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Microchip Technology 1N4744PE3/TR12
- Part No.:
- 1N4744PE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4744PE3/TR12.pdf
- Description:
- DIODE ZENER 15V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,972
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Product details
Overview
1N4744PE3/TR12 from Microsemi is a 15 V, 1 W plastic-encapsulated Zener diode with ±5% voltage tolerance, 14 Ω dynamic impedance at 17 mA test current, and 5 μA maximum reverse leakage at 11.4 V. It regulates voltage in power supply feedback loops, reference circuits, and overvoltage protection paths across industrial and embedded systems.
For engineers reviewing the 1N4744PE3/TR12 datasheet, 1N4744PE3/TR12 pinout, 1N4744PE3/TR12 application, or 1N4744PE3/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45 °C/W junction-to-lead), surge current rating (304 mA), RoHS-compliant matte-tin plating, and DO-41 axial-leaded package compatibility with manual and wave soldering processes.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable DC voltage under varying load and temperature conditions. Its 15 V nominal Zener voltage is specified at 17 mA test current (IZT) with 14 Ω dynamic impedance (ZZT), ensuring predictable regulation slope and low output variation.
The device features a moisture sensitivity level (MSL) 1 rating per IPC/JEDEC J-STD-020B, eliminating dry-pack requirements, and supports operation from –65 °C to +150 °C. Its 1.0 W steady-state power dissipation is rated at TL < 105 °C (3/8″ lead length) or TA < 45 °C on FR4 board with defined copper pad geometry.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V ±5% at IZT = 17 mA - defines regulated output voltage in feedback and clamp circuits |
| Power Dissipation | 1.0 W at TL < 105 °C - sets maximum continuous thermal load without derating |
| Dynamic Impedance | 14 Ω at IZT = 17 mA - determines output voltage change per mA of load current shift |
| Reverse Leakage | 5 μA max at VR = 11.4 V - ensures minimal quiescent current in standby regulation |
| Surge Current (ISM) | 304 mA (½-sine, 1/120 s) - defines transient overvoltage handling capability |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design using lead length as heatsink path |
| Forward Voltage | 1.2 V max at IF = 200 mA - relevant for polarity-check or forward-bias protection use cases |
Pinout & Package
Package: DO-41 (DO-204AL), axial-leaded plastic molded case with cathode band marking. Terminals are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Non-banded end | Connected to lower-potential node in Zener regulation; forward conduction path |
| Cathode | Banded end | Connected to higher-potential node; reverse-biased terminal where Zener breakdown occurs |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxAP series | Ensures cross-manufacturer interchangeability and standardized test conditions |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating, no lead exemption required |
| MSL Level 1 rating | Enables direct placement without baking or dry-pack, reducing assembly overhead |
| Low thermal resistance (45 °C/W) | Supports higher power density than glass-body equivalents (e.g., 1N4744G) in same footprint |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in production |
Applications
| Power Supply Feedback Regulation | Voltage Reference for ADC/DAC |
|---|---|
Use Scenario: Stabilizing output voltage in linear regulator feedback networks or switching converter error amplifiers. IC Role / Device Role / Timing Role: Zener diode provides precise 15 V reference to op-amp or error amplifier input. Use Value: Maintains ±5% output accuracy across –65 °C to +150 °C and 1–300 mA load range. | Use Scenario: Generating stable analog reference for 10–12-bit data converters in sensor signal chains. IC Role / Device Role / Timing Role: Serves as low-cost, low-drift voltage reference node for precision measurement front-ends. Use Value: Delivers 14 Ω dynamic impedance and 5 μA leakage, minimizing reference error contribution. |
| Overvoltage Clamp Protection | ESD-Safe Signal Conditioning |
Use Scenario: Limiting transient voltage spikes on microcontroller I/O lines or sensor inputs. IC Role / Device Role / Timing Role: Shunts excess energy above 15 V to ground during surges up to 304 mA peak. Use Value: Absorbs ½-sine 1/120 s transients without degradation, validated per JEDEC test conditions. | Use Scenario: Biasing and protecting analog front-end amplifiers in industrial fieldbus nodes. IC Role / Device Role / Timing Role: Provides clamping reference while meeting MIL-STD-750 ESD immunity requirements. Use Value: Eliminates external ESD handling protocols due to inherent nonsensitivity per Method 1020. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | No "e3" RoHS suffix; Sn/Pb plating; same electrical specs and DO-41 package | Not compliant with EU RoHS Directive 2011/65/EU; requires lead exemption documentation | Select when legacy Sn/Pb assembly or non-RoHS environments apply |
| MMSZ4705ET1G | Surface-mount SOD-123 package; 15 V ±5%; 500 mW rating; 20 Ω ZZT @ 5 mA | Limited to lower-power applications; unsuitable for 1 W continuous dissipation | Select only for space-constrained PCBs where thermal budget allows derated operation |
Compared with 1N4744A and MMSZ4705ET1G, the 1N4744PE3/TR12 uniquely combines full 1 W power handling, RoHS compliance, MSL Level 1, and axial-leaded DO-41 form factor-making it optimal for through-hole industrial power supplies requiring long-term supply continuity and regulatory alignment.
Availability
1N4744PE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, sensor reference circuits, and overvoltage protection designs requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N4744PE3/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, RF, and discrete components for aerospace, defense, and industrial markets.
The 1N47xxAP Zener series was designed for robust voltage regulation in harsh-environment power systems, emphasizing thermal stability, ESD resilience, and JEDEC-standardized interchangeability.
FAQ
What is the Zener voltage tolerance of the 1N4744PE3/TR12?
The 1N4744PE3/TR12 has a nominal Zener voltage of 15 V with a tolerance of ±5%, as indicated by the "A" suffix in its JEDEC designation. This tolerance is measured at 17 mA test current and 25 °C lead temperature, and applies across the full operating temperature range of –65 °C to +150 °C per Microsemi's published specifications for the 1N4744PE3/TR12.
Does the 1N4744PE3/TR12 require dry packing before reflow?
No, the 1N4744PE3/TR12 does not require dry packing. It is rated Moisture Sensitivity Level (MSL) 1 per IPC/JEDEC J-STD-020B, meaning it can be stored and processed indefinitely at ambient conditions without baking or desiccant packaging-unlike higher-MSL surface-mount devices.
What is the maximum surge current rating for the 1N4744PE3/TR12?
The 1N4744PE3/TR12 has a maximum surge current (ISM) rating of 304 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This value is specified in Microsemi's official datasheet and reflects the device's ability to absorb short-duration overvoltage transients without failure.
Is the 1N4744PE3/TR12 compatible with lead-free soldering processes?
Yes, the 1N4744PE3/TR12 is RoHS-compliant with an "e3" suffix, indicating annealed matte-tin plating qualified for lead-free soldering. It supports peak solder temperatures up to 260 °C for 10 seconds, meeting industry-standard reflow and wave soldering profiles without degradation.
How does the thermal resistance of the 1N4744PE3/TR12 compare to glass-body variants?
The 1N4744PE3/TR12 has a junction-to-lead thermal resistance of 45 °C/W at 3/8″ (10 mm) lead length, which is lower than equivalent glass-body versions (e.g., 1N4744G). This improved thermal performance results from the plastic encapsulation's superior heat transfer to leads, enabling higher sustained power dissipation in the same mechanical footprint.
1N4744PE3/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):
- 15 V
- Tolerance:
- ±10%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 11.4 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)
1N4744PE3/TR12 FAQ
1.How can I place an order for 1N4744PE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4744PE3/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 1N4744PE3/TR12 reliable?
The price and inventory of 1N4744PE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4744PE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4744PE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4744PE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4744PE3/TR12?
1N4744PE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4744PE3/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 1N4744PE3/TR12?
For technical support, including 1N4744PE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4744PE3/TR12 requirements.
6.How does Aetrix verify that 1N4744PE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4744PE3/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 1N4744PE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4744PE3/TR12?
All 1N4744PE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4744PE3/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 1N4744PE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4744PE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4744PE3/TR12 Tags
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