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onsemi 1N4754A-T50A
- Part No.:
- 1N4754A-T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4754A-T50A.pdf
- Description:
- DIODE ZENER 39V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:7,333
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Product details
Overview
1N4754A-T50A from ON Semiconductor is a 39 V, 1 W Zener diode in DO-41 glass package, rated for ±5% tolerance at 39 mA test current, with 6.5 Ω dynamic impedance and 5 μA leakage at 31.2 V reverse voltage. It provides stable voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4754A-T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy, thermal derating capability (6.67 mW/°C above 50°C), junction temperature range (–65°C to +200°C), and DO-41 mechanical compatibility in through-hole designs.
Technical Context
This device operates as a silicon planar Zener diode optimized for precision DC voltage regulation and clamping. Its design centers on stable breakdown behavior at 39 V nominal, with low dynamic impedance (6.5 Ω @ 39 mA) and tightly controlled leakage (≤5 μA @ 31.2 V).
The 1N4754A-T50A is characterized at 25°C ambient with 3/8″ lead length, supports non-repetitive peak reverse surge up to 115 mA (8.3 ms square wave), and maintains full functionality across –65°C to +200°C operating and storage temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V nominal, min 37.05 V / max 40.95 V at 39 mA - defines regulated output voltage under standard test conditions |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - maximum continuous power handling before thermal derating begins |
| Zener Impedance (ZZ) | 6.5 Ω @ IZ = 39 mA - low dynamic resistance ensures minimal output voltage variation with load current changes |
| Leakage Current (IR) | ≤5 μA @ VR = 31.2 V - guarantees low standby power loss in high-impedance bias networks |
| Operating Temperature | –65°C to +200°C - enables use in automotive under-hood, industrial control, and aerospace environments |
| Thermal Derating | 6.67 mW/°C above 50°C - quantifies safe power reduction per degree rise in lead temperature |
| Peak Reverse Surge | 115 mA (8.3 ms) - specifies transient overvoltage clamp capability without damage |
Pinout & Package
DO-41 glass axial package with cathode band marking; two-terminal device requiring no orientation-specific PCB layout beyond cathode identification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of circuit; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Marked by color band; connected to higher-potential side to enable reverse breakdown at VZ |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Ensures predictable regulation across production lots without post-assembly trimming |
| Low dynamic impedance (6.5 Ω) | Maintains tight output voltage stability under varying load currents in feedback networks |
| High surge capability (115 mA, 8.3 ms) | Withstands common transient events like ESD-induced line spikes without degradation |
| Wide temperature range (–65°C to +200°C) | Supports deployment in extreme environments including engine compartments and industrial ovens |
| DO-41 mechanical standardization | Enables drop-in replacement and compatibility with legacy through-hole assembly tooling |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stable 39 V reference in linear regulator feedback loop or ADC reference divider network. IC Role / Device Role / Timing Role: Voltage reference element providing precise DC bias point for error amplifiers or analog comparators. Use Value: 6.5 Ω impedance minimizes reference drift under load, while ±5% tolerance eliminates need for external calibration. | Use Scenario: Clamping transient surges on 36 V DC bus lines in automotive body control modules. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy to ground when bus voltage exceeds 39 V threshold. Use Value: 115 mA non-repetitive surge rating handles ISO 7637-2 pulse 1/2b transients without failure. |
| Voltage Monitor Threshold | Signal Level Translation |
Use Scenario: Detecting undervoltage condition in 42 V telecom power systems using comparator input tied to 39 V Zener node. IC Role / Device Role / Timing Role: Precision threshold generator setting trip point for supervisory ICs or microcontroller reset logic. Use Value: Tight 37.05–40.95 V range ensures reliable detection margin against system noise and drift. | Use Scenario: Biasing op-amp inputs in industrial sensor signal conditioning where 39 V rail defines common-mode range. IC Role / Device Role / Timing Role: DC level shifter establishing fixed offset between sensor output and amplifier input stage. Use Value: Low 5 μA leakage at 31.2 V prevents loading of high-impedance sensor outputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4754A-TP | Same electrical specs; tape-and-reel packaging (vs. bulk T50A); identical DO-41 case | No functional difference; selected for automated SMT-compatible through-hole placement | Choose 1N4754A-TP for pick-and-place integration; 1N4754A-T50A for manual or wave-solder prototyping |
| BZX85C39 | 39 V, 1.3 W, ±5%, DO-41 but higher leakage (≤10 μA @ 31.2 V) and higher ZZ (10 Ω) | Suitable for less critical references; not recommended for low-drift feedback loops | Select BZX85C39 only if cost sensitivity outweighs regulation precision requirements |
Compared with 1N4754A-T50A, the 1N4754A-TP offers identical performance in automated manufacturing, while BZX85C39 trades tighter impedance and lower leakage for broader vendor availability-making 1N4754A-T50A optimal for high-stability analog references.
Availability
1N4754A-T50A is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and voltage monitor threshold applications requiring stable component supply and long-term obsolescence management.
Supply support for 1N4754A-T50A 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N47xxA series delivers standardized, high-reliability Zener diodes for general-purpose voltage regulation and protection, designed to meet stringent automotive and industrial qualification standards.
FAQ
What is the nominal Zener voltage and tolerance of the 1N4754A-T50A?
The 1N4754A-T50A has a nominal Zener voltage of 39 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 37.05 V and 40.95 V when tested at 39 mA. This specification is verified per ON Semiconductor's 1N4728A–1N4758A datasheet Rev. 8, and applies strictly to the 1N4754A-T50A variant under standard thermal conditions (TL = 30°C ± 1°C, 3/8″ lead length).
What is the maximum power dissipation and thermal derating behavior of the 1N4754A-T50A?
The 1N4754A-T50A is rated for 1.0 W power dissipation at lead temperature (TL) ≤ 50°C, with linear derating of 6.67 mW/°C above that temperature. This means at 75°C lead temperature, its usable power drops to 0.833 W. The derating curve is defined in the Absolute Maximum Ratings table of the official ON Semiconductor datasheet for the 1N4754A-T50A.
Does the 1N4754A-T50A have a specified Zener impedance, and what does it mean for circuit design?
Yes, the 1N4754A-T50A has a maximum Zener impedance (ZZ) of 6.5 Ω measured at 39 mA test current. This low dynamic resistance means the output voltage varies only ~255 mV for a 39 mA load change-critical for maintaining regulation accuracy in feedback networks and precision references. The value is confirmed in the Electrical Characteristics table for the 1N4754A-T50A in ON Semiconductor's published documentation.
What is the leakage current specification for the 1N4754A-T50A, and at what reverse voltage is it measured?
The 1N4754A-T50A exhibits a maximum leakage current (IR) of 5 μA when subjected to a reverse voltage (VR) of 31.2 V-80% of its nominal Zener voltage. This low leakage ensures minimal parasitic current draw in high-impedance bias networks and voltage monitors, directly supporting low-power design goals in battery-operated or energy-sensitive systems using the 1N4754A-T50A.
Is the 1N4754A-T50A suitable for automotive under-hood applications?
Yes, the 1N4754A-T50A is qualified for operation from –65°C to +200°C, covering typical under-hood ambient ranges in automotive applications. Its DO-41 glass package and robust surge rating (115 mA, 8.3 ms) align with AEC-Q200 stress test requirements for passive components. While not AEC-Q200 certified out-of-box, the 1N4754A-T50A's published specifications fully support under-hood deployment when used within its rated electrical and thermal limits.
1N4754A-T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Cut Tape (CT)
- 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:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4754A-T50A FAQ
1.How can I place an order for 1N4754A-T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4754A-T50A 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-T50A reliable?
The price and inventory of 1N4754A-T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4754A-T50A is usually 5 days.
3.What payment methods are accepted for 1N4754A-T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4754A-T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4754A-T50A?
1N4754A-T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4754A-T50A 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-T50A?
For technical support, including 1N4754A-T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4754A-T50A requirements.
6.How does Aetrix verify that 1N4754A-T50A is sourced from the original manufacturer or authorized distributors?
All 1N4754A-T50A 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-T50A meets industry standards.
7.What is the process for return or replacement of 1N4754A-T50A?
All 1N4754A-T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N4754A-T50A, 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-T50A part is unused and in its original packaging.
Return procedure for 1N4754A-T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4754A-T50A Tags
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