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Vishay General Semiconductor - Diodes Division SML4760AHE3_A/I
- Part No.:
- SML4760AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SML4760AHE3_A/I.pdf
- Description:
- DIODE ZENER 68V 1W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,052
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Product details
Overview
SML4760AHE3_A/I from Vishay Semiconductors is a surface-mount Zener diode with nominal zener voltage of 68 V, ±5 % tolerance (suffix "A"), 3.7 mA test current, and 150 Ω dynamic impedance at IZT; designed for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation in industrial DC-DC converters.
For engineers reviewing the SML4760AHE3_A/I datasheet, SML4760AHE3_A/I pinout, SML4760AHE3_A/I application, or SML4760AHE3_A/I equivalent, this part delivers AEC-Q101 qualification, UL 94 V-0 flammability rating, MSL Level 1 moisture sensitivity, and 260 °C/10 s soldering robustness - critical for automotive-grade board-level reliability and high-volume automated assembly.
Technical Context
This device operates as a single-element, unidirectional Zener diode in reverse-bias breakdown mode, with specified regulation at 3.7 mA (IZT1) and knee current of 0.25 mA (IZT2). Its 68 V nominal zener voltage exhibits a positive temperature coefficient (~+30 mV/°C per Fig. 3), requiring thermal design consideration in stable reference applications.
The SMA (DO-214AC) package enables surface-mount integration with 1000 mW power dissipation at TL = 75 °C, junction temperature limit of 150 °C, and surge current capability of 2000 mApk (8.3 ms pulse). Reverse leakage remains ≤5 μA at 51.7 V (0.75 × VZ), supporting low-power standby regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 68 V nominal, ±5 % tolerance - ensures tight output voltage setting in feedback networks without trimming. |
| Test Current (IZT1) | 3.7 mA - defines operating point for specified VZ and dynamic impedance; matches typical TL431-based shunt regulator bias currents. |
| Dynamic Impedance (ZZ) | 150 Ω at IZT1 - determines load regulation error under varying current; lower than SML4760 (150 Ω vs. 150 Ω same value but higher tolerance variant). |
| Power Dissipation (Ptot) | 1000 mW at TL = 75 °C - supports continuous operation in compact PCB layouts with moderate copper area (8 × 8 mm). |
| Surge Current (IRM) | 2000 mApk (8.3 ms) - withstands transient overvoltage events such as load dump or inductive kickback in 12 V/24 V systems. |
| Reverse Leakage (IR) | ≤5 μA at 51.7 V - minimizes quiescent current in battery-backed or energy-harvesting circuits where low standby loss is essential. |
Pinout & Package
Package: SMA (DO-214AC), surface-mount plastic case with cathode band marking; dimensions 4.93 × 3.99 × 2.29 mm (L × W × H); weight 64 mg; UL 94 V-0 rated molding compound; MSL Level 1 per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in Zener configuration | Connected to system ground or lower-potential node when used in reverse-bias regulation. |
| Cathode | Zener breakdown terminal / high-side connection | Connected to regulated rail or feedback node; marked by band on package body. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive underhood applications including engine control units and body electronics requiring extended temperature and reliability compliance. |
| ±5 % zener voltage tolerance | Reduces need for external trimming in mid-precision voltage references, enabling tighter output regulation in isolated flyback or forward converter feedback paths. |
| Low dynamic impedance (150 Ω) | Improves line and load regulation stability in shunt regulator topologies, especially when paired with optocoupler-based feedback. |
| 260 °C/10 s soldering guarantee | Ensures compatibility with lead-free reflow profiles without parametric shift or delamination risk during high-throughput SMT manufacturing. |
| MSL Level 1 handling | Eliminates bake requirements before assembly, reducing production overhead and moisture-related defects in humid environments. |
Applications
| Industrial Power Supply Feedback | Automotive Load Dump Protection |
|---|---|
|
Use Scenario: Regulating output voltage in isolated 24 V DC-DC converters using TL431 + optocoupler feedback loop. IC Role / Device Role / Timing Role: Zener reference element providing stable 68 V clamp for secondary-side error amplifier bias and overvoltage threshold detection. Use Value: Enables precise 24 V ±1 % output regulation across line/load/temperature with minimal external components and no calibration. |
Use Scenario: Clamping induced transients on 12 V vehicle battery lines during alternator load dump events (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Standby overvoltage protector placed across input rail to divert surge current away from downstream DC-DC regulators and microcontrollers. Use Value: Absorbs 2000 mApk surges up to 68 V clamping level, preventing damage to 36 V-rated input stages without crowbar circuitry. |
| Programmable Reference Generator | Energy-Efficient Sensor Biasing |
|
Use Scenario: Generating stable 68 V bias for high-voltage op-amp stages in industrial analog front-ends (e.g., piezoelectric sensor signal conditioning). IC Role / Device Role / Timing Role: Precision shunt reference supplying regulated current to high-impedance divider networks feeding instrumentation amplifiers. Use Value: Delivers <5 μA leakage at 51.7 V and 150 Ω impedance, minimizing drift and noise contribution in µV-level measurement chains. |
Use Scenario: Providing low-quiescent-current bias for MEMS pressure sensors in battery-powered IoT nodes operating at 3.3 V supply. IC Role / Device Role / Timing Role: Low-leakage Zener used in series with resistor to generate fixed 68 V intermediate rail for sensor excitation, then stepped down via ultra-low-IQ buck converter. Use Value: Maintains ≤5 μA reverse current at 51.7 V, preserving battery life over multi-year deployments while enabling high-SNR sensor operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C68LT1G | 68 V ±5 %, SOT-23 package, 300 mW Ptot, 100 Ω ZZ, 200 mApk surge | Lower power rating and surge capacity; suitable only for signal-level clamping or low-current references. | Select when board space is constrained and thermal load is <300 mW; not recommended for primary power rail protection. |
| 1N4744A | 15 V ±5 %, DO-41 through-hole, 1000 mW Ptot, 14 Ω ZZ, 1000 mApk surge | Different voltage grade and through-hole mounting; incompatible pinout and thermal profile for SMT designs. | Choose only for legacy through-hole redesigns requiring 15 V regulation; not a functional substitute for 68 V SML4760AHE3_A/I. |
Compared with BZX84-C68LT1G and 1N4744A, SML4760AHE3_A/I uniquely combines 68 V precision, 1000 mW power handling, AEC-Q101 qualification, and SMA packaging - making it the only option among the three qualified for automotive-grade surface-mount overvoltage protection at this voltage level.
Availability
SML4760AHE3_A/I is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECU protection circuits, and programmable reference generators requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SML4760AHE3_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 with emphasis on automotive, industrial, and computing applications.
The SML47xxA family targets surface-mount Zener regulation in space-constrained, high-reliability environments - engineered specifically for AEC-Q101 compliance, robust thermal performance, and consistent parametric stability across temperature and life cycle.
FAQ
What is the zener voltage tolerance of SML4760AHE3_A/I?
The SML4760AHE3_A/I has a zener voltage tolerance of ±5 %, indicated by the "A" suffix in its part number. This means its nominal 68 V zener voltage falls within 64.6 V to 71.4 V at 3.7 mA test current and 25 °C ambient. This tighter tolerance improves accuracy in voltage reference and overvoltage detection circuits compared to standard ±10 % variants like SML4760HE3_A/I.
Is SML4760AHE3_A/I qualified for automotive applications?
Yes, SML4760AHE3_A/I is AEC-Q101 qualified, as confirmed by Vishay's documentation for the SML47xxA series. This qualification covers stress testing for temperature cycling, humidity bias, mechanical shock, and high-temperature operating life - validating its use in automotive powertrain, chassis, and body electronics where reliability under harsh conditions is mandatory.
What is the maximum surge current rating for SML4760AHE3_A/I?
The SML4760AHE3_A/I supports a non-repetitive surge current of 2000 mApk for an 8.3 ms pulse width, per JEDEC method. This rating applies at 25 °C ambient and enables the device to absorb transient overvoltages such as load dump pulses in 24 V vehicle systems without degradation, provided average power dissipation remains within 1000 mW limits.
Does SML4760AHE3_A/I require moisture preconditioning before reflow?
No, SML4760AHE3_A/I has a moisture sensitivity level (MSL) of Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30 °C/60 % RH without baking. This eliminates pre-reflow bake steps in manufacturing, reducing process complexity and avoiding thermal stress that could affect parametric consistency or package integrity.
What is the dynamic impedance of SML4760AHE3_A/I and why does it matter?
The dynamic impedance (ZZ) of SML4760AHE3_A/I is 150 Ω at 3.7 mA test current. This value quantifies how much the zener voltage changes with small variations in current - lower ZZ yields better regulation. At 150 Ω, the device maintains stable voltage under typical feedback bias currents, minimizing output ripple and improving transient response in regulated power supplies.
SML4760AHE3_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):
- 68 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 150 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 51.7 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)
SML4760AHE3_A/I FAQ
1.How can I place an order for SML4760AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SML4760AHE3_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 SML4760AHE3_A/I reliable?
The price and inventory of SML4760AHE3_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 SML4760AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SML4760AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SML4760AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SML4760AHE3_A/I?
SML4760AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SML4760AHE3_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 SML4760AHE3_A/I?
For technical support, including SML4760AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SML4760AHE3_A/I requirements.
6.How does Aetrix verify that SML4760AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SML4760AHE3_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 SML4760AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SML4760AHE3_A/I?
All SML4760AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SML4760AHE3_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 SML4760AHE3_A/I part is unused and in its original packaging.
Return procedure for SML4760AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SML4760AHE3_A/I Tags
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MM5Z5V1ST1G
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