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Microchip Technology 1N4743CP/TR12
- Part No.:
- 1N4743CP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4743CP/TR12.pdf
- Description:
- DIODE ZENER 13V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,055
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Product details
Overview
1N4743CP/TR12 from Microsemi is a 13 V, 1 W axial-lead silicon Zener diode in DO-41 plastic package with ±5% voltage tolerance, 19 mA test current, and 10 Ω dynamic impedance at IZT, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4743CP/TR12 datasheet, 1N4743CP/TR12 pinout, 1N4743CP/TR12 application, or 1N4743CP/TR12 equivalent, key selection factors include Zener voltage accuracy, thermal resistance (45 °C/W junction-to-lead), surge current rating (344 mA), RoHS-compliant matte-tin plating, and tape-and-reel packaging for automated assembly.
Technical Context
This Zener operates in reverse breakdown to maintain stable 13 V output across 19 mA test current and up to 344 mA maximum regulator current at TA = 50 °C. Its 10 Ω dynamic impedance ensures low AC ripple rejection, while the DO-41 package provides 45 °C/W junction-to-lead thermal resistance at 10 mm lead length.
Designed for DC voltage reference and clamping, it features a sharp knee at 0.25 mA test current (ZZK = 69 Ω), operates from –65 °C to +150 °C, and meets MIL-STD-750 ESD immunity per Method 1020 without sensitivity concerns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 13 V ±5% at 19 mA - defines regulated output level with tight tolerance for reference stability |
| Power Dissipation | 1.0 W at 25 °C - sets maximum continuous DC power handling before thermal derating |
| Dynamic Impedance (ZZT) | 10 Ω at 19 mA - determines AC voltage variation under load transients |
| Max Regulator Current (IZM) | 344 mA at TA = 50 °C - limits usable current range in constant-voltage mode |
| Knee Impedance (ZZK) | 69 Ω at 0.25 mA - indicates onset of stable regulation at low bias currents |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design with 10 mm lead length from body |
| Forward Voltage | ≤1.2 V at 200 mA - defines conduction loss if forward-biased accidentally |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by 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 during Zener operation; carries full regulator current |
| Cathode | Banded end | Connected to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard 1N47xxA family mechanical and electrical definitions |
| Plastic P-suffix construction | Lower thermal resistance vs. glass-body (G-suffix) variants for improved power handling |
| RoHS-compliant "e3" option | Matte-tin plating meets EU directive requirements without lead content |
| Tape-and-reel packaging | "TR12" suffix denotes EIA-296 standard reel format for SMT placement compatibility |
| Moisture Sensitivity Level 1 | No dry-pack required per IPC/JEDEC J-STD-020B - simplifies handling and storage |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Zener reference element providing fixed 13 V threshold for error amplifier input. Use Value: Maintains ±5% output accuracy across temperature and line variations due to low dynamic impedance and sharp knee. | Use Scenario: Protecting microcontroller I/O pins from transient voltage spikes on sensor interface lines. IC Role / Device Role / Timing Role: Shunt clamp device diverting excess energy above 13 V to ground. Use Value: Limits peak voltage to 13 V with 344 mA surge capability, preventing latch-up or damage to downstream logic. |
| Voltage Monitor Threshold | DC Bias Generator |
Use Scenario: Detecting undervoltage or overvoltage conditions in battery-powered instrumentation. IC Role / Device Role / Timing Role: Precision threshold detector feeding comparator input in monitoring circuitry. Use Value: Enables reliable 13 V trip point with <10 Ω impedance ensuring minimal loading error on sensing node. | Use Scenario: Establishing stable bias points for op-amp input stages or transistor amplifiers. IC Role / Device Role / Timing Role: Fixed-voltage source setting quiescent operating point in analog signal chains. Use Value: Delivers consistent 13 V reference with ≤1.2 V forward drop if reverse-connected during startup sequencing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4743A | No "P" suffix (glass body), no "TR12" tape-and-reel; same 13 V/1 W specs | Lacks moisture-level-1 compliance and RoHS plating; requires dry pack handling | Select when legacy glass-body form factor or non-RoHS compliance is acceptable |
| MMSZ4702T1G | Surface-mount SOD-123 package; 13 V ±5%, 500 mW rating; 20 mA IZT | Lower power rating and different thermal profile; not axial-leaded or tape-and-reel compatible | Select for space-constrained PCBs where DO-41 footprint is unavailable |
Compared with 1N4743A and MMSZ4702T1G, the 1N4743CP/TR12 uniquely combines DO-41 axial-leaded reliability, 1 W power handling, RoHS-compliant matte-tin plating, and EIA-296 tape-and-reel packaging-making it optimal for through-hole production requiring moisture-insensitive, high-current regulation.
Availability
1N4743CP/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage protection, voltage monitor threshold, and DC bias generation applications requiring stable component supply and JEDEC-standard Zener performance.
Supply support for 1N4743CP/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 developed to deliver JEDEC-standard, 1 W plastic Zener diodes with enhanced thermal performance and RoHS compliance for ruggedized power management and protection circuits.
FAQ
What is the Zener voltage tolerance of the 1N4743CP/TR12?
The 1N4743CP/TR12 has a nominal Zener voltage of 13 V with a ±5% tolerance, as indicated by the "A" suffix in its JEDEC designation. This tolerance applies at 19 mA test current and 25 °C lead temperature, ensuring predictable regulation across production lots and operating conditions. The 1N4743CP/TR12 maintains this specification under standard derating curves up to 150 °C junction temperature.
Does the 1N4743CP/TR12 require dry-pack handling?
No, the 1N4743CP/TR12 does not require dry-pack handling because it is moisture sensitivity level 1 per IPC/JEDEC J-STD-020B. Its void-free thermosetting epoxy body and RoHS-compliant matte-tin plating eliminate moisture absorption concerns, allowing indefinite ambient storage without baking or humidity-controlled environments. This simplifies logistics and reduces manufacturing prep time for the 1N4743CP/TR12.
What is the maximum surge current rating for the 1N4743CP/TR12?
The 1N4743CP/TR12 has a maximum surge current (ISM) rating of 344 mA, measured using a ½ sine-wave pulse of 1/120 second duration at 25 °C ambient. This rating supports transient overvoltage events in clamping applications without degradation. The 1N4743CP/TR12 sustains this surge capability due to its 1 W power rating and low thermal resistance (45 °C/W junction-to-lead).
How is polarity marked on the 1N4743CP/TR12?
The 1N4743CP/TR12 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode (non-banded end) for Zener regulation. This marking complies with JEDEC DO-41 standards and ensures correct orientation during PCB assembly. Reversing polarity causes forward conduction with ≤1.2 V drop, which may compromise regulation in the 1N4743CP/TR12.
What does the "TR12" suffix mean in 1N4743CP/TR12?
"TR12" indicates EIA-296 standard tape-and-reel packaging with 12 mm tape width, enabling automated pick-and-place assembly. It confirms the 1N4743CP/TR12 is supplied in reels compatible with surface-mount equipment, despite being an axial-leaded DO-41 device. This packaging format supports high-volume production while preserving the 1N4743CP/TR12's mechanical and electrical integrity.
1N4743CP/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):
- 13 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 9.9 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)
1N4743CP/TR12 FAQ
1.How can I place an order for 1N4743CP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4743CP/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 1N4743CP/TR12 reliable?
The price and inventory of 1N4743CP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4743CP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4743CP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4743CP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4743CP/TR12?
1N4743CP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4743CP/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 1N4743CP/TR12?
For technical support, including 1N4743CP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4743CP/TR12 requirements.
6.How does Aetrix verify that 1N4743CP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4743CP/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 1N4743CP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4743CP/TR12?
All 1N4743CP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4743CP/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 1N4743CP/TR12 part is unused and in its original packaging.
Return procedure for 1N4743CP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4743CP/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
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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