresholds. Use Value: Prevents 5 V overshoot from damaging 3.3 V inputs while adding <0.1 µA static loading. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C3V6 | Same 3.6 V nominal, but SOD-523 package (smaller); 300 mW rating; 90 Ω ZZT | Higher power handling but larger zener impedance reduces regulation precision | Prefer for higher-power clamping where size allows; avoid in precision reference roles |
| MMBZ5227BS | Identical electrical specs, but SOT-23 package; 350 mW rating; same 24 Ω ZZT | Larger footprint supports higher thermal dissipation in space-tolerant designs | Choose when board layout permits SOT-23 and >200 mW margin is required |
Compared with BZX584-C3V6 and MMBZ5227BS, the MMSZ5227BS-7 offers optimal balance of compact SOD-323 size, tight 24 Ω impedance, and 200 mW capability-making it ideal for space-constrained, precision-regulated 3.3 V system nodes.
Availability
MMSZ5227BS-7 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and reference voltage source applications requiring stable component supply and full RoHS compliance.
Supply support for MMSZ5227BS-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, specializing in high-reliability, industry-standard components for power management, signal integrity, and protection.
The MMSZ5227BS-7 belongs to the MMSZ52xxBS series of surface-mount Zener diodes designed specifically for general-purpose voltage regulation and clamping in space-sensitive consumer, computing, and industrial electronics.
FAQ
What is the maximum reverse voltage before breakdown for MMSZ5227BS-7?
The nominal zener voltage is 3.6 V with a guaranteed range of 3.42 V to 3.78 V at 20 mA test current. Breakdown begins near the minimum value (3.42 V) and stabilizes within this band; operation below 3.42 V results in only leakage current (<15 µA at 1.0 V).
Can MMSZ5227BS-7 be used in place of a 3.3 V Zener diode?
No - its nominal voltage is 3.6 V, not 3.3 V. Substituting it for a 3.3 V part (e.g., MMSZ5226BS) would raise regulated or clamped voltages by ~0.3 V, potentially exceeding downstream device absolute maximum ratings or altering feedback setpoints.
Does MMSZ5227BS-7 require a series current-limiting resistor?
Yes - like all Zener diodes, it must be used with a series resistor to limit current to ≤20 mA under worst-case input conditions. The resistor value is calculated using (VIN(MAX) − 3.6 V) / 20 mA, ensuring power dissipation stays within 200 mW.
Is the SOD-323 package compatible with standard reflow profiles?
Yes - the device is qualified for lead-free reflow per J-STD-020D Level 1 moisture sensitivity, with matte tin plating meeting MIL-STD-202 solderability requirements. Recommended peak temperature is 260 °C for ≤10 seconds in standard Pb-free profiles.
MMSZ5227BS-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):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 24 Ohms
- Current - Reverse Leakage @ Vr:
- 15 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
MMSZ5227BS-7 FAQ
1.How can I place an order for MMSZ5227BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5227BS-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 MMSZ5227BS-7 reliable?
The price and inventory of MMSZ5227BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5227BS-7 is usually 5 days.
3.What payment methods are accepted for MMSZ5227BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5227BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5227BS-7?
MMSZ5227BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5227BS-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 MMSZ5227BS-7?
For technical support, including MMSZ5227BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5227BS-7 requirements.
6.How does Aetrix verify that MMSZ5227BS-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5227BS-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 MMSZ5227BS-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5227BS-7?
All MMSZ5227BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5227BS-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 MMSZ5227BS-7 part is unused and in its original packaging.
Return procedure for MMSZ5227BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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