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Microchip Technology 1N4752P/TR8
- Part No.:
- 1N4752P/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4752P/TR8.pdf
- Description:
- DIODE ZENER 33V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,171
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Product details
Overview
1N4752P/TR8 from Microsemi is a 33 V, 1 W axial-lead Zener diode in DO-41 plastic package with ±5% voltage tolerance, 7.5 mA test current, and 45 Ω dynamic impedance at IZT, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4752P/TR8 datasheet, 1N4752P/TR8 pinout, 1N4752P/TR8 application, or 1N4752P/TR8 equivalent, key selection factors include Zener voltage accuracy, thermal resistance (45 °C/W junction-to-lead), surge current rating (1000 mA), and RoHS-compliant tin plating per MIL-STD-750 Method 2026.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable 33 V output across 1–100 mA regulation current range, with temperature coefficient of +15 mV/°C typical. Its DO-41 package enables through-hole mounting with 0.7 g mass and UL94V-0 epoxy body.
Designed for operation at lead temperature ≤105 °C or ambient ≤45 °C on FR4 board, it delivers 1.0 W steady-state dissipation with 105 °C/W junction-to-ambient thermal resistance under standard PCB layout (4 mm² copper pad, 1 mm track width).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at 7.5 mA - defines regulated output level with tight tolerance for reference stability |
| Power Dissipation | 1.0 W at TL < 105 °C - sets maximum continuous thermal load without derating |
| Dynamic Impedance | 45 Ω at IZT = 7.5 mA - determines output voltage variation under load transients |
| Reverse Leakage | 5 μA max at VR = 25.1 V - ensures low standby current in high-impedance bias networks |
| Surge Current (ISM) | 1000 mA peak - supports transient overvoltage clamping without failure |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design using lead length as heatsink path |
| Operating Temp | −65 °C to +150 °C - qualifies for industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by band; banded end must be held positive relative to anode for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; forms return path for Zener current |
| Cathode | Regulated output node | Banded end supplies stable 33 V when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Fully compliant with 1N47xxA series standards for interchangeability and testing |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - safe for manual handling without special precautions |
| RoHS-compliant plating | Annealed matte-tin terminals meet lead-free soldering requirements (e3 suffix) |
| Low thermal resistance | 45 °C/W junction-to-lead - superior to glass-body variants for thermal management |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Providing stable 33 V reference for linear regulator feedback or ADC reference divider. IC Role / Device Role / Timing Role: Voltage reference element establishing precise DC bias point. Use Value: ±5% VZ tolerance and 45 Ω ZZT ensure <±0.5 V drift over 1–50 mA load range. | Use Scenario: Clamping transient surges on 24 V industrial control bus lines. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy to ground. Use Value: 1000 mA surge rating and −65 °C to +150 °C operating range support robust field deployment. |
| Signal Level Translation | Current Source Biasing |
Use Scenario: Generating fixed 33 V rail for op-amp input stage biasing in sensor interface circuits. IC Role / Device Role / Timing Role: Passive voltage translation node setting common-mode voltage. Use Value: Low 5 μA leakage at 25.1 V ensures minimal error injection into high-impedance analog nodes. | Use Scenario: Establishing constant-current source for LED driver or photodiode amplifier. IC Role / Device Role / Timing Role: Stable voltage node enabling predictable IOUT via series resistor. Use Value: 1.0 W power rating allows >30 mA current sourcing with adequate margin at TL ≤ 105 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4752A | No TR8 tape-and-reel packaging; bulk or ammo pack only | Lacks standardized reel format for automated SMT placement | Select 1N4752P/TR8 for pick-and-place production; use 1N4752A for prototyping or hand-soldered builds |
| MMBZ5255BS | Surface-mount SOT-23 package; 33 V, 225 mW, ±5% | Lower power rating and different thermal profile limits PCB layout reuse | Choose MMBZ5255BS only when space-constrained layouts require SMD; verify thermal derating on target board |
Compared with 1N4752A and MMBZ5255BS, the 1N4752P/TR8 uniquely combines DO-41 mechanical robustness, 1 W power handling, and EIA-296 tape-and-reel compatibility-making it optimal for high-reliability through-hole manufacturing where thermal margin and assembly automation are both critical.
Availability
1N4752P/TR8 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and signal level translation requiring stable component supply, consistent tape-and-reel delivery, and long-term industrial lifecycle support.
Supply support for 1N4752P/TR8 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
Microsemi (now part of Microchip Technology) designs high-reliability analog and mixed-signal semiconductors for aerospace, defense, and industrial applications.
The 1N47xxA Zener series was developed to deliver JEDEC-standardized, thermally robust voltage regulation in plastic axial packages for cost-sensitive yet mission-critical power and protection circuits.
FAQ
What is the Zener voltage tolerance of the 1N4752P/TR8?
The 1N4752P/TR8 has a nominal Zener voltage of 33 V with ±5% tolerance, as indicated by the "A" suffix in its JEDEC designation. This tolerance is verified at 7.5 mA test current and 25 °C lead temperature, ensuring predictable regulation performance across production lots and operating conditions.
Does the 1N4752P/TR8 require dry packing before PCB assembly?
No, the 1N4752P/TR8 is moisture sensitivity level 1 per IPC/JEDEC J-STD-020B, meaning it does not require dry packing or baking prior to reflow or wave soldering. Its void-free epoxy body and Level 1 classification eliminate moisture-related assembly risks.
What is the maximum surge current rating for the 1N4752P/TR8?
The 1N4752P/TR8 supports a maximum non-repetitive surge current (ISM) of 1000 mA, measured using a ½ sine-wave pulse of 1/120 second duration at 25 °C ambient. This rating enables reliable transient clamping in industrial power line protection applications.
Is the 1N4752P/TR8 RoHS compliant?
Yes, the 1N4752P/TR8 carries the "e3" suffix per Microsemi documentation, indicating RoHS-compliant annealed matte-tin terminal plating that meets lead-free soldering requirements and passes MIL-STD-750 Method 2026 solderability testing.
How does the thermal resistance of the 1N4752P/TR8 compare to glass-body Zeners?
The 1N4752P/TR8 exhibits 45 °C/W junction-to-lead thermal resistance-lower than equivalent glass-body (G-suffix) versions-due to its plastic encapsulation's improved thermal coupling to leads. This allows higher sustained power dissipation at equivalent lead temperatures.
1N4752P/TR8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 33 V
- Tolerance:
- ±10%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 25.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
1N4752P/TR8 FAQ
1.How can I place an order for 1N4752P/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4752P/TR8 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 1N4752P/TR8 reliable?
The price and inventory of 1N4752P/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4752P/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4752P/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4752P/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4752P/TR8?
1N4752P/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4752P/TR8 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 1N4752P/TR8?
For technical support, including 1N4752P/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4752P/TR8 requirements.
6.How does Aetrix verify that 1N4752P/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4752P/TR8 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 1N4752P/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4752P/TR8?
All 1N4752P/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4752P/TR8, 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 1N4752P/TR8 part is unused and in its original packaging.
Return procedure for 1N4752P/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4752P/TR8 Tags
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