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Microchip Technology 1N4744PE3/TR8
- Part No.:
- 1N4744PE3/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4744PE3/TR8.pdf
- Description:
- DIODE ZENER 15V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,848
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Product details
Overview
1N4744PE3/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 5 μA maximum reverse leakage at 11.4 V. It regulates voltage across industrial power supplies, reference circuits, and overvoltage protection stages where stable 15 V clamping is required.
For engineers reviewing the 1N4744PE3/TR8 datasheet, 1N4744PE3/TR8 pinout, 1N4744PE3/TR8 application, or 1N4744PE3/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 variations from 1 mA to 304 mA. Its 14 Ω dynamic impedance ensures low regulation error under changing current conditions, while the 0.25 mA maximum regulator current at 50 °C reflects derated performance in elevated ambient environments.
The DO-41 package provides flexible axial-lead mounting with 0.7 g mass and UL94V-0 epoxy body. Cathode polarity is marked by a band; operation requires the banded end to be positive relative to the anode during Zener conduction.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V ±5% at 17 mA - defines nominal regulation point with tight enough tolerance for mid-precision references |
| Power Dissipation | 1.0 W at 25 °C lead temperature - sets absolute thermal limit before derating begins |
| Dynamic Impedance (ZZT) | 14 Ω at IZT = 17 mA - determines output voltage variation per mA of load current change |
| Reverse Leakage Current | 5 μA max at VR = 11.4 V - confirms low standby power loss below knee voltage |
| Surge Current (ISM) | 304 mA peak - supports transient overvoltage absorption without failure |
| Thermal Resistance | 45 °C/W junction-to-lead (3/8″ lead length) - enables thermal design using lead as heatsink |
| Operating Temperature | –65 °C to +150 °C - suitable for extended industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by a single color 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 during regulation; carries full Zener current |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input; maintains 15 V above anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxAP series | Ensures cross-manufacturer compatibility and standardized test conditions per industry specification |
| RoHS-compliant "e3" suffix | Matte-tin plating meets EU Directive 2011/65/EU without lead or hazardous substances |
| Moisture sensitivity Level 1 | No dry pack required prior to PCB assembly - reduces handling cost and process steps |
| Nonsensitive to ESD | Withstands >4 kV HBM per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in production |
| Tape-and-reel packaging ("TR8") | Standard EIA-296 compliant reel format - enables high-speed pick-and-place placement |
Applications
| Industrial Power Supply Regulation | Microcontroller Reference Voltage |
|---|---|
Use Scenario: Stabilizing +15 V rail in analog front-end stages of programmable logic controllers. IC Role / Device Role / Timing Role: Voltage clamp and reference source for op-amp biasing and ADC reference buffers. Use Value: Maintains 15 V ±0.75 V across 1–100 mA load range, enabling <0.5% reference drift in 12-bit measurement systems. | Use Scenario: Providing stable reset threshold for 3.3 V microcontrollers operating from switched-mode supplies. IC Role / Device Role / Timing Role: Zener-based reset supervisor input conditioning and brown-out detection reference. Use Value: Delivers repeatable 11.4 V trigger point at 5 μA leakage, ensuring deterministic reset timing independent of supply ripple. |
| Overvoltage Protection Clamp | Signal-Level Translation Interface |
Use Scenario: Protecting RS-485 transceiver inputs against 24 V bus faults in factory automation networks. IC Role / Device Role / Timing Role: Bidirectional transient voltage suppressor clamping line voltage to 15 V. Use Value: Absorbs 304 mA surge pulses without degradation, limiting fault energy to safe levels for downstream ICs. | Use Scenario: Level-shifting 5 V logic signals to 15 V analog control lines in motor drive gate driver circuits. IC Role / Device Role / Timing Role: Passive voltage translation element using forward conduction and Zener breakdown thresholds. Use Value: Enables bidirectional signal mapping with <1.2 V forward drop and precise 15 V reverse clamp, eliminating active level shifter ICs. |
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 RoHS Directive 2011/65/EU; unsuitable for new EU-market designs | Select 1N4744PE3/TR8 for RoHS-compliant production; use 1N4744A only for legacy repair or non-RoHS programs |
| MMBZ5245BS-7-F | SOT-23 surface-mount package; 15 V ±5%; 225 mW power rating; 15 Ω ZZT | Limited to low-power signal-level regulation; not suitable for >225 mW continuous dissipation | Choose MMBZ5245BS-7-F only for space-constrained PCBs where 1 W dissipation is unnecessary |
Compared with 1N4744A and MMBZ5245BS-7-F, the 1N4744PE3/TR8 uniquely combines full 1 W power handling, RoHS compliance, axial-lead manufacturability, and JEDEC-standardized test conditions-making it optimal for industrial power regulation where reliability and regulatory alignment are mandatory.
Availability
1N4744PE3/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, microcontroller reference circuits, overvoltage protection stages, and signal-level translation interfaces requiring stable component supply and long-term lifecycle support.
Supply support for 1N4744PE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP Zener series was designed specifically for robust, standardized voltage regulation in harsh-environment power systems-emphasizing JEDEC registration, wide temperature operation, and military-grade screening options.
FAQ
What is the Zener voltage tolerance of the 1N4744PE3/TR8?
The 1N4744PE3/TR8 has a nominal Zener voltage of 15 V with a ±5% tolerance, as indicated by the "A" suffix in its base part number. This means the actual measured VZ falls between 14.25 V and 15.75 V when tested at 17 mA and 25 °C lead temperature. The tolerance is guaranteed per JEDEC standard and applies across the full operating temperature range.
Does the 1N4744PE3/TR8 require dry packing before reflow soldering?
No, the 1N4744PE3/TR8 does not require dry packing before reflow soldering. It is moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ≤30 °C/60% RH without baking. This eliminates pre-reflow bake cycles and simplifies manufacturing flow for high-volume PCB assembly.
What is the maximum steady-state current the 1N4744PE3/TR8 can regulate continuously?
The 1N4744PE3/TR8 can regulate up to 91 mA continuously at 25 °C lead temperature, calculated from P = VZ × IZ → IZ = 1.0 W / 15 V ≈ 66.7 mA, but the datasheet specifies 91 mA as the maximum regulator current (IZM) at TL = 25 °C. Derating applies above 25 °C, dropping to 0.25 mA at 50 °C ambient on FR4 board.
How is polarity marked on the 1N4744PE3/TR8?
The 1N4744PE3/TR8 uses a single color band to mark the cathode terminal. During Zener regulation, the banded end must be held at a higher potential than the unbanded (anode) end. Forward conduction occurs when the anode is ~1.2 V more positive than the cathode, per the datasheet's VF specification at 200 mA.
Is the 1N4744PE3/TR8 suitable for automotive under-hood applications?
Yes, the 1N4744PE3/TR8 is suitable for automotive under-hood applications due to its –65 °C to +150 °C operating and storage temperature range, UL94V-0 flame-retardant epoxy case, and proven reliability in MIL-PRF-19500 screened variants. Its 45 °C/W junction-to-lead thermal resistance also supports thermal management in high-ambient engine compartments when leads are used as heat paths.
1N4744PE3/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:
- ±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/TR8 FAQ
1.How can I place an order for 1N4744PE3/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4744PE3/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 1N4744PE3/TR8 reliable?
The price and inventory of 1N4744PE3/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4744PE3/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4744PE3/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4744PE3/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4744PE3/TR8?
1N4744PE3/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4744PE3/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 1N4744PE3/TR8?
For technical support, including 1N4744PE3/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4744PE3/TR8 requirements.
6.How does Aetrix verify that 1N4744PE3/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4744PE3/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 1N4744PE3/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4744PE3/TR8?
All 1N4744PE3/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4744PE3/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 1N4744PE3/TR8 part is unused and in its original packaging.
Return procedure for 1N4744PE3/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4744PE3/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
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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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