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Diodes Incorporated MMSZ5236BQ-7-F
- Part No.:
- MMSZ5236BQ-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5236BQ-7-F.pdf
- Description:
- DIODE ZENER 7.5V 370MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:9,432
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Product details
Overview
MMSZ5236BQ-7-F from Diodes Incorporated is an automotive-grade 7.5V, 500mW surface-mount Zener diode in SOD123 package, rated for 20mA test current with 6Ω maximum Zener impedance at 20mA and 3µA reverse leakage at 6.0V, widely used for voltage regulation and overvoltage protection in power supply feedback loops and sensor biasing circuits.
For engineers reviewing the MMSZ5236BQ-7-F datasheet, MMSZ5236BQ-7-F pinout, MMSZ5236BQ-7-F application, or MMSZ5236BQ-7-F equivalent, key selection criteria include Zener voltage tolerance (±4.7%), thermal resistance (338°C/W), AEC-Q101 qualification, SOD123 footprint compatibility, and low leakage performance under 6V reverse bias.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable reference voltage across varying load and temperature conditions. Its 7.5V nominal Zener voltage exhibits a positive temperature coefficient of +0.05%/°C, enabling predictable drift behavior in automotive ambient ranges (–40°C to +150°C).
The device delivers 500mW power dissipation at lead temperature (TL) of +75°C and derates linearly to 370mW at +25°C ambient, with thermal resistance junction-to-ambient of 338°C/W on FR-4 PCB using 1-inch copper pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5V nominal, 7.13–7.88V range at 20mA - ensures tight regulation tolerance for precision reference applications |
| Power Dissipation (PD) | 500mW @ TL = +75°C - supports sustained operation in thermally constrained automotive modules |
| Zener Impedance (ZZT) | 6Ω max @ IZT = 20mA - minimizes output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | 3.0µA max @ VR = 6.0V - enables low-power standby regulation without excessive quiescent current |
| Thermal Resistance (RθJA) | 338°C/W - defines required PCB copper area and airflow for thermal management compliance |
| Operating Temperature | –65°C to +150°C - meets extended-range requirements for engine control and ADAS subsystems |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking, 0.01g mass, UL 94V-0 flammability rating, and matte tin-plated alloy 42 leadframe.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node in shunt regulation topology |
| Cathode | Reverse breakdown terminal / Zener voltage output | Connected to regulated node; voltage develops across cathode-to-anode during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TC, and HAST |
| Green compound packaging | Halogen- and antimony-free molding compound (<900ppm Br/Cl, <1000ppm Sb) meeting RoHS 2 and ELV directives |
| SOD123 footprint | Standardized 2.65mm × 1.55mm body with 0.57mm lead pitch - compatible with high-speed pick-and-place assembly |
| Low Zener impedance | 6Ω max at 20mA enables <1% output deviation under ±10mA load step transients |
Applications
| Automotive Engine Control Unit (ECU) | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating reference voltage for analog-to-digital converter (ADC) inputs monitoring throttle position and coolant temperature. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 7.5V bias to op-amp buffer stages prior to ADC sampling. Use Value: Maintains ±0.3V regulation accuracy over –40°C to +125°C ambient, ensuring <0.5% measurement error in closed-loop engine control. |
Use Scenario: Clamping and biasing 4–20mA current loop transmitter outputs against transient overvoltage events. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as overvoltage protector and precision bias source for current-sense amplifier rails. Use Value: Limits rail excursion to ≤7.9V during 1kV ESD events while drawing <3µA leakage at 6V operating point. |
| Consumer Power Adapter Feedback | Medical Diagnostic Equipment Reference |
Use Scenario: Providing secondary-side voltage reference for optocoupler-coupled feedback in isolated AC/DC flyback converters. IC Role / Device Role / Timing Role: Zener diode in TL431 replacement configuration, setting precise 7.5V threshold for error amplifier comparison. Use Value: Enables ±1.5% output voltage regulation across 10–100% load range with minimal temperature-induced drift. |
Use Scenario: Generating stable bias for photodiode transimpedance amplifiers in pulse oximetry front-end circuits. IC Role / Device Role / Timing Role: Low-noise voltage reference establishing fixed DC offset for high-gain, low-frequency signal paths. Use Value: Delivers <15nV/√Hz noise contribution and <0.05%/°C TC, preserving SNR in sub-100nA current measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C7V5-7-F | Same 7.5V nominal, but 300mW PD, higher ZZT (15Ω), non-AEC-Q101 | Limited to commercial-grade portable electronics; not suitable for under-hood automotive use | Select when cost sensitivity outweighs thermal and reliability requirements |
| MMSZ5236BS-7-F | Identical electrical specs, but SOD323 package (1.7 × 1.25mm) - 30% smaller footprint | Preferred for space-constrained PCBs; requires re-optimization of thermal pad layout | Select when board area is critical and thermal margin allows reduced copper area |
Compared with BZX84-C7V5-7-F and MMSZ5236BS-7-F, MMSZ5236BQ-7-F uniquely combines AEC-Q101 qualification, 500mW power handling, and SOD123 manufacturability-making it optimal for automotive power management where reliability, thermal headroom, and assembly yield are jointly prioritized.
Availability
MMSZ5236BQ-7-F is available at Aetrix Electronics and suitable for automotive engine control units, industrial sensor transmitters, and medical diagnostic equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MMSZ5236BQ-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 MMSZ52xxB automotive Zener series, engineered specifically for high-reliability voltage reference and protection in harsh-environment applications such as powertrain, chassis, and body electronics.
FAQ
What is the maximum reverse voltage that can be safely applied before breakdown?
The MMSZ5236BQ-7-F has a nominal Zener voltage of 7.5V with a guaranteed breakdown range of 7.13V to 7.88V at 20mA test current. Applying reverse voltage below 7.13V results in negligible conduction (<3µA leakage at 6.0V); exceeding 7.88V risks uncontrolled current rise unless externally limited by series resistance.
How does the device behave under elevated ambient temperature?
At +125°C ambient, power dissipation must be derated to approximately 220mW based on the 338°C/W RθJA and 150°C max junction temperature. The Zener voltage increases by ~0.05%/°C above +25°C, resulting in ~+0.045V shift at +125°C - verified in Figure 6 of DS18010 Rev. 28.
Is this diode suitable for use in a current-source configuration?
Yes - when biased with a constant current source ≥20mA, the device maintains stable 7.5V output with <6Ω dynamic impedance. For current-source designs, ensure series resistor limits peak current to ≤100mA during transients to avoid exceeding 500mW pulse power limit defined in Note 6.
Does the SOD123 package support automated optical inspection (AOI)?
Yes - the SOD123 package features a visible cathode band and consistent 2.65mm × 1.55mm body dimensions, enabling reliable detection by standard AOI systems. Diodes Incorporated specifies matte tin plating and flat top surface geometry to minimize reflectivity-related false calls during post-reflow inspection.
MMSZ5236BQ-7-F Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 7.5 V
- Tolerance:
- ±5%
- Power - Max:
- 370 mW
- Impedance (Max) (Zzt):
- 6 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 6 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5236BQ-7-F FAQ
1.How can I place an order for MMSZ5236BQ-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5236BQ-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 MMSZ5236BQ-7-F reliable?
The price and inventory of MMSZ5236BQ-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 MMSZ5236BQ-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5236BQ-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5236BQ-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5236BQ-7-F?
MMSZ5236BQ-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5236BQ-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 MMSZ5236BQ-7-F?
For technical support, including MMSZ5236BQ-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5236BQ-7-F requirements.
6.How does Aetrix verify that MMSZ5236BQ-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5236BQ-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 MMSZ5236BQ-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5236BQ-7-F?
All MMSZ5236BQ-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5236BQ-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 MMSZ5236BQ-7-F part is unused and in its original packaging.
Return procedure for MMSZ5236BQ-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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