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Microchip Technology 1N4739PE3/TR12
- Part No.:
- 1N4739PE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4739PE3/TR12.pdf
- Description:
- DIODE ZENER 9.1V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,714
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Product details
Overview
1N4739PE3/TR12 from Microsemi is a 1.0 W, 9.1 V ±5% axial-lead silicon Zener diode in DO-41 plastic package, rated for 28 mA test current, 5.0 Ω dynamic impedance at IZT, and 7.0 μA reverse leakage at 7.0 V, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4739PE3/TR12 datasheet, 1N4739PE3/TR12 pinout, 1N4739PE3/TR12 application, or 1N4739PE3/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45 °C/W junction-to-lead), surge current rating (500 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging per EIA-296.
Technical Context
This Zener operates in reverse breakdown to maintain stable output voltage across varying load and line conditions. Its 9.1 V nominal regulation is specified at 28 mA with ±5% tolerance ('A' suffix), and it exhibits low dynamic impedance (5.0 Ω) ensuring minimal voltage deviation under dynamic current changes.
Designed for operation from –65 °C to +150 °C, the device features moisture sensitivity Level 1 (no dry pack required), UL94V-0 epoxy body, and cathode band polarity marking. Thermal performance is defined for both lead-temperature (TL) and ambient (TA) mounting conditions on FR4 PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±5% at 28 mA - defines precise regulation point for feedback references and clamp thresholds |
| Power Dissipation | 1.0 W at TL < 105 °C - sets maximum continuous DC power handling in lead-mounted configurations |
| Dynamic Impedance (ZZT) | 5.0 Ω at IZT = 28 mA - determines output voltage stability under small-signal AC load variations |
| Reverse Leakage (IR) | 7.0 μA at VR = 7.0 V - ensures low standby current in high-impedance bias networks |
| Surge Current (ISM) | 500 mA (½-sine, 1/120 s) - supports transient overvoltage clamping without failure |
| Thermal Resistance | 45 °C/W junction-to-lead (3/8″ lead length) - enables thermal design of heatsinking and board layout |
| Forward Voltage | 1.2 V max at 200 mA - defines conduction loss when used in forward-biased protection paths |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode indicated by colored band; terminals are non-polarized leads suitable for through-hole mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in regulation mode; forms reference ground return path |
| Cathode | Zener breakdown terminal / regulation output node | Banded end; connected to higher-potential rail to establish regulated voltage at cathode-to-anode drop |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant matte-tin plating | Enables lead-free reflow soldering per JEDEC J-STD-020B without Sn/Pb contamination risk |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for assembly logistics |
| Low thermal resistance (45 °C/W) | Supports higher power density in compact leaded designs versus glass-body alternatives |
| JEDEC-registered 1N47xxAP series | Guarantees standardized electrical behavior and interchangeability across qualified suppliers |
| Tape-and-reel packaging (TR12) | Enables automated pick-and-place placement with EIA-296 standard carrier dimensions |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete op-amp-based regulators. IC Role / Device Role / Timing Role: Zener reference element providing fixed 9.1 V reference for error amplifier input. Use Value: Maintains ±5% output accuracy across temperature and load, leveraging 5.0 Ω ZZT to suppress ripple-induced drift. | Use Scenario: Protecting microcontroller I/O pins from ESD or inductive switching transients. IC Role / Device Role / Timing Role: Shunt clamping device diverting surge current above 9.1 V to ground. Use Value: Absorbs 500 mA surge pulses without degradation, enabled by robust 1.0 W steady-state and ½-sine pulse rating. |
| DC Bias Network | Signal-Level Voltage Limiter |
Use Scenario: Establishing stable bias points in RF amplifier stages or analog sensor interfaces. IC Role / Device Role / Timing Role: Precision DC voltage source setting quiescent operating point. Use Value: Delivers <7.0 μA leakage at 7.0 V, minimizing current draw in high-impedance bias dividers. | Use Scenario: Limiting audio signal peaks in line-level driver circuits to prevent amplifier clipping. IC Role / Device Role / Timing Role: Symmetrical clipping element (with series diode) constraining peak amplitude. Use Value: Provides sharp 9.1 V knee with 5.0 Ω ZZT, enabling clean, repeatable clipping threshold independent of source impedance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4739A | No "P" (plastic) or "e3" (RoHS) suffix; glass-body construction; higher thermal resistance (≈70 °C/W) | Less suitable for high-power-density or lead-free assembly environments | Select 1N4739PE3/TR12 for RoHS compliance, lower thermal resistance, and tape-and-reel automation |
| MMSZ4702T1G | Surface-mount SOD-123 package; 9.1 V ±5%; 500 mW rating; 10 Ω ZZT; 10 μA IR | Lower power and smaller footprint; not interchangeable in through-hole layouts | Choose MMSZ4702T1G only when space-constrained PCBs and SMT processes are mandatory |
Compared with 1N4739A and MMSZ4702T1G, the 1N4739PE3/TR12 delivers superior thermal performance (45 °C/W vs. ~70 °C/W), full RoHS compliance, and EIA-296 tape-and-reel support-making it optimal for industrial power supplies requiring long-term reliability and automated manufacturing.
Availability
1N4739PE3/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, and DC bias network applications requiring stable component supply, consistent Zener voltage tolerance, and RoHS-compliant manufacturing.
Supply support for 1N4739PE3/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 1N47xxAP series was developed to deliver JEDEC-standardized, high-stability Zener regulation in ruggedized plastic packages for mission-critical power management and protection functions.
FAQ
What is the Zener voltage tolerance of the 1N4739PE3/TR12?
The 1N4739PE3/TR12 has a nominal Zener voltage of 9.1 V with a ±5% tolerance, as indicated by the 'A' suffix in its JEDEC designation. This tolerance is verified at 28 mA test current and 25 °C lead temperature. The 1N4739PE3/TR12 maintains this specification across its full operating temperature range (–65 °C to +150 °C), supporting stable regulation in demanding environments.
Is the 1N4739PE3/TR12 RoHS compliant?
Yes, the 1N4739PE3/TR12 is RoHS compliant, confirmed by the "e3" suffix in its part number, indicating annealed matte-tin plating per MIL-STD-750 Method 2026. It meets EU Directive 2011/65/EU requirements and is suitable for lead-free reflow soldering processes without exemption waivers.
What is the maximum surge current rating for the 1N4739PE3/TR12?
The 1N4739PE3/TR12 is rated for a maximum surge current (ISM) of 500 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating enables reliable transient clamping in power supply and interface protection circuits without permanent degradation of the 1N4739PE3/TR12's regulation characteristics.
Does the 1N4739PE3/TR12 require dry packing before use?
No, the 1N4739PE3/TR12 does not require dry packing. It is moisture sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored and assembled without humidity-controlled packaging or baking. This simplifies inventory handling and eliminates floor-life tracking for the 1N4739PE3/TR12 in production environments.
What package type is used for the 1N4739PE3/TR12?
The 1N4739PE3/TR12 uses the DO-41 (also designated DO-204AL) axial-lead plastic package. It features a void-free UL94V-0 epoxy body, tin-plated leads, and cathode identification via a visible band. The "P" suffix in the part number explicitly denotes this plastic construction, distinguishing it from glass-body variants.
1N4739PE3/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):
- 9.1 V
- Tolerance:
- ±10%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 7 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)
1N4739PE3/TR12 FAQ
1.How can I place an order for 1N4739PE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4739PE3/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 1N4739PE3/TR12 reliable?
The price and inventory of 1N4739PE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4739PE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4739PE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4739PE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4739PE3/TR12?
1N4739PE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4739PE3/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 1N4739PE3/TR12?
For technical support, including 1N4739PE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4739PE3/TR12 requirements.
6.How does Aetrix verify that 1N4739PE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4739PE3/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 1N4739PE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4739PE3/TR12?
All 1N4739PE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4739PE3/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 1N4739PE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4739PE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4739PE3/TR12 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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onsemi
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MM5Z5V1ST1G
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