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Microchip Technology 1N4747APE3/TR12
- Part No.:
- 1N4747APE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4747APE3/TR12.pdf
- Description:
- DIODE ZENER 20V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:3,323
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Product details
Overview
1N4747APE3/TR12 from Microsemi is a 20 V, 1 W axial-lead Zener diode in DO-41 plastic package with ±5% voltage tolerance, 22 Ω dynamic impedance at 12.5 mA test current, and 225 mA maximum regulator current at 50°C. It provides stable voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation for industrial sensor interfaces.
For engineers reviewing the 1N4747APE3/TR12 datasheet, 1N4747APE3/TR12 pinout, 1N4747APE3/TR12 application, or 1N4747APE3/TR12 equivalent, key selection criteria include Zener voltage (20 V), power rating (1 W), thermal resistance (45 °C/W junction-to-lead), reverse leakage (5 µA at 15.2 V), and RoHS-compliant matte-tin plating.
Technical Context
This device operates in reverse breakdown to maintain a stable 20 V reference across a wide current range (12.5 mA to 225 mA) and temperature span (–65°C to +150°C). Its 22 Ω dynamic impedance ensures low output variation under load transients, while the DO-41 package supports axial mounting with 0.7 g mass and UL94V-0 epoxy body.
The 1N4747APE3/TR12 exhibits a positive temperature coefficient above 5 V, with typical TC of +5.5 mV/°C near 20 V. It is rated for 260°C soldering (10 s max) and classified IPC/JEDEC J-STD-020B Level 1 for moisture sensitivity-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 (3/8″ lead length) - sets maximum continuous DC power in leaded thermal path |
| Dynamic Impedance (ZZT) | 22 Ω at IZT = 12.5 mA - determines output voltage deviation under small-signal AC load changes |
| Max Regulator Current (IZM) | 225 mA at TA = 50°C - limits usable current range before thermal runaway in PCB-mounted operation |
| Reverse Leakage (IR) | 5 µA max at VR = 15.2 V - ensures minimal quiescent current in standby regulation modes |
| Forward Voltage | 1.2 V max at IF = 200 mA - defines conduction loss when used in series forward-biased configurations |
| Thermal Resistance | 45 °C/W junction-to-lead - enables accurate junction temperature estimation from measured lead temperature |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode band marking; void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plating, 0.7 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node in Zener configuration | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node in Zener configuration | Banded end; held at stable 20 V relative to anode during breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1 W Zener | Fully compliant with JEDEC 1N47xxA standard - ensures cross-manufacturer interchangeability in legacy designs |
| RoHS-compliant "e3" suffix | Matte-tin terminal plating per MIL-STD-750 Method 2026 - eliminates lead content without compromising solderability or reliability |
| Moisture Sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - reduces handling overhead and avoids bake-out delays in SMT assembly prep |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - withstands human-body-model discharges without parameter shift or failure |
| Tape-and-reel packaging | EIA-296 compliant with "TR12" suffix - enables automated pick-and-place insertion for high-volume PCB assembly |
Applications
| Industrial Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Zener reference element providing precise 20 V threshold for TL431-type shunt regulators or discrete op-amp comparators. Use Value: Maintains ±5% output regulation across line/load/temperature with 22 Ω dynamic impedance minimizing loop gain variation. | Use Scenario: Clamping transient surges on 24 V DC input rails in PLC I/O modules exposed to inductive switching noise. IC Role / Device Role / Timing Role: Standby shunt clamp absorbing energy from L/R spikes exceeding 20 V, diverting current away from downstream ICs. Use Value: Withstands 225 mA peak surge current and dissipates up to 1 W continuously without degradation under sustained overvoltage. |
| Temperature-Stable Reference Source | Low-Cost Analog Sensor Biasing |
Use Scenario: Generating fixed bias voltage for precision RTD or thermistor signal conditioning circuits operating from –40°C to +85°C ambient. IC Role / Device Role / Timing Role: Primary voltage reference for instrumentation amplifier gain-setting networks or ADC reference dividers. Use Value: Positive TC of ~+5.5 mV/°C partially compensates for negative TC of silicon sensors, improving overall system drift performance. | Use Scenario: Providing stable excitation voltage to bridge-based pressure or load-cell sensors in HVAC control boards. IC Role / Device Role / Timing Role: Low-noise, low-drift DC bias source replacing more expensive voltage references in cost-sensitive analog front ends. Use Value: Delivers 20 V ±5% with only 5 µA leakage at 15.2 V, minimizing loading error on high-impedance sensor outputs. |
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 plating; same electrical specs and DO-41 package | Not suitable for RoHS-compliant production; requires leaded solder process | Select when legacy leaded assembly is mandated and environmental compliance is not required |
| MMSZ4704T1G | Surface-mount SOD-123 package; 20 V ±5%; 500 mW rating; 30 Ω ZZT | Lower power handling (0.5 W vs. 1 W); unsuitable for high-current clamping or sustained regulation | Choose for space-constrained PCBs where 1 W dissipation is not needed and reflow compatibility is prioritized |
Compared with 1N4747A and MMSZ4704T1G, the 1N4747APE3/TR12 uniquely combines full 1 W power capability, RoHS compliance, tape-and-reel automation support, and JEDEC-standard axial form factor-making it optimal for industrial power supplies requiring robust, compliant, and manufacturable Zener regulation.
Availability
1N4747APE3/TR12 is available at Aetrix Electronics and suitable for industrial power supply feedback, overvoltage protection clamps, and temperature-stable reference source applications requiring stable component supply and long-term lifecycle continuity.
Supply support for 1N4747APE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for general-purpose voltage regulation in cost-sensitive, high-volume industrial systems-balancing JEDEC standardization, thermal robustness, and RoHS readiness without sacrificing 1 W power capability.
FAQ
What is the Zener voltage tolerance for 1N4747APE3/TR12?
The 1N4747APE3/TR12 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 applies at 25°C lead temperature with 12.5 mA test current and is maintained across the full operating temperature range of –65°C to +150°C per Microsemi's published characterization data.
Does 1N4747APE3/TR12 require dry packing before PCB assembly?
No, the 1N4747APE3/TR12 is rated IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1, meaning it does not absorb sufficient moisture during normal factory handling to require dry pack or baking prior to reflow or wave soldering. This eliminates pre-assembly bake cycles and simplifies manufacturing logistics for high-volume production.
What is the maximum steady-state power dissipation for 1N4747APE3/TR12 on a standard FR4 PCB?
When mounted on a standard FR4 PCB (1 oz copper, 4 mm² pads, 1 mm track width, 25 mm length), the 1N4747APE3/TR12 has a thermal resistance of 105°C/W junction-to-ambient and a maximum steady-state power dissipation of 1.0 W only at ambient temperatures below 45°C. Derating is required above this temperature per the published power derating curve in Microsemi's datasheet.
Can 1N4747APE3/TR12 be used in surface-mount designs?
No, the 1N4747APE3/TR12 uses a DO-41 axial-lead package and is not compatible with surface-mount assembly processes. For SMT equivalents, Microsemi offers the SMAJ4747A and MLL4747A in DO-214AC and SOD-80 packages respectively-both rated for 20 V and ±5% tolerance but with lower power ratings than the 1 W 1N4747APE3/TR12.
What does the "TR12" suffix indicate in 1N4747APE3/TR12?
The "TR12" suffix indicates EIA-296 standard tape-and-reel packaging with 12 mm tape width, enabling automated pick-and-place insertion in high-throughput PCB assembly lines. This format is distinct from bulk or ammo-pack options and ensures consistent orientation and spacing for robotic handling without manual intervention.
1N4747APE3/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):
- 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/TR12 FAQ
1.How can I place an order for 1N4747APE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4747APE3/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 1N4747APE3/TR12 reliable?
The price and inventory of 1N4747APE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4747APE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4747APE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4747APE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4747APE3/TR12?
1N4747APE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4747APE3/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 1N4747APE3/TR12?
For technical support, including 1N4747APE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4747APE3/TR12 requirements.
6.How does Aetrix verify that 1N4747APE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4747APE3/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 1N4747APE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4747APE3/TR12?
All 1N4747APE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4747APE3/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 1N4747APE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4747APE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4747APE3/TR12 Tags
-
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
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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