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Microchip Technology 1N4747PE3/TR12
- Part No.:
- 1N4747PE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4747PE3/TR12.pdf
- Description:
- DIODE ZENER 20V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,026
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Product details
Overview
1N4747PE3/TR12 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 0.25 A maximum regulator current at 50°C. It operates across –65°C to +150°C and regulates voltage in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4747PE3/TR12 datasheet, 1N4747PE3/TR12 pinout, 1N4747PE3/TR12 application, or 1N4747PE3/TR12 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 package compatibility with standard through-hole assembly.
Technical Context
This device functions as a voltage reference by operating in reverse breakdown with controlled Zener conduction. Its 20 V nominal regulation voltage is specified at 12.5 mA test current (IZT), with dynamic impedance measured at 22 Ω under 10% AC superimposition on IZT per JEDEC standards.
Thermal performance is defined for two mounting conditions: 45°C/W junction-to-lead at 10 mm lead length, and 105°C/W junction-to-ambient on FR4 with 4 mm² copper pads. Forward voltage remains ≤1.2 V at 200 mA, confirming low-conduction-loss capability in bidirectional clamp configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 20 V ±5% at 12.5 mA - defines stable regulation point for feedback networks and reference rails |
| Power Dissipation | 1.0 W at 25°C - sets maximum continuous DC power handling before thermal derating applies |
| Dynamic Impedance (ZZT) | 22 Ω at IZT = 12.5 mA - determines output voltage stability under load current variation |
| Max Regulator Current (IZM) | 0.25 A at TA = 50°C - limits safe steady-state reverse current without exceeding junction temperature |
| Surge Current (ISM) | 225 mA (½-sine, 1/120 s) - supports transient overvoltage clamping in protection circuits |
| Thermal Resistance | 45°C/W junction-to-lead - enables thermal design using lead length as heatsink path |
| Operating Temperature | –65°C to +150°C - ensures reliability in automotive under-hood and industrial control environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by colored band; terminals are non-polarized for mounting but functionally asymmetric (cathode must be biased positive relative to anode for Zener operation).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased current sink terminal | Connected to lower potential node; carries full Zener current during regulation |
| Cathode | Reverse-biased voltage reference terminal | Banded end; held at stable 20 V above anode when reverse current ≥12.5 mA |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant matte-tin plating | Enables lead-free reflow soldering per MIL-STD-750 Method 2026 without intermetallic degradation |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT and THT assembly |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020 without parameter shift or failure |
| Plastic encapsulation (P suffix) | Reduces thermal resistance vs. glass-body variants, improving power handling in compact layouts |
| Tape-and-reel packaging (TR suffix) | Supports automated pick-and-place insertion with EIA-296 compliant carrier tape geometry |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Voltage reference element providing precise 20 V setpoint for error amplifier comparison. Use Value: Maintains ±5% output regulation across line/load transients and temperature drift up to +150°C. | Use Scenario: Clamping induced surges on 24 V DC bus lines in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Shunt protection device diverting excess energy to ground when bus exceeds 20 V. Use Value: Limits transient voltage to ≤20.6 V (max Vz at IZK) while surviving 225 mA surge pulses per IEC 61000-4-5. |
| Signal Level Translation | Temperature-Stable Biasing |
Use Scenario: Generating fixed bias voltage for op-amp input stages in sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Low-noise DC reference source replacing resistive dividers to improve PSRR and drift performance. Use Value: Delivers <22 Ω output impedance and <0.1%/°C tempco below 20 V, reducing offset drift by 3× vs. resistor-based references. | Use Scenario: Setting collector current in high-temperature BJT amplifier stages for aerospace telemetry transmitters. IC Role / Device Role / Timing Role: Stable bias generator compensating for transistor VBE variation across –65°C to +150°C. Use Value: Maintains regulation within ±5% over full military temperature range, enabling predictable gain and bandwidth stability. |
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 "P" (plastic) or "e3" (RoHS) suffix; glass-body construction, Sn/Pb plating | Higher thermal resistance (junction-to-ambient ~125°C/W), not RoHS-compliant | Select only for legacy Sn/Pb assembly or where glass-body moisture resistance is required |
| MMSZ4702T1G | Surface-mount SOD-123 package, 20 V ±5%, 500 mW rating, 30 Ω Zzt | Lower power rating and different thermal profile; requires PCB layout change | Choose for space-constrained designs where 1 W dissipation is not needed and SMT is preferred |
Compared with 1N4747A and MMSZ4702T1G, the 1N4747PE3/TR12 offers superior thermal performance in through-hole applications, guaranteed RoHS compliance, and higher surge current capability-making it optimal for industrial power supplies requiring long-term reliability and regulatory alignment.
Availability
1N4747PE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with full traceability and lifecycle management.
Supply support for 1N4747PE3/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 robust voltage regulation in harsh-environment power systems where long-term stability, wide temperature operation, and MIL-compliant screening options are essential.
FAQ
What is the Zener voltage tolerance for 1N4747PE3/TR12?
The 1N4747PE3/TR12 has a nominal Zener voltage of 20 V with a tolerance of ±5%, as indicated by the "A" suffix in its base part number (1N4747A). This tolerance is verified at 12.5 mA test current and 25°C lead temperature, per JEDEC registration requirements.
Does 1N4747PE3/TR12 support lead-free soldering processes?
Yes, the 1N4747PE3/TR12 features RoHS-compliant annealed matte-tin plating and is qualified for lead-free reflow soldering at 260°C for 10 seconds, meeting MIL-STD-750 Method 2026. The "e3" suffix explicitly denotes this RoHS-compliant termination finish.
What package type is used for 1N4747PE3/TR12?
The 1N4747PE3/TR12 uses the DO-41 (JEDEC DO-204AL) plastic axial-leaded package. Its dimensions, polarity marking (cathode band), and mechanical specifications conform to the standard outlined in Microsemi's datasheet revision C, page 3.
How does thermal resistance differ between lead-mounted and PCB-mounted configurations for 1N4747PE3/TR12?
When mounted with 10 mm lead length from body, 1N4747PE3/TR12 exhibits 45°C/W junction-to-lead thermal resistance. On FR4 board with 4 mm² copper pads, it rises to 105°C/W junction-to-ambient-requiring derating to 0.25 W above 45°C ambient per Figure 1 in the datasheet.
Can 1N4747PE3/TR12 be used in surge protection applications?
Yes, the 1N4747PE3/TR12 supports surge currents up to 225 mA (½-sine wave, 1/120 s duration) at 25°C, making it suitable for clamping transient overvoltages in DC power rails. Its 20 V regulation voltage and 22 Ω dynamic impedance ensure fast, repeatable response without latch-up or parametric shift.
1N4747PE3/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:
- ±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)
1N4747PE3/TR12 FAQ
1.How can I place an order for 1N4747PE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4747PE3/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 1N4747PE3/TR12 reliable?
The price and inventory of 1N4747PE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4747PE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4747PE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4747PE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4747PE3/TR12?
1N4747PE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4747PE3/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 1N4747PE3/TR12?
For technical support, including 1N4747PE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4747PE3/TR12 requirements.
6.How does Aetrix verify that 1N4747PE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4747PE3/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 1N4747PE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4747PE3/TR12?
All 1N4747PE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4747PE3/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 1N4747PE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4747PE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4747PE3/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
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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