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Microchip Technology 1N4744CPE3/TR12
- Part No.:
- 1N4744CPE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4744CPE3/TR12.pdf
- Description:
- DIODE ZENER 15V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:6,764
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Product details
Overview
1N4744CPE3/TR12 from Microsemi is a 15 V, 2% tolerance, 1 W silicon Zener diode in DO-41 plastic package, rated for 17 mA test current, 14 Ω dynamic impedance at IZT, and 5 μA reverse leakage at 11.4 V, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4744CPE3/TR12 datasheet, 1N4744CPE3/TR12 pinout, 1N4744CPE3/TR12 application, or 1N4744CPE3/TR12 equivalent, key selection criteria include Zener voltage tolerance (±2%), thermal resistance (45 °C/W junction-to-lead), surge current rating (304 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging (TR12).
Technical Context
This Zener operates in reverse breakdown to maintain stable 15 V output across 0.25–304 mA regulation current range, with sharp knee characteristics verified by dual-point Zener impedance measurement per MicroNote 202. Its DO-41 axial-leaded plastic package provides Level 1 moisture sensitivity and 0.7 g mass.
Designed for operation at lead temperature ≤105 °C or ambient ≤45 °C on FR4 board (1 oz Cu, 4 mm² pad), it delivers 1.2 V max forward voltage at 200 mA and withstands 260 °C soldering for 10 s. Polarity is marked by cathode band; regulation requires banded end positive relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 15 V ±2% at 17 mA - ensures tight reference stability for feedback loops and analog sensing |
| Power Dissipation | 1.0 W at TL < 105 °C - supports continuous regulation without forced cooling in compact layouts |
| Dynamic Impedance (ZZT) | 14 Ω at IZT = 17 mA - minimizes output voltage variation under load transients |
| Reverse Leakage Current | 5 μA max at VR = 11.4 V - guarantees low quiescent error in high-impedance bias networks |
| Surge Current (ISM) | 304 mA (½-sine, 1/120 s) - enables transient overvoltage clamping without degradation |
| Thermal Resistance | 45 °C/W junction-to-lead (3/8″ lead length) - allows accurate thermal design using lead conduction path |
| Operating Temperature | −65 °C to +150 °C - qualified for automotive under-hood and industrial control environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with void-free UL94V-0 epoxy body, tin-lead or RoHS-compliant matte-tin plating, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; defines regulation reference point |
| Cathode | Zener output terminal | Banded end; held at regulated 15 V when reverse-biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance (C suffix) | Enables high-accuracy voltage references without external trimming in feedback networks |
| RoHS-compliant "e3" suffix | Meets EU Directive 2011/65/EU with annealed matte-tin plating, solderable per MIL-STD-750 |
| Tape-and-reel packaging (TR12) | Supports automated SMT placement despite axial-leaded form factor via carrier tape handling |
| Level 1 moisture sensitivity | Eliminates dry-pack requirement and bake-out prior to assembly, reducing manufacturing cost |
| Nonsensitive to ESD (MIL-STD-750 Method 1020) | Withstands handling without special static precautions, simplifying production line logistics |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Zener reference element providing precise 15 V setpoint for error amplifier input. Use Value: ±2% tolerance ensures output voltage accuracy within 0.3 V over temperature and line variations. | Use Scenario: Clamping transient spikes on 12 V automotive or industrial DC rails. IC Role / Device Role / Timing Role: Shunt protector diverting surge current above 15 V to ground before downstream components fail. Use Value: 304 mA surge rating handles ISO 7637-2 pulse 1/2/5a without parametric shift or failure. |
| Signal Level Translation | Current Source Biasing |
Use Scenario: Generating fixed bias voltages for op-amp input stages or sensor excitation circuits. IC Role / Device Role / Timing Role: Stable 15 V reference source for precision analog front-ends requiring low-drift offsets. Use Value: 14 Ω dynamic impedance maintains <0.2 V deviation across 1–10 mA load current changes. | Use Scenario: Setting constant current in LED driver or transistor bias networks via series resistor. IC Role / Device Role / Timing Role: Voltage reference defining current magnitude through Ohm's Law (I = (VIN − 15 V)/R). Use Value: Low 5 μA leakage at 11.4 V prevents significant error in microamp-level bias currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A | Same 15 V nominal, but ±5% tolerance (A suffix) vs. ±2% (C suffix) | Acceptable where 0.75 V total error budget permits; less suitable for precision feedback | Select 1N4744CPE3/TR12 when tighter regulation stability is required across temperature and life |
| BZX55-C15 | 15 V ±5%, 500 mW rating, DO-35 glass package, higher ZZT (20 Ω) | Lower power handling and looser tolerance limit use in non-critical clamping or biasing | Choose 1N4744CPE3/TR12 for 1 W dissipation, DO-41 mechanical robustness, and RoHS compliance |
Compared with 1N4744A and BZX55-C15, the 1N4744CPE3/TR12 offers superior voltage accuracy, higher power capability, and industrial-grade packaging-making it optimal for automotive and industrial systems demanding long-term regulation stability and thermal resilience.
Availability
1N4744CPE3/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and signal level translation applications requiring stable component supply, consistent Zener voltage tolerance, and RoHS-compliant manufacturing.
Supply support for 1N4744CPE3/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N4744CPE3/TR12 belongs to Microsemi's legacy 1N47xxAP Zener family, engineered for precision voltage regulation in harsh-environment power systems where thermal stability, surge resilience, and long-term parameter consistency are critical.
FAQ
What is the Zener voltage tolerance of the 1N4744CPE3/TR12?
The 1N4744CPE3/TR12 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its regulated voltage remains within 14.7 V to 15.3 V at 17 mA test current and 25 °C lead temperature, enabling high-accuracy reference designs where tighter regulation than standard ±5% parts is required.
Does the 1N4744CPE3/TR12 meet RoHS requirements?
Yes, the 1N4744CPE3/TR12 complies with EU RoHS Directive 2011/65/EU, confirmed by the "e3" suffix indicating RoHS-compliant annealed matte-tin plating. It uses lead-free terminations and void-free UL94V-0 epoxy packaging, with no exemptions required for hazardous substances.
What is the maximum surge current rating for the 1N4744CPE3/TR12?
The 1N4744CPE3/TR12 is rated for 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 overvoltage clamping in automotive and industrial power rails without permanent parameter shift.
How is polarity marked on the 1N4744CPE3/TR12?
The 1N4744CPE3/TR12 uses a cathode band to indicate polarity: the banded end is the cathode and must be held positive relative to the anode for proper Zener regulation. This marking aligns with JEDEC DO-41 standards and ensures correct orientation during PCB assembly and circuit operation.
What does the "TR12" suffix indicate in 1N4744CPE3/TR12?
"TR12" indicates tape-and-reel packaging per EIA-296 standard, with 12 mm tape width. This format enables automated pick-and-place assembly for the axial-leaded DO-41 device, supporting high-volume manufacturing while maintaining traceability and moisture-sensitive handling compliance.
1N4744CPE3/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:
- ±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)
1N4744CPE3/TR12 FAQ
1.How can I place an order for 1N4744CPE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4744CPE3/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 1N4744CPE3/TR12 reliable?
The price and inventory of 1N4744CPE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4744CPE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4744CPE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4744CPE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4744CPE3/TR12?
1N4744CPE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4744CPE3/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 1N4744CPE3/TR12?
For technical support, including 1N4744CPE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4744CPE3/TR12 requirements.
6.How does Aetrix verify that 1N4744CPE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4744CPE3/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 1N4744CPE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4744CPE3/TR12?
All 1N4744CPE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4744CPE3/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 1N4744CPE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4744CPE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4744CPE3/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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BZX84C3V3LT1G
onsemi
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Diodes Incorporated
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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Micro Commercial Co
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