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Diodes Incorporated MMSZ5236B-7-F
- Part No.:
- MMSZ5236B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5236B-7-F.pdf
- Description:
- DIODE ZENER 7.5V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:48,003
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Product details
Overview
MMSZ5236B-7-F from Diodes Incorporated is a 7.5V, 500mW surface-mount Zener diode in SOD-123 package, rated for 20mA test current with 6Ω dynamic impedance at 1kHz and 3μA reverse leakage at 6.0V, widely used for voltage regulation and reference in power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the MMSZ5236B-7-F datasheet, MMSZ5236B-7-F pinout, MMSZ5236B-7-F application, or MMSZ5236B-7-F equivalent, key selection criteria include nominal Zener voltage tolerance (±4.7%), thermal resistance (338°C/W), AEC-Q101 qualification status, RoHS/Green compliance, and SOD-123 footprint compatibility with automated assembly processes.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. It delivers 7.5V nominal regulation with ±4.7% tolerance (7.13–7.88V) at 20mA test current and exhibits low dynamic impedance (6Ω @ 1kHz) for tight voltage control in precision references.
Designed for commercial-grade reliability, it features a matte tin-plated alloy-42 leadframe, UL 94V-0 molded plastic case, and moisture sensitivity level 1. Its thermal derating curve specifies 500mW dissipation at 75°C lead temperature and 370mW at 25°C ambient on FR-4 PCB with 1-inch copper pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5V nominal, 7.13–7.88V range at 20mA - ensures stable reference within ±4.7% for feedback networks |
| Power Dissipation (PD) | 370mW @ TA = 25°C - defines maximum continuous power on standard PCB layout |
| Zener Impedance (ZZT) | 6Ω @ 1kHz, IZT = 20mA - enables low AC ripple rejection in regulated supplies |
| Reverse Leakage (IR) | 3.0μA @ VR = 6.0V - minimizes quiescent current loss in high-impedance bias networks |
| Thermal Resistance (RθJA) | 338°C/W - determines junction-to-ambient temperature rise under load |
| Package | SOD-123 - compact 2-pin surface-mount outline compatible with pick-and-place and reflow |
| Qualification | AEC-Q101 qualified - validated for automotive-grade reliability and stress endurance |
Pinout & Package
SOD-123 package: 2-terminal surface-mount device with cathode band marking; anode and cathode pins aligned along body length, 2.65mm width, 3.65mm height, 1.55mm length, 0.57mm lead width.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener reference ground node | Connected to circuit common or lower-potential rail; establishes reference polarity for regulation |
| Cathode | Reverse-biased Zener terminal / regulated output node | Connected to voltage source via current-limiting resistor; provides stable 7.5V output when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| 500mW Power Rating at TL = 75°C | Supports higher transient power handling in thermally constrained layouts without derating |
| AEC-Q101 Qualification | Validated for automotive electronics including infotainment power rails and sensor interface references |
| Halogen- and Antimony-Free "Green" Compound | Meets strict environmental compliance (Br+Cl <1500ppm, Sb <1000ppm) for global OEM requirements |
| Moisture Sensitivity Level 1 | Enables direct use from dry pack without baking-reduces manufacturing overhead in high-volume SMT lines |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler-coupled feedback. IC Role / Device Role: Zener reference for TL431-like shunt regulator or direct feedback node clamp. Use Value: 7.5V nominal voltage and 6Ω impedance ensure stable loop response and minimal output drift across line/load variations. | Use Scenario: Protecting microcontroller I/O pins from ESD-induced transients exceeding 6V. IC Role / Device Role: Low-leakage (3μA @ 6V) clamping diode placed between signal line and ground. Use Value: Fast turn-on in reverse breakdown limits voltage excursion to ≤7.88V while drawing negligible standby current. |
| Industrial Sensor Reference | Automotive Body Control Module |
Use Scenario: Providing stable excitation voltage for resistive bridge sensors in 24V industrial PLC analog inputs. IC Role / Device Role: Precision voltage reference for ADC biasing and ratiometric measurement calibration. Use Value: ±4.7% tolerance and AEC-Q101 qualification enable repeatable 12-bit measurement accuracy across -40°C to +125°C. | Use Scenario: Voltage monitoring and reset generation in 12V battery-supplied BCM submodules. IC Role / Device Role: Zener-based undervoltage lockout (UVLO) threshold element feeding comparator input. Use Value: Stable 7.5V reference with low TC (≈+0.04%/°C per Fig.6) ensures consistent trip point across engine bay temperatures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C7V5 | Same 7.5V nominal, but 300mW rating and SOD-323 package - smaller footprint, lower power handling | Preferred for space-constrained portable designs; not suitable for >300mW sustained loads | Select when board area is critical and thermal budget allows lower PD |
| 1N4734A | 7.5V, 1W rating in DO-41 through-hole package - higher power, no SMT compatibility | Used in legacy prototyping or high-reliability through-hole power supplies | Select only if through-hole assembly is required and thermal design supports 1W dissipation |
Compared with BZX584C7V5 and 1N4734A, MMSZ5236B-7-F uniquely balances SMT manufacturability, AEC-Q101 qualification, and 370mW ambient-rated power in the industry-standard SOD-123 footprint-making it optimal for automotive and industrial surface-mount power management.
Availability
MMSZ5236B-7-F is available at Aetrix Electronics and suitable for switch-mode power supply feedback, overvoltage protection clamp, and industrial sensor reference applications requiring stable component supply and automotive-grade reliability.
Supply support for MMSZ5236B-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.
The MMSZ52xxB series belongs to Diodes' general-purpose Zener diode product line, engineered for cost-effective, high-yield voltage regulation in commercial and automotive power management systems.
FAQ
What is the maximum reverse voltage (VR) that MMSZ5236B-7-F can withstand before breakdown?
The device is specified to exhibit ≤3.0μA reverse leakage at VR = 6.0V. Breakdown begins near its nominal Zener voltage of 7.5V, with full regulation established at 20mA test current. It is not rated for sustained operation above 7.88V (max VZ), and operation beyond this risks thermal runaway under unregulated current conditions.
Is MMSZ5236B-7-F suitable for use in automotive applications?
Yes - it is explicitly qualified to AEC-Q101 standards, confirming performance across -40°C to +150°C operating temperature, robustness against mechanical shock/vibration, and reliability under high-temperature humidity bias testing. Its SOD-123 package and green molding compound meet automotive OEM material compliance requirements.
How does the 338°C/W thermal resistance affect PCB layout design?
This RθJA value assumes a standard FR-4 board with 1-inch² copper pad. To maintain safe junction temperature, designers must limit power dissipation or increase copper area: at 370mW ambient-rated power, ΔTJA ≈ 125°C - so with TA = 75°C, TJ reaches 200°C, exceeding absolute max. Derating or enhanced heatsinking is essential for sustained operation.
Can MMSZ5236B-7-F replace MMSZ5235B (6.8V) in an existing design?
No - the 7.5V nominal voltage differs by 10% from the 6.8V part, altering feedback loop setpoints and potentially causing overvoltage or undervoltage conditions. Circuit recalibration, resistor network adjustment, and stability verification are required. The SOD-123 footprint is identical, but electrical substitution is not drop-in.
MMSZ5236B-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:
- 500 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
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5236B-7-F FAQ
1.How can I place an order for MMSZ5236B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5236B-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 MMSZ5236B-7-F reliable?
The price and inventory of MMSZ5236B-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 MMSZ5236B-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5236B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5236B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5236B-7-F?
MMSZ5236B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5236B-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 MMSZ5236B-7-F?
For technical support, including MMSZ5236B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5236B-7-F requirements.
6.How does Aetrix verify that MMSZ5236B-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5236B-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 MMSZ5236B-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5236B-7-F?
All MMSZ5236B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5236B-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 MMSZ5236B-7-F part is unused and in its original packaging.
Return procedure for MMSZ5236B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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