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Vishay General Semiconductor - Diodes Division 1N4754A-TR
- Part No.:
- 1N4754A-TR
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4754A-TR.pdf
- Description:
- DIODE ZENER 39V 1.3W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:47,757
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Product details
Overview
1N4754A-TR from Vishay Semiconductors is a silicon planar power Zener diode rated for 39 V nominal Zener voltage at 6.5 mA test current, with ±5 % tolerance, 1.3 W power dissipation, and DO-41 package. It operates as a precision voltage reference or shunt regulator in DC power supply feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N4754A-TR datasheet, 1N4754A-TR pinout, 1N4754A-TR application, or 1N4754A-TR equivalent, key selection criteria include Zener voltage accuracy, dynamic impedance (60 Ω at IZT), surge current capability (115 mA), thermal resistance (110 K/W), and DO-41 mechanical compatibility in board-level voltage regulation designs.
Technical Context
This device functions as a single-element, two-terminal shunt regulator where reverse-biased operation maintains stable voltage across load by conducting excess current when input exceeds VZ. Its thermal equilibrium Zener specification ensures stable regulation under steady-state DC conditions with lead temperature controlled at 30 °C ±1 °C.
The DO-41 package supports through-hole mounting with defined thermal path constraints: power derating begins above 50 °C ambient, and maximum junction temperature is limited to 175 °C. Absolute maximum ratings assume leads held at ambient temperature at 4 mm from case for 10 ms pulse conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V nominal, ±5 % tolerance - defines regulated output voltage in shunt configuration with 6.5 mA test current |
| Power Dissipation (Ptot) | 1300 mW - maximum continuous DC power at Tamb = 25 °C with specified lead thermal condition |
| Dynamic Impedance (ZZT) | 60 Ω at IZT = 6.5 mA - determines regulation stiffness and output voltage variation under load changes |
| Reverse Leakage Current (IR) | 5 μA max at VR = 29.7 V - sets minimum operating current threshold before full Zener conduction |
| Surge Current (IZM) | 115 mA - peak non-repetitive current capability for transient overvoltage clamping |
| Junction Temperature (Tj) | 175 °C max - constrains thermal design margin for PCB copper area and airflow in high-power applications |
| Forward Voltage (VF) | 1.2 V max at IF = 200 mA - relevant for polarity-check or forward-bias protection circuit integration |
Pinout & Package
DO-41 (DO-204AL) axial-leaded package with cathode identified by band marking; body diameter ≤2.6 mm, length ≥3.3 mm, lead diameter ≥0.7 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Zener reverse-current sink | Connected to lower-potential node in shunt regulator; carries full load current during regulation |
| Cathode | Forward current exit / Zener voltage reference node | Marked end; connected to regulated output rail; defines VZ potential relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| Silicon planar construction | Enables tight Zener voltage tolerance (±5 %) and repeatable breakdown characteristics across production lots |
| 1.3 W power rating | Supports direct regulation of medium-current analog rails (e.g., op-amp supplies) without external pass transistor |
| UL 94 V-0 molding compound | Meets flammability safety requirements for industrial and consumer power supply enclosures |
| MSL Level 1 rating | Permits unlimited floor life and standard reflow soldering without dry-pack or baking preconditioning |
| Thermal resistance RthJA = 110 K/W | Enables thermal modeling for PCB copper pour sizing when operating near Ptot limit at elevated ambient temperatures |
Applications
| Industrial Power Supply Feedback | Automotive ECU Reference |
|---|---|
Use Scenario: Stabilizing error amplifier reference in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 39 V feedback point for optocoupler-coupled regulation loop. Use Value: Maintains ±5 % output voltage accuracy across line/load/temperature with no active components required. | Use Scenario: Providing stable bias voltage for sensor signal conditioning circuitry in engine control units. IC Role / Device Role / Timing Role: Zener clamp protecting ADC reference inputs against transients while delivering low-noise 39 V rail. Use Value: Limits voltage excursions to safe levels during load dump events per ISO 7637-2 Pulse 5a. |
| LED Driver Overvoltage Protection | Test Equipment Calibration Reference |
Use Scenario: Clamping output voltage in constant-current LED drivers to prevent LED string overvoltage failure. IC Role / Device Role / Timing Role: Passive shunt limiter activated when driver output exceeds 39 V due to open-circuit or thermal runaway. Use Value: Absorbs up to 115 mA surge current without degradation, enabling robust field reliability. | Use Scenario: Serving as traceable voltage reference in portable multimeter or benchtop calibrator front-end circuits. IC Role / Device Role / Timing Role: Precision shunt regulator establishing known 39 V node for DAC output scaling and offset trimming. Use Value: Delivers stable regulation with 60 Ω dynamic impedance, minimizing measurement uncertainty in 4½-digit instruments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4754A-TAP | Same electrical specs and DO-41 package; supplied in ammopack instead of tape-and-reel | No functional difference; selected for manual assembly or low-volume prototyping | Choose 1N4754A-TAP when reel handling is not required and smaller packaging format is preferred |
| BZX85C39 | 39 V Zener, ±5 %, but rated for 1.3 W in DO-41 with higher typical ZZT (70 Ω vs. 60 Ω) and different surge rating (100 mA vs. 115 mA) | Suitable for general-purpose stabilization but less optimal for high-precision or high-surge environments | Choose BZX85C39 only if tighter dynamic impedance or higher surge margin is not critical to system performance |
Compared with 1N4754A-TR, the 1N4754A-TAP offers identical electrical behavior in a different packaging format, while BZX85C39 provides similar voltage regulation with measurable trade-offs in regulation stiffness and transient handling-making 1N4754A-TR preferable for applications demanding tighter Zener impedance and higher surge resilience.
Availability
1N4754A-TR is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, LED driver protection, and test equipment calibration requiring stable component supply and consistent Zener voltage performance.
Supply support for 1N4754A-TR 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 manufacturer specializing in discrete semiconductors, passive components, and sensors, with emphasis on reliability, precision, and high-power handling.
The 1N47xxA series is designed for high-stability voltage regulation in power conversion, protection, and reference applications-targeting cost-sensitive yet performance-critical systems where ±5 % Zener tolerance and 1.3 W dissipation meet industrial and automotive requirements.
FAQ
What is the Zener voltage tolerance for the 1N4754A-TR?
The 1N4754A-TR has a nominal Zener voltage of 39 V with a tolerance of ±5 %, meaning the actual measured VZ falls between 37.05 V and 40.95 V when tested at IZT = 6.5 mA under thermal equilibrium conditions. This tolerance is guaranteed per Vishay's Rev. 2.7 datasheet (Document Number: 85816) and applies to all units in the 1N4754A-TR production lot.
Can the 1N4754A-TR be used in surface-mount designs?
No, the 1N4754A-TR uses the DO-41 (DO-204AL) axial-leaded package and is intended for through-hole mounting only. It lacks SMD-compatible terminations or footprint dimensions. For surface-mount equivalents, engineers should evaluate devices such as the BZT03-C39 or SMAJ39A, which differ electrically and thermally from the 1N4754A-TR.
What is the maximum surge current rating for the 1N4754A-TR?
The 1N4754A-TR has a non-repetitive peak surge current (IZM) rating of 115 mA, specified at tp = 10 ms. This value reflects its capability to absorb short-duration overvoltage transients without parametric shift or failure, provided thermal limits are respected. The surge rating is confirmed in the Electrical Characteristics table of the Vishay 85816 datasheet.
How does the 1N4754A-TR behave under elevated ambient temperatures?
The 1N4754A-TR must be derated linearly above 50 °C ambient temperature, as shown in Fig. 1 of the Vishay datasheet. At 100 °C ambient, its usable power dissipation drops to approximately 650 mW. This derating stems from its RthJA of 110 K/W and maximum Tj of 175 °C, and must be accounted for in thermal layout design.
Is the 1N4754A-TR RoHS-compliant and halogen-free?
Yes, the 1N4754A-TR complies with RoHS Directive 2011/65/EU and is halogen-free per Vishay's material categorization policy (www.vishay.com/doc?99912). Its molding compound meets UL 94 V-0 flammability rating, and full compliance documentation is available upon request from Vishay's [email protected] support channel.
1N4754A-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 39 V
- Tolerance:
- ±5%
- Power - Max:
- 1.3 W
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 29.7 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
1N4754A-TR FAQ
1.How can I place an order for 1N4754A-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4754A-TR 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 1N4754A-TR reliable?
The price and inventory of 1N4754A-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4754A-TR is usually 5 days.
3.What payment methods are accepted for 1N4754A-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4754A-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4754A-TR?
1N4754A-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4754A-TR 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 1N4754A-TR?
For technical support, including 1N4754A-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4754A-TR requirements.
6.How does Aetrix verify that 1N4754A-TR is sourced from the original manufacturer or authorized distributors?
All 1N4754A-TR 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 1N4754A-TR meets industry standards.
7.What is the process for return or replacement of 1N4754A-TR?
All 1N4754A-TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4754A-TR, 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 1N4754A-TR part is unused and in its original packaging.
Return procedure for 1N4754A-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4754A-TR Tags
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