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Diodes Incorporated MMSZ5233B-7-F
- Part No.:
- MMSZ5233B-7-F
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5233B-7-F.pdf
- Description:
- DIODE ZENER 6V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:24,567
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Product details
Overview
MMSZ5233B-7-F from Diodes Incorporated is a 6.0 V ±5% tolerance, 500 mW surface-mount Zener diode in SOD123 package, rated for 20 mA test current with 7 Ω dynamic impedance at 1 kHz and 5 µA reverse leakage at 3.5 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog signal conditioning and power rail regulation circuits.
For engineers reviewing the MMSZ5233B-7-F datasheet, MMSZ5233B-7-F pinout, MMSZ5233B-7-F application, or MMSZ5233B-7-F equivalent, key selection criteria include zener voltage tolerance, thermal resistance (338 °C/W), JEDEC-compliant SOD123 footprint, AEC-Q101 qualification status, and lead-free/Green compliance for automotive and industrial PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown mode to maintain stable voltage across its terminals under varying load and temperature conditions. Its 6.0 V nominal zener voltage exhibits a positive temperature coefficient of +0.04 %/°C (typical), enabling predictable drift behavior in bias networks and reference dividers.
The device delivers 370 mW power dissipation at 25°C ambient and derates linearly to 500 mW at 75°C lead temperature. Its 1,600 Ω maximum knee impedance at 0.25 mA ensures reliable turn-on in low-current regulation scenarios without excessive voltage hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.0 V nominal, 5.70–6.30 V range at 20 mA - defines stable clamping/reference point for 5 V–6.3 V rail monitoring |
| Power Dissipation (PD) | 370 mW @ TA = 25°C - sets max continuous DC power in standard FR-4 layout with 1-inch copper pad |
| Zener Impedance (ZZT) | 7 Ω @ IZT = 20 mA, f = 1 kHz - ensures minimal output voltage variation under small-signal load transients |
| Reverse Leakage (IR) | 5.0 µA @ VR = 3.5 V - guarantees low standby current in high-impedance sensing or battery-backed circuits |
| Thermal Resistance (RθJA) | 338 °C/W - determines junction-to-ambient temperature rise per watt; critical for thermal margin in sealed enclosures |
| Package | SOD123 - JEDEC-standard 2-pin surface-mount outline with cathode band marking and 0.01 g mass |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including temperature cycling, HAST, and ESD testing |
Pinout & Package
Package: SOD123 - molded plastic case with matte tin-plated alloy 42 leadframe, cathode band polarity marking, UL 94V-0 flammability rating, and moisture sensitivity level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; forms reference ground return path in shunt regulator topology |
| Cathode | Reverse breakdown terminal / Zener voltage output node | Connected to input rail or signal source; provides stable 6.0 V reference when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW power rating at TL = 75°C | Enables use in thermally constrained automotive modules where lead temperature exceeds ambient by >50°C |
| Totally lead-free and RoHS 2 compliant | Meets EU Directive 2011/65/EU and supports automated reflow soldering without Pb-based process adjustments |
| Halogen- and antimony-free "Green" compound | Contains <900 ppm Br, <900 ppm Cl, <1000 ppm Sb - satisfies strict environmental requirements for Tier-1 automotive supply chains |
| Automated assembly optimized | Standard SOD123 footprint and tape-and-reel packaging (3,000 pcs/reel) compatible with pick-and-place equipment |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module (BCM) Voltage Reference |
|---|---|
|
Use Scenario: Stabilizing ADC reference voltage for 4–20 mA loop-powered temperature sensors operating from unregulated 12 V rails. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 6.0 V bias to op-amp gain stages and SAR ADC reference inputs. Use Value: Maintains ±1.5% reference accuracy over –40°C to +125°C due to low tempco and AEC-Q101 thermal cycling validation. |
Use Scenario: Clamping LIN bus transceiver supply pins against load-dump transients in door module ECUs. IC Role / Device Role / Timing Role: Overvoltage protection element limiting VCC to 6.3 V during ISO 7637-2 Pulse 5a events. Use Value: Absorbs 370 mW continuously and withstands 500 mW peak pulses without parametric shift or failure. |
| Consumer Power Adapter Feedback Network | Medical Portable Device Battery Monitor |
|
Use Scenario: Setting feedback threshold in secondary-side TL431-based flyback controllers for USB-C PD adapters. IC Role / Device Role / Timing Role: Precision voltage divider component establishing 2.5 V reference for optocoupler-driven error amplifier. Use Value: Enables <±2% output regulation tolerance via matched 6.0 V Zener + resistor ratio, reducing BOM count vs. discrete resistor network. |
Use Scenario: Providing stable reference for coulomb counter ICs measuring Li-ion cell voltage in wearable health monitors. IC Role / Device Role / Timing Role: Low-leakage (5 µA @ 3.5 V) voltage clamp protecting ADC input from overvoltage during hot-swap battery insertion. Use Value: Prevents ADC saturation while drawing negligible current from microamp-level battery monitor quiescent supply. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C6V2 | 6.2 V nominal, ±5% tolerance, 300 mW PD, SOD-323 package | Lower power rating and smaller footprint limit use to sub-10 mA bias networks | Select when board space is constrained and 6.2 V matches system reference requirement |
| 1N4735A | 6.2 V nominal, ±5% tolerance, 1 W PD, DO-41 through-hole package | Higher power handling but incompatible with SMT assembly and automotive vibration requirements | Choose only for prototyping or legacy through-hole designs where thermal margin exceeds 500 mW |
Compared with BZX584C6V2 and 1N4735A, MMSZ5233B-7-F uniquely balances AEC-Q101 qualification, SOD123 manufacturability, and 6.0 V precision in a 370 mW surface-mount form-making it optimal for production automotive and industrial PCBs requiring zero rework risk.
Availability
MMSZ5233B-7-F is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor interfaces, and consumer power adapter designs requiring stable component supply, full traceability, and long-term lifecycle support.
Supply support for MMSZ5233B-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 integrated circuits, headquartered in Plano, Texas, with design centers across Asia and manufacturing facilities in China, Taiwan, and the U.S.
The MMSZ52xxB series belongs to Diodes' general-purpose Zener diode product line, engineered specifically for cost-sensitive, high-volume applications demanding AEC-Q101 reliability, RoHS/Green compliance, and seamless SMT integration.
FAQ
What is the maximum steady-state power dissipation for MMSZ5233B-7-F on a standard FR-4 PCB?
The device dissipates up to 370 mW at 25°C ambient temperature when mounted on FR-4 with a 1-inch copper pad layout, per datasheet Note 5. Derating begins linearly above 25°C at 3.0 mW/°C, reaching 500 mW at 75°C lead temperature.
Is MMSZ5233B-7-F suitable for automotive applications?
Yes - it is qualified to AEC-Q101 standards, including stress tests for temperature cycling, humidity, and mechanical shock. The "Q" suffix denotes automotive grade, but MMSZ5233B-7-F itself carries commercial qualification with identical die and construction; full AEC-Q101 compliance is confirmed in DS18010 Rev. 28.
How does the 7 Ω zener impedance affect circuit performance?
A 7 Ω dynamic impedance at 20 mA means the output voltage changes by ~70 mV per 10 mA load step, ensuring tight regulation in low-current reference paths. This value is measured at 1 kHz and reflects small-signal AC behavior - critical for noise-sensitive analog front-ends.
What does the "-7-F" suffix indicate in the part number?
The "-7-F" denotes commercial-grade packaging: 3,000 units per tape-and-reel, with "F" indicating lead-free and halogen-free Green compound. The "7" refers to the reel size standard used by Diodes Incorporated for SOD123 devices.
MMSZ5233B-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):
- 6 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 7 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3.5 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
MMSZ5233B-7-F FAQ
1.How can I place an order for MMSZ5233B-7-F through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5233B-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 MMSZ5233B-7-F reliable?
The price and inventory of MMSZ5233B-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 MMSZ5233B-7-F is usually 5 days.
3.What payment methods are accepted for MMSZ5233B-7-F?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5233B-7-F transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5233B-7-F?
MMSZ5233B-7-F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5233B-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 MMSZ5233B-7-F?
For technical support, including MMSZ5233B-7-F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5233B-7-F requirements.
6.How does Aetrix verify that MMSZ5233B-7-F is sourced from the original manufacturer or authorized distributors?
All MMSZ5233B-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 MMSZ5233B-7-F meets industry standards.
7.What is the process for return or replacement of MMSZ5233B-7-F?
All MMSZ5233B-7-F units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5233B-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 MMSZ5233B-7-F part is unused and in its original packaging.
Return procedure for MMSZ5233B-7-F:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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