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Vishay General Semiconductor - Diodes Division SML4754AHE3_A/I
- Part No.:
- SML4754AHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SML4754AHE3_A/I.pdf
- Description:
- DIODE ZENER 39V 1W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,352
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Product details
Overview
SML4754AHE3_A/I from Vishay Semiconductors is a surface-mount Zener diode with nominal zener voltage of 39 V, ±5 % tolerance (suffix "A"), 6.5 mA test current, and 60 Ω dynamic impedance at IZT; it delivers stable voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation for industrial sensor interfaces.
For engineers reviewing the SML4754AHE3_A/I datasheet, SML4754AHE3_A/I pinout, SML4754AHE3_A/I application, or SML4754AHE3_A/I equivalent, this AEC-Q101-qualified, RoHS-compliant SMA (DO-214AC) device supports high-reliability automotive and industrial designs requiring low regulation factor, 1000 mW power dissipation at TL = 75 °C, and 115 mApk surge current capability.
Technical Context
This Zener diode operates in reverse breakdown mode with tightly controlled VZ = 39 V (nominal), specified at IZT1 = 6.5 mA and IZT2 = 5 mA, delivering 60 Ω dynamic impedance (ZZ) and 29.7 V minimum knee voltage (VZK). Its low regulation factor ensures minimal voltage drift under varying load currents.
The device features a single-diode configuration in SMA (DO-214AC) package, rated for 150 °C junction temperature and MSL level 1 moisture sensitivity, with peak soldering temperature up to 260 °C/10 s - validated for automated reflow assembly without degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V nominal, ±5 % tolerance - enables precise 39 V reference or clamping in feedback networks |
| Test Current (IZT1) | 6.5 mA - defines operating point where VZ and ZZ are guaranteed per spec |
| Dynamic Impedance (ZZ) | 60 Ω at IZT1 - determines regulation stiffness; lower value improves line/load regulation |
| Power Dissipation (Ptot) | 1000 mW at TL = 75 °C - supports sustained operation in compact PCB layouts with thermal relief |
| Surge Current (IRM) | 115 mApk (8.3 ms pulse) - withstands transient overvoltage events without failure |
| Reverse Leakage (IR) | 0.25 μA at VR = 29.7 V - ensures negligible standby current in high-impedance bias networks |
| Package | SMA (DO-214AC) - industry-standard surface-mount outline with cathode band marking and 2.54 mm lead pitch |
Pinout & Package
SMA (DO-214AC) package: molded plastic body with cathode band marking; two terminals - anode and cathode - arranged in axial orientation with 2.54 mm center-to-center lead spacing. Designed for standard pick-and-place and reflow soldering on 0.31" × 0.31" copper pads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / reference ground node in shunt regulator | Connected to system ground or low-side return path; carries reverse leakage and regulated current |
| Cathode | Zener breakdown terminal / regulated output node | Connected to voltage source or feedback node; maintains stable 39 V relative to anode during conduction |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS power rails |
| UL 94 V-0 flammability rating | Ensures flame resistance in enclosed industrial enclosures and safety-critical assemblies |
| Low Zener impedance (60 Ω) | Minimizes output voltage variation under ±10 % load current changes in feedback loops |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow without baking or dry-pack handling |
| High-temperature soldering guarantee | Withstands 260 °C for 10 s - compatible with lead-free reflow profiles without parametric shift |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Analog Input Module |
|---|---|
Use Scenario: Voltage reference for ADC biasing and sensor excitation in harsh-temperature ECU environments. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable 39 V rail for precision op-amp biasing and isolated signal conditioning. Use Value: AEC-Q101 qualification and 150 °C Tj rating ensure long-term stability across -40 °C to +125 °C ambient operation. |
Use Scenario: Overvoltage clamp protecting 24 V input circuitry from transients induced by inductive load switching. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across input filter capacitor to limit surge energy before LDO stage. Use Value: 115 mApk surge rating and 60 Ω ZZ enable reliable clamping without thermal runaway during repetitive 8.3 ms pulses. |
| Medical Patient Monitor Power Supply | Telecom Base Station Bias Network |
Use Scenario: Secondary-side feedback reference in isolated flyback converter powering analog front-end circuitry. IC Role / Device Role / Timing Role: Precision shunt regulator defining output voltage via optocoupler feedback loop. Use Value: ±5 % VZ tolerance and low regulation factor maintain <±1 % output accuracy across line/load/temperature. |
Use Scenario: Bias voltage stabilization for RF power amplifier driver stages requiring clean 39 V supply. IC Role / Device Role / Timing Role: Low-noise voltage reference replacing higher-cost IC references where moderate accuracy suffices. Use Value: 0.25 μA reverse leakage at 29.7 V minimizes quiescent current draw in always-on bias networks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C39,115 (Nexperia) | Same 39 V nominal, ±5 %, but SOT-23 package (lower Ptot = 300 mW); ZZ = 90 Ω | Not suitable for >300 mW continuous dissipation; limited to low-power biasing | Select when board space is constrained and power demand is ≤200 mW |
| 1N4754A (ON Semiconductor) | Same 39 V/±5 %/6.5 mA spec, but DO-41 through-hole package; Ptot = 1000 mW, ZZ = 60 Ω | Requires through-hole assembly; incompatible with fully SMT production lines | Select only for legacy through-hole designs or prototyping with breadboard compatibility |
Compared with BZX84-C39,115 and 1N4754A, the SML4754AHE3_A/I uniquely combines AEC-Q101 qualification, SMA surface-mount compatibility, and full 1000 mW power handling - making it the only option qualified for automotive SMT production with industrial-grade thermal robustness.
Availability
SML4754AHE3_A/I is available at Aetrix Electronics and suitable for automotive ECU design, industrial PLC protection circuits, and medical power supply feedback networks requiring stable component supply, traceable sourcing, and long-lifecycle support.
Supply support for SML4754AHE3_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 targets surface-mount Zener regulation in space-constrained, high-reliability applications - designed specifically to replace through-hole Zeners while maintaining AEC-Q101 compliance and thermal performance.
FAQ
What is the exact zener voltage tolerance for SML4754AHE3_A/I?
The SML4754AHE3_A/I has a nominal zener voltage of 39 V with ±5 % tolerance, as indicated by the "A" suffix in the part number and confirmed in the Electrical Characteristics table on page 3 of Vishay document 85782. This tolerance applies at IZT1 = 6.5 mA and Tamb = 25 °C. The SML4754AHE3_A/I maintains this specification across its qualified operating temperature range.
Is SML4754AHE3_A/I suitable for automotive applications?
Yes, the SML4754AHE3_A/I is AEC-Q101 qualified, as denoted by the "HE3_A/I" ordering code variant (per Vishay's mechanical data section). It is rated for junction temperatures up to 150 °C and qualified for use in engine control units, body electronics, and ADAS subsystems where robust voltage reference or overvoltage protection is required.
What is the maximum power dissipation of SML4754AHE3_A/I at 100 °C ambient?
The SML4754AHE3_A/I has a maximum power dissipation of 1000 mW at lead temperature (TL) = 75 °C. At higher ambient temperatures, derating applies per Figure 1 in the datasheet. At Tamb = 100 °C with standard PCB mounting, usable power drops to approximately 450 mW - calculated using the specified thermal resistance and ambient-to-lead gradient. The SML4754AHE3_A/I must be thermally modeled in context of actual copper area and airflow.
Does SML4754AHE3_A/I have a defined surge current rating?
Yes, the SML4754AHE3_A/I is rated for 115 mApk non-repetitive surge current (IRM) with 8.3 ms pulse width, per JEDEC method, as listed in the Electrical Characteristics table. This rating reflects its ability to absorb transient energy without parametric shift or failure - critical for input-stage protection in industrial power supplies where the SML4754AHE3_A/I is commonly deployed.
What package type does SML4754AHE3_A/I use, and is it RoHS-compliant?
The SML4754AHE3_A/I uses the SMA (DO-214AC) surface-mount package, with dimensions and pad layout documented on page 5 of Vishay document 85782. It is RoHS-compliant, as confirmed by the "E3" suffix in the part number and the "Base P/N-E3 - RoHS-compliant, commercial grade" designation in the Mechanical Data section.
SML4754AHE3_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):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 29.7 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)
SML4754AHE3_A/I FAQ
1.How can I place an order for SML4754AHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SML4754AHE3_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 SML4754AHE3_A/I reliable?
The price and inventory of SML4754AHE3_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 SML4754AHE3_A/I is usually 5 days.
3.What payment methods are accepted for SML4754AHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SML4754AHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SML4754AHE3_A/I?
SML4754AHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SML4754AHE3_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 SML4754AHE3_A/I?
For technical support, including SML4754AHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SML4754AHE3_A/I requirements.
6.How does Aetrix verify that SML4754AHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SML4754AHE3_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 SML4754AHE3_A/I meets industry standards.
7.What is the process for return or replacement of SML4754AHE3_A/I?
All SML4754AHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SML4754AHE3_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 SML4754AHE3_A/I part is unused and in its original packaging.
Return procedure for SML4754AHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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