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Diodes Incorporated MMBZ5228B-7-F
- Part No.:
- MMBZ5228B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5228B-7-F.pdf
- Description:
- DIODE ZENER 3.9V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,096
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Product details
Overview
MMBZ5228B-7-F from Diodes Incorporated is a 3.9 V, 350 mW surface-mount Zener diode in SOT23 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 provides precision voltage regulation in low-power analog reference and overvoltage protection circuits on FR-4 PCBs.
For engineers reviewing the MMBZ5228B-7-F datasheet, MMBZ5228B-7-F pinout, MMBZ5228B-7-F application, or MMBZ5228B-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5.1%), thermal resistance (357 °C/W), JEDEC-compliant reliability, RoHS/Green compliance, and SOT23 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 and temperature conditions. Its planar die construction ensures consistent breakdown characteristics and low parameter drift over time.
Designed for use as a shunt regulator or voltage reference, it delivers specified Zener voltage (3.71–4.10 V) at 20 mA test current, with dynamic impedance of 23 Ω at IZT and 1900 Ω at IZK = 0.25 mA, enabling predictable clamping behavior in signal conditioning and power rail stabilization.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Nominal) | 3.9 V - Stable reference voltage at 20 mA test current, ±5.1% tolerance band (3.71–4.10 V). |
| Power Dissipation | 350 mW - Maximum continuous power on FR-4 PCB with recommended pad layout; derates linearly above +25°C ambient. |
| Zener Impedance | 23 Ω @ 1 kHz, 20 mA - Low dynamic impedance ensures minimal output voltage variation under changing load current. |
| Reverse Leakage Current | 10 µA @ 1.0 V - Confirms tight blocking behavior below breakdown threshold, critical for low-quiescent-current bias networks. |
| Thermal Resistance | 357 °C/W - Junction-to-ambient value enables thermal design margin estimation for PCB layout and airflow planning. |
| Operating Temperature | −65 to +150 °C - Wide range supports industrial and automotive under-hood applications without derating penalties. |
Pinout & Package
Package: SOT23 - Three-terminal surface-mount plastic package with matte tin-plated Alloy 42 leadframe, UL 94V-0 rated molding compound, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / Cathode reference ground path | Connected to lower-potential node in shunt configuration; defines polarity for reverse-bias operation. |
| Cathode (Pin 2) | Zener breakdown terminal / Voltage regulation node | Connected to regulated rail; carries full Zener current during clamping; requires current-limiting resistor. |
| No-Connect (Pin 3) | Internal die attach / Mechanical support only | Electrically isolated; serves structural role in SOT23 mold; must not be connected in circuit layout. |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable Zener voltage distribution and long-term stability under thermal cycling and humidity stress. |
| 350 mW dissipation on FR-4 | Validated power handling without heatsink; enables compact board space usage in cost-sensitive consumer and industrial designs. |
| Lead-free & RoHS 3 compliant | Fully compliant with EU Directive 2015/863/EU; contains <900 ppm Br/Cl and <1000 ppm Sb-meets "Green" device definition. |
| SOT23 tape-and-reel packaging | 3,000-unit reels compatible with high-speed pick-and-place machines; supports JIT manufacturing and automated optical inspection. |
Applications
| Industrial Sensor Signal Conditioning | USB Port Overvoltage Protection |
|---|---|
|
Use Scenario: Stabilizing reference voltage for 12-bit ADC front-end in temperature/humidity sensor modules operating from unregulated 5 V rails. IC Role / Device Role / Timing Role: Shunt voltage reference providing 3.9 V bias point for op-amp gain-setting network and ADC input scaling. Use Value: Maintains ±0.5% reference accuracy over −40 to +85°C due to low tempco and 23 Ω ZZT, reducing calibration overhead. |
Use Scenario: Clamping transient surges on USB D+ line caused by ESD events or hot-plug incompatibility. IC Role / Device Role / Timing Role: Fast-response overvoltage clamp limiting D+ to ≤4.1 V during 8 kV HBM ESD strikes. Use Value: 10 µA leakage at 1.0 V prevents signal distortion during normal 3.3 V data transmission while triggering reliably at 3.71 V. |
| Low-Power IoT Node Power Management | Automotive Body Control Module Reference |
|
Use Scenario: Generating stable 3.9 V supply for ultra-low-power microcontroller reset circuitry in battery-operated BLE sensors. IC Role / Device Role / Timing Role: Passive voltage supervisor element enabling POR (power-on reset) with defined threshold hysteresis via resistor divider. Use Value: 350 mW rating allows safe operation at 20 mA peak current during brown-out recovery without thermal runaway. |
Use Scenario: Providing calibrated reference for LIN bus transceiver biasing in door module ECUs exposed to under-hood thermal extremes. IC Role / Device Role / Timing Role: Precision voltage reference for internal LDO feedback network ensuring stable 5 V LIN supply across −40 to +125°C. Use Value: AEC-Q200-compatible process and −65 to +150°C rating ensure functional integrity where automotive-grade reliability is mandated. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C3V9 (Nexperia) | Same 3.9 V nominal, 300 mW rating, SOT23 package; higher ZZT = 90 Ω and 50 µA leakage at 1 V. | Lower precision regulation; suitable for non-critical biasing but not for ADC references requiring low noise. | Select when cost is primary constraint and ±10% voltage tolerance is acceptable. |
| MM3Z3V9 (ON Semiconductor) | 3.9 V nominal, 300 mW, SOT23; tighter 3% tolerance (3.78–4.02 V); ZZT = 20 Ω but only rated at 5 mA test current. | Better initial accuracy but lower power headroom; may require derating in sustained 20 mA applications. | Prefer for high-accuracy references where average current stays ≤5 mA and thermal budget is constrained. |
Compared with BZX84-C3V9 and MM3Z3V9, MMBZ5228B-7-F offers superior balance of power capability (350 mW), low dynamic impedance (23 Ω at 20 mA), and industrial temperature range - making it optimal for sustained-shunt regulation in embedded control and sensing systems.
Availability
MMBZ5228B-7-F is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, USB port overvoltage protection, and low-power IoT node power management requiring stable component supply and JEDEC-compliant reliability.
Supply support for MMBZ5228B-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 ICs, specializing in high-reliability components for industrial, automotive, and consumer markets with ISO/TS 16949 and IATF 16949 certified facilities.
This device belongs to Diodes' MMBZ52xxB series of 350 mW Zener diodes, engineered for precision voltage regulation in space-constrained, high-volume surface-mount applications demanding RoHS/Green compliance and automated assembly readiness.
FAQ
What is the maximum continuous Zener current for MMBZ5228B-7-F at +25°C ambient?
The device supports up to 20 mA continuous Zener current at +25°C ambient when mounted on FR-4 PCB with recommended pad layout. At this current, it delivers nominal 3.9 V regulation with 23 Ω dynamic impedance. Derating begins above +25°C per the 357 °C/W thermal resistance curve shown in Figure 1 of DS18011 Rev. 26-2.
Is MMBZ5228B-7-F qualified for automotive applications?
MMBZ5228B-7-F itself is not AEC-Q200 qualified; however, Diodes offers automotive-grade equivalents with Q-suffix (e.g., MMBZ5228BQ-7-F) manufactured in IATF 16949-certified facilities and PPAP-capable. These variants undergo extended stress testing and change control per automotive requirements.
How does the SOT23 pinout map to cathode/anode for MMBZ5228B-7-F?
In top-view orientation with marking dot at top-left, Pin 1 is Anode, Pin 2 is Cathode, and Pin 3 is internally unconnected. This matches standard SOT23 Zener orientation used across Diodes' MMBZ series and is confirmed in the "Top View Device Schematic" on page 2 of DS18011.
Can MMBZ5228B-7-F replace MMBZ5234B-7-F in a 6.2 V circuit?
No - MMBZ5228B-7-F has a nominal Zener voltage of 3.9 V (3.71–4.10 V range), while MMBZ5234B-7-F is rated at 6.2 V (5.89–6.51 V). Substituting them would cause incorrect regulation or failure to clamp at intended voltage thresholds; voltage-specific Zeners are not interchangeable without circuit redesign.
MMBZ5228B-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- TO-236-3, SC-59, SOT-23-3
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 350 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:
- SOT-23-3
MMBZ5228B-7-F FAQ
1.How can I place an order for MMBZ5228B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5228B-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 MMBZ5228B-7-F reliable?
The price and inventory of MMBZ5228B-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 MMBZ5228B-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5228B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5228B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5228B-7-F?
MMBZ5228B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5228B-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 MMBZ5228B-7-F?
For technical support, including MMBZ5228B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5228B-7-F requirements.
6.How does Aetrix verify that MMBZ5228B-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5228B-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 MMBZ5228B-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5228B-7-F?
All MMBZ5228B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5228B-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 MMBZ5228B-7-F part is unused and in its original packaging.
Return procedure for MMBZ5228B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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