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Microchip Technology 1N4744APE3/TR12
- Part No.:
- 1N4744APE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4744APE3/TR12.pdf
- Description:
- DIODE ZENER 15V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,348
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Product details
Overview
1N4744APE3/TR12 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, overvoltage protection, and biasing circuits across industrial temperature range.
For engineers reviewing the 1N4744APE3/TR12 datasheet, 1N4744APE3/TR12 pinout, 1N4744APE3/TR12 application, or 1N4744APE3/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 tape-and-reel packaging for automated assembly.
Technical Context
This device operates in reverse breakdown to maintain a stable 15 V reference across 1.0 mA to 304 mA regulation current. Its 14 Ω dynamic impedance ensures low output variation under load changes, while the 0.25 A maximum regulator current at 50 °C defines safe continuous operation limits.
The DO-41 axial-leaded package delivers 45 °C/W junction-to-lead thermal resistance at 10 mm lead length, enabling reliable 1 W dissipation without forced cooling. Polarity is marked by cathode band; regulation requires cathode positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V ±5% at 17 mA - sets precise DC reference level for feedback loops or clamping thresholds |
| Power Dissipation | 1.0 W at TL < 105 °C - supports continuous regulation in compact PCB layouts with minimal heatsinking |
| Dynamic Impedance (ZZT) | 14 Ω at IZT = 17 mA - minimizes output voltage shift during transient load variations |
| Reverse Leakage Current | 5 µA max at VR = 11.4 V - ensures low standby power loss in high-impedance bias networks |
| Surge Current (ISM) | 304 mA (½-sine, 1/120 s) - withstands brief overvoltage transients without degradation |
| Thermal Resistance | 45 °C/W junction-to-lead - enables direct thermal path to PCB copper or chassis mounting |
| Operating Temperature | –65 °C to +150 °C - suitable for automotive under-hood and industrial control 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 per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires this terminal negative relative to cathode |
| Cathode | Zener regulation output | Banded end; must be held positive relative to anode to enter breakdown and regulate at 15 V |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4744A series | Industry-standard footprint and electrical behavior ensures design reuse and sourcing flexibility |
| RoHS-compliant "e3" suffix | Matte-tin plating meets lead-free soldering requirements without compromising solderability |
| Moisture sensitivity Level 1 | No dry-pack required - reduces handling cost and eliminates bake-out before SMT reflow |
| Low thermal resistance (45 °C/W) | Enables full 1 W power dissipation with only 45 °C temperature rise above lead point |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - survives handling without special static precautions |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator or switching converter error amplifier. IC Role / Device Role / Timing Role: Provides fixed 15 V reference against which output is compared. Use Value: ±5% tolerance and 14 Ω impedance ensure <±0.1 V output variation across 1–300 mA load current. | Use Scenario: Protecting downstream ICs from transient voltage spikes on 12 V rail. IC Role / Device Role / Timing Role: Shunts excess energy to ground when rail exceeds 15 V. Use Value: 304 mA surge rating absorbs 100 ms transients without failure; 5 µA leakage avoids loading normal operation. |
| Bias Network Stabilizer | Signal-Level Limiter |
Use Scenario: Setting stable operating point for op-amp input stage or transistor amplifier. IC Role / Device Role / Timing Role: Supplies temperature-stable bias voltage independent of supply fluctuations. Use Value: –65 °C to +150 °C operation maintains regulation across extended ambient ranges; 0.25 A IZM supports multi-stage bias networks. | Use Scenario: Preventing ADC input overload in sensor signal conditioning front-end. IC Role / Device Role / Timing Role: Clamps analog signal peaks to 15 V to avoid saturation or damage. Use Value: Fast response in reverse breakdown mode limits overshoot within nanoseconds; DO-41 axial leads simplify prototyping and manual placement. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A-T | Same 15 V, ±5%, DO-41, but non-RoHS (Sn/Pb plating); no "e3" suffix | Not suitable for lead-free assembly; otherwise identical regulation performance | Select when legacy Sn/Pb process is used and RoHS compliance is not required |
| MMSZ4702T1G | Surface-mount SOD-123 package; same 15 V, ±5%, but lower 500 mW power rating | Requires PCB redesign; unsuitable for 1 W continuous dissipation | Choose only for space-constrained designs where power demand stays below 500 mW |
Compared with 1N4744A-T and MMSZ4702T1G, the 1N4744APE3/TR12 uniquely combines RoHS compliance, 1 W power handling, DO-41 mechanical robustness, and tape-and-reel automation support-making it optimal for high-volume industrial power supply manufacturing.
Availability
1N4744APE3/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and bias network stabilization requiring stable component supply and long-term obsolescence management.
Supply support for 1N4744APE3/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 and mixed-signal components 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 performance, and moisture resilience are critical.
FAQ
What is the Zener voltage tolerance of the 1N4744APE3/TR12?
The 1N4744APE3/TR12 has a nominal Zener voltage of 15 V with a tolerance of ±5%, as confirmed by its "A" suffix per JEDEC standard. This tolerance applies at 25 °C lead temperature with 17 mA test current and ensures predictable regulation across production batches without requiring post-manufacture trimming.
Can the 1N4744APE3/TR12 be used in surface-mount designs?
No-the 1N4744APE3/TR12 uses a DO-41 axial-leaded package and is not compatible with surface-mount assembly. For SMT equivalents, consider the SMAJ4744A or MLL4744A series, which share the same 15 V, ±5% specification but use DO-214AC or SOD-123 footprints respectively.
What is the maximum steady-state current the 1N4744APE3/TR12 can regulate continuously?
The 1N4744APE3/TR12 supports a maximum regulator current (IZM) of 0.25 A at 50 °C ambient, decreasing per the derating curve. At 25 °C lead temperature, it safely regulates up to 304 mA, but sustained operation above 250 mA requires thermal management to maintain junction temperature below 150 °C.
Does the 1N4744APE3/TR12 require dry-packing before reflow soldering?
No-the 1N4744APE3/TR12 is rated IPC/JEDEC J-STD-020B Moisture Sensitivity Level 1, meaning it may be stored indefinitely at ambient conditions without dry packing or baking prior to soldering, simplifying inventory handling and reducing assembly risk.
How does the thermal resistance of the 1N4744APE3/TR12 affect PCB layout?
The 1N4744APE3/TR12 has a junction-to-lead thermal resistance of 45 °C/W at 10 mm lead length. To achieve full 1 W dissipation, PCB traces connected to its leads should be wide (≥1 mm) and thermally coupled to ≥4 mm² copper pads; longer leads increase thermal resistance and reduce safe operating power.
1N4744APE3/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:
- ±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/TR12 FAQ
1.How can I place an order for 1N4744APE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4744APE3/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 1N4744APE3/TR12 reliable?
The price and inventory of 1N4744APE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4744APE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4744APE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4744APE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4744APE3/TR12?
1N4744APE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4744APE3/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 1N4744APE3/TR12?
For technical support, including 1N4744APE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4744APE3/TR12 requirements.
6.How does Aetrix verify that 1N4744APE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4744APE3/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 1N4744APE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4744APE3/TR12?
All 1N4744APE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4744APE3/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 1N4744APE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4744APE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4744APE3/TR12 Tags
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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
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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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
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SMAZ12-13-F
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