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Microchip Technology 1N4747APE3/TR8
- Part No.:
- 1N4747APE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4747APE3/TR8.pdf
- Description:
- DIODE ZENER 20V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,166
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Product details
Overview
1N4747APE3/TR8 from Microsemi is a 20 V, 1 W plastic-encapsulated Zener diode with ±5% voltage tolerance, 22 Ω dynamic impedance at 12.5 mA test current, and 225 mA maximum regulator current at 50°C. It operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in DC power supplies and analog signal conditioning circuits.
For engineers reviewing the 1N4747APE3/TR8 datasheet, 1N4747APE3/TR8 pinout, 1N4747APE3/TR8 application, or 1N4747APE3/TR8 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45°C/W junction-to-lead), surge current rating (225 mA), RoHS-compliant matte-tin plating, and DO-41 axial-leaded packaging suitable for through-hole PCB assembly.
Technical Context
This device functions as a reverse-biased voltage regulator with sharp breakdown knee, specified at 12.5 mA test current (IZT) and 15.2 V test voltage (VR). Its 22 Ω dynamic impedance ensures stable regulation under varying load currents, while its 0.25 A maximum surge current supports transient suppression in low-energy clamping applications.
The 1N4747APE3/TR8 exhibits a positive temperature coefficient above ~5 V, typical for 20 V Zeners, and is rated for 1.0 W steady-state dissipation at lead temperature <105°C (3/8″ from body) or ambient <45°C on FR4 board. Moisture sensitivity is Level 1 per J-STD-020B-no dry pack required.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±5% at IZT = 12.5 mA - defines nominal regulation point with tight production control |
| Power Dissipation | 1.0 W at TL < 105°C - sets maximum continuous thermal load on lead-mounted layout |
| Dynamic Impedance (ZZT) | 22 Ω at IZT = 12.5 mA - determines output voltage variation under load current changes |
| Max Regulator Current (IZM) | 225 mA at TA = 50°C - limits safe DC current for sustained regulation without thermal runaway |
| Reverse Leakage (IR) | 5 μA max at VR = 15.2 V - ensures minimal quiescent current in standby bias networks |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design using lead length as heatsink path |
| Operating Temperature | –65°C to +150°C - supports industrial and automotive under-hood environments |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded plastic molded case with cathode band marking; RoHS-compliant matte-tin plated leads solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; reverse-biased during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Banded end; connected to higher-potential rail; delivers stable 20 V when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N47xxAP registration | Industry-standard footprint and electrical behavior compatible with legacy designs and PCB footprints |
| RoHS-compliant "e3" suffix | Lead-free matte-tin plating meets EU Directive 2011/65/EU and JEDEC J-STD-609A Class 3 |
| Tape-and-reel "TR8" packaging | Standard EIA-296 compliant carrier for automated through-hole insertion equipment |
| Level 1 moisture sensitivity | No dry-pack or baking required before assembly-reduces manufacturing overhead and handling risk |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020-enables handling without special static controls |
Applications
| DC Power Supply Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing reference voltage for linear regulators or op-amp feedback networks in 24 V industrial power rails. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and define precise 20 V reference potential. Use Value: Delivers ±5% regulation accuracy and 22 Ω dynamic impedance to maintain <100 mV output deviation across 5–200 mA load range. | Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes induced by relay coil flyback or ESD events. IC Role / Device Role / Timing Role: Shunt clamping device that conducts above 20 V to divert excess energy to ground. Use Value: Withstands 225 mA surge current and exhibits fast turn-on due to sharp Zener knee, limiting peak voltage to ≤22 V. |
| Analog Signal Level Shifting | Temperature-Stable Bias Network |
Use Scenario: Establishing fixed bias points for transistor amplifiers in audio preamplifier stages requiring low-noise DC offsets. IC Role / Device Role / Timing Role: Precision voltage reference element setting emitter or gate bias voltage in discrete amplifier topologies. Use Value: Low 22 Ω dynamic impedance minimizes signal-dependent voltage shift, preserving gain linearity across frequency. | Use Scenario: Generating stable bias voltages for sensor front-end circuits operating across –40°C to +85°C ambient ranges. IC Role / Device Role / Timing Role: Temperature-compensated reference source leveraging inherent positive TC of 20 V Zener for improved stability. Use Value: Operates reliably from –65°C to +150°C with defined thermal resistance path, enabling predictable drift modeling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4747A | No "e3" RoHS suffix; Sn/Pb terminations; same VZ, ZZT, IZM | Not compliant with RoHS Directive; requires Pb-containing solder process | Select only for legacy Pb-based assembly lines where RoHS exemption applies |
| MMSZ4704T1G | Surface-mount SOD-123 package; 20 V ±5%; 500 mW rating; 30 Ω ZZT | Lower power rating and different thermal profile; unsuitable for 1 W continuous loads | Choose for space-constrained PCBs where 500 mW dissipation suffices and reflow compatibility is required |
Compared with 1N4747A and MMSZ4704T1G, the 1N4747APE3/TR8 provides full 1 W dissipation in a RoHS-compliant, tape-and-reel ready DO-41 package-making it optimal for high-reliability through-hole power regulation where thermal margin and compliance are critical.
Availability
1N4747APE3/TR8 is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection clamping, and analog signal level shifting requiring stable component supply and long-term obsolescence management.
Supply support for 1N4747APE3/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, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed for robust, standardized Zener regulation in mission-critical power and protection circuits-emphasizing JEDEC compatibility, wide temperature operation, and moisture-insensitive packaging.
FAQ
What is the Zener voltage tolerance of the 1N4747APE3/TR8?
The 1N4747APE3/TR8 has a nominal Zener voltage of 20 V with a tolerance of ±5%, as indicated by the "A" suffix in the part number per JEDEC standard. This tolerance is verified at 12.5 mA test current and 25°C lead temperature, ensuring consistent regulation performance across production lots.
Does the 1N4747APE3/TR8 require dry packing before PCB assembly?
No, the 1N4747APE3/TR8 is moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it does not absorb sufficient moisture to cause popcorning during reflow or wave soldering. No dry pack or baking is required prior to assembly-reducing handling steps and process risk.
What is the maximum continuous power dissipation for the 1N4747APE3/TR8?
The 1N4747APE3/TR8 is rated for 1.0 W steady-state power dissipation at lead temperature (TL) below 105°C with 3/8″ (10 mm) lead length from the body. Derating is required above this temperature, following the curve in Figure 1 of the Microsemi datasheet.
Is the 1N4747APE3/TR8 suitable for surge protection applications?
Yes-the 1N4747APE3/TR8 supports a maximum surge current (ISM) of 225 mA at 25°C using a ½-sine wave pulse (1/120 s duration). It is appropriate for low-energy transient clamping, such as relay flyback suppression or ESD protection in non-high-speed interfaces.
What does the "TR8" suffix indicate in 1N4747APE3/TR8?
The "TR8" suffix denotes tape-and-reel packaging per EIA-296 standard, with 8 mm carrier tape width and component orientation optimized for automated through-hole insertion equipment. This format enables high-volume, repeatable placement without manual handling.
1N4747APE3/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):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 22 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 15.2 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)
1N4747APE3/TR8 FAQ
1.How can I place an order for 1N4747APE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4747APE3/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 1N4747APE3/TR8 reliable?
The price and inventory of 1N4747APE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4747APE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4747APE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4747APE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4747APE3/TR8?
1N4747APE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4747APE3/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 1N4747APE3/TR8?
For technical support, including 1N4747APE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4747APE3/TR8 requirements.
6.How does Aetrix verify that 1N4747APE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4747APE3/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 1N4747APE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4747APE3/TR8?
All 1N4747APE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4747APE3/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 1N4747APE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4747APE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4747APE3/TR8 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
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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
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SMAZ12-13-F
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