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onsemi 1N4752A-T50A
- Part No.:
- 1N4752A-T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4752A-T50A.pdf
- Description:
- DIODE ZENER 33V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:5,580
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Product details
Overview
1N4752A-T50A from ON Semiconductor is a 33 V, 1.0 W axial-leaded Zener diode in DO-41 glass package, rated for ±5% tolerance at 33 mA test current, with 7.5 Ω typical dynamic impedance and 5 µA maximum leakage at 25.1 V reverse voltage. It provides stable voltage reference in power supply regulation and overvoltage protection circuits.
For engineers reviewing the 1N4752A-T50A datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, thermal derating (6.67 mW/°C above 50°C), junction temperature range (–65°C to +200°C), and DO-41 mechanical compatibility in legacy through-hole designs.
Technical Context
The 1N4752A-T50A operates as a silicon planar Zener diode optimized for precision voltage clamping and regulation in DC power rails. Its 33 V nominal breakdown voltage is specified at 33 mA test current (IZ), with tight 5% tolerance and low 7.5 Ω dynamic impedance (ZZ) ensuring minimal voltage deviation under load variation.
It features a –65°C to +200°C operating temperature range, 1.0 W power dissipation at TL ≤ 50°C with 6.67 mW/°C linear derating, and 5 µA maximum leakage current at VR = 25.1 V - enabling reliable operation in industrial and automotive ambient environments without active cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V nominal, min 31.35 V / max 34.65 V at IZ = 33 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 1.0 W at lead temperature ≤ 50°C - sets maximum continuous power handling before thermal derating applies |
| Zener Impedance (ZZ) | 7.5 Ω typical at IZ = 33 mA - determines AC ripple rejection and regulation stiffness in feedback paths |
| Leakage Current (IR) | ≤ 5 µA at VR = 25.1 V - ensures minimal standby current draw in high-impedance bias networks |
| Operating Temp Range | –65°C to +200°C - supports deployment in under-hood automotive, industrial control, and aerospace environments |
| Tolerance | ±5% - enables predictable voltage margining in safety-critical overvoltage clamp designs |
| Package | DO-41 glass case with cathode band - standard axial through-hole footprint compatible with legacy PCB tooling and wave soldering |
Pinout & Package
DO-41 glass package: axial leads, cathode indicated by color band; no polarity-sensitive terminals beyond anode/cathode distinction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-bias regulation; carries full load current during Zener conduction |
| Cathode | Zener breakdown terminal | Marked with color band; connected to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| Stable 33 V Zener voltage | Guaranteed 31.35–34.65 V range at 33 mA enables precise rail clamping without post-production trimming |
| Low dynamic impedance | 7.5 Ω typical ensures <100 mV output shift across 10–50 mA load changes - critical for analog reference stability |
| High-temperature operation | Rated to +200°C junction temperature supports use in engine-control modules and power converters near heat sources |
| Standard DO-41 footprint | Enables drop-in replacement in existing designs using 1N47xxA series; no PCB redesign required for migration |
| 5% voltage tolerance | Reduces BOM complexity vs. tighter-tolerance parts while maintaining sufficient margin for most industrial supply rails |
Applications
| Power Supply Voltage Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits (e.g., LM317-based adjustable supplies). IC Role / Device Role / Timing Role: Zener diode providing fixed reference voltage to error amplifier input. Use Value: Maintains ±1.5% output regulation over line/load variations due to 7.5 Ω ZZ and 5% VZ tolerance. |
Use Scenario: Protecting microcontroller I/O pins from transient surges on 24 V industrial sensor lines. IC Role / Device Role / Timing Role: Shunt clamp limiting voltage to 34.65 V peak during ESD or inductive kick events. Use Value: Absorbs up to 1.0 W surge energy without degradation, verified per non-repetitive IZSM = 135 mA rating. |
| DC-DC Converter Feedback | Temperature-Stable Bias Network |
Use Scenario: Setting output voltage in isolated flyback converters via optocoupler feedback path. IC Role / Device Role / Timing Role: Precision voltage reference in secondary-side error amplifier circuit. Use Value: Delivers stable 33 V reference across –40°C to +125°C ambient, supported by wide TJ range and low TC drift. |
Use Scenario: Generating temperature-compensated bias for op-amp input stages in measurement front-ends. IC Role / Device Role / Timing Role: Zener element in compensated voltage divider with NTC thermistor. Use Value: Enables <±0.5%/°C effective tempco via matched thermal tracking between 1N4752A-T50A and resistor network. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4752A-TP | Same electrical specs; tape-and-reel packaging (vs. bulk T50A); identical DO-41 case and marking | No functional difference; selected for automated SMT placement compatibility despite axial form factor | Choose 1N4752A-TP for pick-and-place assembly; choose 1N4752A-T50A for manual prototyping or wave-solder production |
| BZX55C33 | 33 V ±5%, 500 mW rating, DO-35 package; higher ZZ (10 Ω typ), wider temp range (–65°C to +175°C) | Limited to lower-power applications; unsuitable where 1.0 W dissipation or +200°C operation is required | Select BZX55C33 only when board space constraints favor smaller DO-35 or power demand stays below 0.5 W |
Compared with 1N4752A-T50A, 1N4752A-TP offers identical performance in tape-and-reel format for automated assembly, while BZX55C33 trades 0.5 W lower power and higher impedance for smaller footprint - making 1N4752A-T50A optimal for high-reliability 1 W regulation where thermal margin and long-term stability are critical.
Availability
1N4752A-T50A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with consistent DO-41 mechanical fit and 33 V Zener performance.
Supply support for 1N4752A-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 power management, analog, sensors, and discrete devices, with emphasis on energy-efficient and high-reliability solutions.
The 1N47xxA series was designed for general-purpose voltage regulation and clamping in cost-sensitive, high-volume industrial and consumer applications - prioritizing robustness, wide temperature operation, and legacy package compatibility.
FAQ
What is the Zener voltage tolerance of the 1N4752A-T50A?
The 1N4752A-T50A has a ±5% Zener voltage tolerance, meaning its breakdown voltage falls between 31.35 V and 34.65 V when measured at the specified 33 mA test current and 25°C junction temperature. This tolerance is guaranteed across the full operating temperature range and is marked directly on the device as "A" in the third line of the top mark.
Can the 1N4752A-T50A be used in surface-mount designs?
No - the 1N4752A-T50A uses a DO-41 axial glass package with 0.25-inch lead spacing, intended for through-hole mounting. It is not compatible with SMT reflow processes. For surface-mount equivalents, consider SOD-123 or SOD-323 packaged Zeners like MMBZ5263B, but note differences in power rating and thermal performance versus the 1N4752A-T50A.
What is the maximum allowable junction temperature for the 1N4752A-T50A?
The 1N4752A-T50A has a maximum junction temperature (TJ) rating of +200°C, with a storage temperature range extending from –65°C to +200°C. This allows operation in high-ambient environments such as engine compartments or enclosed power enclosures, provided power dissipation remains within derated limits above 50°C lead temperature.
How does the 1N4752A-T50A compare to the 1N4751A in terms of voltage and impedance?
The 1N4752A-T50A is rated for 33 V nominal Zener voltage (min 31.35 V, max 34.65 V), whereas the 1N4751A is rated for 30 V (min 28.5 V, max 31.5 V). The 1N4752A-T50A also exhibits lower typical Zener impedance (7.5 Ω vs. 8.5 Ω for 1N4751A at respective test currents), improving regulation accuracy under dynamic load conditions.
Is the 1N4752A-T50A RoHS compliant and halogen-free?
Yes - the 1N4752A-T50A meets RoHS Directive 2011/65/EU requirements and is halogen-free per ON Semiconductor's material declarations. Compliance is documented in the official device datasheet (1N4736AT/D, Rev. 8) and verified through certified supply chain traceability; no exemptions apply to this part number.
1N4752A-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):
- 33 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 25.1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4752A-T50A FAQ
1.How can I place an order for 1N4752A-T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4752A-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 1N4752A-T50A reliable?
The price and inventory of 1N4752A-T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4752A-T50A is usually 5 days.
3.What payment methods are accepted for 1N4752A-T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4752A-T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4752A-T50A?
1N4752A-T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4752A-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 1N4752A-T50A?
For technical support, including 1N4752A-T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4752A-T50A requirements.
6.How does Aetrix verify that 1N4752A-T50A is sourced from the original manufacturer or authorized distributors?
All 1N4752A-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 1N4752A-T50A meets industry standards.
7.What is the process for return or replacement of 1N4752A-T50A?
All 1N4752A-T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N4752A-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 1N4752A-T50A part is unused and in its original packaging.
Return procedure for 1N4752A-T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4752A-T50A Tags
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