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Vishay General Semiconductor - Diodes Division SML4764HE3_A/I
- Part No.:
- SML4764HE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SML4764HE3_A/I.pdf
- Description:
- DIODE ZENER 100V 1W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,011
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Product details
Overview
SML4764HE3_A/I from Vishay Semiconductors is a surface-mount Zener diode rated for 100 V nominal Zener voltage at 2.5 mA test current, with ±5 % tolerance (suffix A), 76 Ω dynamic impedance at IZT, and 3000 mApk surge current capability. It operates in single-diode configuration within the SMA (DO-214AC) package and is used for precision voltage regulation and overvoltage protection in DC power rails.
For engineers reviewing the SML4764HE3_A/I datasheet, SML4764HE3_A/I pinout, SML4764HE3_A/I application, or SML4764HE3_A/I equivalent, key selection criteria include its AEC-Q101 qualification, 1000 mW power dissipation at TL = 75 °C, MSL Level 1 moisture sensitivity, and UL 94 V-0 flammability rating - all critical for automotive and industrial power supply designs.
Technical Context
This device functions as a single-element, silicon planar Zener diode optimized for stable reverse-biased voltage reference operation. Its low regulation factor and low Zener impedance ensure minimal output voltage variation under load and temperature shifts.
The SML4764HE3_A/I is constructed in an SMA (DO-214AC) plastic package with cathode band marking, rated for 260 °C/10 s soldering, and qualified to AEC-Q101 for automotive-grade reliability. It exhibits a positive temperature coefficient above ~5 V, with typical ΘVZ ≈ +110 mV/°C at 100 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 100 V nominal at IZT = 2.5 mA; ±5 % tolerance ensures tight regulation for reference-sensitive circuits. |
| Power Dissipation (Ptot) | 1000 mW at lead temperature TL = 75 °C; supports robust thermal derating on standard PCB copper areas. |
| Dynamic Impedance (ZZ) | 76 Ω at IZT = 2.5 mA; low value maintains stable regulation under varying load currents. |
| Surge Current (IRM) | 45 mApk per JEDEC® 8.3 ms pulse; provides transient overvoltage clamping without failure. |
| Reverse Leakage (IR) | ≤5 μA at VR = 76 V; ensures minimal standby power loss in high-impedance bias networks. |
| Junction Temperature (Tj) | 150 °C maximum; enables reliable operation in under-hood or enclosed industrial environments. |
| Package | SMA (DO-214AC); industry-standard footprint compatible with automated SMT assembly and reflow profiles. |
Pinout & Package
SMA (DO-214AC) surface-mount package with molded plastic body, cathode band marking, and two terminals: anode and cathode. Dimensions: 4.93 mm × 3.99 mm × 2.29 mm (L × W × H), weight 64 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node in shunt regulator | Connected to circuit ground or lower-potential rail; defines polarity for reverse-bias operation. |
| Cathode | Zener voltage reference terminal / input node in shunt regulator | Connected to regulated voltage node; voltage at this terminal is clamped to 100 V ±5 % when reverse-biased above knee. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring extended temperature and life-cycle reliability. |
| UL 94 V-0 flammability rating | Ensures self-extinguishing behavior during fault-induced overheating, meeting safety standards for enclosed power systems. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life before reflow; eliminates bake requirements and simplifies manufacturing logistics. |
| 260 °C/10 s soldering guarantee | Withstands standard lead-free reflow profiles without parametric shift or package damage. |
| Low regulation factor | Minimizes output voltage drift across operating current range - critical for stable feedback references in switching regulators. |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Power Supply |
|---|---|
Use Scenario: Voltage clamping of 12 V/24 V battery-supplied microcontroller I/O lines against load-dump transients. IC Role / Device Role / Timing Role: Shunt overvoltage protector placed between MCU input pin and ground. Use Value: Limits voltage to ≤105 V (100 V + 5 % tolerance) during 100 V/50 ms transients, preventing latch-up or ESD damage. |
Use Scenario: Precision reference for isolated DC-DC converter feedback loop in programmable logic controller power modules. IC Role / Device Role / Timing Role: Stable 100 V Zener reference source for optocoupler-based error amplifier biasing. Use Value: Enables ±1 % output regulation via low-ZZ and tight VZ tolerance, reducing need for trimming resistors. |
| Telecom Base Station PSU | Medical Diagnostic Power Sequencing |
Use Scenario: Overvoltage protection of auxiliary 48 V DC distribution bus feeding RF front-end modules. IC Role / Device Role / Timing Role: Standby shunt clamp activated only during fault conditions exceeding 105 V. Use Value: Absorbs up to 3000 mApk surge energy without degradation, preserving downstream GaN FETs and PMICs. |
Use Scenario: Voltage supervision of high-voltage analog subsystems (e.g., X-ray detector bias supplies) during power-up sequencing. IC Role / Device Role / Timing Role: Reference element in comparator-based enable circuit verifying 100 V rail stability before enabling downstream loads. Use Value: Provides repeatable 100 V threshold with <5 μA leakage, minimizing false triggers and ensuring safe ramp-up timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C100,115 | 100 V ±5 %, 300 mW Ptot, SOT-23 package, no AEC-Q101 qualification | Lower power rating limits use to signal-level clamping; unsuitable for >100 mA continuous regulation. | Select when board space is constrained and automotive qualification is not required. |
| 1N4764A-TAP | 100 V ±5 %, 1000 mW Ptot, DO-41 through-hole package, no AEC-Q101 | Through-hole mounting requires manual or wave-solder process; incompatible with fully SMT production lines. | Select only for prototyping or legacy through-hole designs where rework flexibility outweighs automation needs. |
Compared with BZX84-C100,115 and 1N4764A-TAP, the SML4764HE3_A/I uniquely combines AEC-Q101 qualification, SMA surface-mount compatibility, and full 1000 mW power handling - making it the only drop-in solution for high-reliability, high-power, automotive-grade SMT voltage regulation.
Availability
SML4764HE3_A/I is available at Aetrix Electronics and suitable for automotive ECU designs, industrial PLC power supplies, telecom base station PSUs, and medical diagnostic equipment requiring stable component supply with long lifecycle assurance.
Supply support for SML4764HE3_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 SML47xx series was designed specifically for surface-mount Zener regulation in space-constrained, high-temperature, and mission-critical applications - emphasizing AEC-Q101 compliance, thermal robustness, and tight parametric control.
FAQ
What is the Zener voltage tolerance of SML4764HE3_A/I?
The SML4764HE3_A/I has a Zener voltage tolerance of ±5 %, indicated by the "A" suffix in its part number. At 25 °C and IZT = 2.5 mA, its nominal VZ is 100 V, meaning the actual measured voltage falls between 95 V and 105 V. This tighter tolerance supports precision regulation in feedback loops and voltage reference circuits where ±10 % variants would introduce unacceptable error.
Is SML4764HE3_A/I qualified for automotive applications?
Yes, the SML4764HE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's documentation for the SML47xxHE3_X family (where "_X" denotes AEC-Q101 revision code). This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating its suitability for under-hood and chassis-mounted automotive electronics.
What is the maximum power dissipation of SML4764HE3_A/I at ambient temperature?
The SML4764HE3_A/I is rated for 1000 mW total power dissipation at lead temperature TL = 75 °C, not ambient temperature. Derating follows the curve in Figure 1 of the datasheet: at TL = 150 °C, power drops to zero. For PCB-mounted operation on 8 mm × 8 mm copper pads, usable continuous power at 25 °C ambient exceeds 500 mW depending on layout and airflow.
Does SML4764HE3_A/I have a specified dynamic impedance?
Yes, the SML4764HE3_A/I has a specified dynamic impedance (ZZ) of 76 Ω at IZT = 2.5 mA and TA = 25 °C. This parameter reflects how tightly the Zener voltage is maintained under small-signal AC variations - critical for noise-sensitive references and feedback networks where low impedance minimizes output ripple coupling.
What does the "HE3_A/I" suffix mean in SML4764HE3_A/I?
In SML4764HE3_A/I, "HE3" indicates RoHS-compliant, AEC-Q101-qualified construction; "A" specifies ±5 % Zener voltage tolerance; and "/I" denotes tape-and-reel packaging per Vishay's ordering convention (1800 units per 7-inch reel). The full designation confirms automotive-grade, tight-tolerance, surface-mount Zener diode in SMA package with traceable, compliant sourcing.
SML4764HE3_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):
- 100 V
- Tolerance:
- ±10%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 350 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 76 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SML4764HE3_A/I FAQ
1.How can I place an order for SML4764HE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SML4764HE3_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 SML4764HE3_A/I reliable?
The price and inventory of SML4764HE3_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 SML4764HE3_A/I is usually 5 days.
3.What payment methods are accepted for SML4764HE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SML4764HE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SML4764HE3_A/I?
SML4764HE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SML4764HE3_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 SML4764HE3_A/I?
For technical support, including SML4764HE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SML4764HE3_A/I requirements.
6.How does Aetrix verify that SML4764HE3_A/I is sourced from the original manufacturer or authorized distributors?
All SML4764HE3_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 SML4764HE3_A/I meets industry standards.
7.What is the process for return or replacement of SML4764HE3_A/I?
All SML4764HE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SML4764HE3_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 SML4764HE3_A/I part is unused and in its original packaging.
Return procedure for SML4764HE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SML4764HE3_A/I Tags
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