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Microchip Technology 1N4744APE3/TR8
- Part No.:
- 1N4744APE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4744APE3/TR8.pdf
- Description:
- DIODE ZENER 15V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,658
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Product details
Overview
1N4744APE3/TR8 from Microsemi is a 15 V, 1 W silicon Zener diode in DO-41 plastic package with ±5% voltage tolerance, 14 Ω dynamic impedance at 17 mA test current, and 5 μA maximum reverse leakage at 11.4 V. It provides stable voltage regulation in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N4744APE3/TR8 datasheet, 1N4744APE3/TR8 pinout, 1N4744APE3/TR8 application, or 1N4744APE3/TR8 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 tape-and-reel packaging for automated assembly.
Technical Context
This device operates in reverse breakdown to maintain a stable 15 V reference across load and line variations. Its 17 mA Zener test current and sharp knee impedance (61 Ω at 0.25 mA) ensure predictable regulation onset and low dynamic impedance under nominal bias.
Designed for axial-lead mounting, it features moisture sensitivity Level 1 per J-STD-020B (no dry pack required), UL94V-0 epoxy body, and cathode band polarity marking. Thermal performance is specified at 3/8″ lead length (45 °C/W) and on FR4 board (105 °C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V ±5% at 17 mA - defines precise regulation point for feedback networks and reference rails |
| Power Dissipation | 1.0 W at TL < 105 °C - sets maximum continuous steady-state power handling capability |
| Dynamic Impedance (ZZT) | 14 Ω at IZT = 17 mA - determines output voltage variation under changing load current |
| Reverse Leakage (IR) | 5 μA max at VR = 11.4 V - ensures minimal standby current in high-impedance bias networks |
| Surge Current (ISM) | 304 mA (½-sine, 1/120 s) - supports transient overvoltage clamping without failure |
| Thermal Resistance | 45 °C/W junction-to-lead (3/8″ lead length) - enables thermal design of heatsinking and PCB layout |
| Operating Temperature | –65 °C to +150 °C - suitable for extended industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by colored 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 when used in reverse-biased regulation |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input; delivers stable 15 V to load or feedback network |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC 1N47xxAP registration | Industry-standard footprint and electrical compatibility with legacy 1N47xx designs |
| RoHS-compliant "e3" suffix | Matte-tin plating meets EU RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 3 |
| Tape-and-reel "TR8" packaging | EIA-296 compliant 8 mm carrier tape for high-speed SMT placement despite axial form factor |
| Moisture Sensitivity Level 1 | No dry-pack or baking required before assembly - reduces manufacturing overhead and floor-life constraints |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in production |
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: Provides precise 15 V reference to error amplifier input or base bias network. Use Value: Maintains ±5% output regulation across 10–100 mA load current and –40 °C to +85 °C ambient. | Use Scenario: Protecting downstream logic or analog circuitry from transient voltage spikes on DC rails. IC Role / Device Role / Timing Role: Shunts excess energy to ground when rail exceeds 15 V + dynamic margin. Use Value: Limits peak voltage to ≤16.7 V (VZ + ΔVZ at ISM) during 304 mA surges. |
| Voltage Monitor Threshold | Signal Level Translation |
Use Scenario: Detecting undervoltage or overvoltage conditions in microcontroller supervisory circuits. IC Role / Device Role / Timing Role: Generates logic-level flag via comparator input biased at 15 V reference. Use Value: Enables reliable trip point with <5 μA leakage ensuring minimal threshold drift over time. | Use Scenario: Biasing op-amp inputs or level-shifting sensor outputs to match ADC input ranges. IC Role / Device Role / Timing Role: Establishes fixed 15 V bias point for single-supply signal conditioning stages. Use Value: Delivers stable offset with 14 Ω ZZT minimizing gain error in precision amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A (Microsemi) | No "e3" RoHS suffix; Sn/Pb terminations; same ZZT, VZ, IZM | Not suitable for RoHS-compliant production; requires Pb-containing solder process | Select when legacy Pb-based assembly is mandated and environmental compliance is not required |
| MMBZ5245BS-7-F (Diodes Inc.) | SOT-23 surface-mount package; 15 V ±5%; 500 mW rating; higher ZZT (25 Ω) | Lower power handling and different thermal profile; requires PCB redesign for SMT placement | Select for space-constrained boards where DO-41 footprint is prohibitive and 500 mW suffices |
Compared with 1N4744A (non-RoHS) and MMBZ5245BS-7-F (SMT), the 1N4744APE3/TR8 offers full 1 W dissipation in a RoHS-compliant, tape-and-reel ready axial package-ideal for through-hole power references requiring regulatory compliance and legacy footprint compatibility.
Availability
1N4744APE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with full RoHS compliance and automated assembly support.
Supply support for 1N4744APE3/TR8 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 timing solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for general-purpose voltage regulation in cost-sensitive, high-volume applications where JEDEC-standard form factor, thermal robustness, and long-term stability are critical.
FAQ
What is the Zener voltage tolerance of the 1N4744APE3/TR8?
The 1N4744APE3/TR8 has a nominal Zener voltage of 15 V with a tolerance of ±5%, as indicated by the "A" suffix in the part number. This tolerance is measured at 17 mA test current and 25 °C lead temperature. The 1N4744APE3/TR8 maintains this specification across its rated operating temperature range and is verified per JEDEC registered data.
Does the 1N4744APE3/TR8 require dry packing before reflow soldering?
No, the 1N4744APE3/TR8 does not require dry packing. It is moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored and assembled without baking or humidity-controlled handling. This simplifies manufacturing logistics and eliminates floor-life concerns for the 1N4744APE3/TR8 in high-volume production.
What is the maximum surge current rating for the 1N4744APE3/TR8?
The 1N4744APE3/TR8 has a maximum non-repetitive surge current (ISM) of 304 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating applies to transient overvoltage clamping events and is distinct from its continuous Zener current limit of 76 mA at 15 V.
Can the 1N4744APE3/TR8 be used in surface-mount applications?
The 1N4744APE3/TR8 is an axial-leaded DO-41 device and is not designed for direct surface-mount assembly. However, Microsemi offers surface-mount equivalents such as SMAJ4744A and MLL4744A. For existing 1N4744APE3/TR8 designs, adapter carriers or through-hole reflow processes may be used-but the 1N4744APE3/TR8 itself requires axial mounting.
What does the "TR8" suffix indicate in 1N4744APE3/TR8?
"TR8" indicates EIA-296 standard tape-and-reel packaging with 8 mm carrier tape width, enabling automated pick-and-place handling. This format supports high-throughput assembly while preserving the DO-41 mechanical form factor. The 1N4744APE3/TR8 combines RoHS compliance ("e3"), plastic construction ("P"), and tape-and-reel readiness in a single orderable part number.
1N4744APE3/TR8 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:
- ±5%
- 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)
1N4744APE3/TR8 FAQ
1.How can I place an order for 1N4744APE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4744APE3/TR8 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 1N4744APE3/TR8 reliable?
The price and inventory of 1N4744APE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4744APE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4744APE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4744APE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4744APE3/TR8?
1N4744APE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4744APE3/TR8 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 1N4744APE3/TR8?
For technical support, including 1N4744APE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4744APE3/TR8 requirements.
6.How does Aetrix verify that 1N4744APE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4744APE3/TR8 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 1N4744APE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4744APE3/TR8?
All 1N4744APE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4744APE3/TR8, 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 1N4744APE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4744APE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4744APE3/TR8 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
-
MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
-
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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