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Diodes Incorporated 1N4741A-T
- Part No.:
- 1N4741A-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4741A-T.pdf
- Description:
- DIODE ZENER 11V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:5,037
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Product details
Overview
1N4741A-T from Diodes Incorporated is a 1.0 W, 11 V ±5% Zener diode in DO-41 glass package, designed for precision voltage regulation and overvoltage protection in DC power supplies, reference circuits, and voltage clamp applications. It delivers 23 mA test current, 8.0 Ω dynamic impedance at IZT, and exhibits a +0.045 to +0.08 %/°C temperature coefficient.
For engineers reviewing the 1N4741A-T datasheet, 1N4741A-T pinout, 1N4741A-T application, or 1N4741A-T equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (175 °C/W), surge current rating (414 mA, 8.3 ms), reverse leakage (≤5.0 µA at 8.4 V), and RoHS-compliant Sn96.5Ag3.5 termination.
Technical Context
This discrete Zener diode operates in reverse breakdown mode with a sharp knee characteristic verified by dual-point Zener impedance measurement (IZT and IZK). Its glass DO-41 package ensures stable thermal performance up to +175 °C junction temperature and meets UL 94V-0 flammability rating.
Designed for DC stabilization, it maintains regulation under fixed-current biasing (e.g., 23 mA at 11 V) and supports transient suppression via 8.3 ms half-sine surge capability (414 mA). The cathode band polarity marking and 0.35 g mass reflect standardized through-hole assembly compatibility.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11 V nominal, ±5% tolerance - defines regulated output voltage in shunt regulator designs |
| Power Dissipation (Pd) | 1.0 W at 25°C ambient - sets maximum continuous DC power handling before thermal derating |
| Zener Test Current (IZT) | 23 mA - bias point where VZ and ZZT are specified; used for stable reference operation |
| Zener Impedance (ZZT) | 8.0 Ω at IZT - determines regulation stiffness; lower value improves load/line regulation |
| Reverse Leakage (IR) | ≤5.0 µA at 8.4 V - ensures minimal quiescent current in standby or low-power clamp modes |
| Surge Current (IZS) | 414 mA (8.3 ms half-sine) - enables transient overvoltage absorption without failure |
| Temp. Coefficient (αVZ) | +0.045 to +0.08 %/°C - quantifies VZ drift with temperature; critical for precision references |
Pinout & Package
DO-41 glass axial package: hermetically sealed glass body, cathode band marking, Sn96.5Ag3.5 solderable terminations, 0.35 g mass, UL 94V-0 rated.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node in shunt regulation topology |
| Cathode | Reverse breakdown terminal / Zener voltage output node | Connected to input rail; clamps voltage to 11 V when reverse-biased above breakdown |
Key Features
| Feature | Design Value |
|---|---|
| 1.0 W Power Rating | Enables robust voltage clamping in 5–12 V supply rails without external heatsinking |
| ±5% VZ Tolerance | Supports cost-sensitive designs requiring moderate regulation accuracy without trimming |
| DO-41 Glass Construction | Provides high reliability, low leakage, and stable long-term VZ drift under thermal cycling |
| RoHS-Compliant Termination | Sn96.5Ag3.5 finish ensures lead-free reflow compatibility and MIL-STD-202 solderability |
| 175 °C Junction Rating | Allows operation in industrial environments with elevated ambient temperatures |
Applications
| DC Power Supply Regulation | Overvoltage Protection Circuit |
|---|---|
Use Scenario: Stabilizing unregulated 15 V DC input to a clean 11 V reference for analog sensor biasing. IC Role / Device Role / Timing Role: Shunt voltage regulator providing precise, low-drift DC reference. Use Value: Maintains 11 V ±0.55 V across load variations using 23 mA IZT bias, with <8 Ω dynamic impedance limiting output ripple. |
Use Scenario: Clamping transient spikes on a 12 V automotive control bus during load dump events. IC Role / Device Role / Timing Role: Passive overvoltage clamp absorbing 8.3 ms surges up to 414 mA. Use Value: Prevents downstream IC damage by clamping bus voltage to ≤11.6 V (11 V + 5% tolerance) during transients. |
| Fixed-Voltage Reference Source | Signal-Level Voltage Clamp |
Use Scenario: Generating a stable 11 V reference for ADC full-scale calibration in an industrial data logger. IC Role / Device Role / Timing Role: Precision Zener reference with +0.045 to +0.08 %/°C TC for temperature-compensated scaling. Use Value: Limits reference drift to <±0.1 V over –40°C to +85°C ambient, enabling 12-bit accuracy without active compensation. |
Use Scenario: Limiting op-amp output swing to ±11 V in a signal conditioning stage to protect ADC inputs. IC Role / Device Role / Timing Role: Bidirectional clamp (with series diode) restricting analog signal excursion. Use Value: Ensures signal stays within safe input range using low-leakage (<5 µA) reverse blocking below 8.4 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4741A-A | Identical electrical specs; differs only in DO-41 packaging format (ammo pack vs. tape & reel) | No functional difference; selection driven by SMT line feed requirements or manual assembly preference | Choose -A for hand-soldering or small-batch prototyping; -T for automated pick-and-place |
| DFLZ11-7 | Surface-mount SOD-123FL package; 11 V, 5% tolerance; 1.0 W rating; lower RθJA (200 °C/W) | Requires PCB redesign for SMT layout; eliminates axial lead forming but reduces thermal margin in still air | Select for space-constrained boards or high-volume automated assembly where DO-41 footprint is prohibitive |
Compared with 1N4741A-T, the -A variant offers identical performance in a different packaging format, while DFLZ11-7 provides SMT compatibility at the cost of higher thermal resistance and revised board layout requirements.
Availability
1N4741A-T is available at Aetrix Electronics and suitable for DC power supply regulation, overvoltage protection circuits, and fixed-voltage reference source applications requiring stable component supply and long-term obsolescence management.
Supply support for 1N4741A-T 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, industry-qualified components for automotive, industrial, and computing markets.
The 1N47xxA series belongs to Diodes' legacy Zener diode product line, engineered for cost-effective, stable voltage reference and clamping in general-purpose power and signal conditioning circuits.
FAQ
What is the maximum continuous power dissipation for 1N4741A-T at 70°C ambient?
At 70°C ambient, the device must be derated from its 1.0 W rating at 25°C. With a thermal resistance of 175 °C/W and a 45°C temperature rise allowance (70°C − 25°C), the allowable power is 1.0 W × (1 − 45/50) = 0.1 W. Derating follows the linear 6.67 mW/°C slope above 50°C per the datasheet.
How does the +0.045 to +0.08 %/°C temperature coefficient affect regulation accuracy over –40°C to +85°C?
Across this 125°C range, the Zener voltage shift is 11 V × (0.00045 to 0.0008) × 125 = +0.62 V to +1.10 V. Thus, VZ ranges from 11.62 V to 12.10 V at extremes, making it suitable for non-critical references but requiring compensation in precision systems.
Can 1N4741A-T replace 1N4740A in a 10 V reference design?
No - 1N4740A has 10 V nominal VZ, while 1N4741A-T is 11 V. Substituting would raise the regulated voltage by 1 V, potentially exceeding downstream IC absolute maximum ratings. The 1 V difference also alters IZT (25 mA vs. 23 mA) and ZZT (7.0 Ω vs. 8.0 Ω), affecting regulation stability.
Is 1N4741A-T suitable for use in automotive under-hood environments?
Yes - its –65°C to +175°C operating range and DO-41 glass construction meet under-hood thermal and reliability requirements. However, designers must verify that system-level surge profiles (e.g., ISO 7637-2 pulses) fall within the 414 mA, 8.3 ms rating and that PCB layout avoids thermal hotspots exceeding 175°C junction temperature.
1N4741A-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- 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 ~ 175°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4741A-T FAQ
1.How can I place an order for 1N4741A-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4741A-T 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 1N4741A-T reliable?
The price and inventory of 1N4741A-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4741A-T is usually 5 days.
3.What payment methods are accepted for 1N4741A-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4741A-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4741A-T?
1N4741A-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4741A-T 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 1N4741A-T?
For technical support, including 1N4741A-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4741A-T requirements.
6.How does Aetrix verify that 1N4741A-T is sourced from the original manufacturer or authorized distributors?
All 1N4741A-T 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 1N4741A-T meets industry standards.
7.What is the process for return or replacement of 1N4741A-T?
All 1N4741A-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N4741A-T, 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 1N4741A-T part is unused and in its original packaging.
Return procedure for 1N4741A-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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