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Microchip Technology 1N4743APE3/TR12
- Part No.:
- 1N4743APE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4743APE3/TR12.pdf
- Description:
- DIODE ZENER 13V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,572
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Product details
Overview
1N4743APE3/TR12 from Microsemi is a 13 V, ±5% tolerance, 1 W axial-lead silicon Zener diode in DO-41 plastic package, rated for 19 mA test current (IZT), 69 Ω dynamic impedance (ZZT), and 344 mA maximum regulator current (IZM) at 50°C. It provides stable voltage regulation in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N4743APE3/TR12 datasheet, 1N4743APE3/TR12 pinout, 1N4743APE3/TR12 application, or 1N4743APE3/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45°C/W junction-to-lead), surge current rating (344 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR12).
Technical Context
This device operates in reverse breakdown to maintain a stable 13 V reference across load variations and temperature shifts from –65°C to +150°C. Its 1 W power rating is derated linearly above 45°C ambient on FR4 board or above 105°C lead temperature at 10 mm from body.
The 1N4743APE3/TR12 exhibits low dynamic impedance (69 Ω @ 19 mA) and sharp knee characteristics verified per JEDEC standards, with forward voltage ≤1.2 V @ 200 mA and reverse leakage ≤5 μA @ 9.9 V. It meets MIL-STD-750 ESD immunity (Method 1020) and IPC/JEDEC J-STD-020B moisture sensitivity Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13 V ±5% at 19 mA - defines precise regulation point for feedback loops and reference rails |
| Power Dissipation | 1.0 W at 25°C - supports continuous regulation in compact PCB layouts with adequate lead length |
| Dynamic Impedance (ZZT) | 69 Ω @ IZT - ensures minimal output voltage variation under changing load current |
| Max Regulator Current (IZM) | 344 mA at TA = 50°C - sets upper limit for safe sustained current in shunt regulation |
| Thermal Resistance | 45°C/W junction-to-lead (3/8″ lead length) - enables accurate thermal design for reliability |
| Reverse Leakage | ≤5 μA @ 9.9 V - guarantees low standby power loss in high-impedance bias networks |
| Forward Voltage | ≤1.2 V @ 200 mA - allows use as clamp or protection diode in forward conduction mode |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by color band; terminals are unmarked anode and banded cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node; reverse-biased during Zener operation |
| Cathode | Banded end | Connected to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin plating per MIL-STD-750 Method 2026 - eliminates lead while maintaining solderability and corrosion resistance |
| Tape-and-reel packaging (TR12) | EIA-296 standard reel - enables automated SMT placement despite axial-lead form factor |
| Moisture Sensitivity Level 1 | No dry pack required per J-STD-020B - reduces handling cost and avoids bake-out before assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in production |
| Plastic encapsulation (P suffix) | Lower thermal resistance vs. glass-body variants - improves power handling in thermally constrained designs |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Zener reference element providing fixed 13 V reference for error amplifier input. Use Value: Maintains ±5% output regulation across line/load transients and temperature drift up to +150°C. |
Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes exceeding 13 V. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess current when rail voltage exceeds 13 V. Use Value: Limits peak voltage to 13 V with 344 mA surge capability, preventing latch-up or damage. |
| Voltage Monitor Threshold | Signal Level Translation |
Use Scenario: Detecting undervoltage or overvoltage conditions in battery-powered instrumentation. IC Role / Device Role / Timing Role: Precision threshold element triggering comparator when supply crosses 13 V. Use Value: Enables reliable trip point with 69 Ω dynamic impedance minimizing hysteresis error. |
Use Scenario: Biasing analog front-end stages requiring a stable 13 V offset in sensor signal conditioning. IC Role / Device Role / Timing Role: DC level shifter establishing fixed reference potential for op-amp inputs. Use Value: Delivers low-noise, temperature-stable 13 V reference with ≤5 μA leakage at 9.9 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4743A (non-e3, bulk) | Same electrical specs but Sn/Pb plating and no RoHS compliance; no TR12 tape-and-reel | Suitable only for legacy non-RoHS assemblies; requires manual loading or different feeder setup | Select when RoHS exemption applies and tape-and-reel automation is unnecessary |
| MMSZ4702T1G (ON Semiconductor) | Surface-mount SOD-123 package; 13 V ±5%, 500 mW rating; 30 Ω ZZT @ 5 mA | Lower power and smaller footprint; not drop-in compatible due to package and thermal path differences | Choose for space-constrained PCBs where 1 W dissipation is not required and reflow compatibility is prioritized |
Compared with 1N4743A bulk and MMSZ4702T1G, the 1N4743APE3/TR12 uniquely combines full 1 W power handling, RoHS compliance, tape-and-reel automation support, and proven DO-41 thermal performance-making it optimal for industrial power supplies requiring long-term supply continuity and assembly efficiency.
Availability
1N4743APE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with RoHS compliance and automated assembly support.
Supply support for 1N4743APE3/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 1N4743APE3/TR12 belongs to Microsemi's legacy 1N47xxAP Zener series, engineered for robust voltage regulation in harsh-environment power systems where thermal stability, ESD immunity, and long-term parametric consistency are critical.
FAQ
What is the Zener voltage tolerance for 1N4743APE3/TR12?
The 1N4743APE3/TR12 has a nominal Zener voltage of 13 V with a ±5% tolerance, as confirmed by the "A" suffix in its part number per JEDEC registration. This tolerance applies at 19 mA test current and 25°C lead temperature, ensuring predictable regulation in feedback and reference circuits without requiring post-manufacturing calibration.
Does 1N4743APE3/TR12 support automated assembly?
Yes, the "TR12" suffix indicates EIA-296 standard tape-and-reel packaging, enabling direct integration into pick-and-place machines. The DO-41 axial-lead form factor is compatible with dedicated axial feeders, and the RoHS-compliant matte-tin plating ensures reliable solder wetting during reflow or wave soldering processes.
What is the maximum allowable surge current for 1N4743APE3/TR12?
The 1N4743APE3/TR12 supports a maximum surge current (ISM) of 344 mA, measured using a ½ sine-wave pulse of 1/120 second duration at 25°C ambient. This rating enables reliable transient clamping in power rails subject to short-duration overvoltage events such as load dump or inductive kickback.
How does thermal resistance affect 1N4743APE3/TR12 performance?
The 1N4743APE3/TR12 has a junction-to-lead thermal resistance of 45°C/W at 10 mm lead length. This value directly determines allowable power dissipation: for example, at 105°C lead temperature, it sustains full 1 W; above that, power must be linearly derated. Proper lead length and copper pour design are essential to maintain regulation accuracy and reliability.
Is 1N4743APE3/TR12 suitable for high-humidity environments?
Yes, the 1N4743APE3/TR12 is moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ≤30°C/60% RH without dry packing. Its void-free epoxy body meeting UL94V-0 further ensures long-term insulation integrity and resistance to condensation-induced leakage in humid industrial enclosures.
1N4743APE3/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):
- 13 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 9.9 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)
1N4743APE3/TR12 FAQ
1.How can I place an order for 1N4743APE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4743APE3/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 1N4743APE3/TR12 reliable?
The price and inventory of 1N4743APE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4743APE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4743APE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4743APE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4743APE3/TR12?
1N4743APE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4743APE3/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 1N4743APE3/TR12?
For technical support, including 1N4743APE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4743APE3/TR12 requirements.
6.How does Aetrix verify that 1N4743APE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4743APE3/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 1N4743APE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4743APE3/TR12?
All 1N4743APE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4743APE3/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 1N4743APE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4743APE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4743APE3/TR12 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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Diodes Incorporated
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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