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Taiwan Semiconductor Corporation 1N4751G
- Part No.:
- 1N4751G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4751G.pdf
- Description:
- DIODE ZENER 30V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:2,640
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Product details
Overview
1N4751G from Taiwan Semiconductor is a 1 W, 30 V ±5% Zener diode in DO-41 glass package, designed for precision voltage regulation and reference in low-power DC circuits, with 40 Ω dynamic impedance at 8.5 mA test current and 22.8 V minimum knee voltage.
For engineers reviewing the 1N4751G datasheet, 1N4751G pinout, 1N4751G application, or 1N4751G equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (RθJA = 100 °C/W), junction temperature limit (+200 °C), leakage current (≤5 µA at 22.8 V), and DO-41 mechanical compatibility.
Technical Context
The 1N4751G operates as a single-die, cathode-banded, hermetically sealed glass Zener diode optimized for stable reverse-breakdown regulation under DC bias. It delivers nominal 30 V regulation at IZT = 8.5 mA with ZZT = 40 Ω and exhibits ≤5 µA leakage at VR = 22.8 V.
Its DO-41 package supports manual and automated through-hole assembly, features pure tin-plated leads compliant with J-STD-002, and maintains operation across -65 °C to +200 °C junction temperature range with RθJL = 53.5 °C/W.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ Nominal | 30 V - precise reverse breakdown voltage at 8.5 mA, enabling stable voltage reference in analog and power-supply feedback paths |
| VZ Tolerance | ±5% - ensures predictable regulation window (28.5–31.5 V) without post-manufacture sorting |
| PD | 1 W - maximum continuous power dissipation at 25 °C ambient, defining safe operating area in linear regulator designs |
| ZZT | 40 Ω - low dynamic impedance at IZT, minimizing output voltage variation under load transients |
| IR @ VR | ≤5 µA at 22.8 V - tight leakage specification ensures minimal error current in high-impedance reference nodes |
| TJ Max | +200 °C - high junction temperature rating supports reliability in thermally constrained enclosures or high-ambient environments |
Pinout & Package
DO-41 axial-leaded glass package with cathode indicated by a painted band; leads are pure tin-plated and solderable per J-STD-002. Weight: ~242 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to circuit ground or lower-potential node when used in reverse-biased regulation configuration |
| Cathode | Reverse breakdown terminal / regulated output node | Connected to input supply rail; develops stable 30 V relative to anode during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Hermetically sealed glass construction | Prevents moisture ingress and long-term parameter drift, critical for industrial-grade voltage references |
| ±5% VZ tolerance | Eliminates need for external trimming or binning in cost-sensitive consumer and adapter applications |
| RθJA = 100 °C/W | Enables 1 W operation with modest heatsinking or PCB copper area, simplifying thermal design |
| Cathode band polarity marking | Ensures unambiguous orientation during manual or automated assembly, reducing placement errors |
Applications
| Low-Voltage Stabilizers | On-Board DC/DC Converters |
|---|---|
Use Scenario: Providing stable 30 V bias for op-amp comparators or sensor excitation in battery-powered instrumentation. IC Role / Device Role / Timing Role: Voltage reference element establishing fixed threshold in analog signal conditioning chains. Use Value: Tight ±5% VZ and low 40 Ω ZZT ensure <±150 mV total error over temperature and load, improving measurement accuracy. | Use Scenario: Regulating feedback node voltage in isolated flyback or buck-derived auxiliary supplies. IC Role / Device Role / Timing Role: Primary-side voltage clamp and secondary-side reference stabilizer in multi-rail power architectures. Use Value: 200 °C max junction temperature and 1 W rating support reliable operation under sustained load and elevated ambient conditions. |
| Adapters | Lighting Applications |
Use Scenario: Output voltage stabilization in wall-wart AC/DC adapters powering 24–36 V LED drivers or IoT gateways. IC Role / Device Role / Timing Role: Secondary-side shunt regulator maintaining constant output despite line/load variations. Use Value: DO-41 mechanical robustness and RoHS-compliant tin plating ensure manufacturability and compliance in high-volume adapter production. | Use Scenario: Overvoltage protection and reference setting in constant-current LED string drivers. IC Role / Device Role / Timing Role: Zener clamp limiting gate drive voltage or regulating current-sense amplifier supply rails. Use Value: ≤5 µA leakage at 22.8 V prevents false triggering in high-impedance control loops, enhancing driver stability. |
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 |
|---|---|---|---|
| 1N4751A | Same 30 V nominal, ±5% tolerance, but manufactured by ON Semiconductor in DO-41; RθJA = 110 °C/W vs. 100 °C/W | Identical functional role; slightly higher thermal resistance requires marginally larger copper pour for 1 W operation | Select 1N4751A if sourcing from ON Semi's qualified supply chain; verify thermal layout against derating curves |
| BZX55-C30 | 30 V ±5%, 500 mW rating (vs. 1 W), DO-35 package; ZZT = 30 Ω at 10 mA | Limited to lower-power applications; smaller DO-35 footprint reduces board space but restricts power handling | Choose BZX55-C30 only where power dissipation remains below 500 mW and space constraints outweigh thermal headroom needs |
Compared with 1N4751A and BZX55-C30, the 1N4751G offers superior 1 W power capability and lower thermal resistance in the widely supported DO-41 form factor-making it optimal for industrial adapters and DC/DC converters requiring sustained regulation under load.
Availability
1N4751G is available at Aetrix Electronics and suitable for low-voltage stabilizers, on-board DC/DC converters, and lighting applications requiring stable component supply, consistent Zener voltage tolerance, and RoHS-compliant through-hole assembly.
Supply support for 1N4751G 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 tight tolerances and extended temperature capability for cost-sensitive power management and voltage reference applications.
FAQ
What is the nominal Zener voltage and tolerance of the 1N4751G?
The 1N4751G has a nominal Zener voltage of 30 V with a standard tolerance of ±5%, meaning its actual breakdown voltage falls between 28.5 V and 31.5 V at the specified test current of 8.5 mA. This tolerance is confirmed in the Electrical Specifications table and applies across the full operating temperature range.
What is the maximum power dissipation rating for the 1N4751G?
The 1N4751G is rated for 1 W maximum power dissipation at 25 °C ambient temperature. Derating is required above 25 °C per the thermal resistance specification (RθJA = 100 °C/W), and the device supports continuous operation up to +200 °C junction temperature.
What package type does the 1N4751G use, and how is polarity identified?
The 1N4751G uses the DO-41 axial-leaded glass package. Polarity is clearly marked by a cathode band painted near one end of the glass body; the banded end is the cathode, and the opposite lead is the anode.
What is the Zener impedance (ZZT) of the 1N4751G, and at what test current is it measured?
The 1N4751G has a typical Zener impedance (ZZT) of 40 Ω, measured at the specified Zener test current (IZT) of 8.5 mA. This low dynamic impedance ensures minimal voltage variation under changing load conditions in regulation applications.
Is the 1N4751G RoHS compliant and lead-free?
Yes, the 1N4751G is RoHS compliant and features pure tin-plated leads, meeting J-STD-002 solderability requirements. The "G" suffix in the part number denotes green compound encapsulation and RoHS-conforming materials per Taiwan Semiconductor's G2301 specification.
1N4751G 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):
- 30 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 40 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 22.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
1N4751G FAQ
1.How can I place an order for 1N4751G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4751G 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 1N4751G reliable?
The price and inventory of 1N4751G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4751G is usually 5 days.
3.What payment methods are accepted for 1N4751G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4751G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4751G?
1N4751G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4751G 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 1N4751G?
For technical support, including 1N4751G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4751G requirements.
6.How does Aetrix verify that 1N4751G is sourced from the original manufacturer or authorized distributors?
All 1N4751G 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 1N4751G meets industry standards.
7.What is the process for return or replacement of 1N4751G?
All 1N4751G units undergo pre-shipment inspection (PSI). If there is an issue with 1N4751G, 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 1N4751G part is unused and in its original packaging.
Return procedure for 1N4751G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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