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Vishay General Semiconductor - Diodes Division MMSZ5248C-E3-18
- Part No.:
- MMSZ5248C-E3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5248C-E3-18.pdf
- Description:
- DIODE ZENER 18V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:6,216
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Product details
Overview
MMSZ5248C-E3-18 from Vishay Semiconductors is a silicon planar Zener diode with a nominal zener voltage of 18 V, ±2 % tolerance, and 7 mA test current (IZT), designed for precision voltage regulation in low-power analog circuits and power supply feedback paths.
For engineers reviewing the MMSZ5248C-E3-18 datasheet, MMSZ5248C-E3-18 pinout, MMSZ5248C-E3-18 application, or MMSZ5248C-E3-18 equivalent, this device delivers stable 18 V reference performance with low dynamic resistance (21 Ω at IZT), tight tolerance, and AEC-Q101 qualification options - critical for automotive sensor biasing, industrial voltage clamping, and portable battery protection circuits.
Technical Context
This Zener diode operates in reverse breakdown mode with thermal equilibrium-based VZ specification, supporting precise DC voltage reference generation across -55 °C to +150 °C operating range. Its SOD-123 package enables surface-mount integration on FR-4 PCBs with recommended footprint and JEDEC-compliant reflow profiles.
The device exhibits a positive temperature coefficient of +0.082 %/°C and maintains ≤0.1 μA reverse leakage at VR = 14 V, ensuring minimal quiescent current draw in high-impedance bias networks. Dynamic resistance remains stable under 7 mA test current, enabling predictable regulation in low-current shunt regulator topologies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V nominal, ±2 % tolerance - ensures accurate 18 V reference within ±0.36 V at 25 °C for precision feedback loops. |
| Test Current (IZT) | 7 mA - defines the operating point where VZ and dynamic resistance are specified; matches typical low-power regulator current levels. |
| Dynamic Resistance (ZZ) | 21 Ω at IZT - limits output voltage variation under load changes; supports stable regulation in shunt configurations. |
| Power Dissipation | 300 mW on FR-4 board - sets maximum continuous power handling with standard PCB layout; derates linearly above 25 °C ambient. |
| Reverse Leakage (IR) | ≤0.1 μA at VR = 14 V - minimizes error current in high-impedance reference dividers and battery-monitoring circuits. |
| Temperature Coefficient (αVZ) | +0.082 %/°C - quantifies VZ drift with temperature; enables compensation design in wide-temperature-range applications. |
| Junction Temperature (Tj) | 150 °C max - defines absolute thermal limit for reliable long-term operation in enclosed or high-ambient environments. |
Pinout & Package
SOD-123 surface-mount package: 2.7 mm × 3.7 mm body, 1.55 mm lead pitch, cathode marked by bar on top surface. Mold compound rated UL 94 V-0; MSL level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in shunt regulator; forms reference ground return path for feedback networks. |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 18 V output relative to anode; must be connected to regulated rail or error amplifier input in feedback loop. |
Key Features
| Feature | Design Value |
|---|---|
| ±2 % Zener voltage tolerance | Enables tighter regulation accuracy than ±5 % variants, reducing need for post-calibration in factory-trimmed systems. |
| Low dynamic resistance (21 Ω) | Minimizes output voltage deviation under varying load currents, improving stability in analog sensor excitation circuits. |
| AEC-Q101 qualified option available | Supports automotive-grade deployment in engine control modules and ADAS power management without additional qualification effort. |
| ESD robustness (HBM > 8 kV) | Reduces risk of field failure during handling and assembly in automated SMT lines and end-user repair scenarios. |
| RoHS-compliant, halogen-free molding compound | Meets global environmental compliance requirements for industrial, medical, and consumer electronics manufacturing. |
Applications
| Automotive Sensor Biasing | Industrial Power Supply Feedback |
|---|---|
|
Use Scenario: Providing stable 18 V bias to analog pressure or temperature sensors in engine control units. IC Role / Device Role / Timing Role: Precision voltage reference source for sensor excitation and ADC reference scaling. Use Value: Tight ±2 % tolerance and +0.082 %/°C TC ensure sensor output linearity remains within 0.5 % over -40 °C to +125 °C. |
Use Scenario: Shunt regulation in isolated flyback converter feedback path to maintain ±1 % output voltage accuracy. IC Role / Device Role / Timing Role: Zener reference element in optocoupler-coupled feedback network. Use Value: 21 Ω dynamic resistance and 7 mA IZT enable fast transient response and minimal regulation error under load step changes. |
| Portable Battery Protection | Medical Instrument Reference |
|
Use Scenario: Overvoltage clamp for Li-ion battery packs during charging, limiting cell voltage to safe 18 V threshold. IC Role / Device Role / Timing Role: Voltage-limiting shunt element in protection IC interface circuitry. Use Value: ≤0.1 μA reverse leakage preserves battery shelf life; 300 mW power rating handles brief surge events without thermal runaway. |
Use Scenario: Stable 18 V reference for analog front-end amplifiers and precision DACs in portable ECG monitors. IC Role / Device Role / Timing Role: Low-noise DC reference generator for signal conditioning stages. Use Value: Thermal equilibrium VZ spec and MSL level 1 packaging ensure long-term calibration stability and reflow compatibility in Class II medical assemblies. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C18LT1G | Same 18 V ±5 % tolerance, SOT-23 package, 350 mW Ptot, higher ZZ (40 Ω) | Larger footprint and looser tolerance reduce suitability for high-accuracy feedback loops | Select when cost sensitivity outweighs precision needs and SOT-23 layout already exists |
| MMSZ5248B-E3-18 | Identical 18 V nominal rating but ±5 % tolerance, same SOD-123 package and thermal specs | Lower accuracy requires additional trimming or calibration in closed-loop systems | Choose for non-critical biasing where ±5 % VZ meets system margin requirements |
Compared with MMSZ5248C-E3-18, BZX84-C18LT1G trades precision for package flexibility and higher power, while MMSZ5248B-E3-18 offers identical form factor with relaxed tolerance - making the C-suffix version optimal for designs demanding ±2 % regulation without layout change.
Availability
MMSZ5248C-E3-18 is available at Aetrix Electronics and suitable for automotive sensor biasing, industrial power supply feedback, and portable battery protection requiring stable component supply and traceable RoHS-compliant sourcing.
Supply support for MMSZ5248C-E3-18 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 industrial, automotive, and computing markets.
The MMSZ52xx series targets precision voltage reference and clamping applications in space-constrained, thermally demanding environments - emphasizing tight tolerance, low leakage, and AEC-Q101 readiness.
FAQ
What is the exact zener voltage and tolerance for MMSZ5248C-E3-18?
MMSZ5248C-E3-18 has a nominal zener voltage of 18 V with a guaranteed tolerance of ±2 % at 25 °C and 7 mA test current (IZT), as confirmed in Vishay's official datasheet revision 1.1. This tight tolerance enables use in applications where reference accuracy directly impacts system-level measurement or regulation performance.
Does MMSZ5248C-E3-18 meet automotive qualification standards?
MMSZ5248C-E3-18 itself is the commercial-grade variant (E3 suffix); however, the identical 18 V device with HE3_A suffix (MMSZ5248C-HE3_A-18) is AEC-Q101 qualified. Engineers requiring automotive deployment should specify the HE3_A version, which shares all electrical and mechanical characteristics except qualification status.
What is the maximum power dissipation for MMSZ5248C-E3-18 on a standard FR-4 PCB?
MMSZ5248C-E3-18 is rated for 300 mW maximum power dissipation when mounted on an FR-4 board using Vishay's recommended soldering footprint. This value assumes natural convection cooling and derates linearly above 25 °C ambient temperature per the published thermal resistance curve (RthJA = 420 K/W).
How does the dynamic resistance of MMSZ5248C-E3-18 affect regulation stability?
MMSZ5248C-E3-18 exhibits 21 Ω dynamic resistance at 7 mA test current, meaning a 1 mA change in zener current causes approximately 21 mV change in output voltage. This low ZZ value ensures minimal regulation error in shunt regulator configurations where load current varies dynamically.
What package type and marking code does MMSZ5248C-E3-18 use?
MMSZ5248C-E3-18 uses the SOD-123 surface-mount package with cathode indicated by a bar on the top surface. Its marking code is "J8", as specified in Vishay's datasheet table for the MMSZ52xx family - confirming identity and voltage grade during visual inspection and automated optical recognition.
MMSZ5248C-E3-18 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):
- 18 V
- Tolerance:
- ±2%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 21 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123
MMSZ5248C-E3-18 FAQ
1.How can I place an order for MMSZ5248C-E3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5248C-E3-18 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 MMSZ5248C-E3-18 reliable?
The price and inventory of MMSZ5248C-E3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5248C-E3-18 is usually 5 days.
3.What payment methods are accepted for MMSZ5248C-E3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5248C-E3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5248C-E3-18?
MMSZ5248C-E3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5248C-E3-18 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 MMSZ5248C-E3-18?
For technical support, including MMSZ5248C-E3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5248C-E3-18 requirements.
6.How does Aetrix verify that MMSZ5248C-E3-18 is sourced from the original manufacturer or authorized distributors?
All MMSZ5248C-E3-18 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 MMSZ5248C-E3-18 meets industry standards.
7.What is the process for return or replacement of MMSZ5248C-E3-18?
All MMSZ5248C-E3-18 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5248C-E3-18, 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 MMSZ5248C-E3-18 part is unused and in its original packaging.
Return procedure for MMSZ5248C-E3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMSZ5248C-E3-18 Tags
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