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Vishay General Semiconductor - Diodes Division SML4750AHE3_A/I
- Part No.:
- SML4750AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SML4750AHE3_A/I.pdf
- Description:
- DIODE ZENER 27V 1W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,131
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Product details
Overview
SML4750AHE3_A/I from Vishay Semiconductors is a surface-mount Zener diode with nominal Zener voltage 27 V, ±5 % tolerance (suffix A), 9.5 mA test current, and 35 Ω dynamic impedance at IZT, designed for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation.
For engineers reviewing the SML4750AHE3_A/I datasheet, SML4750AHE3_A/I pinout, SML4750AHE3_A/I application, or SML4750AHE3_A/I equivalent, this device requires attention to its SMA (DO-214AC) package thermal limits, surge current rating of 750 mApk, and AEC-Q101 qualification status for automotive-grade reliability validation.
Technical Context
This Zener diode operates as a single-element, two-terminal voltage reference with reverse-biased breakdown behavior. Its low dynamic impedance (35 Ω) and tight ±5 % voltage tolerance enable stable regulation under varying load and temperature conditions.
The device is rated for 1000 mW total power dissipation at 75 °C lead temperature, junction temperature up to 150 °C, and meets MSL level 1 moisture sensitivity per J-STD-020 - confirming suitability for standard reflow soldering without dry-pack requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V nominal, ±5 % tolerance - ensures precise clamping at 25.65–28.35 V under 9.5 mA test current |
| Power Dissipation (Ptot) | 1000 mW at TL = 75 °C - supports continuous operation in compact PCB layouts with adequate copper heatsinking |
| Dynamic Impedance (ZZ) | 35 Ω at IZT = 9.5 mA - minimizes output voltage variation during load transients in feedback networks |
| Surge Current (IRM) | 750 mApk (8.3 ms pulse) - withstands short-duration overvoltage events without degradation |
| Reverse Leakage (IR) | ≤5 μA at VR = 20.6 V - guarantees low standby current in high-impedance bias/reference paths |
| Junction Temperature (Tj) | 150 °C maximum - enables use in under-hood automotive environments and industrial enclosures |
Pinout & Package
SMA (DO-214AC) surface-mount package: 2-terminal, cathode-banded, plastic-molded case with UL 94 V-0 flammability rating and 64 mg typical weight. Compatible with standard 12 mm tape-and-reel handling (7" or 13" reels).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node | Connected to circuit common or lower-potential rail; establishes reference polarity for Zener operation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input voltage source; maintains stable 27 V relative to anode during reverse conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics requiring extended temperature and reliability compliance |
| ±5 % Zener voltage tolerance | Reduces need for post-assembly trimming in voltage reference designs, improving manufacturing yield and BOM consistency |
| Low dynamic impedance (35 Ω) | Enables tighter regulation in switching power supply feedback paths where loop stability depends on reference stiffness |
| MSL Level 1 rating | Permits direct placement onto PCBs without baking or special handling prior to standard reflow profiles |
| UL 94 V-0 flammability | Meets safety standards for consumer and industrial end equipment requiring flame-retardant component materials |
Applications
| Automotive Power Management | Industrial SMPS Feedback |
|---|---|
Use Scenario: Voltage clamping in 12 V/24 V vehicle subsystems such as lighting modules and sensor interfaces. IC Role / Device Role / Timing Role: Zener diode providing overvoltage protection and stable reference for linear regulators or microcontroller reset circuits. Use Value: AEC-Q101 qualification and 150 °C junction rating ensure reliable operation across automotive temperature ranges without derating. |
Use Scenario: Secondary-side voltage reference in isolated flyback converters for factory automation controllers. IC Role / Device Role / Timing Role: Precision Zener element in optocoupler feedback loop to regulate output voltage within ±1 %. Use Value: 35 Ω dynamic impedance minimizes feedback error under dynamic load steps, improving transient response. |
| Consumer Device Protection | Test & Measurement Reference |
Use Scenario: Input surge suppression in USB-powered IoT hubs and docking stations. IC Role / Device Role / Timing Role: Clamping diode shunting transient energy above 27 V to protect downstream LDOs and USB PHYs. Use Value: 750 mApk surge rating handles IEC 61000-4-5 Level 3 surges without parametric shift or failure. |
Use Scenario: Stable voltage reference in portable multimeters and calibration sources. IC Role / Device Role / Timing Role: Low-drift, low-noise Zener element establishing 27 V reference for ADC full-scale calibration. Use Value: ±5 % initial tolerance and low leakage (<5 μA) reduce calibration drift and improve measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C27LT1G | 27 V ±5 %, SOT-23 package, 300 mW Ptot, 70 Ω ZZ | Lower power rating and higher impedance limit use in high-current or precision regulation roles | Select when board space is constrained and thermal load is ≤300 mW; not suitable for AEC-Q101 automotive systems |
| 1N4750A | 27 V ±5 %, DO-41 through-hole package, 1000 mW Ptot, 35 Ω ZZ, no AEC-Q101 | Lacks automotive qualification and surface-mount compatibility; requires wave soldering or hand assembly | Choose only for legacy through-hole designs or prototyping where reflow compatibility is unnecessary |
Compared with BZX84-C27LT1G and 1N4750A, the SML4750AHE3_A/I uniquely combines AEC-Q101 qualification, SMA surface-mount compatibility, and 1000 mW power handling - making it the only option among the three validated for production automotive electronics with automated assembly.
Availability
SML4750AHE3_A/I is available at Aetrix Electronics and suitable for automotive power management, industrial SMPS feedback, and consumer device protection requiring stable component supply, consistent Zener voltage tolerance, and AEC-Q101-compliant sourcing.
Supply support for SML4750AHE3_A/I 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 SML47xxA series is part of Vishay's surface-mount Zener portfolio engineered for precision voltage regulation and robust surge immunity in space-constrained, high-reliability applications.
FAQ
What is the Zener voltage tolerance of the SML4750AHE3_A/I?
The SML4750AHE3_A/I has a Zener voltage tolerance of ±5 %, meaning its nominal 27 V breakdown occurs between 25.65 V and 28.35 V at the specified 9.5 mA test current. This tighter tolerance versus standard ±10 % parts reduces calibration overhead and improves system-level accuracy in reference and protection circuits.
Is the SML4750AHE3_A/I qualified for automotive applications?
Yes, the SML4750AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's documentation for the SML47xxA family. This qualification validates its performance under automotive temperature cycling, humidity, mechanical shock, and lifetime reliability requirements - making it suitable for engine control, body electronics, and ADAS subsystems.
What package type does the SML4750AHE3_A/I use?
The SML4750AHE3_A/I uses the SMA (DO-214AC) surface-mount package - a 2-terminal, cathode-banded, plastic-molded case with standardized 12 mm tape-and-reel packaging. Its dimensions (5.28 mm × 4.50 mm × 2.29 mm) and MSL Level 1 rating support automated pick-and-place and standard reflow soldering.
What is the maximum surge current rating for the SML4750AHE3_A/I?
The SML4750AHE3_A/I has a non-repetitive surge current rating of 750 mApk per JEDEC method (8.3 ms pulse width). This value reflects its ability to absorb transient overvoltage energy without parametric shift or failure - critical for protecting downstream ICs in power supply input stages.
How does the dynamic impedance of the SML4750AHE3_A/I affect regulation performance?
The SML4750AHE3_A/I exhibits 35 Ω dynamic impedance at 9.5 mA test current. This low value means minimal change in Zener voltage under load variations - directly improving regulation stability in feedback networks and reducing output ripple in precision reference applications.
SML4750AHE3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 20.6 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SML4750AHE3_A/I FAQ
1.How can I place an order for SML4750AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SML4750AHE3_A/I 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 SML4750AHE3_A/I reliable?
The price and inventory of SML4750AHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SML4750AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SML4750AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SML4750AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SML4750AHE3_A/I?
SML4750AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SML4750AHE3_A/I 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 SML4750AHE3_A/I?
For technical support, including SML4750AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SML4750AHE3_A/I requirements.
6.How does Aetrix verify that SML4750AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SML4750AHE3_A/I 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 SML4750AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SML4750AHE3_A/I?
All SML4750AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SML4750AHE3_A/I, 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 SML4750AHE3_A/I part is unused and in its original packaging.
Return procedure for SML4750AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SML4750AHE3_A/I Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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