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Microchip Technology 1N4744E3/TR13
- Part No.:
- 1N4744E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4744E3/TR13.pdf
- Description:
- DIODE ZENER 15V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,314
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Product details
Overview
1N4744E3/TR13 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 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 1N4744E3/TR13 datasheet, 1N4744E3/TR13 pinout, 1N4744E3/TR13 application, or 1N4744E3/TR13 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 discrete Zener diode operates in reverse breakdown to maintain a stable 15 V reference across a wide current range (1–304 mA) and temperature span (−65°C to +150°C). Its 14 Ω dynamic impedance at 17 mA ensures low output variation under load transients.
The device uses a void-free thermosetting epoxy case (UL94V-0 rated) with cathode band polarity marking and tin-lead or RoHS-compliant annealed matte-tin terminals solderable per MIL-STD-750 Method 2026. Thermal derating follows a linear curve from 1.0 W at 25°C to zero at 150°C ambient on FR4 board.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V ±5% at 17 mA - defines precise regulation point for feedback loops and reference rails |
| Power Dissipation | 1.0 W at 25°C lead temperature - sets maximum continuous DC power handling before thermal derating |
| Dynamic Impedance (ZZT) | 14 Ω at IZT = 17 mA - determines AC ripple rejection and regulation stability under varying load |
| Max Regulator Current (IZM) | 304 mA at TL = 50°C - establishes peak safe operating current before thermal runaway |
| Reverse Leakage (IR) | 5 µA max at VR = 11.4 V - ensures minimal standby power loss in high-impedance bias networks |
| Thermal Resistance | 45°C/W junction-to-lead (3/8″ lead length) - enables accurate junction temperature estimation for reliability analysis |
| Forward Voltage | 1.2 V max at 200 mA - supports use as clamp or protection diode in forward conduction mode |
Pinout & Package
DO-41 (DO-204AL) axial-leaded plastic package with cathode indicated by 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 | Non-banded end | Connected to lower-potential node in Zener regulation; forward conduction path when biased positively |
| Cathode | Banded end | Connected to higher-potential node during Zener operation; defines regulated output reference point |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin terminal plating meets EU Directive 2011/65/EU and J-STD-609A Class 1 |
| Moisture Sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies SMT handling and storage |
| Low thermal resistance | 45°C/W junction-to-lead enables higher power density vs. glass-body equivalents |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in assembly |
| Tape-and-reel packaging | "TR13" suffix denotes EIA-296 compliant 13-inch reel - supports high-speed pick-and-place placement |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or op-amp-based shunt regulators. IC Role / Device Role / Timing Role: Provides precise 15 V reference to error amplifier input for output voltage setpoint control. Use Value: ±5% VZ tolerance and 14 Ω ZZT ensure <1% output drift under line/load transients in 5–24 V input supplies. | Use Scenario: Clamping transient spikes on 12 V automotive or industrial control bus lines. IC Role / Device Role / Timing Role: Acts as crowbar element to divert surge current above 15 V threshold into ground path. Use Value: 304 mA IZM and 304 mA ISM sustain 100 ms surges without degradation, meeting ISO 7637-2 Pulse 1/2a requirements. |
| Signal Level Shifting | Temperature-Stable Biasing |
Use Scenario: Generating fixed offset voltages for analog sensor interfaces or ADC reference scaling. IC Role / Device Role / Timing Role: Supplies calibrated 15 V bias to op-amp non-inverting inputs or photodiode transimpedance stages. Use Value: Low 14 Ω ZZT minimizes signal-dependent voltage shift, enabling sub-10 mV accuracy in 0–100 kHz bandwidths. | Use Scenario: Establishing stable quiescent current in Class-A amplifier output stages over −40°C to +85°C. IC Role / Device Role / Timing Role: Sets emitter degeneration voltage in BJT bias networks using temperature-compensated Zener characteristics. Use Value: −65°C to +150°C operating range and known tempco (see Figure 3) allow predictable bias point tracking across environmental stress tests. |
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 only; same VZ, ZZT, IZM, package | 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 |
| MMSZ4702T1G | Surface-mount SOD-123 package; 15 V ±5%; 500 mW rating; 20 Ω ZZT at 5 mA | Lower power and different thermal profile; unsuitable for >250 mA continuous loads | Select for space-constrained PCBs where 1 W dissipation is not needed and reflow compatibility is critical |
Compared with 1N4744A and MMSZ4702T1G, the 1N4744E3/TR13 offers full 1 W power handling in an axial-leaded, RoHS-compliant, tape-and-reel format-making it optimal for through-hole industrial power supplies requiring long-term supply continuity and regulatory compliance.
Availability
1N4744E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply, RoHS compliance, and tape-and-reel automation support.
Supply support for 1N4744E3/TR13 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 1N47xx series was designed specifically for robust, cost-effective voltage regulation in harsh-environment power systems where long-term stability, wide temperature operation, and JEDEC-standard interchangeability are essential.
FAQ
What is the Zener voltage tolerance for 1N4744E3/TR13?
The 1N4744E3/TR13 has a nominal Zener voltage of 15 V with a tolerance of ±5%, as confirmed by the "A" suffix in its base part number (1N4744A) and documented in Microsemi's REV C datasheet. This tolerance applies at 25°C lead temperature with 17 mA test current and ensures predictable regulation in feedback and reference circuits.
Does 1N4744E3/TR13 support automated assembly?
Yes, the "TR13" suffix indicates EIA-296 compliant tape-and-reel packaging on a 13-inch reel, enabling compatibility with standard pick-and-place equipment. The DO-41 package's axial leads and matte-tin plating also support both wave and selective soldering processes per MIL-STD-750 Method 2026.
What is the maximum surge current rating for 1N4744E3/TR13?
The 1N4744E3/TR13 has a maximum surge current (ISM) of 304 mA, measured using a ½ sine-wave pulse of 1/120 second duration at 25°C ambient. This rating supports transient suppression in 12 V automotive and industrial bus applications without permanent parameter shift.
How does the thermal resistance of 1N4744E3/TR13 affect PCB layout?
The 1N4744E3/TR13 has a junction-to-lead thermal resistance of 45°C/W at 3/8″ lead length. To maintain 1 W dissipation, leads must be kept ≥10 mm from the body and routed to ≥4 mm² copper pads; exceeding this length or reducing pad area increases junction temperature and accelerates parametric drift.
Is 1N4744E3/TR13 suitable for high-reliability screening?
No-1N4744E3/TR13 is a commercial-grade part. For high-reliability applications, Microsemi offers screened versions such as JAN1N4744A (MIL-PRF-19500/515) with extended testing; these require prefix additions (e.g., "MQ") and are not interchangeable with the "E3/TR13" variant without qualification.
1N4744E3/TR13 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)
1N4744E3/TR13 FAQ
1.How can I place an order for 1N4744E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4744E3/TR13 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 1N4744E3/TR13 reliable?
The price and inventory of 1N4744E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4744E3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N4744E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4744E3/TR13 transactions.
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4.How is shipping managed for 1N4744E3/TR13?
1N4744E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4744E3/TR13 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 1N4744E3/TR13?
For technical support, including 1N4744E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4744E3/TR13 requirements.
6.How does Aetrix verify that 1N4744E3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N4744E3/TR13 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 1N4744E3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N4744E3/TR13?
All 1N4744E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4744E3/TR13, 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 1N4744E3/TR13 part is unused and in its original packaging.
Return procedure for 1N4744E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4744E3/TR13 Tags
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Diodes Incorporated
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