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Taiwan Semiconductor Corporation 1N4758G R0G
- Part No.:
- 1N4758G R0G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4758G R0G.pdf
- Description:
- DIODE ZENER 56V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,676
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Product details
Overview
1N4758G R0G from Taiwan Semiconductor is a 1 W, 56 V ±5% Zener diode in DO-41 glass package, designed for precision voltage regulation and reference applications in low-power DC/DC converters, lighting circuits, and AC/DC adapters. It delivers stable reverse breakdown at 56 V with 4.5 mA test current, 110 Ω dynamic impedance, and operates up to +200 °C junction temperature.
For engineers reviewing the 1N4758G R0G datasheet, 1N4758G R0G pinout, 1N4758G R0G application, or 1N4758G R0G equivalent, key selection factors include its ±5% Zener tolerance, 110 Ω Zener impedance at 4.5 mA, DO-41 mechanical compatibility, hermetic glass sealing, and RoHS-compliant tin-plated leads.
Technical Context
This discrete Zener diode functions as a two-terminal voltage reference device operating in reverse-biased avalanche breakdown mode. Its 56 V nominal Zener voltage is specified at 4.5 mA test current (IZT), with 110 Ω dynamic impedance (ZZT) and 2000 Ω knee impedance (ZZK) measured at 0.25 mA (IZK).
The device features a maximum power dissipation of 1 W at 25 °C ambient, derating linearly above 50 °C, and supports junction temperatures from –65 °C to +200 °C. Thermal resistance from junction-to-lead is 53.5 °C/W, enabling reliable heat transfer in lead-mounted PCB designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VZ @ IZT | 56 V ±5% at 4.5 mA - defines precise regulation point for reference stability |
| PD | 1 W - maximum continuous power handling at 25 °C ambient |
| ZZT @ IZT | 110 Ω - low dynamic impedance ensures minimal output voltage variation under load changes |
| IR @ VR = 42.6 V | 5 µA - leakage current threshold confirming sharp knee behavior below breakdown |
| TJ MAX | +200 °C - enables operation in high-temperature industrial environments |
| RθJL | 53.5 °C/W - quantifies thermal path efficiency from junction to PCB lead |
Pinout & Package
DO-41 hermetically sealed glass package with axial leads; cathode indicated by painted band. Pure tin-plated leads comply with J-STD-002 solderability standard. Weight: ~242 mg.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to lower-potential side in reverse-bias configuration; forms ground-referenced voltage clamp |
| Cathode | Zener breakdown terminal / regulated output node | Connected to higher-potential side; provides stable 56 V reference when reverse biased |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive power supplies |
| Hermetically sealed glass case | Prevents moisture ingress and long-term parameter drift in humid or outdoor environments |
| RoHS-compliant tin plating | Ensures lead-free solder compatibility and eliminates hazardous substance compliance risk |
| DO-41 mechanical standardization | Guarantees drop-in replacement capability across legacy and new designs using industry-standard footprint |
Applications
| LED Driver Reference | AC/DC Adapter Regulation |
|---|---|
Use Scenario: Stabilizing bias voltage for constant-current LED driver ICs in commercial lighting modules. IC Role / Device Role / Timing Role: Voltage reference element providing fixed 56 V feedback threshold to control MOSFET gate drive timing. Use Value: Maintains consistent LED brightness across input line variations due to tight ±5% VZ tolerance and low 110 Ω ZZT. | Use Scenario: Secondary-side overvoltage protection and output voltage clamping in offline flyback adapters. IC Role / Device Role / Timing Role: Shunt regulator clamping output rail at 56 V during transient surges or no-load conditions. Use Value: Prevents downstream IC damage with fast response and 1 W surge capability without external series resistor. |
| On-board DC/DC Converter | Industrial Sensor Reference |
Use Scenario: Generating isolated 56 V auxiliary supply for gate drivers in 48 V telecom power systems. IC Role / Device Role / Timing Role: Primary voltage reference for feedback divider network in isolated buck-boost converter. Use Value: Delivers stable reference despite ambient temperature swings up to +200 °C junction rating. | Use Scenario: Providing excitation voltage for high-range pressure transducers requiring >50 V bridge bias. IC Role / Device Role / Timing Role: Precision analog voltage source referenced to system ground in signal conditioning circuitry. Use Value: Ensures measurement accuracy via low 5 µA leakage at 42.6 V and minimal thermal coefficient drift. |
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 |
|---|---|---|---|
| 1N4758A | Same 56 V ±5%, but manufactured by ON Semiconductor; RθJA = 125 °C/W vs. 100 °C/W for 1N4758G R0G | Higher thermal resistance limits power handling in compact layouts | Prefer 1N4758G R0G where board space constrains thermal management |
| BZX55-C56 | 56 V ±5%, 500 mW rating, DO-35 package - smaller size, lower power, higher ZZT (~200 Ω) | Not suitable for 1 W continuous dissipation; requires derating above 70 °C | Select 1N4758G R0G when full 1 W capability and DO-41 mechanical robustness are required |
Compared with 1N4758A and BZX55-C56, the 1N4758G R0G offers superior thermal performance (RθJL = 53.5 °C/W), guaranteed 1 W operation, and hermetic glass construction - making it optimal for industrial-grade voltage references demanding long-term stability and high-temperature resilience.
Availability
1N4758G R0G is available at Aetrix Electronics and suitable for LED driver reference, AC/DC adapter regulation, and on-board DC/DC converter applications requiring stable component supply, consistent Zener tolerance, and RoHS-compliant manufacturing.
Supply support for 1N4758G 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 with global distribution and AEC-Q200 qualified lines.
The 1N47xxG series was developed to deliver high-reliability, glass-encapsulated Zener references for industrial and consumer power management, emphasizing tight tolerance control, thermal resilience, and standardized DO-41 compatibility.
FAQ
What is the Zener voltage tolerance of the 1N4758G R0G?
The 1N4758G R0G has a nominal Zener voltage of 56 V with a standard tolerance of ±5%, meaning the actual breakdown voltage falls between 53.2 V and 58.8 V at 4.5 mA test current. 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 1N4758G R0G?
The 1N4758G R0G is rated for 1 W maximum power dissipation at 25 °C ambient temperature. Derating is linear at 8.33 mW/°C above 50 °C ambient, per the Absolute Maximum Ratings table. This rating assumes proper PCB copper pour and lead thermal conduction.
Is the 1N4758G R0G RoHS compliant?
Yes, the 1N4758G R0G is RoHS compliant, as explicitly stated in the FEATURES section of the datasheet. Its pure tin-plated leads meet J-STD-002 solderability requirements and contain no restricted substances per EU Directive 2011/65/EU.
What package type does the 1N4758G R0G use?
The 1N4758G R0G uses the DO-41 axial-leaded glass package, as confirmed in Mechanical Data, Ordering Information, and Package Outline Dimensions sections. It features a hermetically sealed glass body, cathode band marking, and 242 mg typical weight.
What is the Zener impedance of the 1N4758G R0G at its test current?
The 1N4758G R0G has a Zener impedance (ZZT) of 110 Ω at its specified test current of 4.5 mA (IZT), as listed in the Electrical Specifications table. This value reflects dynamic resistance in the breakdown region and directly impacts regulation accuracy under varying load conditions.
1N4758G 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):
- 56 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 110 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 42.6 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)
1N4758G R0G FAQ
1.How can I place an order for 1N4758G R0G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4758G 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 1N4758G R0G reliable?
The price and inventory of 1N4758G R0G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4758G R0G is usually 5 days.
3.What payment methods are accepted for 1N4758G R0G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4758G R0G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4758G R0G?
1N4758G R0G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4758G 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 1N4758G R0G?
For technical support, including 1N4758G R0G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4758G R0G requirements.
6.How does Aetrix verify that 1N4758G R0G is sourced from the original manufacturer or authorized distributors?
All 1N4758G 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 1N4758G R0G meets industry standards.
7.What is the process for return or replacement of 1N4758G R0G?
All 1N4758G R0G units undergo pre-shipment inspection (PSI). If there is an issue with 1N4758G 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 1N4758G R0G part is unused and in its original packaging.
Return procedure for 1N4758G R0G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4758G R0G Tags
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