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Diodes Incorporated MMSZ5233B-7
- Part No.:
- MMSZ5233B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5233B-7.pdf
- Description:
- DIODE ZENER 6V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,078
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Product details
Overview
MMSZ5233B-7 from Diodes Incorporated is a 6.0 V, 500 mW surface-mount Zener diode in SOD123 package, rated for 20 mA test current with 7 Ω dynamic impedance at 1 kHz and 5.0 µA reverse leakage at 3.5 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and power-supply feedback circuits.
For engineers reviewing the MMSZ5233B-7 datasheet, MMSZ5233B-7 pinout, MMSZ5233B-7 application, or MMSZ5233B-7 equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (338 °C/W), AEC-Q101 qualification, RoHS/Green compliance, and SOD123 footprint compatibility with automated assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage regulation across varying load currents, with nominal zener voltage of 6.0 V (min 5.70 V, max 6.30 V) at 20 mA test current. Its 7 Ω zener impedance at IZT ensures tight regulation under small-signal conditions.
Designed for commercial-grade applications, it features a cathode band polarity marker, matte tin-plated alloy 42 leadframe, and moisture sensitivity level 1 per J-STD-020. Power derating begins at +25°C ambient, reaching 500 mW only at +75°C lead temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.0 V nominal, ±5% tolerance - enables accurate 6 V reference in feedback networks |
| Test Current (IZT) | 20 mA - defines operating point for specified VZ and ZZT |
| Zener Impedance (ZZT) | 7 Ω at 1 kHz - low dynamic resistance improves regulation stability |
| Power Dissipation (PD) | 370 mW at TA = +25°C - sets maximum continuous DC power in standard PCB layout |
| Reverse Leakage (IR) | 5.0 µA at VR = 3.5 V - ensures minimal quiescent current in standby mode |
| Thermal Resistance (RθJA) | 338 °C/W - determines junction-to-ambient temperature rise under load |
| Package | SOD123 - 2-pin surface-mount outline compatible with high-speed pick-and-place |
Pinout & Package
Two-terminal device in SOD123 plastic package with cathode band marking. Terminals are anode and cathode; polarity is unambiguous via molded cathode band on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in reverse-bias regulation configuration |
| Cathode | Zener breakdown terminal / voltage reference output | Marked by band; connected to regulated voltage node in shunt regulator topology |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW power rating at TL = +75°C | Enables higher transient power handling than standard 370 mW rating at ambient |
| AEC-Q101 qualified | Validated for automotive electronics use with extended reliability testing |
| Lead-free, halogen-free, antimony-free "Green" compound | Meets strict environmental compliance without compromising thermal performance |
| SOD123 footprint | Standardized 2.65 mm × 1.55 mm outline supports automated optical inspection and reflow |
Applications
| Power Supply Feedback | Overvoltage Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or buck converter feedback loop using optocoupler-coupled TL431 alternative. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 6.0 V threshold for error amplifier biasing. Use Value: Tight ±5% VZ tolerance and 7 Ω ZZT minimize output drift across line/load/temperature. | Use Scenario: Clamping transient surges on 5 V logic rail during hot-swap or ESD events. IC Role / Device Role / Timing Role: Passive crowbar element diverting excess energy to ground when voltage exceeds 6.3 V. Use Value: Low 5.0 µA leakage at 3.5 V preserves system standby current; SOD123 allows compact placement near IC pins. |
| Reference Voltage Source | Signal Level Translation |
Use Scenario: Generating stable 6 V reference for ADC input scaling or sensor excitation in industrial DAQ modules. IC Role / Device Role / Timing Role: Precision voltage source replacing larger TO-92 Zeners in space-constrained designs. Use Value: 338 °C/W RθJA enables predictable thermal behavior on FR-4 boards with 1-inch copper pad. | Use Scenario: Biasing level-shifter transistors between 3.3 V MCU and 5 V peripheral interface. IC Role / Device Role / Timing Role: Fixed-voltage clamp defining upper rail for transistor base drive. Use Value: Cathode-band polarity and SOD123 orientation simplify layout verification and reduce assembly errors. |
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%, 300 mW PD, SOD-323 package | Lower power rating and smaller footprint; less thermal margin in sustained operation | Select when board space is critical and peak power < 300 mW |
| MMBZ5233BS | 6.0 V nominal, ±5%, 300 mW PD, SOT-23 package | Same VZ but reduced power capability and different pinout (cathode on pin 3) | Choose only if existing SOT-23 footprint must be retained and thermal load is light |
Compared with BZX584C6V2 and MMBZ5233BS, MMSZ5233B-7 offers superior thermal performance (370 mW vs. 300 mW at TA), AEC-Q101 qualification, and SOD123 mechanical robustness-making it preferred for automotive and industrial power regulation where reliability and power margin matter.
Availability
MMSZ5233B-7 is available at Aetrix Electronics and suitable for power supply feedback, overvoltage protection, and reference voltage source applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.
Supply support for MMSZ5233B-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, manufacturing, and sales operations across Asia, Europe, and North America.
MMSZ5233B-7 belongs to the MMSZ52xxB series of general-purpose Zener diodes engineered for medium-current voltage regulation in cost-sensitive, high-volume consumer and automotive electronics.
FAQ
What is the maximum reverse voltage (VR) before significant leakage occurs?
At 3.5 V reverse bias, leakage current is guaranteed ≤5.0 µA per datasheet. Beyond that, leakage rises nonlinearly; the device is not rated for continuous operation above its 6.0 V zener voltage. For clamping, ensure peak transient voltage stays within the 6.30 V maximum VZ limit to avoid degradation.
Is MMSZ5233B-7 suitable for automotive applications?
Yes-MMSZ5233B-7 is explicitly qualified to AEC-Q101 standards, including stress tests for temperature cycling, humidity, and mechanical shock. Its SOD123 package and green molding compound meet automotive reliability and environmental requirements for under-hood and infotainment systems.
How does thermal derating affect usable power at 85°C ambient?
Using the derating curve, power drops linearly from 370 mW at 25°C to zero at ~135°C. At 85°C ambient, allowable power is approximately 220 mW. This assumes standard FR-4 PCB with 1-inch copper pad; actual dissipation depends on board layout and airflow.
Can MMSZ5233B-7 replace older MMSZ5233B variants with different suffixes?
Yes-the "-7" suffix denotes 3,000-piece tape-and-reel packaging in SOD123. Electrically and mechanically identical to -13-F (10,000/reel) and Q-7-F (automotive grade); only packaging and qualification differ. No circuit redesign is needed when substituting within same temperature grade.
MMSZ5233B-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):
- 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 FAQ
1.How can I place an order for MMSZ5233B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5233B-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 MMSZ5233B-7 reliable?
The price and inventory of MMSZ5233B-7 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 is usually 5 days.
3.What payment methods are accepted for MMSZ5233B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5233B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5233B-7?
MMSZ5233B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5233B-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 MMSZ5233B-7?
For technical support, including MMSZ5233B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5233B-7 requirements.
6.How does Aetrix verify that MMSZ5233B-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5233B-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 MMSZ5233B-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5233B-7?
All MMSZ5233B-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5233B-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 MMSZ5233B-7 part is unused and in its original packaging.
Return procedure for MMSZ5233B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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