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Microchip Technology 1N4741P/TR8
- Part No.:
- 1N4741P/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4741P/TR8.pdf
- Description:
- DIODE ZENER 11V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,311
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Product details
Overview
1N4741P/TR8 from Microsemi is a 1 W, 11 V ±5% axial-lead silicon Zener diode in DO-41 plastic package, designed for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation across industrial and embedded systems.
For engineers reviewing the 1N4741P/TR8 datasheet, 1N4741P/TR8 pinout, 1N4741P/TR8 application, or 1N4741P/TR8 equivalent, key selection criteria include its 11 V nominal Zener voltage at 23 mA test current, 8 Ω dynamic impedance, 0.25 A maximum regulator current at 50°C, and RoHS-compliant matte-tin plating with moisture sensitivity level 1.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable output voltage under varying load and temperature conditions. It features a sharp knee characteristic verified by dual-point Zener impedance measurement per MicroNote 202, with thermal resistance of 45°C/W junction-to-lead (3/8" lead length) and 105°C/W junction-to-ambient on FR4 board.
The device uses void-free UL94V-0 epoxy encapsulation and tin-lead or RoHS-compliant annealed matte-tin terminals. Polarity is marked by cathode band; regulation requires cathode-positive bias relative to anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V ±5% at IZT = 23 mA - defines regulated output voltage tolerance in feedback networks |
| Power Dissipation | 1.0 W at TL < 105°C - sets maximum steady-state thermal load on PCB trace or heatsink |
| Dynamic Impedance (ZZT) | 8 Ω at IZT = 23 mA - determines output voltage variation under load transients |
| Max Regulator Current (IZM) | 0.25 A at TA = 50°C - limits usable current range before thermal derating begins |
| Reverse Leakage (IR) | 5 μA at VR = 8.4 V - ensures minimal quiescent current in standby protection circuits |
| Thermal Resistance | 45°C/W junction-to-lead - enables accurate thermal modeling when leads serve as heat paths |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by colored band; body diameter 2.0–2.7 mm, overall length 4.5–5.5 mm, lead diameter 0.4–0.6 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential node; carries full regulator current during operation |
| Cathode | Regulated output terminal | Banded end; held at stable 11 V above anode when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered construction | Fully compliant with 1N47xxA series mechanical and electrical standards for interchangeability |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies SMT handling and eliminates bake-out prior to assembly |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - supports robust handling in uncontrolled environments |
| RoHS-compliant option | e3 suffix denotes annealed matte-tin plating - meets environmental compliance without solderability trade-offs |
Applications
| Power Supply Feedback Regulation | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Stabilizing output voltage in linear regulators or switching converter feedback paths. IC Role / Device Role / Timing Role: Zener reference element providing precise 11 V threshold for error amplifier comparison. Use Value: Maintains ±5% output accuracy over -65°C to +150°C ambient with 8 Ω dynamic impedance limiting load-induced drift. | Use Scenario: Limiting transient voltage spikes on DC rails to protect downstream ICs. IC Role / Device Role / Timing Role: Shunt clamping device diverting excess energy to ground when rail exceeds 11 V. Use Value: Responds within nanoseconds to surges up to 0.25 A peak, preventing latch-up or damage to 3.3 V/5 V logic interfaces. |
| Voltage Reference Source | Current Source Biasing |
Use Scenario: Generating stable bias voltages for op-amp comparators or ADC references. IC Role / Device Role / Timing Role: Low-drift 11 V reference node with 0.01%/°C tempco near 10 V range. Use Value: Delivers <5 μA leakage at 8.4 V, enabling high-impedance reference networks with minimal loading error. | Use Scenario: Setting constant current for LED drivers or sensor excitation circuits. IC Role / Device Role / Timing Role: Fixed-voltage drop element establishing IOUT = (VZ − VBE)/R in transistor-based current sources. Use Value: Sharp knee and low ZZT ensure stable current setpoint across supply variations and temperature shifts. |
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 TR8 tape-and-reel packaging; bulk or ammo pack only | Lacks standardized reel format for automated placement | Select 1N4741P/TR8 for SMT line compatibility; use 1N4741A for manual prototyping or low-volume repair |
| BZX55C11 | 500 mW rating, 11 V ±5%, DO-35 package - lower power and smaller footprint | Not suitable for >0.125 W continuous dissipation or high-surge scenarios | Choose BZX55C11 where space-constrained designs tolerate reduced surge margin and thermal capacity |
Compared with 1N4741A and BZX55C11, the 1N4741P/TR8 provides higher power handling (1 W vs. 0.5 W), standardized tape-and-reel delivery for pick-and-place, and superior thermal resistance (45°C/W vs. ~120°C/W typical for DO-35), making it optimal for production-grade power regulation.
Availability
1N4741P/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and medical instrumentation requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4741P/TR8 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 engineered for ruggedized voltage regulation in mission-critical power systems, emphasizing thermal stability, ESD immunity, and JEDEC-standardized interchangeability across military and commercial applications.
FAQ
What is the Zener voltage tolerance of the 1N4741P/TR8?
The 1N4741P/TR8 has a nominal Zener voltage of 11 V with a ±5% tolerance, as indicated by the "A" suffix in its JEDEC designation. This means the actual measured VZ falls between 10.45 V and 11.55 V when tested at 23 mA and 25°C lead temperature. The tolerance remains valid across the full operating temperature range of –65°C to +150°C.
Does the 1N4741P/TR8 require baking before reflow soldering?
No, the 1N4741P/TR8 does not require baking prior to reflow. Its moisture sensitivity level is rated IPC/JEDEC J-STD-020B Level 1, meaning it can be stored indefinitely at ≤30°C/60% RH without dry-packaging or moisture barrier bags. This eliminates pre-reflow bake cycles and reduces manufacturing overhead.
What is the maximum surge current rating for the 1N4741P/TR8?
The 1N4741P/TR8 has a maximum non-repetitive surge current (ISM) of 414 mA, measured using a ½ sine-wave pulse of 1/120 second duration at 25°C ambient. This rating applies only to short-duration transients; sustained current must remain below 0.25 A at 50°C ambient to avoid thermal runaway.
Can the 1N4741P/TR8 replace the 1N4741A in existing designs?
Yes, the 1N4741P/TR8 is a direct functional and mechanical replacement for the 1N4741A, sharing identical electrical specs, DO-41 package dimensions, and polarity marking. The "P" denotes plastic construction (vs. glass "G"), and "TR8" indicates EIA-296-compliant 8 mm tape-and-reel packaging - no PCB layout changes are needed.
Is the 1N4741P/TR8 RoHS compliant?
Yes, the 1N4741P/TR8 is RoHS compliant, as confirmed by the "e3" suffix in Microsemi's official documentation. It features annealed matte-tin plating per MIL-STD-750 Method 2026 and meets all substance restrictions under Directive 2011/65/EU, including lead content below 1000 ppm.
1N4741P/TR8 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:
- ±10%
- 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)
1N4741P/TR8 FAQ
1.How can I place an order for 1N4741P/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4741P/TR8 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 1N4741P/TR8 reliable?
The price and inventory of 1N4741P/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4741P/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4741P/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4741P/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4741P/TR8?
1N4741P/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4741P/TR8 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 1N4741P/TR8?
For technical support, including 1N4741P/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4741P/TR8 requirements.
6.How does Aetrix verify that 1N4741P/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4741P/TR8 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 1N4741P/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4741P/TR8?
All 1N4741P/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4741P/TR8, 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 1N4741P/TR8 part is unused and in its original packaging.
Return procedure for 1N4741P/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4741P/TR8 Tags
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BZT52C5V6T-7
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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