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Microchip Technology 1N4752PE3/TR12
- Part No.:
- 1N4752PE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4752PE3/TR12.pdf
- Description:
- DIODE ZENER 33V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,961
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Product details
Overview
1N4752PE3/TR12 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 feedback loops and overvoltage protection circuits.
For engineers reviewing the 1N4752PE3/TR12 datasheet, 1N4752PE3/TR12 pinout, 1N4752PE3/TR12 application, or 1N4752PE3/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45 °C/W junction-to-lead), surge current rating (1000 mA), reverse leakage (<5 µA at 25.1 V), and RoHS-compliant matte-tin plating.
Technical Context
This device operates in reverse breakdown to maintain stable 33 V output across 1.0 mA to 135 mA DC regulation current, with a sharp knee at 0.25 mA test current (ZZK = 27 Ω) ensuring low-noise reference behavior. Its DO-41 package provides flexible through-hole mounting and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry pack.
Thermal performance is defined at two conditions: 1.0 W dissipation at lead temperature <105 °C (3/8″ from body) or ambient <45 °C on FR4 board with 4 mm² copper pads; forward voltage is ≤1.2 V at 200 mA, confirming robust conduction capability during transient forward events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at 7.5 mA - sets precise regulation point for feedback networks |
| Power Dissipation | 1.0 W at TL < 105 °C - defines maximum continuous thermal load in lead-mounted designs |
| Dynamic Impedance | 45 Ω at IZT = 7.5 mA - determines output voltage stability under load variation |
| Reverse Leakage | <5 µA at VR = 25.1 V - ensures minimal quiescent current in standby regulation |
| Surge Current | 1000 mA (½-sine, 1/120 s) - supports transient overvoltage clamping without failure |
| Thermal Resistance | 45 °C/W junction-to-lead - enables accurate thermal design with standard lead length |
| Operating Temp | –65 °C to +150 °C - suitable for industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by color band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to lower-potential node; reverse-biased operation requires cathode at higher potential |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; supplies regulated 33 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N47xxAP registration | Guarantees mechanical and electrical compatibility with legacy 1N47xx designs |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating and no lead exemption required |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and floor-life constraints for SMT-compatible handling |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020 without parameter shift |
| Plastic P-suffix construction | Reduces thermal resistance vs. glass-body G-suffix variants, improving power handling |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in UC384x-based flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference providing stable 33 V threshold for TL431 shunt regulator biasing. Use Value: Maintains ±1.5% output regulation across –40 °C to +85 °C due to tight 5% VZ tolerance and low ZZT. | Use Scenario: Supplies excitation voltage to 350 Ω strain gauge bridges in factory-floor load cells. IC Role / Device Role / Timing Role: Precision voltage reference stabilizing bridge bias against supply ripple and temperature drift. Use Value: Enables 0.05% full-scale linearity by limiting reference drift to <0.01%/°C via specified tempco curve. |
| Overvoltage Clamp Protection | Microcontroller Reset Circuit |
Use Scenario: Clamps 48 V DC bus transients to protect downstream 3.3 V logic rails in motor drive inverters. IC Role / Device Role / Timing Role: Transient voltage suppressor absorbing 1000 mA surge pulses without degradation. Use Value: Prevents latch-up in adjacent ICs by limiting clamped voltage to 36.3 V (VZ + 10%) during 1/120 s surges. | Use Scenario: Generates clean reset signal for ARM Cortex-M4 microcontrollers during brown-out conditions. IC Role / Device Role / Timing Role: Threshold detector holding reset active until 33 V rail stabilizes post-power-on. Use Value: Ensures deterministic boot sequence with <1 µA leakage preserving capacitor hold-up time >200 ms. |
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 "e3" RoHS suffix; Sn/Pb plating only; same VZ, IZT, ZZT, and package | Not compliant with EU RoHS Directive 2011/65/EU; requires lead exemption documentation | Select when legacy Sn/Pb assembly is mandated and environmental compliance is not required |
| MMSZ4708T1G | Surface-mount SOD-123 package; 33 V ±5%; 500 mW rating; ZZT = 50 Ω at 5 mA | Lower power rating limits use to sub-500 mW regulation; smaller footprint but higher thermal resistance | Select for space-constrained PCBs where 1 W dissipation is not needed and reflow compatibility is prioritized |
Compared with 1N4752A and MMSZ4708T1G, the 1N4752PE3/TR12 uniquely combines full 1 W DO-41 power handling, RoHS compliance, and JEDEC-standardized lead form factor-making it optimal for through-hole industrial power supplies requiring long-term component continuity and regulatory alignment.
Availability
1N4752PE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, sensor signal conditioning, overvoltage protection circuits, and microcontroller reset systems requiring stable component supply and long-lifecycle support.
Supply support for 1N4752PE3/TR12 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 1N47xxAP series was designed specifically for general-purpose voltage regulation in cost-sensitive, high-volume power conversion and protection applications where JEDEC standardization and thermal robustness are critical.
FAQ
What is the Zener voltage tolerance of the 1N4752PE3/TR12?
The 1N4752PE3/TR12 has a nominal Zener voltage of 33 V with a tolerance of ±5%, as indicated by the "A" suffix in the base part number. This tolerance is measured at 7.5 mA test current and 25 °C lead temperature, and applies across the full operating temperature range of –65 °C to +150 °C per Microsemi's published specifications.
Does the 1N4752PE3/TR12 require dry packing before PCB assembly?
No, the 1N4752PE3/TR12 does not require dry packing because it is classified as Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B. Its plastic DO-41 package is void-free epoxy meeting UL94V-0, eliminating floor-life limitations and enabling immediate use after opening sealed tape-and-reel packaging.
What is the maximum surge current rating for the 1N4752PE3/TR12?
The 1N4752PE3/TR12 is rated for a maximum non-repetitive reverse surge current of 1000 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating supports transient overvoltage clamping in industrial power rails without parametric shift or catastrophic failure.
How does the thermal resistance of the 1N4752PE3/TR12 compare between lead and ambient mounting?
The 1N4752PE3/TR12 has a junction-to-lead thermal resistance of 45 °C/W at 3/8″ (10 mm) lead length, while junction-to-ambient resistance is 105 °C/W on FR4 board with specified copper pad geometry. This 2.3× difference confirms that lead-mounted heat sinking significantly improves power handling versus board-conducted cooling alone.
Is the 1N4752PE3/TR12 compatible with lead-free reflow soldering processes?
Yes, the 1N4752PE3/TR12 features RoHS-compliant annealed matte-tin plating and is qualified for solder reflow at 260 °C for 10 seconds maximum, fully supporting lead-free assembly. Its plastic package remains stable under these conditions, and no pre-baking is required due to its Level 1 moisture classification.
1N4752PE3/TR12 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)
1N4752PE3/TR12 FAQ
1.How can I place an order for 1N4752PE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4752PE3/TR12 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 1N4752PE3/TR12 reliable?
The price and inventory of 1N4752PE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4752PE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4752PE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4752PE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4752PE3/TR12?
1N4752PE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4752PE3/TR12 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 1N4752PE3/TR12?
For technical support, including 1N4752PE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4752PE3/TR12 requirements.
6.How does Aetrix verify that 1N4752PE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4752PE3/TR12 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 1N4752PE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4752PE3/TR12?
All 1N4752PE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4752PE3/TR12, 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 1N4752PE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4752PE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4752PE3/TR12 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
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SMAZ12-13-F
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