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onsemi 1N4741ATR
- Part No.:
- 1N4741ATR
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4741ATR.pdf
- Description:
- DIODE ZENER 11V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:15,301
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Product details
Overview
1N4741ATR from ON Semiconductor is a 11 V, 1 W axial-leaded Zener diode in DO-41 glass package, rated for ±5% tolerance, 23 Ω dynamic impedance at 25 mA test current, and 0.25 µA leakage at 8.4 V reverse voltage. It regulates voltage in low-power DC supplies, reference circuits, and overvoltage protection for microcontroller I/O lines.
For engineers reviewing the 1N4741ATR datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (11 V), power dissipation (1 W), thermal derating (6.67 mW/°C above 50°C), operating temperature range (–65°C to +200°C), and DO-41 mechanical compatibility with through-hole PCB layouts.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load or input conditions. Its 11 V nominal Zener voltage is specified at 25 mA test current (IZ), with typical dynamic impedance of 23 Ω and knee impedance of 9 Ω at 0.25 mA (IZK).
The device supports non-repetitive peak reverse surge current up to 414 mA (at 8.3 ms pulse width) and exhibits ≤0.25 µA leakage current at VR = 8.4 V. It is designed for thermal equilibrium at lead temperature TL ≤ 50°C with 3/8″ lead length, per ON Semiconductor's characterization methodology.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.0 V (min 10.45 V, max 11.55 V at IZ = 25 mA; ±5% tolerance) |
| Power Dissipation (PD) | 1.0 W (derates linearly at 6.67 mW/°C above 50°C ambient) |
| Zener Impedance (ZZ) | 23 Ω (measured at IZ = 25 mA; defines regulation stiffness under load variation) |
| Knee Impedance (ZZK) | 9 Ω (measured at IZK = 0.25 mA; indicates low-current regulation capability) |
| Leakage Current (IR) | ≤0.25 µA at VR = 8.4 V (ensures minimal standby power loss in bias/reference circuits) |
| Operating Temperature | –65°C to +200°C (supports industrial, automotive under-hood, and high-reliability applications) |
Pinout & Package
DO-41 glass axial package with cathode indicated by a single color band. Leads are tinned copper-clad steel; 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 | Forward conduction terminal / Reverse-biased reference node | Connected to lower-potential side in Zener regulation; carries reverse current during breakdown |
| Cathode | Zener voltage reference terminal | Marked with color band; connected to higher-potential side; output voltage referenced to this node |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables precise voltage referencing without post-manufacture trimming in cost-sensitive designs |
| 1 W power rating with defined derating | Supports sustained regulation in 12 V rail clamping and feedback divider applications up to 90°C board temperature |
| Low leakage (≤0.25 µA at 8.4 V) | Minimizes error in high-impedance reference dividers and battery-backed monitoring circuits |
| DO-41 mechanical standardization | Ensures compatibility with legacy through-hole assembly equipment and IPC-7351B footprints |
| –65°C to +200°C operating range | Validates use in extended-temperature environments including engine control units and industrial sensors |
Applications
| DC Power Supply Regulation | Microcontroller I/O Protection |
|---|---|
Use Scenario: Stabilizing unregulated 12 V DC input to generate a clean 11 V reference for analog comparators or ADC biasing. IC Role / Device Role / Timing Role: Voltage reference element providing fixed reverse-bias potential to establish stable threshold levels. Use Value: Maintains <±1% output deviation over 10–100 mA load range due to 23 Ω ZZ and 1 W thermal margin. |
Use Scenario: Clamping 5 V logic signals to prevent overvoltage damage to MCU GPIO pins during ESD events or bus contention. IC Role / Device Role / Timing Role: Transient voltage suppressor operating in Zener breakdown to shunt excess energy to ground. Use Value: Limits pin voltage to ≤11.55 V (max VZ) while sustaining 414 mA non-repetitive surge per 8.3 ms pulse. |
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Reference |
Use Scenario: Providing excitation voltage for resistive temperature detectors (RTDs) in 4–20 mA transmitter front-ends. IC Role / Device Role / Timing Role: Precision voltage source establishing known current through sensor bridge. Use Value: Delivers stable 11 V ±0.55 V over –40°C to +125°C ambient via tight tolerance and wide TJ range. |
Use Scenario: Generating a local 11 V reference for LIN transceiver biasing and watchdog timer thresholds in BCM subassemblies. IC Role / Device Role / Timing Role: System-level voltage supervisor ensuring correct logic state initialization during cold crank. Use Value: Operates reliably at –40°C startup and survives 150°C under-hood transient conditions without parameter shift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4741A | Same electrical specs and DO-41 package; differs only in packaging format (ammo pack vs. tape/reel) | No functional difference; identical performance in all circuit roles | Select 1N4741A for manual prototyping or low-volume hand-soldered builds |
| BZX55C11 | Same 11 V ±5%, 500 mW rating, DO-35 package; smaller size, lower power, higher ZZ (30 Ω) | Suitable for space-constrained, low-power signal references but not 1 W load regulation | Choose BZX55C11 when board area is critical and average power < 0.5 W |
Compared with 1N4741ATR, the 1N4741A offers identical performance in a different packaging format, while BZX55C11 trades power handling and impedance for miniaturization-making it viable only where thermal and regulation stiffness requirements are relaxed.
Availability
1N4741ATR is available at Aetrix Electronics and suitable for DC power supply regulation, microcontroller I/O protection, and industrial sensor signal conditioning requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for 1N4741ATR 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N47xxA series was engineered for general-purpose voltage regulation and reference applications, emphasizing reliability, wide temperature operation, and compatibility with legacy through-hole manufacturing infrastructure.
FAQ
What is the Zener voltage tolerance of the 1N4741ATR?
The 1N4741ATR has a nominal Zener voltage of 11.0 V with a guaranteed tolerance of ±5%, meaning the actual measured VZ falls between 10.45 V and 11.55 V when tested at 25 mA. This tolerance is maintained across the full operating temperature range and is verified per ON Semiconductor's 1N4728A–1N4758A datasheet Rev. 8. The 1N4741ATR achieves this consistency using tightly controlled diffusion and metallization processes.
Can the 1N4741ATR be used in surface-mount designs?
No-the 1N4741ATR is exclusively offered in the DO-41 axial-leaded glass package and is not compatible with SMT reflow or pick-and-place processes. For surface-mount equivalents, consider the MMBZ5242B (11 V, SOD-123, 225 mW) or BZX84-C11 (11 V, SOT-23, 300 mW), both of which differ in power rating, impedance, and thermal behavior. The 1N4741ATR requires through-hole mounting with 3/8″ lead length for rated power dissipation.
What is the maximum non-repetitive peak reverse current for the 1N4741ATR?
The 1N4741ATR supports a non-repetitive peak reverse current (IZSM) of 414 mA, defined for an 8.3 ms square-wave pulse per ON Semiconductor's test note 2. This value reflects the device's surge-handling capability during transient overvoltage events such as ESD or load dump, provided the junction temperature remains within limits. Continuous operation must stay within the 1 W DC power envelope.
How does thermal derating apply to the 1N4741ATR?
The 1N4741ATR derates linearly at 6.67 mW/°C above a lead temperature of 50°C, meaning its usable power drops to 0.667 W at 100°C lead temperature. This derating is based on 3/8″ lead length and assumes thermal equilibrium; shorter leads or PCB copper heatsinking alter the effective thermal resistance. Designers must calculate actual lead temperature-not ambient-to apply derating correctly for the 1N4741ATR.
Is the 1N4741ATR RoHS compliant and halogen-free?
Yes-the 1N4741ATR meets RoHS Directive 2011/65/EU and is halogen-free per ON Semiconductor's material declarations. It contains no lead, mercury, cadmium, hexavalent chromium, polybrominated biphenyls (PBB), or polybrominated diphenyl ethers (PBDE). Full compliance documentation, including substance concentration data, is available in ON Semiconductor's official product change notices and environmental reports for the 1N47xxA family.
1N4741ATR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4741ATR FAQ
1.How can I place an order for 1N4741ATR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4741ATR 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 1N4741ATR reliable?
The price and inventory of 1N4741ATR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4741ATR is usually 5 days.
3.What payment methods are accepted for 1N4741ATR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4741ATR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4741ATR?
1N4741ATR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4741ATR 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 1N4741ATR?
For technical support, including 1N4741ATR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4741ATR requirements.
6.How does Aetrix verify that 1N4741ATR is sourced from the original manufacturer or authorized distributors?
All 1N4741ATR 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 1N4741ATR meets industry standards.
7.What is the process for return or replacement of 1N4741ATR?
All 1N4741ATR units undergo pre-shipment inspection (PSI). If there is an issue with 1N4741ATR, 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 1N4741ATR part is unused and in its original packaging.
Return procedure for 1N4741ATR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4741ATR Tags
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