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Microchip Technology 1N4744CP/TR8
- Part No.:
- 1N4744CP/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4744CP/TR8.pdf
- Description:
- DIODE ZENER 15V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,263
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Product details
Overview
1N4744CP/TR8 from Microsemi is a 15 V, 1 W axial-lead Zener diode in DO-41 plastic package with ±5% voltage tolerance, 14 Ω dynamic impedance at 17 mA test current, and 0.25 A maximum regulator current at 50°C. It provides stable voltage regulation in power supply reference and overvoltage protection circuits across industrial temperature range.
For engineers reviewing the 1N4744CP/TR8 datasheet, 1N4744CP/TR8 pinout, 1N4744CP/TR8 application, or 1N4744CP/TR8 equivalent, key selection factors include its 15 V nominal Zener voltage, 17 mA test current, 14 Ω dynamic impedance, -65°C to +150°C operating temperature, and DO-41 mechanical compatibility with standard through-hole PCB layouts.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 15 V reference across load variations and temperature shifts. Its 14 Ω dynamic impedance ensures low output voltage variation under changing current conditions, while the 0.25 A maximum regulator current supports moderate-power shunt regulation tasks.
The device uses silicon PN junction technology with void-free thermosetting epoxy encapsulation (UL94V-0), cathode band polarity marking, and tin-lead or RoHS-compliant matte-tin plating. Thermal resistance is 45°C/W junction-to-lead at 10 mm lead length, enabling reliable operation up to 150°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V ±5% at 17 mA - defines precise regulation point for reference circuits |
| Power Dissipation | 1.0 W at 25°C - sets maximum continuous thermal load on PCB layout |
| Dynamic Impedance (ZZT) | 14 Ω at 17 mA - determines output voltage stability under current transients |
| Max Regulator Current (IZM) | 0.25 A at 50°C - limits usable shunt current before thermal derating |
| Operating Temperature | -65°C to +150°C - enables deployment in harsh industrial and automotive environments |
| Forward Voltage | ≤1.2 V at 200 mA - confirms low-loss conduction in forward bias during fault conditions |
| Reverse Leakage | ≤5 μA at 11.4 V - ensures minimal standby power loss below regulation threshold |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead 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 | Non-banded lead | Connected to lower-potential node; conducts forward current when biased positively relative to cathode |
| Cathode | Banded lead | Connected to higher-potential node; reverse-biased to achieve 15 V Zener regulation |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Fully compliant with JEDEC 1N4744A specification, ensuring cross-manufacturer interchangeability |
| Plastic P-suffix construction | Lower thermal resistance vs. glass-body variants, improving power handling in compact layouts |
| MIL-STD-750 ESD immunity | Nonsensitive to electrostatic discharge per Method 1020 - reduces handling precautions in assembly |
| Moisture Sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies storage and SMT reflow prep |
| Tape-and-reel packaging | TR8 suffix indicates EIA-296 standard tape-and-reel - enables automated pick-and-place placement |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or op-amp reference nodes. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 15 V reference point independent of input ripple. Use Value: Maintains ±5% regulation accuracy over -65°C to +150°C, reducing need for trimming components. | Use Scenario: Clamping transient surges on 12–15 V DC rails in automotive control modules. IC Role / Device Role / Timing Role: Reverse-biased crowbar element that conducts above 15 V to divert excess energy. Use Value: Withstands 0.25 A continuous regulator current and 304 mA surge current, protecting downstream ICs. |
| Signal Level Shifting | Current Source Biasing |
Use Scenario: Generating stable bias voltages for analog sensor interfaces in industrial PLC I/O modules. IC Role / Device Role / Timing Role: Zener-based voltage source driving high-impedance inputs with minimal drift. Use Value: 14 Ω dynamic impedance ensures <15 mV output shift per 1 mA load change, improving ADC accuracy. | Use Scenario: Setting constant current for LED drivers or transistor bias networks in lighting controls. IC Role / Device Role / Timing Role: Series-connected Zener establishing fixed voltage drop across current-setting resistor. Use Value: 15 V rating allows use with common 24 V supply rails while maintaining tight tolerance and thermal stability. |
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 TR8 tape-and-reel packaging; bulk or ammo pack only | Lacks automated assembly support; requires manual or vibratory feeding | Select 1N4744CP/TR8 for SMT line integration; choose 1N4744A for prototyping or low-volume hand assembly |
| BZX55C15 | 0.5 W power rating, 15 V ±5%, DO-35 package, higher ZZT (20 Ω) | Lower power handling and larger dynamic impedance limit use in higher-current regulation | Use BZX55C15 where space constraints favor smaller DO-35 or power dissipation is ≤0.5 W |
Compared with 1N4744A and BZX55C15, the 1N4744CP/TR8 delivers full 1 W power capability in DO-41 with optimized thermal resistance and factory tape-and-reel delivery-making it preferred for production-scale 15 V shunt regulation where reliability, current capacity, and assembly efficiency are critical.
Availability
1N4744CP/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply with consistent Zener voltage tolerance and thermal performance.
Supply support for 1N4744CP/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N4744CP/TR8 belongs to Microsemi's legacy 1N47xxAP Zener series, designed specifically for robust, cost-effective voltage regulation in mission-critical power and protection circuits where JEDEC compliance and extended temperature operation are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N4744CP/TR8?
The 1N4744CP/TR8 has a nominal Zener voltage of 15 V with a tolerance of ±5%, as confirmed by the "A" suffix in its JEDEC designation and verified in Microsemi's official datasheet revision C. This tolerance applies at 25°C lead temperature with 17 mA test current and ensures predictable regulation across production batches.
Does the 1N4744CP/TR8 support automated assembly?
Yes, the 1N4744CP/TR8 includes the "TR8" suffix indicating EIA-296 standard tape-and-reel packaging with 8 mm carrier tape and 10,000 units per reel. This configuration is fully compatible with high-speed pick-and-place machines used in commercial and industrial PCB assembly lines.
What is the maximum continuous current the 1N4744CP/TR8 can regulate?
The 1N4744CP/TR8 supports a maximum regulator current (IZM) of 0.25 A at 50°C ambient, as specified in Microsemi's electrical characteristics table. At higher temperatures, derating applies per the published power curve-e.g., 0.18 A at 75°C ambient on FR4 board with 4 mm² copper pads.
Is the 1N4744CP/TR8 RoHS compliant?
Yes, the "e3" in the full part number 1N4744CP/TR8 indicates RoHS-compliant matte-tin terminal plating per Microsemi's documentation. The device meets EU RoHS Directive 2011/65/EU and is exempt from lead content restrictions under Annex III for high-melting-temperature solders.
How does the DO-41 package of the 1N4744CP/TR8 compare thermally to glass-body variants?
The DO-41 plastic package of the 1N4744CP/TR8 offers 45°C/W junction-to-lead thermal resistance at 10 mm lead length-significantly lower than glass-body (G-suffix) equivalents. This improves power dissipation efficiency and reduces thermal stress in high-reliability applications without requiring additional heatsinking.
1N4744CP/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:
- ±2%
- 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)
1N4744CP/TR8 FAQ
1.How can I place an order for 1N4744CP/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4744CP/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 1N4744CP/TR8 reliable?
The price and inventory of 1N4744CP/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4744CP/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4744CP/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4744CP/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4744CP/TR8?
1N4744CP/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4744CP/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 1N4744CP/TR8?
For technical support, including 1N4744CP/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4744CP/TR8 requirements.
6.How does Aetrix verify that 1N4744CP/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4744CP/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 1N4744CP/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4744CP/TR8?
All 1N4744CP/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4744CP/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 1N4744CP/TR8 part is unused and in its original packaging.
Return procedure for 1N4744CP/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4744CP/TR8 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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