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Vishay General Semiconductor - Diodes Division SML4759AHE3_A/I
- Part No.:
- SML4759AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SML4759AHE3_A/I.pdf
- Description:
- DIODE ZENER 62V 1W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,660
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Product details
Overview
SML4759AHE3_A/I from Vishay Semiconductors is a surface-mount Zener diode with nominal zener voltage of 62 V, ±5 % tolerance (suffix A), 4 mA test current, and 125 Ω dynamic impedance at IZT; it delivers stable voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation for industrial power converters.
For engineers reviewing the SML4759AHE3_A/I datasheet, SML4759AHE3_A/I pinout, SML4759AHE3_A/I application, or SML4759AHE3_A/I equivalent, this device is selected for precision clamping in 60–65 V DC rails where low Zener impedance (<130 Ω), AEC-Q101 qualification, and SMA (DO-214AC) package thermal robustness are required.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled VZ = 62 V (nominal) at IZT = 4 mA, exhibiting low regulation factor and 47.1 V minimum knee voltage at IZK = 0.25 mA. Its 125 Ω dynamic impedance ensures minimal output voltage variation under load transients.
Rated for 1000 mW total power dissipation at TL = 75 °C, it supports surge current up to 2000 mApk (8.3 ms pulse) and maintains operation across -65 °C to +150 °C junction temperature range, with MSL level 1 moisture sensitivity and UL 94 V-0 flammability compliance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 62 V nominal, ±5 % tolerance - enables precise 62 V clamping in feedback networks without trimming resistors |
| Test Current (IZT) | 4 mA - defines operating point for specified VZ and dynamic impedance; matches typical bias currents in TL431-based regulators |
| Dynamic Impedance (ZZ) | 125 Ω at IZT = 4 mA - limits output voltage deviation to <0.5 V under ±1 mA load change |
| Power Dissipation (Ptot) | 1000 mW at TL = 75 °C - supports continuous regulation in PCB-mounted power stages with 8 × 8 mm copper pads |
| Surge Current (IRM) | 2000 mApk (8.3 ms) - withstands transient overvoltage events per JEDEC method without degradation |
| Junction Temperature (Tj) | 150 °C maximum - allows operation in high-ambient environments such as automotive engine control units |
Pinout & Package
Package: SMA (DO-214AC), surface-mount plastic case with cathode band marking; 64 mg weight, 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-voltage reference node | Connected to ground or lower-potential rail in shunt regulator configuration |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input rail or feedback point; carries full load current during regulation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC standard |
| Low Zener impedance | 125 Ω at 4 mA enables tight voltage regulation in closed-loop feedback paths with minimal error gain |
| High-temperature soldering guarantee | Rated for 260 °C/10 s reflow - compatible with standard lead-free SMT assembly processes |
| ±5 % voltage tolerance | Reduces need for post-assembly calibration in voltage reference and protection circuits |
| UL 94 V-0 flammability rating | Meets safety requirements for enclosed industrial and automotive power modules |
Applications
| Industrial Power Supply Feedback | Automotive Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler feedback. IC Role / Device Role / Timing Role: Shunt reference diode providing stable 62 V reference to TL431 or similar controller. Use Value: Maintains ±1 % output regulation across line/load variations due to low ZZ and tight VZ tolerance. |
Use Scenario: Protecting 48 V battery management system inputs against load-dump transients. IC Role / Device Role / Timing Role: Clamping transient spikes above 62 V to safeguard downstream analog front-end ICs. Use Value: Absorbs 2000 mApk surges without parametric shift, meeting ISO 7637-2 Pulse 5a requirements. |
| Programmable Reference Generator | DC Link Voltage Monitor |
Use Scenario: Generating adjustable reference voltages via resistor divider from unregulated 75 V DC bus. IC Role / Device Role / Timing Role: Precision Zener element setting upper threshold in comparator-based voltage window detectors. Use Value: Enables 62 V reference accuracy within ±3.1 V (±5 %), eliminating need for trimming potentiometers. |
Use Scenario: Monitoring 60 V DC link in motor drives to trigger shutdown before IGBT overvoltage failure. IC Role / Device Role / Timing Role: Voltage clamp limiting sensed signal to safe ADC input range. Use Value: Prevents ADC saturation during 60–65 V nominal operation while surviving 2000 mApk surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C62,115 (Nexperia) | Same 62 V ±5 %, but 300 mW Ptot, SOT-23 package, higher ZZ = 150 Ω | Limited to low-power signal-level clamping; unsuitable for >100 mA regulation loads | Select when board space is constrained and power dissipation ≤300 mW |
| 1N4748A (ON Semiconductor) | 62 V ±5 %, 1000 mW, DO-41 through-hole package, ZZ = 110 Ω, no AEC-Q101 qualification | Requires wave soldering; lacks automotive qualification and MSL level 1 handling | Select for cost-sensitive industrial prototypes where AEC-Q101 is not mandated |
Compared with BZX84-C62,115 and 1N4748A, the SML4759AHE3_A/I uniquely combines AEC-Q101 qualification, SMA surface-mount compatibility, and 1000 mW power handling - making it the only option among the three suitable for production automotive power modules requiring zero rework risk and high thermal reliability.
Availability
SML4759AHE3_A/I is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and DC link monitoring systems requiring stable component supply, long-term lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for SML4759AHE3_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, power efficiency, and automotive-grade validation.
The SML47xxA series is part of Vishay's surface-mount Zener diode product line, engineered for high-stability voltage regulation and transient suppression in harsh-environment power systems.
FAQ
What is the exact zener voltage tolerance for SML4759AHE3_A/I?
The SML4759AHE3_A/I has a zener voltage tolerance of ±5 %, confirmed by the "A" suffix in its part number and verified in the Electrical Characteristics table (VZ = 62 V nominal, min 59.0 V, max 65.0 V at IZT = 4 mA). This tighter tolerance eliminates need for external trimming in precision reference designs.
Is SML4759AHE3_A/I qualified for automotive applications?
Yes, SML4759AHE3_A/I is AEC-Q101 qualified, as indicated by the "HE3_A/I" ordering code suffix and explicitly stated in the Features section. It undergoes stress testing for temperature cycling, high-temperature reverse bias, and mechanical shock per AEC-Q101 Rev D requirements.
What is the maximum surge current rating for SML4759AHE3_A/I?
The SML4759AHE3_A/I supports a non-repetitive surge current of 2000 mApk (2 A peak) for 8.3 ms, per JEDEC method, as listed in the Electrical Characteristics table. This rating applies to single-event transients like load dump or inductive switching spikes.
Does SML4759AHE3_A/I have a defined cathode marking?
Yes, SML4759AHE3_A/I uses a cathode band marking on the SMA (DO-214AC) package, consistent with industry-standard polarity identification. The band aligns with the cathode terminal, which must be connected to the higher-potential node in shunt regulation configurations.
What is the thermal resistance from junction to lead (RθJL) for SML4759AHE3_A/I?
The datasheet does not specify RθJL directly, but provides thermal derating data: 1000 mW maximum power at TL = 75 °C. From Fig. 1, the device achieves full-rated power when lead temperature is held at or below 75 °C, implying effective thermal path to PCB copper pads rather than reliance on junction-to-air metrics.
SML4759AHE3_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):
- 62 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 125 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 47.1 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)
SML4759AHE3_A/I FAQ
1.How can I place an order for SML4759AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SML4759AHE3_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 SML4759AHE3_A/I reliable?
The price and inventory of SML4759AHE3_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 SML4759AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SML4759AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SML4759AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SML4759AHE3_A/I?
SML4759AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SML4759AHE3_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 SML4759AHE3_A/I?
For technical support, including SML4759AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SML4759AHE3_A/I requirements.
6.How does Aetrix verify that SML4759AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SML4759AHE3_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 SML4759AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SML4759AHE3_A/I?
All SML4759AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SML4759AHE3_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 SML4759AHE3_A/I part is unused and in its original packaging.
Return procedure for SML4759AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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