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onsemi 1N4736A-T50A
- Part No.:
- 1N4736A-T50A
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4736A-T50A.pdf
- Description:
- DIODE ZENER 6.8V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:8,477
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Product details
Overview
1N4736A-T50A from ON Semiconductor is a 6.8 V, 1.0 W axial-leaded Zener diode in DO-41 glass package, rated for ±5% tolerance, 3.5 Ω dynamic impedance at 37 mA test current, and 10 μA leakage at 5.4 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 1N4736A-T50A datasheet, pinout, applications, or equivalent options, key selection criteria include zener voltage accuracy, thermal derating (6.67 mW/°C above 50°C), junction temperature range (–65°C to +200°C), and DO-41 mechanical compatibility with through-hole PCB layouts.
Technical Context
The 1N4736A-T50A operates as a silicon planar Zener diode optimized for stable voltage regulation in discrete analog and power management circuits. Its 6.8 V nominal breakdown voltage is specified at 37 mA test current (IZ), with typical dynamic impedance of 3.5 Ω and knee impedance of 400 Ω at 0.25 mA (IZK).
It meets industrial-grade reliability requirements with –65°C to +200°C operating and storage temperature range, 1.0 W power dissipation at TL ≤ 50°C (3/8″ lead length), and non-repetitive peak reverse surge current rating of 660 mA (8.3 ms square wave).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.8 V nominal, min 6.46 V / max 7.14 V at 37 mA - defines regulated output voltage under standard test conditions |
| Power Dissipation (PD) | 1.0 W at TL ≤ 50°C - sets maximum continuous power handling with 3/8″ leads; derates 6.67 mW/°C above 50°C |
| Zener Impedance (ZZ) | 3.5 Ω at IZ = 37 mA - indicates low AC resistance for stable regulation under dynamic load changes |
| Knee Impedance (ZZK) | 400 Ω at IZK = 0.25 mA - characterizes impedance near breakdown threshold, relevant for low-current biasing |
| Leakage Current (IR) | 10 μA max at VR = 5.4 V - ensures minimal standby current in reverse-biased standby or sensing applications |
| Operating Temperature | –65°C to +200°C - supports deployment in automotive engine compartments and industrial control enclosures |
Pinout & Package
DO-41 glass axial package with cathode band marking; two-terminal device requiring no orientation-specific PCB footprint beyond standard DO-41 hole spacing (typical lead diameter 0.51 mm, body diameter 2.2 mm, length 5.2 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower-potential node when used in reverse-bias regulation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to input voltage source; output voltage referenced to anode; marked by color band |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive consumer and industrial designs |
| Low dynamic impedance (3.5 Ω) | Minimizes output voltage variation under load transients, improving stability in feedback references |
| High surge current capability (660 mA) | Withstands brief overvoltage events such as ESD or inductive kickback without degradation |
| Wide temperature range (–65°C to +200°C) | Supports operation in extreme environments including under-hood automotive and factory-floor PLC modules |
Applications
| DC Power Supply Regulation | Microcontroller I/O Protection |
|---|---|
Use Scenario: Stabilizing unregulated 9–12 V wall adapter outputs to fixed 6.8 V for analog sensor biasing. IC Role / Device Role / Timing Role: Voltage reference and shunt regulator, clamping excess voltage to protect downstream op-amps. Use Value: Maintains <±2% output deviation across 1–37 mA load range due to low ZZ and tight VZ tolerance. |
Use Scenario: Clamping 3.3 V MCU GPIO pins against accidental 5 V misconnection or ESD spikes. IC Role / Device Role / Timing Role: Reverse-biased transient voltage suppressor, conducting only above 6.8 V breakdown. Use Value: Limits pin voltage to safe level while drawing <10 μA at normal 3.3 V operation, avoiding signal interference. |
| Industrial Sensor Reference | Legacy Analog Meter Calibration |
Use Scenario: Providing precision 6.8 V reference for 12-bit ADC front-end in pressure transducer signal conditioning. IC Role / Device Role / Timing Role: Stable DC reference source with low thermal drift (<0.05%/°C typical) over –40°C to +85°C. Use Value: Enables <0.5 LSB error contribution from reference drift, meeting industrial accuracy class requirements. |
Use Scenario: Calibrating analog panel meters in HVAC control panels using fixed-voltage shunt regulation. IC Role / Device Role / Timing Role: Passive voltage standard replacing potentiometer-based adjustments in field-serviceable instruments. Use Value: Eliminates calibration drift from mechanical wear; maintains ±5% accuracy over 10+ years of thermal cycling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4736A (DO-41, no -T50A suffix) | Identical electrical specs; -T50A denotes tape-and-reel packaging per EIA-481-D standard, not performance difference | No functional difference; -T50A enables automated SMT placement despite axial form factor | Select 1N4736A-T50A for pick-and-place assembly; use bulk 1N4736A for hand-soldered prototypes |
| BZX55C6V8 (DO-35) | Same 6.8 V / ±5% / 500 mW rating; smaller DO-35 package, higher ZZ (10 Ω), lower surge rating (350 mA) | Limited to lower-power, space-constrained designs; unsuitable for 1 W continuous dissipation or high-surge environments | Choose BZX55C6V8 only when board area is critical and power/thermal demands are ≤500 mW |
Compared with 1N4736A-T50A, the base 1N4736A offers identical regulation performance but lacks tape-and-reel logistics support, while BZX55C6V8 trades power handling and surge robustness for miniaturization-making 1N4736A-T50A optimal for industrial-grade 1 W shunt regulation with automated assembly readiness.
Availability
1N4736A-T50A is available at Aetrix Electronics and suitable for DC power supply regulation, microcontroller I/O protection, industrial sensor reference, and legacy analog meter calibration requiring stable component supply and long-term manufacturability.
Supply support for 1N4736A-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 (now onsemi) is a global semiconductor supplier specializing in energy-efficient power, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The 1N47xxA series was designed as a general-purpose, high-reliability Zener diode family for cost-effective voltage regulation and protection in industrial and consumer electronics, emphasizing wide temperature operation and consistent parametric distribution.
FAQ
What is the Zener voltage tolerance of the 1N4736A-T50A?
The 1N4736A-T50A has a nominal Zener voltage of 6.8 V with a tolerance of ±5%, meaning its actual breakdown voltage falls between 6.46 V and 7.14 V when measured at 37 mA test current and 25°C. This tolerance is guaranteed per ON Semiconductor's 1N4728A–1N4758A datasheet Rev. 8, and applies to every unit regardless of packaging variant including the 1N4736A-T50A.
Can the 1N4736A-T50A be used in surface-mount applications?
The 1N4736A-T50A is packaged in DO-41 axial glass, which is inherently through-hole-but its -T50A suffix indicates EIA-481-D tape-and-reel packaging compatible with automated pick-and-place machines equipped with axial component feeders. It is not a surface-mount device (SMD), but can be placed automatically in through-hole processes; manual soldering or wave soldering remains standard.
What is the maximum power dissipation for the 1N4736A-T50A at 75°C ambient?
At 75°C ambient, the 1N4736A-T50A must be derated from its full 1.0 W rating. With a derating factor of 6.67 mW/°C above 50°C, the allowable power drops by (75 − 50) × 6.67 mW = 166.75 mW, resulting in a maximum dissipation of 833 mW. This assumes 3/8″ lead length and proper PCB copper thermal relief per ON Semiconductor's absolute maximum ratings table.
How does the 1N4736A-T50A compare to the 1N4736A in terms of electrical performance?
The 1N4736A-T50A and 1N4736A share identical electrical specifications-including Zener voltage, impedance, leakage, and temperature ratings-because the -T50A suffix denotes only packaging format (tape-and-reel) and not a different die or bin. Both meet the same ON Semiconductor 1N4728A–1N4758A specification, and performance differences are nonexistent outside of logistics handling.
Is the 1N4736A-T50A suitable for automotive under-hood applications?
Yes-the 1N4736A-T50A is rated for junction temperatures from –65°C to +200°C and has been qualified for industrial environments. Its DO-41 glass package and silicon construction withstand thermal cycling and vibration common in engine bay locations, provided PCB layout provides adequate thermal relief and voltage derating aligns with under-hood ambient extremes (e.g., >105°C).
1N4736A-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):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 3.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 4 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4736A-T50A FAQ
1.How can I place an order for 1N4736A-T50A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4736A-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 1N4736A-T50A reliable?
The price and inventory of 1N4736A-T50A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4736A-T50A is usually 5 days.
3.What payment methods are accepted for 1N4736A-T50A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4736A-T50A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4736A-T50A?
1N4736A-T50A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4736A-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 1N4736A-T50A?
For technical support, including 1N4736A-T50A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4736A-T50A requirements.
6.How does Aetrix verify that 1N4736A-T50A is sourced from the original manufacturer or authorized distributors?
All 1N4736A-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 1N4736A-T50A meets industry standards.
7.What is the process for return or replacement of 1N4736A-T50A?
All 1N4736A-T50A units undergo pre-shipment inspection (PSI). If there is an issue with 1N4736A-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 1N4736A-T50A part is unused and in its original packaging.
Return procedure for 1N4736A-T50A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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