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Diodes Incorporated MMBZ5252BW-7-F
- Part No.:
- MMBZ5252BW-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SC-70, SOT-323
- Datasheet:
-
MMBZ5252BW-7-F.pdf
- Description:
- DIODE ZENER 24V 200MW SOT323
- Quantity:
- Payment:
- Shipping:
Inventory:4,864
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Product details
Overview
MMBZ5252BW-7-F 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, used for precision voltage regulation and overvoltage protection in low-power analog and digital supply rails.
For engineers reviewing the MMBZ5252BW-7-F datasheet, MMBZ5252BW-7-F pinout, MMBZ5252BW-7-F application, or MMBZ5252BW-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±5%), reverse leakage current at 18 V (≤0.1 μA), thermal resistance (625 °C/W), and AEC-Q101 qualification for automotive-grade reliability.
Technical Context
This device operates as a two-terminal voltage reference with sharp reverse breakdown at 24 V ±5% under 5.2 mA test current. Its 33 Ω Zener impedance at 1 kHz ensures stable regulation under small-signal load variations, while its 625 °C/W junction-to-ambient thermal resistance defines derating behavior above +25°C ambient.
The SOT323 package enables high-density PCB layout and compatibility with automated reflow assembly. With ≤0.1 μA reverse leakage at VR = 18 V and full AEC-Q101 qualification, it supports fail-safe biasing and clamping in automotive body electronics and industrial sensor interfaces.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 24 V nominal, 22.8–25.2 V range at 5.2 mA - sets precise clamping threshold for 24 V rail protection |
| Power Dissipation | 200 mW at +25°C - limits continuous clamp energy in transient suppression circuits |
| Zener Impedance | 33 Ω at 1 kHz - determines output voltage deviation under dynamic load changes |
| Reverse Leakage | ≤0.1 μA at VR = 18 V - ensures minimal quiescent current in always-on bias networks |
| Thermal Resistance | 625 °C/W - requires derating to ~125 mW at +85°C ambient for sustained operation |
| Package | SOT323 - 2.1 mm × 1.3 mm footprint, compatible with standard 0805 land patterns |
Pinout & Package
SOT323 package: 3-terminal surface-mount case with anode (pin 1), cathode (pin 2), and no internal connection at pin 3 (dummy lead); molded green compound, matte tin-plated terminals, moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Forward conduction terminal | Connected to lower-potential node during Zener operation; required for correct polarity in shunt regulation |
| Cathode (Pin 2) | Zener breakdown terminal | Connected to higher-potential node; carries regulated voltage reference or clamped signal |
| Pin 3 | No internal connection | Mechanical support only; must remain unconnected in PCB layout to avoid parasitic coupling |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood and body control modules requiring high-reliability discrete components |
| Green molding compound | Halogen- and antimony-free (<900 ppm Br/Cl, <1000 ppm Sb) meeting RoHS 2 and ELV requirements |
| Low leakage at 18 V | ≤0.1 μA reverse current enables use in ultra-low-power sensor biasing without compromising battery life |
| Lead-free plating | Matte tin over Alloy 42 leadframe, solderable per MIL-STD-202 Method 208, compatible with Pb-free reflow profiles |
Applications
| Automotive Body Control Unit (BCU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage clamping on LIN bus transceiver supply line exposed to load-dump transients. IC Role / Device Role / Timing Role: Shunt Zener regulator protecting 24 V input stage from >30 V surges. Use Value: Maintains <25.2 V clamping threshold with ≤33 Ω impedance, limiting peak stress on downstream LDOs. | Use Scenario: Precision biasing of bridge-based pressure sensor output amplifier. IC Role / Device Role / Timing Role: Stable 24 V reference source for op-amp VCC and excitation current generation. Use Value: Delivers <0.1 μA leakage at 18 V, preventing offset drift in microvolt-level differential measurements. |
| Medical Portable Diagnostic Device | Smart Home Energy Monitor |
Use Scenario: Overvoltage protection on USB-C PD negotiation interface powered from 24 V adapter. IC Role / Device Role / Timing Role: Fast-response clamp limiting VBUS surge to safe levels before protection IC triggers. Use Value: Responds within nanoseconds due to low junction capacitance (~2 pF), preserving communication integrity. | Use Scenario: Reference stabilization for isolated ADC measuring mains-derived 24 V auxiliary supply. IC Role / Device Role / Timing Role: Low-drift voltage reference enabling ±0.5% measurement accuracy over temperature. Use Value: 5% Zener tolerance and 625 °C/W RθJA allow calibration compensation across –40°C to +85°C operating range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C24LT1G | Same 24 V nominal, but 350 mW rating and SOT23 package; 40 Ω ZZT at 5 mA | Higher power handling suits intermittent surge clamping; larger footprint may limit high-density layouts | Select when >200 mW pulse energy absorption is required and board space permits SOT23 |
| MMBZ5252BS-7-F | Identical electrical specs, but SOT363 dual-diode variant with shared cathode configuration | Enables dual-rail clamping (e.g., ±12 V) in same footprint; not suitable for single-diode replacement | Choose only for designs needing two matched Zeners; not a drop-in substitute for single-device use |
Compared with BZX84-C24LT1G and MMBZ5252BS-7-F, MMBZ5252BW-7-F offers optimal balance of AEC-Q101 compliance, compact SOT323 size, and low-leakage performance for space-constrained automotive and industrial 24 V regulation-without sacrificing reliability or manufacturability.
Availability
MMBZ5252BW-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, portable medical diagnostics, and smart home energy monitoring systems requiring stable component supply and long-term lifecycle support.
Supply support for MMBZ5252BW-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 analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
This part belongs to the MMBZ52xxBW series of 200 mW Zener diodes designed specifically for high-reliability, space-constrained voltage regulation and transient protection in automotive, industrial, and consumer applications.
FAQ
What is the maximum reverse voltage this Zener can withstand before breakdown?
The MMBZ5252BW-7-F has a nominal Zener voltage of 24 V with a guaranteed range of 22.8 V to 25.2 V at 5.2 mA test current. Below 22.8 V, it remains in high-impedance reverse-blocking mode with ≤0.1 μA leakage at 18 V. Breakdown is gradual and non-destructive within its 200 mW power limit.
Is this part suitable for use in automotive applications?
Yes. The MMBZ5252BW-7-F is fully qualified to AEC-Q101 standards, including temperature cycling, humidity testing, and mechanical shock. Its green molding compound, lead-free plating, and operation from –65°C to +150°C make it approved for under-hood and body control module deployments.
How does the SOT323 package affect thermal performance?
The SOT323 package delivers 625 °C/W junction-to-ambient thermal resistance on FR4 PCB with recommended pad layout. At +85°C ambient, maximum allowable power drops to ~125 mW. Layout optimization-such as copper pour under the thermal pad-can improve heat dissipation by up to 25%.
Can this Zener be used in place of a 24 V TVS diode for ESD protection?
No. While it provides steady-state voltage regulation, the MMBZ5252BW-7-F lacks the low clamping voltage and high peak pulse power capability of dedicated TVS devices. For IEC 61000-4-2 ESD protection, use a TVS like PESD5V0S1BA-AX, which clamps below 15 V at 8 kV contact discharge.
MMBZ5252BW-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SC-70, SOT-323
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 33 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 18 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-323
MMBZ5252BW-7-F FAQ
1.How can I place an order for MMBZ5252BW-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5252BW-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 MMBZ5252BW-7-F reliable?
The price and inventory of MMBZ5252BW-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 MMBZ5252BW-7-F is usually 5 days.
3.What payment methods are accepted for MMBZ5252BW-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5252BW-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5252BW-7-F?
MMBZ5252BW-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5252BW-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 MMBZ5252BW-7-F?
For technical support, including MMBZ5252BW-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5252BW-7-F requirements.
6.How does Aetrix verify that MMBZ5252BW-7-F is sourced from the original manufacturer or authorized distributors?
All MMBZ5252BW-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 MMBZ5252BW-7-F meets industry standards.
7.What is the process for return or replacement of MMBZ5252BW-7-F?
All MMBZ5252BW-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5252BW-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 MMBZ5252BW-7-F part is unused and in its original packaging.
Return procedure for MMBZ5252BW-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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