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Diodes Incorporated MMSZ5225BS-7
- Part No.:
- MMSZ5225BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-76, SOD-323
- Datasheet:
-
MMSZ5225BS-7.pdf
- Description:
- DIODE ZENER 3V 200MW SOD323
- Quantity:
- Payment:
- Shipping:
Inventory:3,475
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Product details
Overview
MMSZ5225BS-7 from Diodes Incorporated is a surface-mount 3.0 V Zener diode in SOD-323 package, rated for 200 mW power dissipation, 20 mA test current, and 1600 Ω maximum Zener impedance at 20 mA; used for voltage regulation and reference in low-power analog circuits, including sensor biasing and microcontroller reset supervision.
For engineers reviewing the MMSZ5225BS-7 datasheet, MMSZ5225BS-7 pinout, MMSZ5225BS-7 application, or MMSZ5225BS-7 equivalent, key selection criteria include nominal Zener voltage (3.0 V ±5%), reverse leakage (≤50 µA at 1.0 V), thermal resistance (625 °C/W), and SOD-323 footprint compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. It features planar die construction for consistent VZ tolerance (±5% at IZT = 20 mA) and low dynamic impedance (1600 Ω max at 20 mA, 7 Ω typical at 1 mA).
Designed for general-purpose voltage referencing, it supports operation from −65 °C to +150 °C and exhibits ≤50 µA reverse leakage at 1.0 V, enabling reliable performance in battery-powered and industrial signal-conditioning circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.0 V nominal, 2.85–3.15 V range at 20 mA - ensures tight regulation for 3.3 V rail monitoring and LDO feedback. |
| Power Dissipation (PD) | 200 mW at TA = 25 °C - limits continuous current to ~66 mA at 3.0 V, suitable for low-duty-cycle clamping. |
| Zener Impedance (ZZT) | 1600 Ω max at 20 mA - indicates moderate regulation stiffness; sufficient for non-critical references but not precision DACs. |
| Reverse Leakage (IR) | ≤50 µA at VR = 1.0 V - enables low-quiescent-current bias networks without significant error contribution. |
| Thermal Resistance (RθJA) | 625 °C/W on FR-4 board - requires derating above 25 °C ambient; full power only viable below ~75 °C case temperature. |
| Forward Voltage (VF) | 0.9 V at IF = 10 mA - usable as low-drop rectifier or ESD clamp in bidirectional protection schemes. |
Pinout & Package
Package: SOD-323 - ultra-compact 2-pin surface-mount plastic case (2.30–2.70 mm length, 1.20–1.40 mm width, 0.25–0.35 mm thickness), cathode marked by band, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in regulation; forms reference ground for shunt regulator topology. |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated node; maintains 3.0 V above anode when reverse-biased ≥1.0 V. |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable Zener voltage distribution and long-term stability under thermal cycling. |
| SOD-323 footprint | Enables high-density PCB layouts and compatibility with standard 0805-class pick-and-place equipment. |
| Lead-free & RoHS-compliant | Meets EU Directive 2011/65/EU with matte tin plating; no intentionally added lead, halogen, or antimony. |
| Low reverse leakage | ≤50 µA at 1.0 V allows use in micropower sensor interfaces without degrading battery life. |
Applications
| Microcontroller Reset Circuit | ADC Reference Stabilization |
|---|---|
Use Scenario: Providing a stable 3.0 V threshold to trigger reset when supply drops below specification. IC Role / Device Role / Timing Role: Shunt voltage reference defining logic-high threshold for reset supervisor IC input. Use Value: Tight 3.0 V ±5% tolerance ensures predictable reset assertion across temperature and process variation. |
Use Scenario: Biasing the reference input of a 10-bit SAR ADC in portable instrumentation. IC Role / Device Role / Timing Role: Low-drift DC voltage source replacing higher-cost bandgap references where ±1% accuracy suffices. Use Value: 50 µA max leakage avoids loading reference divider network, preserving linearity and SNR. |
| LED Current Limiting | Overvoltage Clamp for GPIO |
Use Scenario: Setting constant current through indicator LEDs in automotive control panels. IC Role / Device Role / Timing Role: Series Zener element in current-source configuration with series resistor. Use Value: 200 mW rating supports up to 66 mA continuous current at 3.0 V, adequate for multi-LED strings. |
Use Scenario: Protecting 3.3 V microcontroller GPIO pins from transient overvoltage events. IC Role / Device Role / Timing Role: Reverse-biased clamping device diverting surge current to ground when VIN > 3.15 V. Use Value: Fast response (ns-scale) and 1600 Ω Zener impedance limit clamped voltage to ≤3.3 V under 10 mA transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C3V0 | Same 3.0 V nominal, but SOD-523 package (smaller); 300 mW PD; 100 Ω ZZT @ 5 mA | Higher power handling and lower impedance support tighter regulation in higher-current references. | Select when board space permits SOD-523 and improved regulation stiffness is required. |
| MMBZ5225BS | SOT-23 package; same 3.0 V rating; 350 mW PD; 1600 Ω ZZT @ 20 mA; higher thermal mass | Greater power margin and easier hand-soldering, but occupies ~3× PCB area of SOD-323. | Select when thermal robustness or manual rework capability outweighs miniaturization needs. |
Compared with BZX584-C3V0 and MMBZ5225BS, MMSZ5225BS-7 offers optimal balance of ultra-small size, proven reliability in high-volume assembly, and sufficient regulation performance for cost-sensitive consumer and industrial controls-without requiring layout redesign or thermal derating adjustments.
Availability
MMSZ5225BS-7 is available at Aetrix Electronics and suitable for microcontroller reset circuits, ADC reference stabilization, LED current limiting, and GPIO overvoltage clamping requiring stable component supply and RoHS-compliant sourcing.
Supply support for MMSZ5225BS-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.
MMSZ5221BS–MMSZ5259BS belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective voltage regulation and reference in space-constrained, high-reliability consumer and industrial applications.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The MMSZ5225BS-7 has a nominal Zener voltage of 3.0 V with a guaranteed range of 2.85 V to 3.15 V at 20 mA test current. Breakdown begins near the lower limit; applying ≥3.15 V in reverse bias ensures stable regulation. It is not rated for sustained operation above 3.15 V without current limiting.
Can this diode be used in forward-bias mode like a standard silicon diode?
Yes - its forward voltage is specified at 0.9 V @ 10 mA, matching typical silicon diode behavior. It functions reliably as a low-current rectifier or ESD protection element in forward conduction, though its primary design intent is reverse-bias Zener regulation.
How does temperature affect its Zener voltage stability?
The MMSZ5225BS-7 exhibits a positive temperature coefficient near 3.0 V, meaning VZ increases slightly with rising junction temperature. Over −65 °C to +150 °C, total drift remains within datasheet tolerance bands; no external compensation is needed for most non-precision uses.
Is this part suitable for automotive applications per AEC-Q200?
No - the MMSZ5225BS-7 is not AEC-Q200 qualified. While it operates across −65 °C to +150 °C, it lacks the stress testing, failure analysis, and traceability documentation required for automotive-grade qualification. Use AEC-Q200-compliant alternatives like BZX84-C3V0 for such applications.
MMSZ5225BS-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 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 50 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
MMSZ5225BS-7 FAQ
1.How can I place an order for MMSZ5225BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5225BS-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 MMSZ5225BS-7 reliable?
The price and inventory of MMSZ5225BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5225BS-7 is usually 5 days.
3.What payment methods are accepted for MMSZ5225BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5225BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5225BS-7?
MMSZ5225BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5225BS-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 MMSZ5225BS-7?
For technical support, including MMSZ5225BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5225BS-7 requirements.
6.How does Aetrix verify that MMSZ5225BS-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5225BS-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 MMSZ5225BS-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5225BS-7?
All MMSZ5225BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5225BS-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 MMSZ5225BS-7 part is unused and in its original packaging.
Return procedure for MMSZ5225BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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