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Vishay General Semiconductor - Diodes Division MMSZ5240B-HE3_A-18
- Part No.:
- MMSZ5240B-HE3_A-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5240B-HE3_A-18.pdf
- Description:
- DIODE ZENER 10V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:8,971
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Product details
Overview
MMSZ5240B-HE3_A-18 from Vishay Semiconductors is a silicon planar Zener diode with a nominal zener voltage of 10 V ±5 %, rated for 500 mW power dissipation at lead temperature, and packaged in SOD-123 for space-constrained voltage regulation in automotive and industrial power rails.
For engineers reviewing the MMSZ5240B-HE3_A-18 datasheet, MMSZ5240B-HE3_A-18 pinout, MMSZ5240B-HE3_A-18 application, or MMSZ5240B-HE3_A-18 equivalent, this AEC-Q101 qualified device supports precision biasing, overvoltage clamping, and reference generation where thermal stability (αVZ = +0.064 %/°C) and ESD robustness (>8 kV HBM) are required.
Technical Context
This Zener diode operates in reverse breakdown mode with a specified test current IZT of 20 mA and dynamic resistance ZZ of 17 Ω at IZT, enabling stable regulation under moderate load variations. Its thermal resistance junction-to-ambient is 420 K/W on FR-4 board, limiting continuous power to 300 mW in typical PCB layouts.
The device features a single-diode configuration in a surface-mount SOD-123 package with cathode marking, optimized for automated assembly and compliant with JEDEC® 51-3 thermal measurement standards. It is rated for operation from –55 °C to +150 °C and storage up to +150 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 10 V nominal, ±5 % tolerance - ensures predictable clamping threshold in protection circuits |
| Power Dissipation (Ptot) | 500 mW at lead, 300 mW on FR-4 - defines maximum steady-state heat generation in PCB layout |
| Test Current (IZT) | 20 mA - standard operating point for VZ specification and dynamic resistance measurement |
| Dynamic Resistance (ZZ) | 17 Ω at IZT - determines regulation stiffness and output impedance in feedback or reference paths |
| Temperature Coefficient (αVZ) | +0.064 %/°C - quantifies VZ drift with ambient temperature, critical for high-accuracy references |
| ESD Rating | >8 kV HBM, >800 V MM - enables use in unshielded automotive modules without external ESD protection |
| Package | SOD-123 - 2.7 mm × 3.7 mm footprint with 0.55 mm cathode-to-anode spacing for compact routing |
Pinout & Package
SOD-123 surface-mount package with molded UL 94 V-0 compound, MSL level 1, and cathode marked by a bar on the top surface. Leads are designed for reflow soldering at peak temperatures ≤260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in clamp configuration | Connected to ground or lower potential node when used as shunt regulator |
| Cathode | Zener breakdown terminal / high-side connection in clamp configuration | Connected to input rail or signal line requiring voltage limiting or reference |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics |
| ±5 % Zener tolerance (B suffix) | Reduces binning requirements while maintaining sufficient accuracy for non-critical biasing |
| Low dynamic resistance (17 Ω) | Minimizes output voltage variation under changing load currents in feedback networks |
| High ESD immunity (>8 kV HBM) | Eliminates need for discrete TVS devices in low-energy interface protection stages |
| Thermal stability (αVZ = +0.064 %/°C) | Enables stable reference performance across extended industrial temperature ranges |
Applications
| Automotive Power Rail Clamp | Industrial Sensor Bias Reference |
|---|---|
Use Scenario: Clamping transient spikes on 12 V battery-supplied microcontroller I/O lines in vehicle infotainment systems. IC Role / Device Role / Timing Role: Shunt Zener regulator providing overvoltage protection at signal entry points. Use Value: Leverages AEC-Q101 qualification and >8 kV HBM rating to meet ISO 7637-2 pulse immunity without additional components. |
Use Scenario: Generating stable 10 V bias for analog front-end amplifiers in factory-floor pressure transducers. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC excitation and sensor bridge biasing. Use Value: Delivers <±0.5 V drift over –40 °C to +85 °C due to low αVZ and tight tolerance, reducing calibration frequency. |
| Consumer USB Port Protection | Medical Instrument Signal Conditioning |
Use Scenario: Protecting USB data lines against ESD events during hot-plug insertion in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-capacitance shunt clamp absorbing fast transients before they reach PHY ICs. Use Value: Achieves system-level IEC 61000-4-2 Level 4 compliance using only one discrete component per line. |
Use Scenario: Stabilizing supply voltage for op-amp-based isolation amplifiers in patient-connected ECG front-ends. IC Role / Device Role / Timing Role: Secondary voltage reference ensuring consistent gain and offset calibration across production batches. Use Value: Maintains <0.1 % full-scale error over lifetime due to RoHS-compliant molding compound and controlled leakage (<3 μA at VR). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C10-7-F | ±2 % tolerance, 250 mW Ptot, SOD-323 package (smaller footprint) | Better voltage accuracy but lower power handling; unsuitable for >150 mW continuous dissipation | Select when tighter regulation is prioritized over thermal margin and board space allows SOD-323 |
| MMBZ5240B-7-F | Same 10 V ±5 %, 350 mW Ptot, SOT-23 package (3-pin, anode/cathode/common) | Includes integrated common cathode configuration; higher RthJA limits sustained current capability | Choose for multi-Zener arrays or when shared cathode simplifies PCB routing in multi-rail systems |
Compared with BZX584C10-7-F and MMBZ5240B-7-F, the MMSZ5240B-HE3_A-18 offers superior thermal performance (500 mW lead-rated), AEC-Q101 qualification, and SOD-123 mechanical robustness-making it optimal for automotive and high-reliability industrial designs where long-term stability and surge resilience are critical.
Availability
MMSZ5240B-HE3_A-18 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor biasing, and medical signal conditioning requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MMSZ5240B-HE3_A-18 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
Vishay Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for automotive, industrial, and computing markets.
The MMSZ52xx series was developed to deliver AEC-Q101 qualified Zener diodes in miniature SOD-123 packages for voltage reference and transient suppression in space- and reliability-constrained embedded systems.
FAQ
What is the zener voltage tolerance of MMSZ5240B-HE3_A-18?
The MMSZ5240B-HE3_A-18 has a nominal zener voltage of 10 V with a tolerance of ±5 %, as indicated by the "B" suffix in its part number. This tolerance applies under standard test conditions (IZT = 20 mA, Tamb = 25 °C) and is verified per Vishay's production screening for AEC-Q101 qualified lots.
Is MMSZ5240B-HE3_A-18 suitable for automotive applications?
Yes, the MMSZ5240B-HE3_A-18 is AEC-Q101 qualified and explicitly rated for automotive use. Its qualification includes stress testing for temperature cycling, humidity bias, and mechanical shock-making it appropriate for engine control, body electronics, and ADAS subsystems where reliability is mandatory.
What is the maximum power dissipation of MMSZ5240B-HE3_A-18 on a standard FR-4 PCB?
The MMSZ5240B-HE3_A-18 is rated for 300 mW continuous power dissipation when mounted on an FR-4 board with the recommended soldering footprint. This value derives from its thermal resistance junction-to-ambient (RthJA = 420 K/W) and must be derated linearly above 25 °C ambient temperature per the datasheet's derating curve.
Does MMSZ5240B-HE3_A-18 have ESD protection built-in?
Yes, the MMSZ5240B-HE3_A-18 meets AEC-Q101 ESD requirements with Human Body Model (HBM) rating >8 kV and Machine Model (MM) rating >800 V. These values are measured per AEC-Q101 test methods and reflect intrinsic device robustness-not dependent on external circuitry.
What is the temperature coefficient of MMSZ5240B-HE3_A-18 and how does it affect performance?
The temperature coefficient (αVZ) of MMSZ5240B-HE3_A-18 is +0.064 %/°C, meaning its zener voltage increases by approximately 6.4 mV per °C rise in junction temperature. This positive drift helps compensate for other negative-drift components in mixed-signal systems, improving overall reference stability across temperature.
MMSZ5240B-HE3_A-18 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- SOD-123
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 17 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 8 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5240B-HE3_A-18 FAQ
1.How can I place an order for MMSZ5240B-HE3_A-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5240B-HE3_A-18 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 MMSZ5240B-HE3_A-18 reliable?
The price and inventory of MMSZ5240B-HE3_A-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5240B-HE3_A-18 is usually 5 days.
3.What payment methods are accepted for MMSZ5240B-HE3_A-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5240B-HE3_A-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5240B-HE3_A-18?
MMSZ5240B-HE3_A-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5240B-HE3_A-18 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 MMSZ5240B-HE3_A-18?
For technical support, including MMSZ5240B-HE3_A-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5240B-HE3_A-18 requirements.
6.How does Aetrix verify that MMSZ5240B-HE3_A-18 is sourced from the original manufacturer or authorized distributors?
All MMSZ5240B-HE3_A-18 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 MMSZ5240B-HE3_A-18 meets industry standards.
7.What is the process for return or replacement of MMSZ5240B-HE3_A-18?
All MMSZ5240B-HE3_A-18 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5240B-HE3_A-18, 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 MMSZ5240B-HE3_A-18 part is unused and in its original packaging.
Return procedure for MMSZ5240B-HE3_A-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5240B-HE3_A-18 Tags
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MM5Z5V1ST1G
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