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Taiwan Semiconductor Corporation 1N4731G R0G
- Part No.:
- 1N4731G R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4731G R0G.pdf
- Description:
- DIODE ZENER 4.3V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,145
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Product details
Overview
1N4731G R0G from Taiwan Semiconductor is a 1 W, 4.3 V ±5% Zener diode in DO-41 glass package, designed for precision voltage regulation and low-power reference applications in DC/DC converters, lighting circuits, and AC/DC adapters. It features 9 Ω dynamic impedance at 58 mA test current, 10 µA leakage at 1 V reverse bias, and operates across –65°C to +200°C junction temperature range.
For engineers reviewing the 1N4731G R0G datasheet, 1N4731G R0G pinout, 1N4731G R0G application, or 1N4731G R0G equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (RθJA = 100°C/W), power derating above 50°C, cathode-band polarity marking, and compatibility with J-STD-002 solderable tin-plated leads.
Technical Context
This discrete Zener diode operates in reverse breakdown mode to maintain stable voltage under varying load and line conditions. Its 4.3 V nominal Zener voltage is specified at 58 mA test current (IZT), with 9 Ω dynamic impedance (ZZT) ensuring tight regulation in low-noise reference paths.
The DO-41 hermetically sealed glass package provides robust thermal performance (RθJL = 53.5°C/W) and long-term stability in industrial environments. Polarity is unambiguously indicated by a cathode band, and the device complies with RoHS without lead or halogen exemptions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ Nominal | 4.3 V - precise regulation point for low-voltage reference circuits |
| VZ Tolerance | ±5% - ensures predictable clamping within 4.09–4.51 V at IZT |
| PD | 1 W - maximum continuous power dissipation at 25°C ambient |
| IZT | 58 mA - test current where VZ and ZZT are guaranteed |
| ZZT | 9 Ω - low dynamic impedance enables stable output under small-signal load variation |
| IR @ VR | 10 µA @ 1 V - minimal leakage preserves efficiency in battery-powered standby circuits |
| TJ Range | –65°C to +200°C - supports operation in automotive under-hood and industrial control environments |
Pinout & Package
DO-41 axial-leaded glass package with cathode indicated by a single black band. Leads are pure tin-plated and compliant with J-STD-002 solderability requirements. Device weight is approximately 242 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in shunt regulator | Connected to circuit ground or lower potential node when used as voltage clamp |
| Cathode | Reverse breakdown terminal / regulated output node | Marked with black band; supplies stable 4.3 V reference to load when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Prevents moisture ingress and parameter drift over time, critical for long-life industrial references |
| ±5% Zener voltage tolerance | Reduces need for post-production trimming in cost-sensitive consumer power supplies |
| Low ZZT (9 Ω) | Minimizes output voltage deviation under ±10 mA load transients in feedback networks |
| J-STD-002 solderable leads | Ensures reliable reflow and hand-solder joint integrity without pre-tinning or flux adjustment |
| RoHS-compliant green compound | Meets EU Directive 2011/65/EU without exemptions, supporting environmental compliance reporting |
Applications
| LED Driver Reference | AC/DC Adapter Feedback |
|---|---|
Use Scenario: Stabilizing bias voltage for constant-current LED driver ICs in commercial lighting fixtures. IC Role / Device Role / Timing Role: Shunt voltage reference providing 4.3 V setpoint to error amplifier input. Use Value: Tight ±5% VZ and low 9 Ω ZZT ensure consistent LED brightness across input voltage variations. | Use Scenario: Secondary-side voltage sensing in isolated flyback adapters for consumer electronics. IC Role / Device Role / Timing Role: Zener clamp defining optocoupler LED forward voltage in TL431-based feedback loops. Use Value: 10 µA leakage at 1 V prevents false triggering during no-load standby mode. |
| On-board DC/DC Converter | Low-Voltage Microcontroller Reset |
Use Scenario: Generating clean 4.3 V rail for analog peripherals in embedded microcontrollers. IC Role / Device Role / Timing Role: Passive voltage reference for ADC reference buffer or DAC output stage. Use Value: 100°C/W RθJA allows direct PCB mounting without heatsinking in space-constrained modules. | Use Scenario: Brown-out detection circuit for 3.3 V microcontrollers requiring reset below 4.0 V. IC Role / Device Role / Timing Role: Threshold detector using 4.3 V Zener drop to trigger external reset IC or GPIO. Use Value: Cathode-band polarity marking eliminates assembly errors in high-volume SMT production. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4731A | Same 4.3 V nominal VZ, ±5% tolerance, but packaged in DO-41 with legacy "A" suffix and non-RoHS plating | Not suitable for new RoHS-compliant designs; requires lead-free process validation | Select 1N4731G R0G for certified green manufacturing and J-STD-002 solderability |
| BZX55-C4V3 | 4.3 V ±5%, 500 mW rating, DO-35 package - lower power and smaller footprint | Limited to sub-500 mW reference loads; unsuitable for 1 W continuous dissipation | Choose 1N4731G R0G when full 1 W capability and DO-41 mechanical robustness are required |
Compared with 1N4731A and BZX55-C4V3, the 1N4731G R0G delivers verified 1 W power handling, RoHS-compliant tin plating, and tighter thermal resistance specification - making it the preferred choice for industrial-grade voltage references demanding long-term stability and process compatibility.
Availability
1N4731G R0G is available at Aetrix Electronics and suitable for LED driver reference, AC/DC adapter feedback, and on-board DC/DC converter applications requiring stable component supply, consistent Zener voltage tolerance, and RoHS-compliant packaging.
Supply support for 1N4731G R0G 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, rectifiers, and Zener diodes for industrial and consumer markets.
The 1N47xxG series was developed to deliver high-reliability, glass-encapsulated Zener references with extended temperature range and standardized DO-41 form factor for global power supply design reuse.
FAQ
What is the exact Zener voltage and tolerance of the 1N4731G R0G?
The 1N4731G R0G has a nominal Zener voltage of 4.3 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 4.09 V and 4.51 V when tested at 58 mA (IZT). This tolerance is guaranteed per Taiwan Semiconductor's G2301 specification revision and applies across the full operating temperature range.
Does the 1N4731G R0G meet RoHS requirements?
Yes, the 1N4731G R0G uses green compound encapsulation and pure tin-plated leads, fully complying with EU Directive 2011/65/EU (RoHS). No lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE substances exceed threshold limits, and the device carries no exemption codes.
What is the maximum power dissipation and thermal resistance of the 1N4731G R0G?
The 1N4731G R0G has a maximum power dissipation (PD) of 1 W at 25°C ambient, derating linearly above 50°C. Its junction-to-ambient thermal resistance (RθJA) is 100°C/W, and junction-to-lead (RθJL) is 53.5°C/W - values confirmed in the official G2301 datasheet absolute maximum ratings table.
How is polarity marked on the 1N4731G R0G?
Polarity is indicated by a single black cathode band located near one end of the DO-41 glass body. The banded end is the cathode; the opposite lead is the anode. This marking is visible under standard visual inspection and aligns with JEDEC DO-41 mechanical standards.
What are the soldering requirements for the 1N4731G R0G?
The 1N4731G R0G features pure tin-plated leads qualified per J-STD-002 for both wave and reflow soldering. Peak reflow temperature must not exceed 260°C for ≤10 seconds, and board-level thermal profiles must avoid exceeding 200°C junction temperature during assembly.
1N4731G R0G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 4.3 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 9 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
1N4731G R0G FAQ
1.How can I place an order for 1N4731G R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4731G R0G 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 1N4731G R0G reliable?
The price and inventory of 1N4731G R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4731G R0G is usually 5 days.
3.What payment methods are accepted for 1N4731G R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4731G R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4731G R0G?
1N4731G R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4731G R0G 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 1N4731G R0G?
For technical support, including 1N4731G R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4731G R0G requirements.
6.How does Aetrix verify that 1N4731G R0G is sourced from the original manufacturer or authorized distributors?
All 1N4731G R0G 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 1N4731G R0G meets industry standards.
7.What is the process for return or replacement of 1N4731G R0G?
All 1N4731G R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1N4731G R0G, 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 1N4731G R0G part is unused and in its original packaging.
Return procedure for 1N4731G R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4731G R0G Tags
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