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Vishay General Semiconductor - Diodes Division MMSZ5248B-HE3_A-08
- Part No.:
- MMSZ5248B-HE3_A-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- SOD-123
- Datasheet:
-
MMSZ5248B-HE3_A-08.pdf
- Description:
- DIODE ZENER 18V 500MW SOD123
- Quantity:
- Payment:
- Shipping:
Inventory:13,900
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Product details
Overview
MMSZ5248B-HE3_A-08 from Vishay Semiconductors is a silicon planar Zener diode with a nominal zener voltage of 18 V, ±5 % tolerance, and AEC-Q101 qualification for automotive applications. It delivers 21 Ω dynamic resistance at 7 mA test current, supports 500 mW power dissipation on lead, and operates across -55 °C to +150 °C ambient temperature range - used for precision voltage regulation in automotive ECUs and sensor biasing circuits.
For engineers reviewing the MMSZ5248B-HE3_A-08 datasheet, MMSZ5248B-HE3_A-08 pinout, MMSZ5248B-HE3_A-08 application, or MMSZ5248B-HE3_A-08 equivalent, key selection criteria include its AEC-Q101 qualification status, SOD-123 package thermal performance (RthJA = 420 K/W), 18 V zener voltage stability under 7 mA test current, and ESD robustness (HBM > 8 kV).
Technical Context
This Zener diode operates in reverse breakdown mode with thermal equilibrium-based VZ specification, designed for stable reference voltage generation in low-power analog and digital subsystems. Its single-diode configuration and SOD-123 surface-mount package support high-density PCB layouts while maintaining reliable thermal dissipation via lead conduction.
The device exhibits a positive temperature coefficient of +0.082 %/°C, enabling predictable voltage drift compensation in temperature-varying environments. Its 0.1 μA reverse leakage at 14 V ensures minimal quiescent current draw in battery-sensitive applications such as automotive body control modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 18 V nominal, ±5 % tolerance - defines regulated output voltage under 7 mA test current with thermal equilibrium condition |
| Power Dissipation (Ptot) | 500 mW on lead (RthJL = 250 K/W) - enables operation without heatsinking in compact automotive PCB footprints |
| Dynamic Resistance (ZZ) | 21 Ω at IZT = 7 mA - determines load regulation sensitivity and ripple rejection capability |
| Reverse Leakage (IR) | 0.1 μA at VR = 14 V - ensures negligible standby current in always-on vehicle subsystems |
| Temperature Coefficient (αVZ) | +0.082 %/°C - quantifies voltage drift per degree Celsius for thermal design margining |
| Junction Temperature (Tj) | 150 °C maximum - sets upper limit for thermal management in under-hood environments |
| ESD Rating | HBM > 8 kV, MM > 800 V - meets AEC-Q101 stress requirements for assembly and field reliability |
Pinout & Package
SOD-123 surface-mount package: 2.7 mm × 1.55 mm footprint, 0.55 mm cathode bar width, 0.12 mm max thickness, UL 94 V-0 molding compound, MSL level 1, compatible with reflow profiles up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to system ground or lower-potential rail; establishes reference point for zener regulation |
| Cathode | Zener breakdown terminal / Regulated output node | Provides stable 18 V output when reverse-biased; marked by cathode bar on package top surface |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, humidity testing, and mechanical shock per AEC standard |
| ±5 % VZ tolerance (B suffix) | Enables cost-effective voltage reference design where tighter 2 % tolerance is not required |
| SOD-123 package thermal performance | RthJA = 420 K/W on FR-4 board allows 300 mW continuous dissipation without derating below 70 °C ambient |
| Low reverse leakage | 0.1 μA at 14 V supports ultra-low-power wake-up circuits and battery-backed memory retention |
| Positive temperature coefficient | +0.082 %/°C enables predictable voltage rise with temperature - useful for compensating NTC sensor circuits |
Applications
| Automotive Engine Control Unit (ECU) Reference | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Providing stable 18 V reference for analog-to-digital converter (ADC) biasing in engine knock sensor interface circuitry. IC Role / Device Role / Timing Role: Zener voltage reference diode establishing precise input range for signal conditioning op-amps and ADC front-end stages. Use Value: Maintains <±1 % reference accuracy over -40 °C to +125 °C operating range due to AEC-Q101 thermal validation and +0.082 %/°C TC matching. | Use Scenario: Regulating excitation voltage for 4–20 mA current-loop pressure transmitters in factory automation systems. IC Role / Device Role / Timing Role: Precision shunt regulator supplying constant 18 V to bridge sensor excitation circuitry. Use Value: Delivers 21 Ω dynamic resistance and 0.1 μA leakage to minimize output error and maintain loop compliance under varying load conditions. |
| Automotive Body Control Module (BCM) Power Monitoring | Medical Diagnostic Equipment Bias Supply |
Use Scenario: Monitoring 12 V battery rail integrity in BCMs using a resistive divider referenced to MMSZ5248B-HE3_A-08's stable 18 V output. IC Role / Device Role / Timing Role: Stable voltage reference enabling accurate undervoltage/overvoltage detection thresholds. Use Value: AEC-Q101 qualification and HBM > 8 kV ESD rating ensure long-term reliability in electrically noisy vehicle harness environments. | Use Scenario: Generating clean 18 V bias for photodiode amplifier stages in portable ultrasound probe front-ends. IC Role / Device Role / Timing Role: Low-noise shunt reference supporting sub-microvolt-level signal integrity in analog signal chains. Use Value: 500 mW lead-based power handling and 420 K/W RthJA enable stable operation without thermal runaway during extended diagnostic sessions. |
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 |
|---|---|---|---|
| BZX84-C18LT1G | 18 V ±5 %, SOT-23 package, RthJA ≈ 300 K/W, Ptot = 300 mW | Higher thermal resistance limits power handling on small PCB areas; lacks AEC-Q101 qualification | Select when cost-sensitive consumer designs require smaller footprint but do not demand automotive reliability |
| MMBZ5248BLT1G | 18 V ±5 %, SOT-23 package, AEC-Q101 qualified, Ptot = 300 mW | Lower power rating requires derating above 70 °C ambient; same voltage tolerance and qualification level | Choose for space-constrained automotive modules where 300 mW suffices and SOT-23 layout compatibility exists |
Compared with MMSZ5248B-HE3_A-08, BZX84-C18LT1G offers smaller size but no automotive qualification or lead-based 500 mW dissipation, while MMBZ5248BLT1G matches AEC-Q101 compliance but trades SOD-123 thermal performance for SOT-23 board area savings.
Availability
MMSZ5248B-HE3_A-08 is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, and medical diagnostic equipment requiring stable component supply with full traceability and lifecycle continuity.
Supply support for MMSZ5248B-HE3_A-08 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 supplier of discrete semiconductors specializing in diodes, MOSFETs, optoelectronics, and passive components, with emphasis on reliability and automotive-grade qualification.
The MMSZ52xx series targets precision voltage reference needs in space-constrained, thermally demanding applications - particularly automotive control units and industrial sensors where AEC-Q101 compliance and stable zener characteristics are mandatory.
FAQ
What is the zener voltage tolerance of MMSZ5248B-HE3_A-08?
MMSZ5248B-HE3_A-08 has a nominal zener voltage of 18 V with ±5 % tolerance, indicated by the "B" suffix in the part number. This tolerance is specified under thermal equilibrium conditions at 7 mA test current and applies across the full operating temperature range of -55 °C to +150 °C. The device meets this specification as verified in Vishay's AEC-Q101 qualified production testing.
Is MMSZ5248B-HE3_A-08 qualified for automotive applications?
Yes, MMSZ5248B-HE3_A-08 is explicitly AEC-Q101 qualified, as confirmed by the "HE3_A" suffix in the ordering code. It undergoes rigorous stress testing including temperature cycling, high-temperature operating life, and ESD verification (HBM > 8 kV, MM > 800 V), making it suitable for under-hood and body-control module applications in passenger vehicles and commercial vehicles.
What package type does MMSZ5248B-HE3_A-08 use?
MMSZ5248B-HE3_A-08 uses the SOD-123 surface-mount package: 2.7 mm × 1.55 mm body size, 0.55 mm cathode bar width, 0.12 mm max thickness, UL 94 V-0 rated molding compound, and MSL level 1 per J-STD-020. Its thermal resistance junction-to-ambient is 420 K/W on FR-4 board with recommended footprint.
What is the maximum power dissipation of MMSZ5248B-HE3_A-08?
MMSZ5248B-HE3_A-08 supports 500 mW power dissipation when heat is conducted through the leads (RthJL = 250 K/W), and 300 mW when dissipating on an FR-4 board with recommended soldering footprint (RthJA = 420 K/W). Derating begins above 70 °C ambient for board-mounted operation, per the admissible power vs. temperature curve in the Vishay datasheet.
Does MMSZ5248B-HE3_A-08 have ESD protection?
Yes, MMSZ5248B-HE3_A-08 features ESD capability validated per AEC-Q101: human body model (HBM) > 8 kV and machine model (MM) > 800 V. This level of ESD robustness is built into the silicon planar structure and packaging process, ensuring resilience during automated assembly and field operation in electrically noisy automotive environments.
MMSZ5248B-HE3_A-08 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:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 21 Ohms
- Current - Reverse Leakage @ Vr:
- 100 nA @ 14 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
MMSZ5248B-HE3_A-08 FAQ
1.How can I place an order for MMSZ5248B-HE3_A-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMSZ5248B-HE3_A-08 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 MMSZ5248B-HE3_A-08 reliable?
The price and inventory of MMSZ5248B-HE3_A-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMSZ5248B-HE3_A-08 is usually 5 days.
3.What payment methods are accepted for MMSZ5248B-HE3_A-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMSZ5248B-HE3_A-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMSZ5248B-HE3_A-08?
MMSZ5248B-HE3_A-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMSZ5248B-HE3_A-08 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 MMSZ5248B-HE3_A-08?
For technical support, including MMSZ5248B-HE3_A-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMSZ5248B-HE3_A-08 requirements.
6.How does Aetrix verify that MMSZ5248B-HE3_A-08 is sourced from the original manufacturer or authorized distributors?
All MMSZ5248B-HE3_A-08 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 MMSZ5248B-HE3_A-08 meets industry standards.
7.What is the process for return or replacement of MMSZ5248B-HE3_A-08?
All MMSZ5248B-HE3_A-08 units undergo pre-shipment inspection (PSI). If there is an issue with MMSZ5248B-HE3_A-08, 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 MMSZ5248B-HE3_A-08 part is unused and in its original packaging.
Return procedure for MMSZ5248B-HE3_A-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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