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Vishay General Semiconductor - Diodes Division SML4761AHE3_A/I
- Part No.:
- SML4761AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SML4761AHE3_A/I.pdf
- Description:
- DIODE ZENER 75V 1W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,278
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Product details
Overview
SML4761AHE3_A/I from Vishay Semiconductors is a surface-mount Zener diode with nominal zener voltage of 75 V, ±5 % tolerance (suffix A), 3.3 mA test current, and 1000 mW power dissipation at TL = 75 °C. It features low dynamic impedance (56 Ω at IZT), AEC-Q101 qualification, and SMA (DO-214AC) package for automotive and industrial voltage regulation.
For engineers reviewing the SML4761AHE3_A/I datasheet, SML4761AHE3_A/I pinout, SML4761AHE3_A/I application, or SML4761AHE3_A/I equivalent, this part serves as a precision voltage reference in power supply feedback loops, overvoltage protection circuits, and voltage-clamping stages where stable 75 V regulation under pulse and DC conditions is required.
Technical Context
This device operates as a single-element, unidirectional Zener diode optimized for stable reverse-biased breakdown at 75 V. Its electrical behavior is defined by tight voltage tolerance (±5 %), low regulation factor, and low zener impedance (56 Ω at 3.3 mA), enabling accurate clamping in low-current reference paths.
The SML4761AHE3_A/I is rated for 2000 mApk surge current (8.3 ms pulse), supports MSL level 1 handling, and maintains junction temperature up to 150 °C - confirming suitability for automotive-grade thermal environments per AEC-Q101 qualification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 75 V nominal, ±5 % tolerance - ensures precise 75 V regulation in feedback and clamp circuits |
| Test Current (IZT) | 3.3 mA - defines operating point for specified VZ and dynamic impedance |
| Dynamic Impedance (ZZ) | 56 Ω at IZT - minimizes voltage deviation under load transients |
| Power Dissipation (Ptot) | 1000 mW at TL = 75 °C - supports robust thermal performance on standard PCB copper areas |
| Surge Current (IRM) | 2000 mApk (8.3 ms) - withstands transient overvoltage events without degradation |
| Junction Temperature (Tj) | 150 °C maximum - enables operation in under-hood and industrial ambient conditions |
| Reverse Leakage (IR) | 0.25 μA at VR = 57 V - ensures minimal quiescent current in high-impedance bias networks |
Pinout & Package
Package: SMA (DO-214AC), surface-mount plastic case with cathode band marking; weight 64 mg; UL 94 V-0 flammability rating; MSL level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side in reverse-bias operation | Connected to circuit ground or lower-potential node during Zener regulation |
| Cathode | Zener breakdown terminal / high-voltage side in reverse-bias operation | Connected to input or rail being regulated; marked by band on package body |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS power rails |
| ±5 % zener voltage tolerance | Reduces need for external trimming in precision voltage reference designs |
| Low dynamic impedance (56 Ω) | Improves regulation stability across varying load currents in feedback networks |
| MSL level 1 moisture sensitivity | Enables standard SMT assembly without baking or special handling |
| 260 °C/10 s soldering endurance | Compatible with lead-free reflow profiles used in modern manufacturing |
Applications
| Automotive Power Supply Regulation | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Regulating 75 V auxiliary rail in vehicle infotainment power module. IC Role / Device Role / Timing Role: Zener reference element in TL431-based shunt regulator feedback path. Use Value: Maintains ±5 % output accuracy over -40 °C to +125 °C ambient with no calibration. |
Use Scenario: Clamping analog sensor output before ADC input in factory automation PLC. IC Role / Device Role / Timing Role: Overvoltage protector limiting signal swing to 75 V absolute max. Use Value: Prevents ADC saturation and front-end damage during ESD or inductive kick events. |
| Telecom Line Card Protection | Medical Imaging Power Sequencing |
Use Scenario: Surge suppression on 48 V DC distribution bus in telecom base station shelf. IC Role / Device Role / Timing Role: Secondary clamping device absorbing residual transients after primary TVS. Use Value: Handles 2000 mApk 8.3 ms surges while maintaining <0.25 μA leakage at 57 V. |
Use Scenario: Voltage threshold detector enabling high-voltage X-ray generator sequencing. IC Role / Device Role / Timing Role: Precision 75 V reference triggering enable logic via comparator input. Use Value: Enables repeatable turn-on timing with <±0.5 V drift across 15-year service life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C75,115 (Nexperia) | 75 V ±5 %, 300 mW Ptot, SOT-23 package, higher ZZ (100 Ω) | Limited to low-power portable electronics; not AEC-Q101 qualified | Select when board space is constrained and automotive qualification is unnecessary |
| 1N4744A (ON Semiconductor) | 15 V nominal, ±5 %, 1000 mW, DO-41 through-hole package | Not suitable for 75 V regulation; differs in voltage, package, and mounting | Use only if redesigning for lower-voltage reference and through-hole assembly |
Compared with BZX84-C75,115 and 1N4744A, the SML4761AHE3_A/I uniquely delivers 75 V regulation in an AEC-Q101-qualified SMA package with 56 Ω dynamic impedance - making it the only option among the three for automotive-grade, surface-mount, high-voltage precision clamping.
Availability
SML4761AHE3_A/I is available at Aetrix Electronics and suitable for automotive power management, industrial sensor interfaces, and telecom surge protection requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SML4761AHE3_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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements with emphasis on reliability and automotive-grade validation.
The SML47xxA series was designed specifically for surface-mount Zener regulation in harsh-environment applications, combining AEC-Q101 qualification, tight voltage tolerance, and robust surge capability in the SMA package.
FAQ
What is the zener voltage tolerance for SML4761AHE3_A/I?
The SML4761AHE3_A/I has a nominal zener voltage of 75 V with ±5 % tolerance, as indicated by the "A" suffix in the part number. This tolerance is verified at 3.3 mA test current and 25 °C ambient, and applies across the full operating temperature range per the Vishay datasheet Rev. 2.2.
Is SML4761AHE3_A/I qualified for automotive use?
Yes, the SML4761AHE3_A/I is AEC-Q101 qualified, confirmed by its "HE3_A/I" ordering code suffix and explicit listing in Vishay's AEC-Q101-compliant Zener diode family. It meets stress testing requirements for temperature cycling, humidity, and mechanical shock applicable to automotive power modules and control units.
What is the maximum surge current rating for SML4761AHE3_A/I?
The SML4761AHE3_A/I supports a non-repetitive surge current of 2000 mApk for 8.3 ms, per JEDEC-standard square-wave pulse testing. This rating is valid at Tamb = 25 °C and enables reliable transient suppression in power supply input stages and interface protection circuits.
Does SML4761AHE3_A/I have a specified dynamic impedance?
Yes, the SML4761AHE3_A/I has a dynamic impedance (ZZ) of 56 Ω measured at the 3.3 mA zener test current (IZT). This value reflects small-signal AC impedance in the breakdown region and directly impacts regulation accuracy under varying load conditions.
What package type does SML4761AHE3_A/I use?
The SML4761AHE3_A/I uses the SMA (DO-214AC) surface-mount package, with cathode identification via a molded band. Its dimensions are 4.93 mm × 3.99 mm × 2.29 mm, and it complies with MSL level 1 per J-STD-020 for moisture sensitivity.
SML4761AHE3_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):
- 75 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 175 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 56 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)
SML4761AHE3_A/I FAQ
1.How can I place an order for SML4761AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SML4761AHE3_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 SML4761AHE3_A/I reliable?
The price and inventory of SML4761AHE3_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 SML4761AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SML4761AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SML4761AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SML4761AHE3_A/I?
SML4761AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SML4761AHE3_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 SML4761AHE3_A/I?
For technical support, including SML4761AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SML4761AHE3_A/I requirements.
6.How does Aetrix verify that SML4761AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SML4761AHE3_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 SML4761AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SML4761AHE3_A/I?
All SML4761AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SML4761AHE3_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 SML4761AHE3_A/I part is unused and in its original packaging.
Return procedure for SML4761AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SML4761AHE3_A/I Tags
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