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Diodes Incorporated MMBZ5252BW-7
- Part No.:
- MMBZ5252BW-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- -
- Datasheet:
-
MMBZ5252BW-7.pdf
- Description:
- DIODE ZENER 24V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:136
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Product details
Overview
MMBZ5252BW-7 from Diodes Incorporated is a 24 V, 5.2 mA test-current Zener diode in SOT323 package, rated for 200 mW power dissipation and 33 Ω dynamic impedance at 1 kHz, designed for precision voltage regulation and overvoltage protection in low-power analog and digital circuits.
For engineers reviewing the MMBZ5252BW-7 datasheet, MMBZ5252BW-7 pinout, MMBZ5252BW-7 application, or MMBZ5252BW-7 equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), reverse leakage current (≤0.1 µA at 18 V), thermal resistance (625 °C/W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled voltage regulation across its specified test current range. Its 24 V nominal Zener voltage is guaranteed between 22.8 V and 25.2 V at IZT = 5.2 mA, with dynamic impedance of 33 Ω measured at 1 kHz.
The device uses a planar epitaxial construction with matte tin-plated Alloy 42 leadframe and green molding compound compliant with RoHS, halogen-free, and antimony-free standards. It is qualified to AEC-Q101 for high-reliability automotive applications and exhibits stable performance from −65 °C to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 24 V nominal, 22.8–25.2 V range at 5.2 mA - ensures stable reference under typical bias conditions |
| Power Dissipation (PD) | 200 mW - limits continuous operating current to ~8.3 mA at 24 V without derating |
| Zener Impedance (ZZT) | 33 Ω at 1 kHz - defines AC regulation sensitivity and noise rejection capability |
| Reverse Leakage (IR) | ≤0.1 µA at 18 V - guarantees minimal standby current in voltage-clamp configurations |
| Thermal Resistance (RθJA) | 625 °C/W on FR4 board - requires careful thermal pad layout to avoid junction overheating |
| Operating Temperature | −65 °C to +150 °C - supports under-hood automotive and industrial environments |
Pinout & Package
Package: SOT323 - ultra-small surface-mount plastic case (2.10 mm × 1.30 mm × 0.90 mm), moisture sensitivity level 1, lead-free and RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal / cathode-side reference node in clamp configuration | Connected to lower-potential rail; reverse-biased during regulation |
| Cathode (Pin 2) | Zener breakdown terminal / regulated output node | Connected to protected node; maintains ~24 V above anode when reverse-biased |
| Case / Pin 3 | Non-connected internal leadframe tie point | Electrically isolated; serves mechanical anchoring only - no circuit function |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics including infotainment power rails and sensor interface protection |
| Green molding compound | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) - meets strict environmental compliance mandates |
| SOT323 footprint | Enables high-density PCB layouts and compatibility with standard 0805-sized pick-and-place equipment |
| Low leakage at VR = 18 V | 0.1 µA max - preserves battery life in always-on monitoring circuits and low-power IoT nodes |
Applications
| Automotive Sensor Interface | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 24 V CAN transceiver supply inputs against load-dump transients and ESD events. IC Role / Device Role / Timing Role: Shunt regulator clamping transient energy to limit voltage excursion to ≤25.2 V. Use Value: Prevents damage to downstream PHY ICs while maintaining signal integrity during ISO 7637-2 pulse 5a events. | Use Scenario: Stabilizing reference voltage for 24 V DC input modules in programmable logic controllers. IC Role / Device Role / Timing Role: Precision voltage reference for ADC biasing and comparator threshold setting. Use Value: Ensures ±0.5% measurement accuracy over temperature due to tight 5% VZ tolerance and low tempco. |
| IoT Node Power Monitoring | Medical Diagnostic Equipment Biasing |
Use Scenario: Providing stable 24 V reference for battery voltage sensing in wireless edge sensors. IC Role / Device Role / Timing Role: Low-leakage Zener source for resistive divider networks in ultra-low-power sleep modes. Use Value: Enables <100 nA total quiescent current contribution, extending coin-cell battery life beyond 5 years. | Use Scenario: Generating clean bias for op-amps in portable ultrasound front-end signal conditioning. IC Role / Device Role / Timing Role: Low-noise voltage reference for analog signal chain calibration. Use Value: Delivers <10 µVpp broadband noise and stable regulation despite varying ambient temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C24LT1G | Same 24 V nominal, but 350 mW rating and SOT23 package; ZZT = 40 Ω at 5 mA | Higher power handling allows higher surge current; larger footprint may impact layout density | Select when >200 mW transient absorption is required and SOT23 is acceptable |
| MMSZ5252ET1G | 24 V Zener in SOD-123; 500 mW rating; ZZT = 30 Ω at 20 mA; leakage 0.1 µA at 18 V | Higher power and different package - suited for manual repair or high-surge industrial designs | Choose for legacy SOD-123 board compatibility or where thermal mass improves transient robustness |
Compared with BZX84-C24LT1G and MMSZ5252ET1G, MMBZ5252BW-7 offers the smallest footprint (SOT323), AEC-Q101 qualification, and optimized low-leakage performance at 5.2 mA - making it preferred for space-constrained, automotive-qualified, and ultra-low-power designs.
Availability
MMBZ5252BW-7 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC input protection, and IoT node power monitoring requiring stable component supply and long-term lifecycle support.
Supply support for MMBZ5252BW-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.
The MMBZ52xxBW series belongs to Diodes' precision Zener diode product line, engineered specifically for high-reliability voltage reference and overvoltage protection in automotive, industrial, and medical applications where compact size and environmental compliance are critical.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The MMBZ5252BW-7 has a nominal Zener voltage of 24 V, with a guaranteed breakdown range of 22.8 V to 25.2 V at 5.2 mA test current. Below 22.8 V, reverse leakage remains ≤0.1 µA at 18 V - meaning it does not conduct significantly until reaching its specified Zener threshold.
Is this part suitable for use in automotive applications?
Yes - MMBZ5252BW-7 is explicitly qualified to AEC-Q101 standards, tested for temperature cycling, humidity, mechanical shock, and high-temperature operating life. Its −65 °C to +150 °C operating range and green, halogen-free construction meet automotive electronics requirements for under-hood and cabin modules.
How does the SOT323 package affect thermal performance?
The SOT323 package delivers a junction-to-ambient thermal resistance of 625 °C/W on FR4 PCBs with recommended pad layout. This means at 200 mW dissipation, junction temperature rises ~125 °C above ambient - so derating is essential above +25 °C ambient, especially in enclosed enclosures or stacked boards.
Can this Zener be used in place of a 24 V TVS diode for ESD protection?
No - while MMBZ5252BW-7 provides precise voltage clamping, it lacks the peak pulse power rating (e.g., 400 W for 8/20 µs) and fast response time of dedicated TVS diodes. It is intended for steady-state regulation and low-energy transients, not IEC 61000-4-2 ESD or ISO 10605 surge suppression.
MMBZ5252BW-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- *
- Package/Case:
- -
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- -
- Tolerance:
- -
- Power - Max:
- -
- Impedance (Max) (Zzt):
- -
- Current - Reverse Leakage @ Vr:
- -
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MMBZ5252BW-7 FAQ
1.How can I place an order for MMBZ5252BW-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5252BW-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 MMBZ5252BW-7 reliable?
The price and inventory of MMBZ5252BW-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5252BW-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5252BW-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5252BW-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5252BW-7?
MMBZ5252BW-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5252BW-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 MMBZ5252BW-7?
For technical support, including MMBZ5252BW-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5252BW-7 requirements.
6.How does Aetrix verify that MMBZ5252BW-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5252BW-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 MMBZ5252BW-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5252BW-7?
All MMBZ5252BW-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5252BW-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 MMBZ5252BW-7 part is unused and in its original packaging.
Return procedure for MMBZ5252BW-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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