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Diodes Incorporated 1N5817-T
- Part No.:
- 1N5817-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N5817-T.pdf
- Description:
- DIODE SCHOTTKY 20V 1A DO41
- Quantity:
- Payment:
- Shipping:
Inventory:60,315
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Product details
Overview
1N5817-T from Diodes Incorporated is a 1.0A, 20V Schottky barrier rectifier in DO-41 package, featuring 0.45V forward voltage at 1.0A, 25A non-repetitive surge capability, and guard ring die construction for transient protection-used in low-voltage DC/DC converter output rectification and polarity protection circuits.
For engineers reviewing the 1N5817-T datasheet, 1N5817-T pinout, 1N5817-T application, or 1N5817-T equivalent, key selection criteria include forward voltage drop at rated current, peak repetitive reverse voltage rating, thermal resistance (15°C/W junction-to-lead), surge current handling, and RoHS-compliant tin-plated leads for lead-free assembly.
Technical Context
This Schottky diode operates via majority-carrier conduction, eliminating minority-carrier storage delay and enabling high-frequency switching performance up to several MHz. Its low VF and fast recovery (<10 ns) make it suitable for flyback and buck converter freewheeling paths where conduction loss minimization is critical.
The DO-41 package provides mechanical robustness with UL 94V-0 molded plastic housing, 0.3g mass, and cathode band polarity marking. Thermal design relies on junction-to-lead resistance (15°C/W) rather than junction-to-ambient (50°C/W), emphasizing PCB copper pad layout for heat transfer.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 20 V - Maximum reverse blocking voltage before breakdown; sets upper limit for input/output voltage differential in polarity protection or clamp circuits. |
| VF @ 1.0A | 0.45 V - Forward voltage drop determines conduction loss (0.45W at 1A); enables >90% efficiency in 3.3V–5V output rectification. |
| IFSM | 25 A - Single half-sine surge rating allows survival of inrush or fault transients without degradation. |
| IO @ TL=90°C | 1.0 A - Continuous average forward current derated for lead temperature; defines steady-state power delivery capacity. |
| CT @ 1MHz | 110 pF - Junction capacitance impacts high-frequency switching noise and EMI filtering requirements in SMPS designs. |
| RθJL | 15 °C/W - Junction-to-lead thermal resistance governs heatsinking strategy when mounted on PCB with 38mm×38mm copper pads. |
Pinout & Package
DO-41 plastic package with axial leads: anode and cathode terminals identified by cathode band marking. Molded UL 94V-0 thermoset body, tin-plated leads solderable per MIL-STD-202 Method 208.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point under forward bias | Connected to lower-potential node (e.g., switch node in buck converter or battery negative in reverse polarity protection). |
| Cathode | Current exit point under forward bias | Marked with band; connected to higher-potential node (e.g., output rail or battery positive), defining unidirectional conduction path. |
Key Features
| Feature | Design Value |
|---|---|
| Guard ring die construction | Enhances transient voltage immunity by preventing edge breakdown during fast-rising ESD or load dump events. |
| Low forward voltage (0.45V @ 1A) | Reduces power dissipation by ~40% versus comparable PN-junction rectifiers, lowering thermal stress in space-constrained layouts. |
| High surge capability (25A IFSM) | Supports reliable operation in automotive and industrial environments subject to load dump or inductive kick transients. |
| RoHS-compliant tin finish | Enables lead-free reflow soldering without wetting issues or intermetallic formation concerns in high-volume manufacturing. |
Applications
| DC/DC Converter Output Rectification | Polarity Protection |
|---|---|
Use Scenario: Rectifying switched output in 3.3V/5V buck converters powering microcontrollers or sensors. IC Role / Device Role / Timing Role: Unidirectional current valve conducting only during low-side switch off-time to maintain output continuity. Use Value: 0.45V VF limits conduction loss to 450mW at 1A, reducing thermal footprint versus higher-VF alternatives. | Use Scenario: Preventing damage from reversed battery or adapter connection in portable electronics. IC Role / Device Role / Timing Role: Series-blocking element placed between power source and system input, conducting only when polarity is correct. Use Value: Low VF ensures minimal voltage drop (<5%) in normal operation while blocking reverse current with <1μA leakage at room temperature. |
| Freewheeling Diode | Low-Voltage Clamping |
Use Scenario: Providing current path for inductive loads (relays, solenoids) during switch-off transitions. IC Role / Device Role / Timing Role: Energy recirculation path that suppresses voltage spikes across switching elements. Use Value: Fast recovery (<10 ns) and 25A surge rating prevent avalanche failure during rapid current decay in 24V industrial controls. | Use Scenario: Limiting signal or supply rail excursions to safe levels in sensor interfaces or logic-level shifters. IC Role / Device Role / Timing Role: Voltage clamp referenced to ground or rail, conducting when forward-biased beyond threshold. Use Value: 20V VRRM and low dynamic impedance enable precise clamping of 12V or 15V rails without excessive leakage at operating bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SB120-E3/54 (Vishay) | Same DO-41 package, 20V VRRM, but VF = 0.52V @ 1A (70mV higher); RθJL = 18°C/W. | Slightly higher conduction loss; less effective thermal coupling to PCB. | Select if Vishay qualification or sourcing continuity is required; verify thermal margin with 3°C/W higher junction rise. |
| 1N5817G (ON Semiconductor) | Identical electrical specs and DO-41 package; differs only in date code marking format and packaging tape dimensions. | No functional difference; fully interchangeable in design and assembly. | Prefer for ON Semi supply chain alignment; no redesign or validation needed. |
Compared with SB120-E3/54 and 1N5817G, the 1N5817-T offers the lowest forward voltage in its class and optimal thermal resistance for lead-mounted applications-making it preferred where efficiency and thermal headroom are constrained.
Availability
1N5817-T is available at Aetrix Electronics and suitable for DC/DC converter output rectification, polarity protection, freewheeling diode placement, and low-voltage clamping requiring stable component supply and consistent parametric performance across production lots.
Supply support for 1N5817-T 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design, manufacturing, and sales operations across Asia, Europe, and North America.
The 1N5817-T belongs to Diodes' general-purpose Schottky rectifier product line, engineered for cost-sensitive, high-efficiency power conversion in consumer, industrial, and computing applications where low forward voltage and fast switching are essential.
FAQ
What is the maximum junction temperature for continuous operation of the 1N5817-T?
The 1N5817-T has an operating junction temperature range of –65°C to +125°C. For continuous 1.0A operation, the lead temperature must be maintained at ≤90°C per datasheet derating curves, which corresponds to a maximum junction temperature of approximately 105°C under typical PCB mounting conditions with 38mm×38mm copper pads.
Can the 1N5817-T be used in automotive applications?
The 1N5817-T is not AEC-Q200 qualified and lacks PPAP documentation or IATF 16949-specific traceability. While its –65°C to +125°C operating range meets automotive ambient requirements, Diodes recommends contacting their automotive team for AEC-Q200-qualified equivalents like the AP1501 series if used in safety-critical or production automotive systems.
How does the 1N5817-T compare to the 1N4007 in low-voltage applications?
The 1N5817-T has a 0.45V forward voltage at 1A versus 0.7–1.1V for the 1N4007, reducing conduction loss by over 50%. It also recovers in <10 ns versus 30 μs for the 1N4007, making it suitable for switching frequencies above 100 kHz-where the 1N4007 would suffer severe losses and overheating.
Is the 1N5817-T compatible with lead-free reflow soldering processes?
Yes-the 1N5817-T features tin-plated leads compliant with RoHS and qualified for lead-free reflow soldering per JEDEC J-STD-020. Its UL 94V-0 molded plastic body withstands peak reflow temperatures up to 260°C for 10 seconds, matching standard Pb-free process profiles without delamination or marking degradation.
1N5817-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Schottky
- Voltage - DC Reverse (Vr) (Max):
- 20 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 450 mV @ 1 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 1 mA @ 20 V
- Capacitance @ Vr, F:
- 110pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
- Operating Temperature - Junction:
- -65°C ~ 125°C
1N5817-T FAQ
1.How can I place an order for 1N5817-T through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5817-T 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 1N5817-T reliable?
The price and inventory of 1N5817-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5817-T is usually 5 days.
3.What payment methods are accepted for 1N5817-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5817-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5817-T?
1N5817-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5817-T 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 1N5817-T?
For technical support, including 1N5817-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5817-T requirements.
6.How does Aetrix verify that 1N5817-T is sourced from the original manufacturer or authorized distributors?
All 1N5817-T 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 1N5817-T meets industry standards.
7.What is the process for return or replacement of 1N5817-T?
All 1N5817-T units undergo pre-shipment inspection (PSI). If there is an issue with 1N5817-T, 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 1N5817-T part is unused and in its original packaging.
Return procedure for 1N5817-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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