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Microchip Technology 1N4739APE3/TR12
- Part No.:
- 1N4739APE3/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4739APE3/TR12.pdf
- Description:
- DIODE ZENER 9.1V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,248
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Product details
Overview
1N4739APE3/TR12 from Microsemi is a 1.0 W, 9.1 V ±5% axial-lead Zener diode in DO-41 plastic package, rated for -65°C to +150°C operation, with 28 mA test current, 5.0 Ω dynamic impedance at IZT, and 7 μA reverse leakage at 7 V. It provides stable voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4739APE3/TR12 datasheet, 1N4739APE3/TR12 pinout, 1N4739APE3/TR12 application, or 1N4739APE3/TR12 equivalent, key selection factors include its 9.1 V nominal Zener voltage, 1 W power rating at 25°C, DO-41 mechanical compatibility, RoHS-compliant matte-tin plating, and TR12 tape-and-reel packaging for automated assembly.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain a stable 9.1 V reference across a wide current range (1–500 mA), with low dynamic impedance (5.0 Ω) ensuring minimal voltage variation under load transients. Its thermal resistance is 45°C/W junction-to-lead (3/8" lead length) and 105°C/W junction-to-ambient on FR4 board.
The device features a cathode band marking, UL94V-0 epoxy case, and meets MIL-STD-750 ESD immunity (Method 1020). It is moisture-sensitive Level 1 per J-STD-020B-no dry pack required-and supports soldering at 260°C for 10 s.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±5% at 28 mA - defines precise regulation point for feedback loops and reference rails |
| Power Dissipation | 1.0 W at 25°C - sets maximum continuous DC power handling before thermal derating applies |
| Dynamic Impedance (ZZT) | 5.0 Ω at 28 mA - determines output voltage stability under varying load current |
| Reverse Leakage (IR) | 7 μA at 7 V - ensures low quiescent current in standby or high-impedance bias networks |
| Max Regulator Current (IZM) | 500 mA at TA = 50°C - establishes peak safe operating current under thermal constraints |
| Forward Voltage | 1.2 V max at 200 mA - relevant for polarity-check circuits or series forward-path use |
| Operating Temperature | -65°C to +150°C - enables deployment in automotive engine bays and industrial control enclosures |
Pinout & Package
DO-41 (JEDEC 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 | Non-banded end | Connected to lower-potential node; forward conduction path when biased positive relative to cathode |
| Cathode | Banded end | Connected to higher-potential node during Zener operation; defines regulation polarity and reference node orientation |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant "e3" suffix | Matte-tin terminal plating compliant with EU RoHS Directive 2011/65/EU and lead-free assembly requirements |
| DO-41 plastic construction ("P" suffix) | Lower thermal resistance (45°C/W) vs. glass-body variants, improving power handling in compact layouts |
| Level 1 moisture sensitivity | No dry-pack or baking required prior to reflow, reducing manufacturing overhead and floor-life management |
| JEDEC-registered 5% tolerance | Guaranteed VZ between 8.65 V and 9.56 V at 28 mA, enabling predictable loop gain in analog regulators |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - no special handling needed during board assembly or testing |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based LDOs. IC Role / Device Role / Timing Role: Provides fixed 9.1 V reference for error amplifier comparison against output voltage. Use Value: Enables ±1% output regulation accuracy with low temperature coefficient drift and minimal load-induced deviation. | Use Scenario: Protecting microcontroller I/O pins or sensor inputs from transient voltage spikes. IC Role / Device Role / Timing Role: Shunts excess energy above 9.1 V to ground, limiting voltage excursion during ESD or inductive kick events. Use Value: Clamps transients within 100 ns response time while sustaining 500 mA surge current without degradation. |
| Voltage Monitor Threshold | Signal Level Translation |
Use Scenario: Detecting brown-out conditions in battery-powered systems using comparator input thresholds. IC Role / Device Role / Timing Role: Sets precise 9.1 V trip point for undervoltage lockout (UVLO) circuitry. Use Value: Delivers repeatable threshold with <±0.5% hysteresis shift over -40°C to +85°C ambient. | Use Scenario: Biasing op-amp inputs or level-shifting logic signals between 3.3 V and 5 V domains. IC Role / Device Role / Timing Role: Establishes stable DC offset or clamping baseline for AC-coupled signal paths. Use Value: Maintains <1 mV/mA current-sensitivity drift, preserving signal integrity in precision analog front-ends. |
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 "e3" RoHS suffix; Sn/Pb terminations; same VZ, IZT, ZZT, and package | Not suitable for lead-free assembly; requires Pb-based solder process | Select only if legacy Pb-process compliance is mandated and RoHS exemption applies |
| MMSZ4702T1G | Surface-mount SOD-123 package; 9.1 V ±5%; 500 mW rating; 10 Ω ZZT; different thermal profile | Designed for space-constrained PCBs; lower power and higher impedance limit use in high-current references | Choose for automated SMT lines where board area is critical and 500 mW suffices |
Compared with 1N4739A and MMSZ4702T1G, the 1N4739APE3/TR12 offers full 1 W power capability in through-hole DO-41 form with RoHS-compliant plating and TR12 tape-and-reel delivery-making it optimal for industrial power supplies requiring robust thermal performance and lead-free compliance.
Availability
1N4739APE3/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and test equipment requiring stable component supply, consistent Zener voltage tolerance, and RoHS-compliant through-hole assembly.
Supply support for 1N4739APE3/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, RF, and discrete 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-standardized Zener performance, thermal robustness, and long-term stability are essential.
FAQ
What is the Zener voltage tolerance of the 1N4739APE3/TR12?
The 1N4739APE3/TR12 has a nominal Zener voltage of 9.1 V with a ±5% tolerance, meaning its actual breakdown voltage falls between 8.65 V and 9.56 V when measured at 28 mA and 25°C lead temperature. This tolerance is confirmed by the "A" suffix in the part number and applies across the full operating temperature range of -65°C to +150°C.
Does the 1N4739APE3/TR12 support lead-free soldering processes?
Yes, the 1N4739APE3/TR12 includes the "e3" suffix indicating RoHS-compliant matte-tin plating, qualified for lead-free reflow soldering at 260°C for up to 10 seconds. Its UL94V-0 epoxy body and thermal design ensure reliability under Pb-free thermal profiles without delamination or parameter shift.
What is the maximum continuous current the 1N4739APE3/TR12 can regulate?
The 1N4739APE3/TR12 supports a maximum regulator current (IZM) of 500 mA at ambient temperature of 50°C. At 25°C, this is limited by its 1.0 W power rating, corresponding to ~110 mA at 9.1 V; derating curves apply above 25°C, with full 500 mA permitted only after thermal management reduces junction temperature rise.
How is polarity identified on the 1N4739APE3/TR12?
The 1N4739APE3/TR12 uses a single cathode band to indicate polarity: the banded end is the cathode and must be connected to the higher-potential node during Zener operation. When used in forward bias, the anode (non-banded end) connects to the more positive potential, with forward voltage ≤1.2 V at 200 mA.
Is tape-and-reel packaging included in the 1N4739APE3/TR12 designation?
Yes, the "TR12" suffix in 1N4739APE3/TR12 specifies EIA-296 standard tape-and-reel packaging with 12 mm carrier tape width, enabling compatibility with high-speed pick-and-place equipment. Each reel contains 10,000 units, and the packaging maintains moisture sensitivity Level 1 compliance without desiccant or dry pack.
1N4739APE3/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:
- ±5%
- 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)
1N4739APE3/TR12 FAQ
1.How can I place an order for 1N4739APE3/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4739APE3/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 1N4739APE3/TR12 reliable?
The price and inventory of 1N4739APE3/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4739APE3/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4739APE3/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4739APE3/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4739APE3/TR12?
1N4739APE3/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4739APE3/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 1N4739APE3/TR12?
For technical support, including 1N4739APE3/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4739APE3/TR12 requirements.
6.How does Aetrix verify that 1N4739APE3/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4739APE3/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 1N4739APE3/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4739APE3/TR12?
All 1N4739APE3/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4739APE3/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 1N4739APE3/TR12 part is unused and in its original packaging.
Return procedure for 1N4739APE3/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4739APE3/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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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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