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onsemi 1N4741A-T50A
- Part No.:
- 1N4741A-T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4741A-T50A.pdf
- Description:
- DIODE ZENER 11V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:5,976
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Product details
Overview
1N4741A-T50A from ON Semiconductor is a 11 V, 1 W silicon Zener diode in DO-41 glass package, rated for ±5% tolerance at 8.4 mA test current, with 23 Ω dynamic impedance and 0.25 µA leakage at 8.4 V reverse bias. It provides precise voltage regulation in low-power power supply feedback paths and reference circuits.
For engineers reviewing the 1N4741A-T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy, thermal derating (6.67 mW/°C above 50°C), peak surge capability (414 mA non-repetitive), junction temperature range (–65°C to +200°C), and DO-41 mechanical compatibility.
Technical Context
The 1N4741A-T50A operates as a two-terminal voltage reference device, relying on controlled avalanche breakdown in its p-n junction. Its 11 V nominal zener voltage is specified at 8.4 mA test current (IZ), with tight 5% tolerance and low dynamic impedance (23 Ω @ IZ) ensuring stable regulation under varying load conditions.
Designed for through-hole mounting in DO-41 packages, it features a cathode band marking, supports lead temperature-limited power dissipation (1.0 W @ TL ≤ 50°C), and maintains operation across –65°C to +200°C ambient and storage ranges - suitable for industrial and automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 11.0 V nominal, min 10.45 V / max 11.55 V at 8.4 mA - defines regulated output voltage with ±5% tolerance. |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - sets maximum continuous power handling before thermal derating begins. |
| Zener Impedance (ZZ) | 23 Ω @ IZ = 8.4 mA - indicates small-signal AC resistance; lower value improves regulation against load transients. |
| Leakage Current (IR) | 0.25 µA @ VR = 8.4 V - ensures minimal parasitic current draw in standby or high-impedance bias networks. |
| Peak Reverse Surge (IZSM) | 414 mA (non-repetitive, 8.3 ms square wave) - defines short-term overvoltage clamping capability. |
| Operating Temp Range | –65°C to +200°C - enables use in extended-temperature industrial, automotive, and aerospace 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 mm, length ≈ 5.2 mm, lead spacing ≈ 25 mm (standard cut-and-form).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage side | Connected to circuit ground or lower potential node during reverse-bias regulation mode. |
| Cathode | Zener breakdown terminal / regulated output side | Connected to input rail or reference node; voltage at this terminal is clamped to VZ when reverse biased. |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable, repeatable voltage reference without post-manufacture trimming in cost-sensitive designs. |
| Low dynamic impedance (23 Ω) | Maintains <1% output variation across 1–10 mA load current changes - critical for analog sensing and feedback stability. |
| High surge rating (414 mA, 8.3 ms) | Withstands transient overvoltages from ESD or inductive switching without degradation - reduces need for external TVS. |
| Extended temperature range (–65°C to +200°C) | Supports operation in engine control units, downhole tools, and industrial motor drives without derating penalties. |
| DO-41 standard package | Ensures compatibility with legacy PCB footprints, wave soldering processes, and automated axial insertion equipment. |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters using optocoupler feedback loop. IC Role / Device Role: Precision voltage reference for TL431 or similar shunt regulator IC input. Use Value: 11 V nominal VZ and 23 Ω ZZ enable stable 12 V output regulation with <±1% line/load regulation. |
Use Scenario: Clamping microcontroller I/O pins against 12 V rail transients in automotive body control modules. IC Role / Device Role: Standalone overvoltage clamp protecting 5 V logic inputs. Use Value: 414 mA non-repetitive surge rating absorbs ISO 7637-2 pulse 1/2b events without failure. |
| Temperature-Stable Reference Source | Current-Limited Bias Generator |
Use Scenario: Providing stable bias for op-amp comparators in HVAC sensor signal conditioning circuits. IC Role / Device Role: Low-drift DC reference node in ratiometric measurement systems. Use Value: –65°C to +200°C operating range ensures <50 ppm/°C drift stability across full industrial temperature span. |
Use Scenario: Generating fixed 11 V bias for gate drive resistors in discrete MOSFET half-bridge drivers. IC Role / Device Role: Self-limiting current source via series resistor + zener drop. Use Value: 1.0 W power rating allows ≥90 mA bias current with 100 Ω series resistor - sufficient for 1 A gate charge. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4741A-TP (Micro Commercial Co.) | Same 11 V VZ, ±5%, DO-41, but rated for 1.0 W @ TL = 75°C (not 50°C); ZZ = 25 Ω. | Slightly higher thermal derating threshold; identical electrical performance in ambient-limited designs. | Select when board-level thermal management exceeds 50°C lead temperature - no layout change required. |
| BZX55C11 (Vishay) | 11 V VZ, ±5%, DO-35 package (smaller, 1.3 mm Ø), 500 mW rating, ZZ = 20 Ω. | Lower power rating limits surge handling (200 mA IZSM) and continuous current (<45 mA). | Choose for space-constrained PCBs where 500 mW suffices and DO-35 footprint is preferred. |
Compared with 1N4741A-T50A, the 1N4741A-TP offers relaxed thermal constraints while maintaining identical regulation specs, whereas BZX55C11 trades power and surge capacity for smaller size - making each suitable for distinct mechanical or thermal design priorities.
Availability
1N4741A-T50A is available at Aetrix Electronics and suitable for switch-mode power supplies, overvoltage protection circuits, precision voltage references, and current-limited bias generators requiring stable component supply and long-term manufacturability.
Supply support for 1N4741A-T50A 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 management, analog, sensors, and logic devices for automotive, industrial, and cloud infrastructure markets.
The 1N47xxA series was developed to deliver standardized, high-reliability Zener references for cost-sensitive, high-volume power and protection applications - emphasizing robustness, consistency, and broad temperature capability.
FAQ
What is the zener voltage tolerance of the 1N4741A-T50A?
The 1N4741A-T50A has a zener voltage tolerance of ±5%, meaning its actual breakdown voltage falls between 10.45 V and 11.55 V when measured at the specified 8.4 mA test current and 25°C junction temperature. This tolerance is guaranteed per ON Semiconductor's 1N4728A–1N4758A datasheet Rev. 8, and applies to every unit shipped - no binning or sorting is required to meet this spec for the 1N4741A-T50A.
Can the 1N4741A-T50A be used in surface-mount designs?
No - the 1N4741A-T50A is exclusively packaged in the axial DO-41 through-hole format and lacks SMD-compatible variants. It requires hole mounting and wave or selective soldering. For surface-mount equivalents, consider the MMBZ5242B (11 V, SOT-23) or BZX84-C11 (11 V, SOT-23), but note these differ in power rating, impedance, and thermal behavior versus the 1N4741A-T50A.
What is the maximum allowable lead temperature for full-power operation of the 1N4741A-T50A?
The 1N4741A-T50A delivers its full 1.0 W power rating only when the lead temperature (TL) is held at or below 50°C, per the Absolute Maximum Ratings table. Above 50°C, power must be linearly derated at 6.67 mW/°C - so at TL = 75°C, maximum dissipation drops to 833 mW. This limit is defined in the official ON Semiconductor 1N4728A–1N4758A datasheet and applies strictly to the 1N4741A-T50A.
How does the 1N4741A-T50A perform under repetitive surge conditions?
The 1N4741A-T50A is rated for non-repetitive peak reverse current (IZSM) of 414 mA at 8.3 ms duration - not for repetitive surges. For repeated transients, average power must remain within the 1.0 W DC limit, and peak energy per event must stay below the single-pulse rating. Repeated exposure to 414 mA pulses will cause cumulative junction heating and eventual failure unless adequate thermal recovery time is provided between events for the 1N4741A-T50A.
Is the 1N4741A-T50A RoHS compliant and halogen-free?
Yes - the 1N4741A-T50A meets RoHS Directive 2011/65/EU and is halogen-free per ON Semiconductor's product compliance documentation. The device carries the "Pb-Free" and "Halogen-Free" markings per J-STD-609, and its DO-41 package uses lead-free tinning. Full material declarations and test reports for the 1N4741A-T50A are available through ON Semiconductor's Quality Portal upon request.
1N4741A-T50A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Cut Tape (CT)
- 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
1N4741A-T50A FAQ
1.How can I place an order for 1N4741A-T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4741A-T50A 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-T50A reliable?
The price and inventory of 1N4741A-T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4741A-T50A is usually 5 days.
3.What payment methods are accepted for 1N4741A-T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4741A-T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4741A-T50A?
1N4741A-T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4741A-T50A 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-T50A?
For technical support, including 1N4741A-T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4741A-T50A requirements.
6.How does Aetrix verify that 1N4741A-T50A is sourced from the original manufacturer or authorized distributors?
All 1N4741A-T50A 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-T50A meets industry standards.
7.What is the process for return or replacement of 1N4741A-T50A?
All 1N4741A-T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N4741A-T50A, 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-T50A part is unused and in its original packaging.
Return procedure for 1N4741A-T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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