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onsemi 1N4730A_T50R
- Part No.:
- 1N4730A_T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4730A_T50R.pdf
- Description:
- DIODE ZENER 3.9V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:7,604
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Product details
Overview
1N4730A_T50R from ON Semiconductor is a 3.9 V, 1 W axial-leaded Zener diode in DO-41 glass package, rated for ±5% tolerance, 9 mA test current, and 64 Ω dynamic impedance at IZ, used for precision voltage regulation and reference in low-power linear power supplies and analog circuit biasing.
For engineers reviewing the 1N4730A_T50R datasheet, pinout, applications, or equivalent options, key selection criteria include Zener voltage accuracy, thermal derating above 50°C, leakage current at 1 V reverse bias, non-repetitive peak reverse surge capability, and DO-41 mechanical compatibility with through-hole PCB layouts.
Technical Context
The 1N4730A_T50R operates as a silicon planar Zener diode with sharp reverse breakdown at nominal 3.9 V, designed for stable DC voltage reference under regulated current conditions. Its 64 Ω Zener impedance at 9 mA ensures minimal output voltage variation across load changes in shunt regulator configurations.
It features a -65°C to +200°C operating temperature range and 6.67 mW/°C thermal derating above 50°C ambient, enabling reliable use in industrial environments where lead temperature control is maintained per JEDEC standards (3/8″ lead length).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.9 V nominal, ±5% tolerance - defines precise clamping/reference level for 3.3 V–5 V system rails |
| Test Current (IZ) | 9 mA - standard bias point for guaranteed VZ and impedance specification |
| Zener Impedance (ZZ) | 64 Ω at IZ - determines AC ripple rejection and regulation sensitivity in shunt mode |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - sets maximum continuous DC power handling with defined lead thermal path |
| Leakage Current (IR) | 1 μA @ VR = 1 V - ensures minimal quiescent current draw in standby or high-impedance sensing nodes |
| Peak Reverse Surge (IZSM) | 1190 mA (8.3 ms square wave) - supports transient overvoltage suppression without failure |
| Operating Temp Range | -65°C to +200°C - validated for extended industrial and automotive under-hood applications |
Pinout & Package
DO-41 glass axial package with cathode band marking; leads are unmarked anode/cathode terminals requiring visual orientation by color band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common when used in reverse-biased Zener configuration |
| Cathode | Zener breakdown terminal / Regulated output node | Connected to input rail via series resistor; delivers stable 3.9 V to load when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables direct replacement in legacy 3.3 V–5 V reference designs without recalibration |
| 1 W power rating with 6.67 mW/°C derating | Supports robust operation up to 50°C lead temperature before thermal roll-off begins |
| Low 1 μA leakage at 1 V reverse bias | Minimizes error in high-impedance feedback networks and battery-backed circuits |
| 1190 mA non-repetitive peak surge rating | Withstands common ESD and line-transient events without degradation |
| DO-41 glass package with cathode band | Ensures mechanical reliability and consistent hand-soldering or wave-solder process compatibility |
Applications
| Industrial Sensor Signal Conditioning | Legacy Microcontroller Power Rail Clamping |
|---|---|
Use Scenario: Stabilizing reference voltage for 12-bit ADC front-end in temperature transmitters. IC Role / Device Role / Timing Role: Shunt Zener reference providing 3.9 V bias to op-amp instrumentation amplifier stage. Use Value: 64 Ω ZZ and ±5% VZ ensure <±2 LSB offset drift over 0–70°C ambient range. | Use Scenario: Overvoltage protection on 5 V logic supply rail of 8051-based PLC I/O module. IC Role / Device Role / Timing Role: Clamp diode limiting rail excursions during relay coil flyback or ESD events. Use Value: 1190 mA IZSM absorbs 8.3 ms transients without parametric shift or catastrophic failure. |
| Low-Power Analog Voltage Reference | Linear Regulator Feedback Divider Stabilization |
Use Scenario: Generating stable 3.9 V reference for DAC output buffer in portable medical monitor. IC Role / Device Role / Timing Role: Precision shunt reference replacing higher-cost bandgap ICs in cost-sensitive analog subsystems. Use Value: 1 μA IR at 1 V enables >10 MΩ source impedance compatibility without loading error. | Use Scenario: Improving regulation accuracy of LM78L05-based 5 V supply feeding analog sensors. IC Role / Device Role / Timing Role: Zener-connected across lower feedback resistor to compensate for VREF drift. Use Value: Tight 3.9 V ±5% tolerance reduces overall output voltage error to <±1.2% across production lot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4730A (ON Semiconductor) | Same Zener voltage (3.9 V), identical DO-41 package, same ±5% tolerance and 9 mA IZ | No functional difference; T50R suffix denotes tape-and-reel packaging variant only | Select 1N4730A_T50R for automated SMT-compatible assembly; choose bulk 1N4730A for manual prototyping or repair |
| BZX55-C3V9 (Vishay) | 3.9 V ±5%, DO-35 package (smaller glass body), 500 mW rating, 90 Ω ZZ at 5 mA | Lower power rating and higher impedance limit use in high-current or low-noise reference roles | Prefer BZX55-C3V9 only where board space is constrained and 500 mW dissipation suffices |
Compared with 1N4730A_T50R, the base 1N4730A offers identical electrical performance but requires manual handling, while BZX55-C3V9 trades package size and cost for reduced power capability and higher impedance-making 1N4730A_T50R optimal for production-grade 1 W shunt regulation where DO-41 footprint and tape-and-reel logistics are required.
Availability
1N4730A_T50R is available at Aetrix Electronics and suitable for industrial sensor signal conditioning, legacy microcontroller power rail clamping, and low-power analog voltage reference applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant DO-41 packaging.
Supply support for 1N4730A_T50R 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, and sensor solutions for automotive, industrial, and cloud infrastructure markets.
The 1N47xxA series was developed as a standardized family of general-purpose Zener diodes targeting cost-sensitive, high-volume applications requiring reliable voltage regulation and ruggedness in through-hole assembly environments.
FAQ
What is the Zener voltage tolerance of the 1N4730A_T50R?
The 1N4730A_T50R has a Zener voltage tolerance of ±5% around its nominal 3.9 V rating, meaning the actual measured VZ falls between 3.705 V and 4.095 V at 9 mA test current and 25°C ambient. This tolerance is confirmed in the ON Semiconductor 1N4728A–1N4758A datasheet Rev. 8, and applies directly to the 1N4730A_T50R as a tape-and-reel variant of the base 1N4730A device.
Does the 1N4730A_T50R have a specified Zener impedance, and what does it mean for circuit design?
Yes, the 1N4730A_T50R specifies a maximum Zener impedance (ZZ) of 64 Ω at 9 mA test current. This value quantifies how much the output voltage changes with small variations in current-lower ZZ means better regulation. In practice, this allows the 1N4730A_T50R to maintain stable 3.9 V output even with ±1 mA load shifts, making it suitable for precision analog references where ripple rejection matters.
Can the 1N4730A_T50R be used in surface-mount designs?
No-the 1N4730A_T50R uses a DO-41 axial glass package with 0.022" diameter leads intended for through-hole mounting. It is not compatible with standard SMT reflow processes. For surface-mount equivalents, consider SOD-123 or SOD-323 packaged Zeners like MMBZ5227B (3.9 V), but note differences in power rating, impedance, and thermal behavior versus the 1N4730A_T50R.
What is the maximum non-repetitive peak reverse current rating for the 1N4730A_T50R?
The 1N4730A_T50R is rated for a non-repetitive peak reverse current (IZSM) of 1190 mA under an 8.3 ms square-wave surge condition, as specified in the ON Semiconductor datasheet. This rating reflects its ability to absorb short-duration overvoltage transients-such as relay flyback or ESD-without permanent parameter shift, provided the average power remains within 1 W limits.
How does thermal derating apply to the 1N4730A_T50R in real-world PCB layouts?
The 1N4730A_T50R must be derated at 6.67 mW/°C above a lead temperature (TL) of 50°C, assuming 3/8″ lead length per JEDEC standards. In practice, this means its usable power drops to ~0.67 W at 100°C lead temperature. To maintain full 1 W rating, ensure adequate copper pour and airflow around leads-or reduce operating current-especially in enclosed industrial enclosures where ambient exceeds 50°C.
1N4730A_T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 3.9 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 9 Ohms
- Current - Reverse Leakage @ Vr:
- 50 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4730A_T50R FAQ
1.How can I place an order for 1N4730A_T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4730A_T50R 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 1N4730A_T50R reliable?
The price and inventory of 1N4730A_T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4730A_T50R is usually 5 days.
3.What payment methods are accepted for 1N4730A_T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4730A_T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4730A_T50R?
1N4730A_T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4730A_T50R 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 1N4730A_T50R?
For technical support, including 1N4730A_T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4730A_T50R requirements.
6.How does Aetrix verify that 1N4730A_T50R is sourced from the original manufacturer or authorized distributors?
All 1N4730A_T50R 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 1N4730A_T50R meets industry standards.
7.What is the process for return or replacement of 1N4730A_T50R?
All 1N4730A_T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N4730A_T50R, 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 1N4730A_T50R part is unused and in its original packaging.
Return procedure for 1N4730A_T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4730A_T50R Tags
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