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Diodes Incorporated MMBZ5232B-7
- Part No.:
- MMBZ5232B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- TO-236-3, SC-59, SOT-23-3
- Datasheet:
-
MMBZ5232B-7.pdf
- Description:
- DIODE ZENER 5.6V 350MW SOT23-3
- Quantity:
- Payment:
- Shipping:
Inventory:5,667
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Product details
Overview
MMBZ5232B-7 from Diodes Incorporated is a 5.6V, 350mW surface-mount Zener diode in SOT23 package, designed for precision voltage regulation and overvoltage protection in low-power analog and digital circuits. It delivers 5.32–5.88V nominal Zener voltage at 20mA test current, with 11Ω dynamic impedance and ≤5µA reverse leakage at 3.0V, enabling stable reference generation in power management and signal conditioning applications.
For engineers reviewing the MMBZ5232B-7 datasheet, MMBZ5232B-7 pinout, MMBZ5232B-7 application, or MMBZ5232B-7 equivalent, this device is selected for compact voltage clamping, ESD-tolerant biasing, and low-current reference design where thermal stability, JEDEC-compliant reliability, and RoHS/Green compliance are required.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage tolerance (±5% at 20mA), optimized for low-power regulation where self-heating must be minimized. Its planar die construction ensures consistent Zener characteristics across temperature and lifetime.
Thermal resistance of 357°C/W on FR-4 PCB enables predictable derating above +25°C ambient, and its 0.008g mass supports high-speed automated placement. The device meets JEDEC high-reliability standards and is qualified per AEC-Q200 when ordered in Q-suffix automotive variants.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.6V nominal, 5.32–5.88V range at IZT = 20mA - defines precise clamping threshold for 5V rail protection |
| Power Dissipation (PD) | 350mW on FR-4 PCB - sets maximum continuous dissipation without heatsinking in standard layout |
| Zener Impedance (ZZT) | 11Ω at f = 1kHz, IZT = 20mA - ensures minimal output voltage variation under load transients |
| Reverse Leakage (IR) | ≤5µA at VR = 3.0V - guarantees negligible standby current in battery-powered sensing nodes |
| Forward Voltage (VF) | 0.9V at IF = 10mA - enables use as low-drop rectifier or logic-level clamp in dual-role circuits |
| Operating Temperature | −65°C to +150°C - supports industrial and under-hood automotive environments without derating loss |
Pinout & Package
Package: SOT23 - ultra-compact, surface-mount plastic package with matte tin-plated Alloy 42 leadframe; UL 94V-0 rated, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode reference ground | Connected to system ground or lower-potential node during Zener operation; enables standard orientation in PCB layout |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to voltage rail requiring clamping; carries full Zener current during overvoltage events |
| No-Connect (Pin 3) | Non-functional leadframe tie-bar | Internally unconnected; must remain floating-no routing or soldering required per Diodes' mechanical drawing |
Key Features
| Feature | Design Value |
|---|---|
| Planar die construction | Ensures repeatable Zener voltage distribution and long-term parametric stability under thermal cycling |
| 350mW dissipation on FR-4 | Eliminates need for thermal vias or oversized pads in space-constrained consumer PCBs |
| Lead-free & RoHS 3 compliant | Meets global environmental regulations without compromising solder joint reliability or wetting performance |
| Halogen- and antimony-free "Green" compound | Reduces toxic gas emission during board rework or end-of-life incineration per IEC 61249-2-21 |
Applications
| USB Port ESD Protection | Microcontroller Reset Circuit |
|---|---|
|
Use Scenario: Clamps transient voltages induced on USB D+/D− lines during hot-plug or ESD events. IC Role / Device Role: Bidirectional voltage limiter placed between data line and ground. Use Value: Limits peak voltage to ≤5.88V, preventing damage to 5V-tolerant PHY transceivers while maintaining signal integrity below 480Mbps. |
Use Scenario: Generates clean, temperature-stable reset threshold for 3.3V/5V microcontrollers. IC Role / Device Role: Precision reference element in RC-based reset generator with hysteresis. Use Value: Provides ±5% voltage accuracy over −40°C to +85°C, eliminating need for external trim resistors or dedicated reset ICs. |
| Low-Power Sensor Biasing | Industrial I/O Module Protection |
|
Use Scenario: Supplies stable 5.6V bias to analog front-end op-amps and ADC references in battery-operated sensors. IC Role / Device Role: Low-current Zener shunt regulator replacing linear LDO in ultra-low-quiescent designs. Use Value: Draws only 5µA leakage at 3V, extending shelf life of coin-cell-powered IoT nodes beyond 10 years. |
Use Scenario: Protects 24V PLC analog input channels against field-wiring surges and polarity reversal. IC Role / Device Role: Primary clamping stage upstream of TVS diode and series resistor. Use Value: Absorbs up to 350mW for 100ms pulses per JEDEC derating curve, reducing stress on downstream protection components. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C5V6 | Same 5.6V nominal, but 300mW rating and higher ZZT (20Ω); SOT23 package with different marking and thermal profile | Limited to lower-power, non-automotive designs due to absence of AEC-Q200 qualification path | Select when cost sensitivity outweighs thermal margin and automotive compliance requirements |
| MMBZ5232BS-7-F | Identical electrical specs, but SOD-323 package (smaller footprint, lower thermal mass); same RoHS/Green status | Better suited for ultra-dense layouts and faster transient response, but requires tighter stencil control during reflow | Select when board area is constrained and thermal derating above 70°C is not required |
Compared with BZX84-C5V6 and MMBZ5232BS-7-F, MMBZ5232B-7 offers superior thermal robustness on FR-4 (350mW vs. 300mW), JEDEC high-reliability validation, and direct path to AEC-Q200 qualification-making it preferred for industrial and automotive-adjacent designs demanding long-term parametric stability.
Availability
MMBZ5232B-7 is available at Aetrix Electronics and suitable for USB interface protection, microcontroller reset generation, and low-power sensor biasing requiring stable component supply across production lifecycles.
Supply support for MMBZ5232B-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 semiconductor manufacturer specializing in discrete, analog, and mixed-signal solutions for power management, signal integrity, and protection applications.
This device belongs to the MMBZ52xxB family of 350mW Zener diodes engineered for high-volume, automated assembly in consumer, industrial, and automotive-qualified systems where reliability and regulatory compliance are critical.
FAQ
What is the maximum Zener test current for MMBZ5232B-7?
The specified Zener test current is 20mA, defined in the Electrical Characteristics table. This current establishes the nominal 5.6V breakdown point and is used to measure Zener impedance (11Ω) and voltage tolerance (±5%). Operation beyond 20mA requires thermal derating per Figure 1, with absolute maximum DC current limited by power dissipation (350mW) and junction temperature constraints.
Is MMBZ5232B-7 suitable for automotive applications?
Standard MMBZ5232B-7 is not AEC-Q200 qualified, but Diodes offers automotive-grade variants with Q-suffix (e.g., MMBZ5232BQ-7-F) manufactured in IATF 16949-certified facilities and PPAP-capable. These versions undergo additional stress testing and change control-required for under-hood or safety-critical modules.
How does the SOT23 package affect thermal performance?
The SOT23 package delivers 357°C/W junction-to-ambient thermal resistance on FR-4 PCB with recommended pad layout. This value assumes standard copper pour and no thermal vias; adding two 0.3mm thermal vias under the pad reduces RθJA by ~30%, enabling higher continuous current in thermally constrained designs.
Can MMBZ5232B-7 be used in forward-biased configuration?
Yes-the device exhibits 0.9V forward voltage at 10mA, making it usable as a low-drop diode in level-shifting or polarity-protection circuits. However, its primary design intent and characterization are for reverse-bias Zener operation; forward conduction parameters are secondary and not guaranteed across temperature extremes.
MMBZ5232B-7 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:
- Discontinued at Digi-Key
- Voltage - Zener (Nom) (Vz):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 350 mW
- Impedance (Max) (Zzt):
- 11 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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
MMBZ5232B-7 FAQ
1.How can I place an order for MMBZ5232B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5232B-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 MMBZ5232B-7 reliable?
The price and inventory of MMBZ5232B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5232B-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5232B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5232B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5232B-7?
MMBZ5232B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5232B-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 MMBZ5232B-7?
For technical support, including MMBZ5232B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5232B-7 requirements.
6.How does Aetrix verify that MMBZ5232B-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5232B-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 MMBZ5232B-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5232B-7?
All MMBZ5232B-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5232B-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 MMBZ5232B-7 part is unused and in its original packaging.
Return procedure for MMBZ5232B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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