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Microchip Technology 1N4752CP/TR8
- Part No.:
- 1N4752CP/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4752CP/TR8.pdf
- Description:
- DIODE ZENER 33V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,993
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Product details
Overview
1N4752CP/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 1N4752CP/TR8 datasheet, 1N4752CP/TR8 pinout, 1N4752CP/TR8 application, or 1N4752CP/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45 °C/W junction-to-lead), surge current rating (1000 mA), RoHS-compliant "e3" plating, and tape-and-reel packaging (TR8).
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable 33 V regulation across 1–200 mA operating current and −65 °C to +150 °C temperature range. Its 45 °C/W junction-to-lead thermal resistance enables reliable 1 W dissipation at 3/8″ lead length, while the 27 Ω knee impedance at 0.25 mA supports low-current reference stability.
The device features a cathode band marking, tin-lead or matte-tin plating per MIL-STD-750 Method 2026, and moisture sensitivity level 1 per J-STD-020B - eliminating dry pack requirements. It is not ESD-sensitive per MIL-STD-750 Method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at 7.5 mA - defines nominal regulation point with tight production control for reference accuracy |
| Power Dissipation | 1.0 W at TL < 105 °C - supports continuous operation with standard lead-mount thermal management |
| Dynamic Impedance (ZZT) | 45 Ω at IZT = 7.5 mA - ensures minimal output voltage variation under load current changes |
| Max Reverse Current (IR) | 5 μA at VR = 25.1 V - guarantees low leakage below regulation threshold for stable biasing |
| Surge Current (ISM) | 1000 mA (½-sine, 1/120 s) - withstands transient overvoltage events without degradation |
| Thermal Resistance | 45 °C/W junction-to-lead - enables predictable derating when mounted with 10 mm lead length |
| Operating Temperature | −65 °C to +150 °C - suitable for industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with void-free UL94V-0 epoxy body and cathode indicated by colored band. Terminals are tin-lead or RoHS-compliant matte-tin plated for solderability per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node; forward voltage ≤1.2 V @ 200 mA for polarity verification |
| Cathode | Banded end | Connected to higher-potential node during Zener operation; defines regulation reference point |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1 W Zener | Fully compliant with JEDEC 1N47xxA series standards for interchangeability and test methodology |
| Plastic P-suffix construction | Lower thermal resistance vs. glass-body (G-suffix) variants - improves power handling in compact layouts |
| RoHS-compliant "e3" suffix | Matte-tin plating meets EU RoHS Directive 2011/65/EU and China RoHS II without lead exemption |
| Tape-and-reel packaging (TR8) | EIA-296 standard reel format - enables automated SMT placement of axial devices via carrier tape |
| MIL-STD-750 qualified | ESD immunity per Method 1020 and solderability per Method 2026 - validated for high-reliability assembly |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or ADC reference buffers. IC Role / Device Role / Timing Role: Provides fixed 33 V reference against which error amplifiers compare output voltage. Use Value: 45 Ω ZZT and ±5% VZ tolerance ensure <±0.5 V regulation drift across 1–100 mA load range. |
Use Scenario: Protecting microcontroller I/O pins from transient surges exceeding 33 V. IC Role / Device Role / Timing Role: Shunts excess energy to ground when input voltage exceeds 33 V breakdown threshold. Use Value: 1000 mA surge rating and 27 Ω ZZK at 0.25 mA enable fast clamping without thermal runaway. |
| DC-DC Converter Feedback | Industrial Sensor Excitation |
|
Use Scenario: Setting output voltage in isolated flyback or forward converter feedback networks. IC Role / Device Role / Timing Role: Serves as primary voltage sense element in optocoupler-coupled feedback loop. Use Value: −65 °C to +150 °C operating range and 45 °C/W thermal resistance support stable operation in enclosed power modules. |
Use Scenario: Providing stable excitation voltage for resistive bridge sensors in process control transmitters. IC Role / Device Role / Timing Role: Delivers regulated 33 V bias to strain gauge or RTD bridges independent of supply ripple. Use Value: 5 μA max reverse leakage at 25.1 V ensures minimal current error in high-impedance sensor interfaces. |
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 "P" (plastic) or "TR8" suffix - bulk-packaged, non-RoHS tin-lead plating | Lacks tape-and-reel automation support and RoHS compliance; same electrical specs | Select when manual assembly or legacy Pb-based processes are used |
| MMBZ5257BS-7-F | SOT-23 surface-mount package, 33 V ±5%, 200 mW rating, 30 Ω ZZT | Lower power and smaller footprint; unsuitable for 1 W continuous dissipation | Select only for space-constrained, low-power biasing where thermal mass is limited |
Compared with 1N4752A and MMBZ5257BS-7-F, the 1N4752CP/TR8 uniquely combines 1 W power handling, DO-41 axial form factor for through-hole reliability, RoHS-compliant "e3" plating, and EIA-296 tape-and-reel delivery - making it optimal for industrial power supplies requiring long-term supply continuity and automated manufacturing.
Availability
1N4752CP/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning, and overvoltage protection circuits requiring stable component supply with RoHS compliance and automated assembly support.
Supply support for 1N4752CP/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) is a U.S.-based semiconductor company specializing in high-reliability analog and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4752CP/TR8 belongs to Microsemi's legacy 1N47xxAP Zener series, engineered for robust voltage regulation in harsh-environment power systems where thermal stability, surge resilience, and long-term parametric consistency are critical.
FAQ
What is the Zener voltage tolerance of the 1N4752CP/TR8?
The 1N4752CP/TR8 has a nominal Zener voltage of 33 V with a ±5% tolerance, as indicated by the "A" suffix in its JEDEC designation. This means the actual measured VZ falls between 31.35 V and 34.65 V at 7.5 mA test current and 25 °C lead temperature - verified per JEDEC 1N47xxA registration and Microsemi's REV C datasheet.
Does the 1N4752CP/TR8 support automated assembly?
Yes, the "TR8" suffix confirms EIA-296 standard tape-and-reel packaging for pick-and-place compatibility. The 1N4752CP/TR8 is supplied on 8 mm carrier tape with 1000 units per reel, enabling high-throughput automated insertion of this axial-leaded Zener diode in production lines using compatible feeders.
What is the maximum steady-state power dissipation for the 1N4752CP/TR8?
The 1N4752CP/TR8 is rated for 1.0 W steady-state power dissipation at lead temperature (TL) < 105 °C with 3/8″ (10 mm) lead length from body, or at ambient temperature (TA) < 45 °C when mounted on FR4 with specified copper pad geometry - per Microsemi's derating curve in Figure 1 of the datasheet.
Is the 1N4752CP/TR8 RoHS compliant?
Yes, the "e3" suffix in 1N4752CP/TR8 denotes RoHS-compliant matte-tin plating per EU Directive 2011/65/EU and China RoHS II. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and plating meets MIL-STD-750 Method 2026 solderability requirements.
What is the thermal resistance of the 1N4752CP/TR8?
The 1N4752CP/TR8 has a junction-to-lead thermal resistance of 45 °C/W when measured at 3/8″ (10 mm) lead length from body - enabling accurate thermal design for 1 W operation. Junction-to-ambient resistance is 105 °C/W on FR4 board with 4 mm² copper pads and 1 mm track width, as specified in Microsemi's mechanical ratings table.
1N4752CP/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:
- ±2%
- 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)
1N4752CP/TR8 FAQ
1.How can I place an order for 1N4752CP/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4752CP/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 1N4752CP/TR8 reliable?
The price and inventory of 1N4752CP/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4752CP/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4752CP/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4752CP/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4752CP/TR8?
1N4752CP/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4752CP/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 1N4752CP/TR8?
For technical support, including 1N4752CP/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4752CP/TR8 requirements.
6.How does Aetrix verify that 1N4752CP/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4752CP/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 1N4752CP/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4752CP/TR8?
All 1N4752CP/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4752CP/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 1N4752CP/TR8 part is unused and in its original packaging.
Return procedure for 1N4752CP/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4752CP/TR8 Tags
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