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Taiwan Semiconductor Corporation 1N5818HR1G
- Part No.:
- 1N5818HR1G
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N5818HR1G.pdf
- Description:
- DIODE SCHOTTKY 30V 1A DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:5,221
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Product details
Overview
1N5818HR1G from Taiwan Semiconductor is a 1A, 30V Schottky barrier rectifier in DO-41 package, featuring low forward voltage (0.55 V at 1 A), 30 A surge capability, and AEC-Q101 qualification for automotive reliability. It serves as a high-efficiency output rectifier in DC-DC converters and offline SMPS.
For engineers reviewing the 1N5818HR1G datasheet, 1N5818HR1G pinout, 1N5818HR1G application, or 1N5818HR1G equivalent, key selection criteria include reverse voltage rating (30 V), thermal resistance (100 °C/W), junction capacitance (55 pF), and RoHS/halogen-free compliance for automotive and industrial power designs.
Technical Context
This Schottky diode uses a single-die silicon construction with guard ring protection to suppress avalanche breakdown under transient overvoltage. Its low VF and fast recovery enable high-conversion efficiency in high-frequency switching topologies.
The device operates across –55 °C to +125 °C junction temperature range and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards. Cathode band polarity marking ensures unambiguous PCB orientation during assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum repetitive reverse voltage before breakdown; defines safe operating limit in 24 V rail applications |
| IF | 1 A - Continuous forward current rating; supports compact 1 A output stages without heatsinking |
| VF @ 1 A | 0.55 V - Low conduction loss reduces power dissipation by ~55% vs. standard PN rectifiers |
| IFSM | 30 A - Peak non-repetitive surge current tolerance; withstands inrush in adapter input stages |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; enables natural convection cooling in DO-41 footprint |
| CJ | 55 pF - Junction capacitance at 4 V; minimizes switching noise and EMI in >100 kHz converters |
Pinout & Package
Package: DO-204AL (DO-41) - axial-leaded, epoxy-molded case with pure tin-plated leads compliant to J-STD-002 solderability and JESD201 Class 2 whisker testing. Polarity indicated by cathode band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Forward current entry point | Connected to lower-potential node (e.g., switch node in buck converter); requires trace width ≥0.5 mm for 1 A continuous |
| Cathode (Lead 2) | Forward current exit / reverse blocking terminal | Marked by band; ties to output rail or ground return; critical for EMI filtering layout placement |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade temperature cycling, humidity, and mechanical shock per stress test requirements |
| Guard ring structure | Prevents edge breakdown under transient overvoltage, improving reliability in unregulated input conditions |
| RoHS & halogen-free | Complies with IEC 61249-2-21; eliminates brominated flame retardants and supports lead-free reflow profiles |
| Low TJ max derating | Rated up to +125 °C junction; maintains 1 A output capability at ambient ≤75 °C with no forced airflow |
Applications
| Automotive DC-DC Converters | USB-C Power Adapters |
|---|---|
Use Scenario: Step-down conversion from 12 V battery to 5 V/9 V USB PD rails in infotainment modules. IC Role / Device Role / Timing Role: Output rectifier in synchronous or quasi-resonant flyback topology. Use Value: 0.55 V VF minimizes conduction loss at 1 A load, enabling >92% efficiency and eliminating need for heatsink. | Use Scenario: Secondary-side rectification in compact 30 W wall adapters with universal AC input. IC Role / Device Role / Timing Role: High-frequency freewheeling diode replacing slower PN types in discontinuous conduction mode. Use Value: 55 pF junction capacitance reduces switching ringing and EMI filter component count. |
| Industrial SMPS Auxiliary Supplies | LED Driver Bias Rails |
Use Scenario: Isolated auxiliary supply powering gate drivers and controllers in motor drives. IC Role / Device Role / Timing Role: Input rectifier for 24 V isolated flyback generating 15 V bias rail. Use Value: 30 A IFSM withstands startup surges from bulk capacitor charging without degradation. | Use Scenario: Constant-voltage bias supply for LED string current regulators in streetlight drivers. IC Role / Device Role / Timing Role: Low-loss rectifier in low-power auxiliary winding circuit. Use Value: –55 °C to +125 °C operating range ensures stable operation in outdoor thermal cycling environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB130-TB | Same DO-41 package, 30 V VRRM, but VF = 0.5 V (typ) at 1 A; not AEC-Q101 qualified | Suitable for commercial-grade adapters but lacks automotive stress validation | Select when cost sensitivity outweighs automotive qualification requirement |
| SS13-E3/5AT | DO-214AC (SMA) surface-mount package; 30 V VRRM, VF = 0.5 V (max) at 1 A; AEC-Q101 qualified | Requires PCB redesign for SMT assembly; better thermal performance due to lower RθJA (75 °C/W) | Choose for space-constrained layouts where automated assembly and improved thermal management are priorities |
Compared with SB130-TB and SS13-E3/5AT, the 1N5818HR1G uniquely combines through-hole DO-41 compatibility, AEC-Q101 qualification, and optimized VF–surge trade-off for cost-sensitive yet reliability-critical automotive and industrial power supplies.
Availability
1N5818HR1G is available at Aetrix Electronics and suitable for automotive DC-DC converters, USB-C power adapters, and industrial SMPS auxiliary supplies requiring stable component supply and long-term lifecycle support.
Supply support for 1N5818HR1G 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.
The 1N5817–1N5819 family was engineered specifically for high-efficiency, high-reliability rectification in automotive-grade switching power supplies-emphasizing low VF, robust surge handling, and extended temperature operation.
FAQ
What is the peak repetitive reverse voltage rating of the 1N5818HR1G?
The 1N5818HR1G has a peak repetitive reverse voltage (VRRM) rating of 30 V. This value is confirmed in the Absolute Maximum Ratings table of the official Taiwan Semiconductor datasheet (Version H2104). It defines the maximum reverse-biased voltage the 1N5818HR1G can block continuously without breakdown, making it suitable for 24 V system-derived rails with safety margin.
Is the 1N5818HR1G qualified for automotive applications?
Yes, the "H" suffix in 1N5818HR1G denotes AEC-Q101 qualification per Taiwan Semiconductor's ordering information. The device undergoes stress testing for temperature cycling, humidity, mechanical shock, and other automotive reliability requirements. This makes the 1N5818HR1G appropriate for under-hood and infotainment power supplies where qualification is mandatory.
What is the forward voltage drop of the 1N5818HR1G at 1 A and 25 °C?
The forward voltage drop (VF) of the 1N5818HR1G is specified as a maximum of 0.55 V at IF = 1 A and TJ = 25 °C. This value appears in the Electrical Specifications table under "1N5818" column. The 1N5818HR1G's low VF directly reduces conduction losses compared to standard PN rectifiers, supporting higher efficiency in compact power designs.
What package type does the 1N5818HR1G use, and what are its key mechanical attributes?
The 1N5818HR1G uses the DO-204AL (DO-41) axial-leaded package. Key mechanical attributes include UL 94V-0 rated epoxy molding compound, pure tin-plated leads compliant with J-STD-002, JESD201 Class 2 whisker resistance, and cathode polarity marked by a visible band. Its weight is approximately 0.330 g.
Does the 1N5818HR1G have a guard ring, and what function does it serve?
Yes, the 1N5818HR1G incorporates a guard ring structure, explicitly listed under FEATURES in the Taiwan Semiconductor datasheet. This design feature prevents premature edge breakdown during transient overvoltage events-enhancing ruggedness in unregulated or noisy input environments such as automotive battery lines or industrial SMPS front ends.
1N5818HR1G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 30 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 550 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 30 V
- Capacitance @ Vr, F:
- 55pF @ 4V, 1MHz
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
- Operating Temperature - Junction:
- -55°C ~ 125°C
1N5818HR1G FAQ
1.How can I place an order for 1N5818HR1G through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5818HR1G 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 1N5818HR1G reliable?
The price and inventory of 1N5818HR1G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5818HR1G is usually 5 days.
3.What payment methods are accepted for 1N5818HR1G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5818HR1G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5818HR1G?
1N5818HR1G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5818HR1G 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 1N5818HR1G?
For technical support, including 1N5818HR1G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5818HR1G requirements.
6.How does Aetrix verify that 1N5818HR1G is sourced from the original manufacturer or authorized distributors?
All 1N5818HR1G 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 1N5818HR1G meets industry standards.
7.What is the process for return or replacement of 1N5818HR1G?
All 1N5818HR1G units undergo pre-shipment inspection (PSI). If there is an issue with 1N5818HR1G, 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 1N5818HR1G part is unused and in its original packaging.
Return procedure for 1N5818HR1G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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