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Vishay General Semiconductor - Diodes Division MMSZ5241B-HE3_A-18
- Part No.:
- MMSZ5241B-HE3_A-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5241B-HE3_A-18.pdf
- Description:
- DIODE ZENER 11V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:3,425
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Product details
Overview
MMSZ5241B-HE3_A-18 from Vishay Semiconductors is a silicon planar Zener diode with nominal zener voltage 11 V, ±5 % tolerance, and 20 mA test current, designed for precision voltage regulation and reference in low-power analog circuits, power supply feedback loops, and overvoltage protection stages.
For engineers reviewing the MMSZ5241B-HE3_A-18 datasheet, MMSZ5241B-HE3_A-18 pinout, MMSZ5241B-HE3_A-18 application, or MMSZ5241B-HE3_A-18 equivalent, this AEC-Q101 qualified SOD-123 packaged device offers verified thermal resistance (RthJA = 420 K/W), dynamic impedance of 22 Ω at IZT, and temperature coefficient of +0.067 %/°C - critical for automotive-grade voltage stabilization and industrial sensor biasing.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled VZ specification under thermal equilibrium conditions. Its single-diode configuration supports unidirectional voltage clamping and stable DC reference generation without external bias circuitry.
Designed for surface-mount assembly on FR-4 PCBs, it delivers 300 mW power dissipation with recommended footprint and meets JEDEC® 51-3 thermal modeling standards. ESD robustness exceeds 8 kV HBM and 800 V MM per AEC-Q101 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V nominal, ±5 % tolerance - ensures predictable regulation point across production lots and temperature range. |
| Test Current (IZT) | 20 mA - defines operating point where VZ and dynamic impedance are specified; matches common bias current in reference designs. |
| Dynamic Resistance (ZZ) | 22 Ω at IZT - determines output impedance and load regulation sensitivity in shunt regulator configurations. |
| Temperature Coefficient (αVZ) | +0.067 %/°C - indicates positive drift with temperature; enables compensation in multi-device references. |
| Power Dissipation (Ptot) | 300 mW on FR-4 board - sets maximum continuous power handling under standard layout conditions. |
| Thermal Resistance (RthJA) | 420 K/W - quantifies junction-to-ambient thermal path efficiency; informs derating curves above 25 °C ambient. |
| Reverse Leakage (IR) | 2 μA at VR = 8.4 V - defines minimum off-state current before breakdown; critical for low-power standby circuits. |
Pinout & Package
SOD-123 package: surface-mount, cathode-bar marked, 2.7 mm × 3.7 mm body, 0.55 mm lead pitch, MSL level 1, RoHS-compliant, UL 94 V-0 molding compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to system ground or lower-potential rail in shunt regulator topology. |
| Cathode | Zener breakdown terminal / Regulated output node | Provides stable 11 V reference when reverse-biased; connects to feedback node or protected line. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power rails. |
| ESD robustness | HBM > 8 kV and MM > 800 V - reduces risk of field failure during handling and system integration. |
| Low dynamic impedance | 22 Ω at 20 mA - improves regulation accuracy under varying load currents in feedback networks. |
| Stable temperature coefficient | +0.067 %/°C - enables predictable drift behavior for compensated reference designs. |
| RoHS-compliant packaging | HE3_A suffix denotes AEC-Q101 qualified, lead-free, halogen-free construction per JEDEC standards. |
Applications
| Automotive Engine Control Unit (ECU) Voltage Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 11 V reference for microcontroller ADC biasing and sensor excitation in under-hood ECU modules. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and regulate reference rail voltage. Use Value: AEC-Q101 qualification and +0.067 %/°C TC ensure consistent reference accuracy across -40 °C to +150 °C operating range. | Use Scenario: Biasing bridge-based pressure or temperature sensors in factory automation transmitters. IC Role / Device Role / Timing Role: Shunt regulator establishing precise excitation voltage for ratiometric sensor outputs. Use Value: 22 Ω dynamic impedance minimizes output variation under sensor load changes, improving measurement repeatability. |
| Consumer Power Adapter Feedback Network | Medical Portable Device Overvoltage Protection |
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 reference enabling accurate output voltage programming via optocoupler feedback loop. Use Value: ±5 % VZ tolerance and 20 mA IZT align with typical TL431 biasing requirements while maintaining cost-effective B-grade performance. | Use Scenario: Clamping transient surges on battery monitor IC inputs in portable ultrasound or glucose meters. IC Role / Device Role / Timing Role: Low-leakage (2 μA at 8.4 V) Zener acting as fail-safe overvoltage limiter on analog front-end rails. Use Value: 300 mW Ptot and 420 K/W RthJA allow reliable operation in compact, thermally constrained enclosures without active cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX584C11-7-F | ±2 % tolerance, 100 mW rating, SOD-323 package, lower power handling | Preferred for space-constrained consumer wearables requiring tighter VZ tolerance | Select when higher precision and smaller footprint outweigh power capability needs |
| 1N4740A | 10 V nominal, DO-41 through-hole package, 1 W rating, no AEC-Q101 qualification | Suitable for prototyping and non-automotive industrial power supplies | Choose for legacy designs or high-power bench testing where SMT is not required |
Compared with BZX584C11-7-F and 1N4740A, the MMSZ5241B-HE3_A-18 uniquely balances AEC-Q101 compliance, 300 mW FR-4 board rating, and 11 V ±5 % regulation - making it optimal for production automotive and industrial SMT systems requiring reliability and thermal predictability.
Availability
MMSZ5241B-HE3_A-18 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor transmitters, and medical portable devices requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MMSZ5241B-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 targets cost-sensitive, high-volume applications demanding AEC-Q101 qualified Zener regulation in miniature SOD-123 packages - optimized for modern SMT manufacturing and harsh-environment operation.
FAQ
What is the zener voltage tolerance of the MMSZ5241B-HE3_A-18?
The MMSZ5241B-HE3_A-18 has a nominal zener voltage of 11 V with a tolerance of ±5 %, as indicated by the "B" suffix in its part number. This tolerance is specified under standard test conditions (Tamb = 25 °C, IZT = 20 mA) and applies across the full operating temperature range of -55 °C to +150 °C. The HE3_A suffix confirms AEC-Q101 qualification but does not alter the voltage tolerance.
Is the MMSZ5241B-HE3_A-18 suitable for automotive applications?
Yes, the MMSZ5241B-HE3_A-18 is explicitly AEC-Q101 qualified, as denoted by the "HE3_A" suffix. It meets automotive reliability requirements including ESD robustness (>8 kV HBM), operating temperature range (-55 °C to +150 °C), and thermal cycling endurance. Its SOD-123 package and 300 mW FR-4 board rating support use in engine control units, body electronics, and ADAS power domains.
What is the maximum power dissipation of the MMSZ5241B-HE3_A-18 on a standard FR-4 PCB?
The MMSZ5241B-HE3_A-18 delivers 300 mW maximum power dissipation when mounted on an FR-4 printed circuit board using the recommended soldering footprint. This value assumes compliance with JEDEC® 51-3 thermal test conditions. On a test board with RthJL = 250 K/W, the rating increases to 500 mW - but the 300 mW figure governs real-world SMT designs.
Does the MMSZ5241B-HE3_A-18 have a specified dynamic impedance?
Yes, the MMSZ5241B-HE3_A-18 has a typical dynamic impedance (ZZ) of 22 Ω measured at the 20 mA test current (IZT). This parameter reflects the small-signal AC resistance in breakdown and directly impacts regulation stability under varying load conditions. Lower ZZ values like this improve voltage regulation accuracy in shunt reference applications.
What is the temperature coefficient of the MMSZ5241B-HE3_A-18?
The MMSZ5241B-HE3_A-18 exhibits a positive temperature coefficient of +0.067 %/°C, meaning its zener voltage increases slightly with rising junction temperature. This value is measured at the 20 mA test current and is consistent across the device's operating range. It enables predictable drift behavior for temperature-compensated reference designs.
MMSZ5241B-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):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 22 Ohms
- Current - Reverse Leakage @ Vr:
- 2 µA @ 8.4 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
MMSZ5241B-HE3_A-18 FAQ
1.How can I place an order for MMSZ5241B-HE3_A-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5241B-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 MMSZ5241B-HE3_A-18 reliable?
The price and inventory of MMSZ5241B-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 MMSZ5241B-HE3_A-18 is usually 5 days.
3.What payment methods are accepted for MMSZ5241B-HE3_A-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5241B-HE3_A-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5241B-HE3_A-18?
MMSZ5241B-HE3_A-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5241B-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 MMSZ5241B-HE3_A-18?
For technical support, including MMSZ5241B-HE3_A-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5241B-HE3_A-18 requirements.
6.How does Aetrix verify that MMSZ5241B-HE3_A-18 is sourced from the original manufacturer or authorized distributors?
All MMSZ5241B-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 MMSZ5241B-HE3_A-18 meets industry standards.
7.What is the process for return or replacement of MMSZ5241B-HE3_A-18?
All MMSZ5241B-HE3_A-18 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5241B-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 MMSZ5241B-HE3_A-18 part is unused and in its original packaging.
Return procedure for MMSZ5241B-HE3_A-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5241B-HE3_A-18 Tags
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