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Microchip Technology 1N4747E3/TR13
- Part No.:
- 1N4747E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4747E3/TR13.pdf
- Description:
- DIODE ZENER 20V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,604
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Product details
Overview
1N4747E3/TR13 from Microsemi is a 1.0 W, 20 V ±5% Zener diode in DO-41 plastic package, rated for 12.5 mA test current (IZT), 22 Ω dynamic impedance (ZZT), and 5 μA reverse leakage at 15.2 V (VR). It operates from –65°C to +150°C and regulates voltage in low-power reference and protection circuits.
For engineers reviewing the 1N4747E3/TR13 datasheet, 1N4747E3/TR13 pinout, 1N4747E3/TR13 application, or 1N4747E3/TR13 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45°C/W junction-to-lead), surge current rating (225 mA), RoHS compliance (e3 suffix), and tape-and-reel packaging (TR13).
Technical Context
This axial-lead silicon Zener diode provides precise voltage regulation via controlled reverse-breakdown conduction. Its 20 V nominal Zener voltage is specified at 12.5 mA IZT with ±5% tolerance (A-suffix), and it maintains stable regulation across –65°C to +150°C ambient range.
The device exhibits 22 Ω dynamic impedance at IZT, 0.25 A maximum regulator current (IZM) at TA = 50°C, and 225 mA non-repetitive surge current (ISM) under 1/120 s pulse conditions - enabling robust transient suppression in power supply feedback paths and overvoltage clamping.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±5% at 12.5 mA - defines regulated output voltage in shunt reference designs |
| Power Dissipation | 1.0 W at TL < 105°C (3/8″ lead length) - sets maximum continuous DC power handling |
| Dynamic Impedance (ZZT) | 22 Ω at IZT - determines regulation stiffness and output voltage variation under load changes |
| Reverse Leakage (IR) | 5 μA max at VR = 15.2 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Surge Current (ISM) | 225 mA (½-sine, 1/120 s) - supports transient overvoltage absorption without failure |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design with standard lead-mounting on FR4 PCBs |
| 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 cathode indicated by 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 ground | Connected to circuit ground or lower-potential node during Zener operation |
| Cathode | Zener regulation terminal / voltage reference output | Banded end; connected to unregulated input to maintain 20 V reference at this node |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N47xxA-compliant construction | Ensures mechanical and electrical interchangeability with legacy 1W Zener designs |
| RoHS-compliant "e3" termination | Meets EU Directive 2011/65/EU with annealed matte-tin plating and no lead exemption required |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT reflow compatibility |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands human-body-model discharges without parameter shift or failure |
| Tape-and-reel packaging (TR13) | Enables automated pick-and-place assembly with EIA-296 standard carrier tape |
Applications
| Power Supply Feedback Reference | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Stabilizing output voltage in linear regulators or switching converter feedback loops. IC Role / Device Role / Timing Role: Shunt voltage reference providing precise 20 V threshold for error amplifier comparison. Use Value: Maintains ±5% output accuracy across temperature and line/load variations due to low ZZT (22 Ω) and stable TC. | Use Scenario: Protecting downstream ICs from transient voltage spikes on 24 V rail systems. IC Role / Device Role / Timing Role: Clamping element diverting excess energy when rail exceeds 20 V breakdown threshold. Use Value: Absorbs 225 mA surge pulses without degradation, leveraging 1 W power rating and robust DO-41 thermal path. |
| Low-Power Sensor Biasing | Industrial Signal Conditioning |
Use Scenario: Providing stable excitation voltage for resistive sensors in battery-powered instrumentation. IC Role / Device Role / Timing Role: Low-quiescent-current voltage source delivering 20 V with only 5 μA leakage at 15.2 V. Use Value: Extends battery life while maintaining sensor linearity through tight VZ tolerance and minimal self-heating. | Use Scenario: Level-shifting and voltage limiting in analog front-ends of PLC I/O modules. IC Role / Device Role / Timing Role: Input protection device clamping signals to 20 V before ADC input stages. Use Value: Prevents ADC saturation and latch-up using rugged –65°C to +150°C operating range and MIL-STD-750 qualified terminals. |
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; TR13 tape not standard | Limited to non-RoHS production; requires dry pack per J-STD-020B Level 2 | Select when legacy Pb-based assembly or cost-sensitive non-RoHS programs apply |
| MMSZ4702T1G | Surface-mount SOD-123 package; 20 V ±5%; 500 mW rating; 20 Ω ZZT | Lower power (0.5 W); unsuitable for >500 mW continuous dissipation | Choose for space-constrained PCBs where thermal budget allows reduced power derating |
Compared with 1N4747A and MMSZ4702T1G, the 1N4747E3/TR13 offers full 1 W dissipation in through-hole DO-41, guaranteed RoHS compliance, and tape-and-reel readiness - making it optimal for industrial power supplies requiring long-term component continuity and automated assembly.
Availability
1N4747E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and programmable logic controller (PLC) I/O conditioning requiring stable component supply and long-lifecycle support.
Supply support for 1N4747E3/TR13 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 discrete components for aerospace, defense, and industrial markets.
The 1N47xx series was designed for general-purpose voltage regulation and transient suppression in ruggedized power systems - emphasizing JEDEC compatibility, wide temperature operation, and MIL-qualified reliability screening options.
FAQ
What is the Zener voltage tolerance of the 1N4747E3/TR13?
The 1N4747E3/TR13 has a nominal Zener voltage of 20 V with a ±5% tolerance, confirmed by the "A" suffix in its JEDEC designation and verified in Microsemi's official datasheet revision C (2005). This tolerance applies at 12.5 mA test current and 25°C lead temperature. The 1N4747E3/TR13 meets this specification across its full operating temperature range of –65°C to +150°C.
Does the 1N4747E3/TR13 support automated assembly?
Yes, the 1N4747E3/TR13 is supplied in EIA-296 standard tape-and-reel format (indicated by "TR13" suffix), enabling direct use in high-speed pick-and-place equipment. Its RoHS-compliant matte-tin plating ensures reliable solderability at 260°C for 10 seconds, and its moisture sensitivity level 1 classification eliminates dry-pack requirements prior to reflow.
What is the maximum steady-state power dissipation for the 1N4747E3/TR13?
The 1N4747E3/TR13 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 board with specified copper pad geometry. Derating is required above these temperatures per Figure 1 in the Microsemi datasheet.
How does the thermal resistance of the 1N4747E3/TR13 affect PCB layout?
The 1N4747E3/TR13 has a junction-to-lead thermal resistance of 45°C/W, meaning each watt dissipated raises junction temperature 45°C above lead temperature. To maintain reliability, PCB layout should ensure ≥10 mm lead length from body and avoid excessive copper pour near leads that could trap heat; thermal relief patterns are recommended for solder joints.
Is the 1N4747E3/TR13 suitable for automotive under-hood applications?
Yes, the 1N4747E3/TR13 is rated for –65°C to +150°C operating and storage temperature, exceeding typical automotive under-hood requirements (–40°C to +125°C). Its MIL-STD-750 qualified terminals, ESD immunity (Method 1020), and moisture-insensitive Level 1 packaging make it appropriate for engine control units and body electronics where thermal and environmental stress is high.
1N4747E3/TR13 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:
- ±10%
- 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)
1N4747E3/TR13 FAQ
1.How can I place an order for 1N4747E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4747E3/TR13 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 1N4747E3/TR13 reliable?
The price and inventory of 1N4747E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4747E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N4747E3/TR13?
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4.How is shipping managed for 1N4747E3/TR13?
1N4747E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4747E3/TR13 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 1N4747E3/TR13?
For technical support, including 1N4747E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4747E3/TR13 requirements.
6.How does Aetrix verify that 1N4747E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N4747E3/TR13 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 1N4747E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N4747E3/TR13?
All 1N4747E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4747E3/TR13, 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 1N4747E3/TR13 part is unused and in its original packaging.
Return procedure for 1N4747E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4747E3/TR13 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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Diodes Incorporated
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MM5Z5V1ST1G
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SMAJ4744A-TP
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