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Diodes Incorporated MMSZ5236B-7
- Part No.:
- MMSZ5236B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5236B-7.pdf
- Description:
- DIODE ZENER 7.5V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:8,910
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Product details
Overview
MMSZ5236B-7 from Diodes Incorporated is a 500mW surface-mount Zener diode with a nominal zener voltage of 7.5V (±4.9% tolerance), 6Ω dynamic impedance at 20mA test current, and 3.0µA maximum reverse leakage at 6.0V. It operates across –65°C to +150°C and is housed in the SOD123 package, commonly used for voltage regulation and reference in power supply feedback loops.
For engineers reviewing the MMSZ5236B-7 datasheet, MMSZ5236B-7 pinout, MMSZ5236B-7 application, or MMSZ5236B-7 equivalent, this device serves as a precision low-power voltage clamp in analog sensing circuits, microcontroller reset supervision, and overvoltage protection stages where stable 7.5V reference and low thermal drift are required.
Technical Context
This Zener diode functions as a two-terminal voltage reference by operating in reverse breakdown, maintaining a stable 7.5V output across a 1–20mA operating current range. Its 6Ω zener impedance ensures minimal voltage variation under load changes, while its –65°C to +150°C operating range supports industrial and automotive environments.
The device uses an alloy-42 leadframe with matte tin plating and is qualified to AEC-Q101 for high-reliability applications. Its SOD123 package features a cathode band polarity indicator and meets UL 94V-0 flammability rating with halogen- and antimony-free green molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.5V nominal, 7.13–7.88V range at 20mA - defines precise clamping threshold for 7.5V reference designs |
| Power Dissipation | 370mW at TA = +25°C - sets maximum continuous DC power handling on standard FR-4 PCB |
| Zener Impedance (ZZT) | 6Ω at IZT = 20mA - ensures <15mV output shift per 1mA load change in regulation circuits |
| Reverse Leakage (IR) | 3.0µA max at VR = 6.0V - guarantees negligible current draw in standby or high-impedance bias networks |
| Thermal Resistance (RθJA) | 338°C/W - indicates junction-to-ambient temperature rise of ~125°C at full 370mW dissipation |
| Operating Temperature | –65°C to +150°C - enables use in under-hood automotive modules and industrial control enclosures |
Pinout & Package
Package: SOD123 - surface-mount plastic case with cathode band marking; dimensions: 1.55mm × 2.65mm × 1.05mm (L × W × H); weight ≈ 0.01g; moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reverse breakdown reference ground node | Connected to circuit ground or lower-potential rail when used as shunt regulator |
| Cathode | Reverse-biased input / regulated output node | Connected to input voltage source and load; delivers stable 7.5V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| 500mW Power Rating at TL = +75°C | Enables higher transient power handling in thermally constrained layouts with local heatsinking |
| AEC-Q101 Qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Halogen- and Antimony-Free "Green" Compound | Meets strict environmental compliance (Br/Cl <900ppm, Sb <1000ppm) without compromising mold integrity |
| Solderable Matte Tin Plating | Ensures robust wetting and intermetallic formation during reflow, compatible with Pb-free and SnPb processes |
Applications
| Microcontroller Reset Circuit | DC-DC Feedback Reference |
|---|---|
Use Scenario: Provides clean, temperature-stable 7.5V threshold to trigger reset ICs during brown-out conditions. IC Role / Device Role / Timing Role: Zener acts as precision voltage comparator input reference for reset supervisor ICs like MAX809. Use Value: Tight 7.13–7.88V tolerance and low 6Ω impedance ensure consistent reset assertion across –40°C to +85°C ambient. |
Use Scenario: Sets output voltage of isolated flyback or buck converter via optocoupler feedback path. IC Role / Device Role / Timing Role: Shunt reference node that biases TL431 cathode or drives optocoupler LED directly. Use Value: Low 3.0µA leakage at 6V minimizes error current in high-gain feedback networks, improving regulation accuracy. |
| Industrial Sensor Signal Conditioning | Overvoltage Clamp for Analog Inputs |
Use Scenario: Stabilizes excitation voltage for 4–20mA loop-powered pressure transmitters. IC Role / Device Role / Timing Role: Precision 7.5V rail generator for bridge sensor excitation and ADC reference scaling. Use Value: –65°C to +150°C operation allows direct placement near heat-generating transducer electronics. |
Use Scenario: Protects 12-bit SAR ADC inputs from transient surges exceeding 10V in PLC analog modules. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that diverts excess energy before input ESD structures fail. Use Value: 6Ω impedance limits clamped voltage overshoot to ≤7.6V at 10mA surge, preserving ADC front-end integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C7V5 | 7.5V ±5%, 300mW PD, SOD323 package, 15Ω ZZT | Lower power rating and higher impedance reduce regulation stability under varying loads | Preferred only when board space is critical and thermal margin exceeds 100°C/W |
| MMBZ5236BS | 7.5V ±5%, 350mW PD, SOT-23 package, 8Ω ZZT, dual-anode configuration | Higher thermal resistance and different pinout require layout redesign and bias network adjustment | Chosen when dual-Zener redundancy or existing SOT-23 footprint reuse is mandatory |
Compared with BZX584C7V5 and MMBZ5236BS, MMSZ5236B-7 offers superior power handling (370mW vs. 300/350mW), lowest impedance (6Ω), and AEC-Q101 qualification-making it optimal for automotive and industrial systems demanding long-term voltage stability and thermal resilience.
Availability
MMSZ5236B-7 is available at Aetrix Electronics and suitable for voltage reference design, power supply feedback, and overvoltage protection requiring stable component supply across automotive, industrial control, and sensor interface applications.
Supply support for MMSZ5236B-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.
MMSZ5236B-7 belongs to the MMSZ52xxB series of general-purpose Zener diodes engineered for medium-current voltage regulation in cost-sensitive, high-volume applications such as consumer power adapters and automotive body electronics.
FAQ
What is the maximum continuous reverse current the MMSZ5236B-7 can handle without degradation?
The device is rated for up to 20mA zener test current (IZT) and supports continuous operation at 15mA with derated power (≤300mW) at +75°C ambient. Exceeding 20mA requires verification of junction temperature using RθJA = 338°C/W and thermal pad layout per Diodes' recommended footprint.
Does the MMSZ5236B-7 have a specified temperature coefficient for its zener voltage?
Yes - Figure 6 in DS18010 shows a typical temperature coefficient of approximately +0.04%/°C for the MMSZ5236B (7.5V type), meaning VZ increases by ~3mV per °C rise above 25°C. This value is confirmed for the 7.13–7.88V range and applies across the full operating temperature span.
Can the MMSZ5236B-7 be used in place of a 7.5V Zener with tighter tolerance?
No - its ±4.9% tolerance (7.13–7.88V) is fixed per the MMSZ52xxB series specification. For tighter tolerance (e.g., ±1%), consider Diodes' BZX84-C7V5 (±5%) or precision references like REF3075, which offer 0.2% initial accuracy but require external biasing.
Is the SOD123 package of the MMSZ5236B-7 compatible with standard reflow profiles?
Yes - the device is qualified for Pb-free reflow per J-STD-020, with peak temperature up to 260°C. Its matte tin finish and Level 1 moisture sensitivity allow direct placement without baking; recommended profile follows IPC/JEDEC J-STD-020D for small-outline diodes.
MMSZ5236B-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 FAQ
1.How can I place an order for MMSZ5236B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5236B-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 MMSZ5236B-7 reliable?
The price and inventory of MMSZ5236B-7 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 is usually 5 days.
3.What payment methods are accepted for MMSZ5236B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5236B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5236B-7?
MMSZ5236B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5236B-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 MMSZ5236B-7?
For technical support, including MMSZ5236B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5236B-7 requirements.
6.How does Aetrix verify that MMSZ5236B-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5236B-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 MMSZ5236B-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5236B-7?
All MMSZ5236B-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5236B-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 MMSZ5236B-7 part is unused and in its original packaging.
Return procedure for MMSZ5236B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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