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onsemi 1N4754A_T50R
- Part No.:
- 1N4754A_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4754A_T50R.pdf
- Description:
- DIODE ZENER 39V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:6,274
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Product details
Overview
1N4754A_T50R from ON Semiconductor is a 39 V, 1 W Zener diode in DO-41 glass package, rated for ±5% tolerance, 6.67 mW/°C derating above 50°C, and operating from −65°C to +200°C. It regulates voltage in power supply feedback loops, overvoltage protection circuits, and reference voltage generation for analog sensors and ADCs.
For engineers reviewing the 1N4754A_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage (39 V min/typ/max), test current (1 mA), dynamic impedance (6.5 Ω at IZ), leakage current (5 µA at 31.2 V), and non-repetitive peak reverse current (115 mA).
Technical Context
This device operates as a silicon planar Zener diode with sharp reverse breakdown characteristics, designed for stable DC voltage regulation under fixed-current bias. Its 39 V nominal zener voltage is specified at 1 mA test current, with typical dynamic impedance of 6.5 Ω and knee impedance of 50 Ω at 0.25 mA.
The 1N4754A_T50R exhibits low temperature coefficient near zero crossing and maintains regulation across its full operating temperature range (−65°C to +200°C), supported by 1.0 W power dissipation at lead temperature ≤50°C and linear derating beyond that point.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 37.05 V (min) to 40.95 V (max) at 1 mA - defines regulation band for precision reference use |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - sets maximum continuous thermal load on PCB traces |
| Zener Impedance (ZZ) | 6.5 Ω @ IZ = 1 mA - determines output voltage stability under load variation |
| Leakage Current (IR) | 5 µA @ VR = 31.2 V - ensures minimal error current in high-impedance bias networks |
| Operating Temp Range | −65°C to +200°C - enables deployment in automotive engine compartments and industrial motor controls |
| Derating Factor | 6.67 mW/°C above 50°C - required for thermal design margin calculation in enclosed environments |
| Non-Repetitive Peak IRSM | 115 mA @ 8.3 ms - supports transient surge suppression in clamp configurations |
Pinout & Package
DO-41 glass axial package with cathode indicated by a single color band. Leads are tinned copper-clad steel; case is hermetically sealed glass with axial leads suitable for through-hole mounting and wave soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reverse breakdown reference node | Connected to lower potential side in shunt regulator configuration; forms return path for zener current |
| Cathode | Zener voltage reference terminal | Marked with color band; connected to regulated output node; defines VZ relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener Voltage Tolerance | Enables predictable regulation without post-assembly trimming in cost-sensitive consumer power supplies |
| Low Dynamic Impedance (6.5 Ω) | Maintains <1% output deviation across 10–100% load current changes in feedback references |
| High Surge Current Rating (115 mA) | Withstands ESD and line transients without degradation in clamp applications |
| Wide Operating Temperature Range | Supports operation in under-hood automotive modules and outdoor industrial controllers without derating penalties |
| DO-41 Mechanical Standardization | Ensures compatibility with legacy wave-solder tooling and automated insertion equipment |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference Voltage |
|---|---|
Use Scenario: Provides precise 39 V reference for optocoupler-based feedback in offline AC/DC converters. IC Role / Device Role / Timing Role: Shunt voltage reference defining secondary-side regulation threshold. Use Value: Enables ±1% output voltage accuracy over line/load/temperature with minimal external components. | Use Scenario: Supplies stable bias voltage to bridge-type pressure transducers in factory automation systems. IC Role / Device Role / Timing Role: Precision DC reference source for ratiometric analog signal conditioning. Use Value: Reduces sensor offset drift to <0.05%/°C by replacing resistive dividers with temperature-stable zener regulation. |
| Overvoltage Clamp for Microcontroller I/O | Programmable Threshold Detector |
Use Scenario: Protects 3.3 V GPIO pins from 12 V rail faults in automotive body control modules. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping fault energy before IC damage. Use Value: Limits pin voltage to 39 V during 100 ns surges while dissipating up to 1.0 W peak power. | Use Scenario: Sets trip point for comparator-based battery undervoltage lockout in portable medical devices. IC Role / Device Role / Timing Role: Stable voltage threshold generator enabling repeatable 3.3 V system reset behavior. Use Value: Delivers <20 mV hysteresis shift over −40°C to +85°C, eliminating false resets during thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4754A-TP (Micro Commercial) | Same 39 V nominal, ±5% tolerance, DO-41 package, but 1.3 W PD rating and 7.5 Ω ZZ | Slightly higher power handling allows longer surge duration; higher ZZ reduces regulation precision | Select when extended surge immunity is prioritized over tight voltage stability |
| BZX55-C39 (Vishay) | 39 V nominal, ±5%, DO-35 package, 500 mW PD, 10 Ω ZZ, 100 °C max TJ | Lower power rating and narrower temperature range limit use to low-power signal-level circuits | Choose only for space-constrained PCBs where 500 mW dissipation suffices and ambient stays below 70°C |
Compared with 1N4754A_T50R, the 1N4754A-TP offers higher surge resilience at the cost of regulation accuracy, while BZX55-C39 trades power and thermal capability for smaller footprint-making the 1N4754A_T50R optimal for industrial-grade 1 W regulation where thermal robustness and precision are jointly required.
Availability
1N4754A_T50R is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor interfaces, and overvoltage protection circuits requiring stable component supply and long-term lifecycle support.
Supply support for 1N4754A_T50R 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 management, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N47xxA series is part of ON Semiconductor's legacy Zener diode portfolio, engineered for high-reliability voltage regulation in cost-sensitive, high-volume power and protection applications.
FAQ
What is the exact zener voltage range for 1N4754A_T50R at 25°C?
The 1N4754A_T50R has a guaranteed zener voltage range of 37.05 V (minimum) to 40.95 V (maximum) when measured at 1 mA test current and 25°C ambient. This ±5% tolerance is verified per ON Semiconductor's 1N4728A–1N4758A datasheet Rev. 8, October 2017. The typical value is 39 V, and the 1N4754A_T50R must meet these limits to be compliant.
Can 1N4754A_T50R replace 1N4753A in a 36 V reference circuit?
No, 1N4754A_T50R is not a direct replacement for 1N4753A because its nominal zener voltage is 39 V versus 36 V for the 1N4753A. Substituting 1N4754A_T50R would raise the regulated voltage by ~3 V, potentially exceeding downstream component ratings. The 1N4754A_T50R must only be used where 39 V regulation is explicitly required.
What is the maximum allowable junction temperature for 1N4754A_T50R?
The 1N4754A_T50R has a maximum junction temperature (TJ) of +200°C, matching its storage temperature limit. This rating is specified in the Absolute Maximum Ratings table of the official ON Semiconductor datasheet. Thermal design must ensure that power dissipation and PCB layout keep actual TJ below this limit under worst-case ambient and airflow conditions.
Does 1N4754A_T50R have a specified temperature coefficient?
The 1N4754A_T50R does not list a discrete temperature coefficient value in its datasheet, but its zener voltage drift over −65°C to +200°C is characterized via min/typ/max VZ data across temperature. For 39 V-class devices, typical TC is near zero around 35–45 V, meaning 1N4754A_T50R exhibits minimal VZ shift per degree Celsius near room temperature-critical for stable reference designs.
Is the DO-41 package of 1N4754A_T50R RoHS compliant?
Yes, the DO-41 package used for 1N4754A_T50R is RoHS compliant per ON Semiconductor's product change notices and material declarations. Lead finish is matte tin, and the glass body contains no restricted substances above EU RoHS thresholds. Compliance documentation for 1N4754A_T50R is available through ON Semiconductor's quality portal using the full part number.
1N4754A_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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_T50R FAQ
1.How can I place an order for 1N4754A_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4754A_T50R 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_T50R reliable?
The price and inventory of 1N4754A_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4754A_T50R is usually 5 days.
3.What payment methods are accepted for 1N4754A_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4754A_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4754A_T50R?
1N4754A_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4754A_T50R 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_T50R?
For technical support, including 1N4754A_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4754A_T50R requirements.
6.How does Aetrix verify that 1N4754A_T50R is sourced from the original manufacturer or authorized distributors?
All 1N4754A_T50R 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_T50R meets industry standards.
7.What is the process for return or replacement of 1N4754A_T50R?
All 1N4754A_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N4754A_T50R, 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_T50R part is unused and in its original packaging.
Return procedure for 1N4754A_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4754A_T50R Tags
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