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Microchip Technology 1N4741CP/TR12
- Part No.:
- 1N4741CP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4741CP/TR12.pdf
- Description:
- DIODE ZENER 11V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,241
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Product details
Overview
1N4741CP/TR12 from Microsemi is a 1 W, 11 V ±5% Zener diode in DO-41 plastic package, designed for precision voltage regulation in power supply feedback loops, reference circuits, and overvoltage protection. It delivers stable Zener voltage at 23 mA test current, with 8 Ω dynamic impedance, 10 µA reverse leakage at 8.4 V, and operates from –65°C to +150°C.
For engineers reviewing the 1N4741CP/TR12 datasheet, 1N4741CP/TR12 pinout, 1N4741CP/TR12 application, or 1N4741CP/TR12 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (45°C/W junction-to-lead), surge current rating (414 mA), RoHS-compliant "e3" plating, and tape-and-reel packaging per EIA-296.
Technical Context
This discrete Zener diode operates in reverse breakdown mode to maintain a stable 11 V reference across a wide current range (0.25–414 mA). Its low dynamic impedance (8 Ω @ 23 mA) ensures minimal voltage variation under load transients, while its –65°C to +150°C operating range supports industrial and automotive environments.
The DO-41 axial-leaded package provides flexible through-hole mounting with 0.7 g mass and UL94V-0 epoxy body. Cathode polarity is marked by a band; operation requires cathode-positive bias relative to anode for regulation. Thermal performance is specified at 3/8″ (10 mm) lead length from body (45°C/W) or on FR4 PCB (105°C/W).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V ±5% at 23 mA - defines nominal regulation point with tight tolerance for stable reference generation |
| Power Dissipation | 1.0 W at TL < 105°C - limits continuous power handling without derating in lead-mounted configurations |
| Dynamic Impedance (ZZT) | 8 Ω @ IZT = 23 mA - determines output voltage stability under varying load current |
| Reverse Leakage Current | 10 µA max @ VR = 8.4 V - ensures low standby power loss in high-impedance bias networks |
| Surge Current (ISM) | 414 mA peak (½-sine, 1/120 s) - supports transient overvoltage clamping without failure |
| Thermal Resistance | 45°C/W junction-to-lead - enables accurate thermal design when leads serve as primary heat path |
| Operating Temperature | –65°C to +150°C - qualifies for extended-range industrial, aerospace, and under-hood applications |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by a colored band. Leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026. Weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node during regulation; carries full Zener current |
| Cathode | Zener breakdown terminal / regulated output node | Banded end; connected to unregulated input or feedback node; maintains 11 V relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1 W Zener | Fully compliant with JEDEC 1N47xxA series standards for interchangeability and test methodology |
| Plastic P-suffix construction | Lower thermal resistance vs. glass-body (G-suffix) variants-improves power handling in compact layouts |
| RoHS-compliant "e3" plating | Matte-tin termination meets lead-free assembly requirements without compromising solderability |
| Tape-and-reel packaging (TR12) | EIA-296 standard reel format enables automated SMT-compatible placement despite axial-leaded form factor |
| Moisture sensitivity Level 1 | No dry-pack required-reduces handling cost and eliminates bake-out prior to assembly |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Regulates output voltage in isolated flyback or forward converter feedback paths using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Provides precise 11 V Zener reference for TL431-type shunt regulators or discrete op-amp error comparators. Use Value: Enables ±5% output regulation accuracy over line/load/temperature with minimal component count and no external biasing. | Use Scenario: Supplies stable excitation voltage to resistive temperature detectors (RTDs) or strain gauges in PLC analog input modules. IC Role / Device Role / Timing Role: Acts as a low-drift, low-noise voltage reference source for ratiometric measurement front-ends. Use Value: Delivers 11 V reference with 8 Ω dynamic impedance and <10 µA leakage-minimizing self-heating error and common-mode noise coupling. |
| Overvoltage Clamp Protection | Microcontroller I/O Protection |
Use Scenario: Clamps transient surges on 12 V rail inputs (e.g., automotive battery lines or industrial 24 V supplies) before downstream regulators. IC Role / Device Role / Timing Role: Shunts excess energy to ground during >11 V events, limiting peak voltage seen by protected ICs. Use Value: Withstands 414 mA surge current and operates up to +150°C-ensuring robustness against load-dump and inductive kick events. | Use Scenario: Protects GPIO pins of microcontrollers (e.g., STM32, PIC) from ESD and overvoltage in industrial HMI panels. IC Role / Device Role / Timing Role: Functions as a bidirectional clamp (with series resistor) to limit pin voltage to 11 V above ground and ~0.7 V below. Use Value: Nonsensitive to ESD per MIL-STD-750 Method 1020 and rated for –65°C to +150°C-supporting reliable field deployment. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4741A | No "P" suffix (glass body); higher thermal resistance (60°C/W vs. 45°C/W); same electrical specs | Less suitable for high-power-density designs requiring efficient lead-based heat sinking | Select 1N4741CP/TR12 when board space or thermal management favors plastic DO-41 with lower RθJL |
| MMSZ4701T1G | Surface-mount SOD-123 package; 11 V ±5%; 500 mW rating; 10 Ω ZZT; RoHS-compliant | Not interchangeable due to different package, power rating, and thermal profile-requires layout change | Choose MMSZ4701T1G only for space-constrained, automated SMT designs where 1 W dissipation is not required |
Compared with 1N4741A and MMSZ4701T1G, the 1N4741CP/TR12 offers superior thermal performance in through-hole applications and standardized tape-and-reel delivery, while maintaining identical Zener voltage and tolerance-making it optimal for legacy-compatible, thermally demanding, or mixed-technology assemblies.
Availability
1N4741CP/TR12 is available at Aetrix Electronics and suitable for switch-mode power supplies, industrial sensor references, overvoltage clamp protection, and microcontroller I/O protection requiring stable component supply and long-term obsolescence resilience.
Supply support for 1N4741CP/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 timing solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was engineered for ruggedized voltage regulation in mission-critical systems-emphasizing wide temperature operation, MIL-grade screening options, and moisture-insensitive packaging.
FAQ
What is the Zener voltage tolerance of the 1N4741CP/TR12?
The 1N4741CP/TR12 has a Zener voltage tolerance of ±5%, as indicated by the "A" suffix in its JEDEC designation. This means its nominal 11 V Zener voltage is guaranteed between 10.45 V and 11.55 V at 23 mA test current and 25°C lead temperature. The tighter tolerance supports higher-accuracy regulation in feedback and reference circuits compared to non-A-suffix variants.
Does the 1N4741CP/TR12 require dry packing before reflow?
No, the 1N4741CP/TR12 does not require dry packing. It is moisture classified as Level 1 per IPC/JEDEC J-STD-020B, meaning it can be stored indefinitely at ambient conditions without baking. This simplifies handling and eliminates pre-reflow bake cycles-even when used in tape-and-reel (TR12) format for automated assembly.
What is the maximum surge current rating for the 1N4741CP/TR12?
The 1N4741CP/TR12 has a maximum surge current (ISM) rating of 414 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient. This rating applies to transient overvoltage events such as load dump or inductive switching spikes, and is critical for designing robust clamp circuits in automotive and industrial power systems.
How does the "P" suffix in 1N4741CP/TR12 affect thermal performance?
The "P" suffix denotes plastic encapsulation, which reduces thermal resistance to 45°C/W (junction-to-lead at 3/8″ lead length), versus ~60°C/W for glass-body ("G") variants like 1N4741A. This improvement allows the 1N4741CP/TR12 to sustain full 1 W dissipation at higher ambient temperatures or with shorter leads-enhancing reliability in thermally constrained layouts.
Is the 1N4741CP/TR12 RoHS compliant?
Yes, the 1N4741CP/TR12 is RoHS compliant, as confirmed by the "e3" suffix in its full manufacturer part number. It features annealed matte-tin plating on leads, meeting EU RoHS Directive 2011/65/EU and supporting lead-free soldering processes up to 260°C for 10 seconds without degradation.
1N4741CP/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):
- 11 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 8.4 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)
1N4741CP/TR12 FAQ
1.How can I place an order for 1N4741CP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4741CP/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 1N4741CP/TR12 reliable?
The price and inventory of 1N4741CP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4741CP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4741CP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4741CP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4741CP/TR12?
1N4741CP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4741CP/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 1N4741CP/TR12?
For technical support, including 1N4741CP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4741CP/TR12 requirements.
6.How does Aetrix verify that 1N4741CP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4741CP/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 1N4741CP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4741CP/TR12?
All 1N4741CP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4741CP/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 1N4741CP/TR12 part is unused and in its original packaging.
Return procedure for 1N4741CP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4741CP/TR12 Tags
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MMSZ5231B-7-F
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