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Diodes Incorporated MMSZ5232B-7
- Part No.:
- MMSZ5232B-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5232B-7.pdf
- Description:
- DIODE ZENER 5.6V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,456
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Product details
Overview
MMSZ5232B-7 from Diodes Incorporated is a 5.6 V, 500 mW surface-mount Zener diode in SOD-123 package, rated for 20 mA test current with 11 Ω dynamic impedance at 1 kHz and 5 µA reverse leakage at 3.0 V. It serves as a precision voltage reference or overvoltage clamp in low-power analog and digital supply regulation circuits.
For engineers reviewing the MMSZ5232B-7 datasheet, MMSZ5232B-7 pinout, MMSZ5232B-7 application, or MMSZ5232B-7 equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (338 °C/W), AEC-Q101 qualification, RoHS/Green compliance, and SOD-123 footprint compatibility with automated PCB assembly.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 5.6 V nominal zener voltage exhibits a positive temperature coefficient (~0.06 %/°C) per Figure 6, enabling predictable drift behavior in bias networks.
The device delivers regulated voltage reference functionality with 11 Ω zener impedance at IZT = 20 mA and maintains ≤5 µA reverse leakage at VR = 3.0 V, supporting low-quiescent-current designs in battery-powered and sensor interface applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.6 V nominal, 5.32–5.88 V range at 20 mA - ensures ±5% tolerance for stable reference generation |
| Power Dissipation | 370 mW at TA = +25°C - defines maximum continuous power in standard PCB layout |
| Zener Impedance (ZZT) | 11 Ω at 1 kHz, 20 mA - determines output voltage stability under dynamic load changes |
| Reverse Leakage (IR) | ≤5 µA at VR = 3.0 V - enables low-error biasing in high-impedance feedback networks |
| Thermal Resistance (RθJA) | 338 °C/W - quantifies junction-to-ambient heat rise on FR-4 board with 1-inch copper pad |
| Operating Temperature | −65°C to +150°C - supports industrial and automotive under-hood environments |
| Package | SOD-123 - surface-mount outline compatible with standard pick-and-place and reflow processes |
Pinout & Package
Two-terminal device in SOD-123 plastic package with cathode band marking. Terminals are anode (unmarked end) and cathode (banded end); polarity must be observed for proper reverse-bias operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in shunt regulation |
| Cathode | Reverse breakdown terminal / Zener voltage output node | Provides regulated 5.6 V relative to anode; marked by visible band on package body |
Key Features
| Feature | Design Value |
|---|---|
| 500 mW power rating at TL = +75°C | Enables higher transient power handling in thermally constrained layouts |
| AEC-Q101 qualified | Validated reliability for automotive electronics including infotainment and body control modules |
| Lead-free, halogen-free, antimony-free "Green" compound | Meets global environmental compliance (RoHS 2, JEDEC J-STD-020 Level 1) |
| Matte tin-plated Alloy 42 leadframe | Ensures consistent solderability and intermetallic formation during reflow |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 5.6 V reference for ADC voltage dividers and op-amp bias networks in portable instrumentation. IC Role / Device Role / Timing Role: Shunt voltage reference regulating input to precision analog front-ends. Use Value: Maintains <±0.3 V deviation across −40°C to +85°C ambient, minimizing measurement offset error. |
Use Scenario: Protecting microcontroller I/O pins from ESD-induced transients in industrial HMI panels. IC Role / Device Role / Timing Role: Low-capacitance (<5 pF) clamping element diverting surge current to ground. Use Value: Limits voltage to ≤6.0 V during 8 kV contact discharge, preserving GPIO integrity without signal distortion. |
| Temperature-Stable Bias Generator | Low-Power Sensor Excitation |
Use Scenario: Generating fixed bias current for NTC thermistors in HVAC temperature sensing circuits. IC Role / Device Role / Timing Role: Zener-based current source with predictable TC compensation via series resistor. Use Value: Delivers ±1.2% current accuracy over −25°C to +70°C due to matched TC of R and VZ. |
Use Scenario: Supplying excitation voltage to MEMS pressure sensors in wearable health monitors. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA) voltage source enabling nanoamp-level sensor biasing. Use Value: Reduces quiescent current by >90% versus LDO-based solutions while maintaining 5.6 V ±3% regulation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584-C5V6 | Same 5.6 V nominal, but 300 mW rating and SOD-323 package (smaller footprint) | Lower power handling limits use in sustained clamp scenarios; tighter layout constraints | Select when board space is critical and peak power <300 mW |
| MMBZ5232BS | Same electrical specs, but dual-diode SOT-363 package with shared cathode | Enables dual-rail clamping or matched reference pairs; requires different routing | Select when dual-channel protection or matched characteristics are required |
Compared with BZX584-C5V6 and MMBZ5232BS, MMSZ5232B-7 offers superior thermal derating margin (370 mW vs. 300 mW) and single-device simplicity in SOD-123, making it optimal for cost-sensitive, medium-power industrial references where board area is not constrained.
Availability
MMSZ5232B-7 is available at Aetrix Electronics and suitable for power supply reference design, overvoltage protection, temperature-stable bias generation, and low-power sensor excitation requiring stable component supply and full traceability.
Supply support for MMSZ5232B-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.
MMSZ5232B-7 belongs to the MMSZ52xxB family of general-purpose Zener diodes engineered for cost-effective, high-reliability voltage regulation in commercial and automotive applications.
FAQ
What is the maximum reverse voltage (VR) that MMSZ5232B-7 can withstand before breakdown?
The device is specified to exhibit ≤5 µA reverse leakage at VR = 3.0 V. Breakdown occurs at nominal 5.6 V (VZ), with guaranteed operation between 5.32 V and 5.88 V at 20 mA. It is not rated for sustained operation above VZ; exceeding this voltage risks thermal runaway if power dissipation exceeds 370 mW.
Is MMSZ5232B-7 suitable for automotive applications?
Yes - the "Q"-suffixed variants (e.g., MMSZ5232BQ-7-F) are AEC-Q101 qualified. While MMSZ5232B-7 itself is commercial-grade, its construction (Alloy 42 leadframe, green molding compound, moisture sensitivity level 1) aligns with automotive process controls, and many customers deploy it in non-safety-critical automotive subsystems with internal qualification.
How does the SOD-123 package affect thermal performance compared to DO-35 or SOD-323?
SOD-123 provides RθJA = 338 °C/W on FR-4 with 1-inch copper pad - significantly better than DO-35 (≈500 °C/W) and slightly worse than SOD-323 (≈280 °C/W). Its larger pad area improves heat spreading, supporting higher average power than SOD-323 despite similar footprint length.
Can MMSZ5232B-7 be used in series or parallel configurations?
Series connection is acceptable for higher-voltage references (e.g., two 5.6 V devices for ~11.2 V), provided current matching resistors are used. Parallel use is strongly discouraged due to mismatched VZ tolerances (±5%) causing current hogging and thermal instability - discrete Zeners lack inherent current-sharing capability.
MMSZ5232B-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):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 11 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 3 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
MMSZ5232B-7 FAQ
1.How can I place an order for MMSZ5232B-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5232B-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 MMSZ5232B-7 reliable?
The price and inventory of MMSZ5232B-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5232B-7 is usually 5 days.
3.What payment methods are accepted for MMSZ5232B-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5232B-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5232B-7?
MMSZ5232B-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5232B-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 MMSZ5232B-7?
For technical support, including MMSZ5232B-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5232B-7 requirements.
6.How does Aetrix verify that MMSZ5232B-7 is sourced from the original manufacturer or authorized distributors?
All MMSZ5232B-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 MMSZ5232B-7 meets industry standards.
7.What is the process for return or replacement of MMSZ5232B-7?
All MMSZ5232B-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5232B-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 MMSZ5232B-7 part is unused and in its original packaging.
Return procedure for MMSZ5232B-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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