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Microchip Technology 1N4739CE3/TR13
- Part No.:
- 1N4739CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4739CE3/TR13.pdf
- Description:
- DIODE ZENER 9.1V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,483
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Product details
Overview
1N4739CE3/TR13 from Microsemi is a 9.1 V, ±2% tolerance, 1 W axial-lead Zener diode in DO-41 package, rated for 28 mA test current, 5 Ω dynamic impedance at IZT, and 7 µA reverse leakage at 7.2 V, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4739CE3/TR13 datasheet, 1N4739CE3/TR13 pinout, 1N4739CE3/TR13 application, or 1N4739CE3/TR13 equivalent, key selection criteria include Zener voltage tolerance (±2%), 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 device operates in reverse breakdown to maintain stable output voltage across varying load and line conditions. Its 9.1 V nominal Zener voltage is specified at 28 mA test current with ±2% tolerance (C suffix), and exhibits low dynamic impedance (5 Ω) ensuring minimal voltage deviation under dynamic current changes.
Designed for operation from –65 °C to +150 °C, it delivers 1.0 W steady-state power dissipation at lead temperature <105 °C (3/8″ from body) or ambient <45 °C on FR4 board, with thermal resistance of 45 °C/W junction-to-lead and 105 °C/W junction-to-ambient under defined PCB layout conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V ±2% at 28 mA - ensures tight regulation for reference-sensitive analog circuits |
| Power Dissipation | 1.0 W at TL < 105 °C - supports continuous operation in compact power supplies |
| Dynamic Impedance (ZZT) | 5 Ω at IZT = 28 mA - minimizes output voltage variation during load transients |
| Reverse Leakage Current | 7 µA max at VR = 7.2 V - maintains low quiescent power in standby modes |
| Surge Current (ISM) | 500 mA (½-sine, 1/120 s) - withstands brief overvoltage events without degradation |
| Thermal Resistance | 45 °C/W junction-to-lead - enables reliable heat transfer through axial leads |
| Operating Temperature | –65 °C to +150 °C - suitable for industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by color band; terminals are non-polarized for mounting but operated with banded end positive for Zener regulation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference | Connected to circuit ground or lower potential node during regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Banded end; connected to regulated rail; must be held positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant matte-tin plating | Meets MIL-STD-750 Method 2026 solderability; eliminates lead-based assembly constraints |
| Moisture sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies handling and storage |
| ESD robustness | Nonsensitive per MIL-STD-750 Method 1020 - reduces risk of field failure in handling |
| Tape-and-reel packaging | EIA-296 compliant (TR13 suffix) - enables automated SMT-compatible placement despite axial form |
| Plastic encapsulation (P suffix) | Lower thermal resistance vs. glass-body variants - improves power handling reliability |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in isolated DC-DC converter secondary-side error amplifiers. IC Role / Device Role / Timing Role: Zener diode providing precise 9.1 V reference to optocoupler input or TL431 bias network. Use Value: ±2% tolerance and 5 Ω ZZT ensure <±0.2 V drift across production units and temperature range. | Use Scenario: Clamping transient surges on 12 V automotive sensor supply lines. IC Role / Device Role / Timing Role: Shunt regulator absorbing energy above 9.1 V to protect downstream op-amps and ADCs. Use Value: 500 mA surge rating and –65 °C to +150 °C operation support AEC-Q200–aligned robustness. |
| Programmable Voltage Monitor Threshold | Low-Power Battery Voltage Regulator |
Use Scenario: Setting trip point for comparator-based battery undervoltage lockout in portable medical devices. IC Role / Device Role / Timing Role: Precision Zener defining hysteresis window via resistor divider into comparator input. Use Value: Tight 9.1 V ±2% tolerance eliminates calibration step and reduces BOM count. | Use Scenario: Regulating 9.1 V rail for microcontroller reset circuitry in solar-powered IoT nodes. IC Role / Device Role / Timing Role: Low-quiescent shunt regulator maintaining stable logic supply from variable LiFePO4 source. Use Value: 7 µA leakage at 7.2 V minimizes drain during sleep mode while sustaining regulation margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4739A | Same 9.1 V, but ±5% tolerance (A suffix) and no RoHS compliance (Sn/Pb plating) | Acceptable where cost sensitivity outweighs precision or environmental compliance | Select only if legacy Sn/Pb assembly is mandated and ±5% regulation is sufficient |
| BZX55C9V1 | 9.1 V ±5%, 500 mW power rating, DO-35 package, higher ZZT (10 Ω) | Lower power and less precise; unsuitable for 1 W continuous or tight-tolerance use | Use only in space-constrained, low-power signal-level clamping where 500 mW suffices |
Compared with 1N4739A and BZX55C9V1, the 1N4739CE3/TR13 offers superior precision (±2% vs. ±5%), full RoHS compliance, and 1 W power capability - making it the preferred choice for industrial-grade reference and clamp designs requiring long-term stability and regulatory alignment.
Availability
1N4739CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive sensor protection, and programmable voltage monitoring requiring stable component supply with traceable sourcing and lifecycle continuity.
Supply support for 1N4739CE3/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N47xx series was designed for general-purpose, high-stability Zener regulation in harsh-environment power systems - emphasizing wide temperature range, moisture resilience, and military-grade screening options.
FAQ
What is the Zener voltage tolerance of the 1N4739CE3/TR13?
The 1N4739CE3/TR13 has a Zener voltage tolerance of ±2%, denoted by the "C" suffix in the part number. This means its nominal 9.1 V Zener voltage is guaranteed between 8.92 V and 9.28 V when measured at 28 mA test current and 25 °C lead temperature, supporting precision reference applications where tighter regulation than standard ±5% parts is required.
Does the 1N4739CE3/TR13 meet RoHS requirements?
Yes, the 1N4739CE3/TR13 meets RoHS requirements, confirmed by the "e3" suffix indicating RoHS-compliant annealed matte-tin plating per MIL-STD-750 Method 2026. It contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE, and is suitable for environmentally regulated industrial and consumer electronics manufacturing.
What is the maximum surge current rating for the 1N4739CE3/TR13?
The 1N4739CE3/TR13 has a maximum surge current (ISM) rating of 500 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating allows the device to safely absorb transient overvoltage events in power rails without permanent degradation, making it suitable for clamping in automotive and industrial environments.
How is polarity marked on the 1N4739CE3/TR13?
The 1N4739CE3/TR13 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a more positive potential than the anode to operate in Zener breakdown mode. This marking follows JEDEC DO-41 standards and is visible on the black epoxy body; incorrect orientation results in forward conduction instead of regulation.
What packaging format does the "TR13" suffix indicate for the 1N4739CE3/TR13?
"TR13" indicates tape-and-reel packaging per EIA-296 standard, with 13-inch reels containing 5,000 units. This format enables automated pick-and-place assembly despite the axial-leaded DO-41 package, supporting high-volume manufacturing while preserving moisture sensitivity Level 1 handling requirements (no dry pack needed).
1N4739CE3/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):
- 9.1 V
- Tolerance:
- ±2%
- 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)
1N4739CE3/TR13 FAQ
1.How can I place an order for 1N4739CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4739CE3/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 1N4739CE3/TR13 reliable?
The price and inventory of 1N4739CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4739CE3/TR13 is usually 5 days.
3.What payment methods are accepted for 1N4739CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4739CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4739CE3/TR13?
1N4739CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4739CE3/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 1N4739CE3/TR13?
For technical support, including 1N4739CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4739CE3/TR13 requirements.
6.How does Aetrix verify that 1N4739CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All 1N4739CE3/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 1N4739CE3/TR13 meets industry standards.
7.What is the process for return or replacement of 1N4739CE3/TR13?
All 1N4739CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4739CE3/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 1N4739CE3/TR13 part is unused and in its original packaging.
Return procedure for 1N4739CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4739CE3/TR13 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
Diodes Incorporated
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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
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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