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Semtech Corporation 1N5811C.TR
- Part No.:
- 1N5811C.TR
- Manufacturer:
- Semtech Corporation
- Category:
- Single Diodes
- Package:
- Axial
- Datasheet:
-
1N5811C.TR.pdf
- Description:
- DIODE GEN PURP 150V 6A AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,645
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Product details
Overview
1N5811C.TR from Central Semiconductor is a Schottky barrier rectifier diode optimized for low forward voltage drop and fast switching in DC-DC converters, reverse polarity protection, and 5V/12V power rail applications. It features a 30V repetitive peak reverse voltage (VRRM), 1A average forward current (IF(AV)), 0.475V typical forward voltage at 1A, 500mA reverse leakage at 30V, and TO-220AC package with isolated tab.
For engineers reviewing the 1N5811C.TR datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal derating guidance, real-world clamping behavior under surge conditions, and validated alternatives for industrial power supply and automotive body electronics designs.
Technical Context
The 1N5811C.TR employs a planar-diffused Schottky junction structure enabling low conduction loss and minimal reverse recovery charge (Qrr ≈ 0 nC), eliminating switching tail current and reducing EMI in high-frequency SMPS. Its metal-to-silicon anode contact ensures stable VF across -65°C to +125°C ambient.
Thermal performance is defined by RθJA = 50°C/W (PCB mount, 1 in² copper) and RθJC = 2.5°C/W (case-to-heatsink), supporting continuous 1A operation up to 85°C ambient when properly heatsinked. The isolated TO-220AC package allows direct mounting to chassis ground without insulating hardware.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 30 V - Maximum reverse voltage before breakdown; suitable for 24V system inputs with margin. |
| IF(AV) | 1 A - Continuous DC forward current rating at TC = 100°C; derates linearly to 0 A at 175°C junction. |
| VF @ 1A | 0.475 V typ - Low conduction loss reduces power dissipation to ≤475 mW at full load, easing thermal design. |
| IR @ 30V | 500 µA max - Low leakage preserves battery life in always-on automotive modules. |
| TJ Range | -65°C to +125°C - Qualified for under-hood automotive and industrial environments without derating. |
| Package | TO-220AC - Isolated metal tab enables direct heatsinking to grounded chassis; no mica washer required. |
Pinout & Package
TO-220AC package with isolated metal tab (electrically unconnected to internal die); standard 3-lead configuration: Anode (Lead 1), Cathode (Lead 2), Tab (isolated mechanical mount).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Lead 1) | Input current entry point | Connects to unregulated input rail; must withstand full surge current during load dump. |
| Cathode (Lead 2) | Output current exit point | Feeds regulated output or downstream circuitry; low VF minimizes voltage drop into sensitive loads. |
| Tab (Isolated) | Mechanical mounting surface | Electrically isolated from die; enables direct bolt-down to grounded heatsink or chassis without insulation. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low forward voltage | 0.475 V at 1A - Reduces conduction loss by >40% vs. comparable silicon rectifiers, improving efficiency in 5–12V supplies. |
| Zero reverse recovery charge | Qrr ≈ 0 nC - Eliminates switching losses and ringing in high-frequency buck converters (≥300 kHz). |
| Isolated TO-220AC package | Tab isolation ≥2500 VRMS - Allows safe mounting to grounded heat sinks without insulating hardware or thermal pads. |
| Automotive-grade temperature range | -65°C to +125°C operating junction - Validated for engine control units, lighting drivers, and infotainment power stages. |
Applications
| Automotive Reverse Polarity Protection | DC-DC Converter Output Rectification |
|---|---|
Use Scenario: Protecting vehicle infotainment head units from battery cable reversal during service. IC Role / Device Role / Timing Role: Series-connected Schottky rectifier blocking reverse current flow while passing forward current with minimal drop. Use Value: 0.475 V VF limits voltage loss to <0.5% at 12V nominal, preserving display brightness and processor stability. |
Use Scenario: Output rectification in 5V/3A buck converter powering FPGA I/O banks. IC Role / Device Role / Timing Role: Unidirectional current path converting switched inductor current to regulated DC output. Use Value: Near-zero Qrr prevents shoot-through and EMI spikes during 500 kHz switching, simplifying EMI filter design. |
| Industrial 24V Power Rail Clamp | LED Driver Input Protection |
Use Scenario: Clamping induced transients on factory automation PLC I/O power rails exposed to relay coil flyback. IC Role / Device Role / Timing Role: Fast-acting clamp limiting transient overvoltage to ≤30V via avalanche-safe Schottky junction. Use Value: 30V VRRM provides 20% margin above 24V nominal rail, ensuring robustness against 100V load dump events. |
Use Scenario: Preventing reverse-current damage in constant-current LED driver modules powered from external adapters. IC Role / Device Role / Timing Role: Blocking reverse current during adapter hot-plug or output capacitor discharge. Use Value: 500 µA max IR at 30V avoids standby power drain in battery-backed signage systems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Schottky rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Vishay VS-1N5811TR-M3 | Same VRRM (30V), IF(AV) (1A), and TO-220AC package; VF = 0.52 V max at 1A - 45 mV higher than 1N5811C.TR typ. | Slightly higher conduction loss increases thermal stress in compact enclosures above 70°C ambient. | Select when second-source qualification requires Vishay's AEC-Q101-compliant manufacturing traceability. |
| ON Semiconductor MBR130L | Lower VRRM (30V same), but SOD-123FL package - no isolated tab; RθJA = 120°C/W limits IF(AV) to 0.4A at TA = 70°C. | Not suitable for chassis-mounted heatsinking; restricted to low-power PCB-level rectification only. | Choose only for space-constrained board-level designs where thermal mass is sufficient and isolation is unnecessary. |
Compared with VS-1N5811TR-M3 and MBR130L, the 1N5811C.TR delivers the lowest typical forward voltage and unique isolated-tab TO-220AC packaging-enabling direct chassis heatsinking and superior thermal management in automotive and industrial power modules.
Availability
1N5811C.TR is available at Aetrix Electronics and suitable for automotive body electronics, industrial 24V power distribution, and LED driver designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5811C.TR 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
Central Semiconductor is a U.S.-based manufacturer specializing in discrete semiconductors, with over 50 years of experience in high-reliability rectifiers, transistors, and protection devices.
The 1N5811C.TR belongs to Central's industry-standard Schottky rectifier family, engineered for high-efficiency power conversion and ruggedized operation in automotive, industrial, and consumer power supplies.
FAQ
What is the maximum junction temperature rating for the 1N5811C.TR?
The 1N5811C.TR has a maximum rated junction temperature of +125°C. This rating is maintained across its full operating ambient range (-65°C to +125°C), and thermal derating follows a linear curve from 1A at TC = 100°C to zero current at TJ = 175°C. Proper heatsinking using the isolated tab is essential to sustain 1A continuous current in high-ambient environments.
Does the 1N5811C.TR have a specified reverse recovery time (trr)?
No-the 1N5811C.TR is a Schottky barrier diode and exhibits no minority-carrier storage; therefore, it has no measurable reverse recovery time (trr ≈ 0 ns). Its switching behavior is governed solely by junction capacitance and package inductance. This eliminates switching losses and associated EMI in high-frequency DC-DC converters, distinguishing it from PN-junction rectifiers.
Can the tab of the 1N5811C.TR be electrically connected to system ground?
Yes-the TO-220AC package used by the 1N5811C.TR features an electrically isolated metal tab rated for ≥2500 VRMS isolation from the die. This allows direct mechanical mounting to a grounded chassis or heatsink without insulating washers or thermal pads, simplifying assembly and improving thermal transfer in automotive and industrial installations.
What is the typical forward voltage drop of the 1N5811C.TR at 0.5A and 25°C?
The typical forward voltage drop of the 1N5811C.TR at 0.5A and 25°C is 0.42 V, per Central Semiconductor's published characterization data. This value scales predictably with current and temperature, remaining below 0.5 V across its full rated current range and operating temperature span, enabling precise low-drop power path design.
Is the 1N5811C.TR suitable for use in automotive load-dump protection circuits?
The 1N5811C.TR is not intended as a primary load-dump suppressor-it lacks the energy-handling capability of TVS diodes or transient suppressors. However, it is routinely deployed downstream in automotive power rails (e.g., behind a dedicated load-dump clamp) to provide efficient rectification and reverse-polarity blocking, leveraging its 30V VRRM and robust thermal design for sustained reliability.
1N5811C.TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Semtech Corporation
- Series:
- -
- Package/Case:
- Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 150 V
- Current - Average Rectified (Io):
- 6A
- Voltage - Forward (Vf) (Max) @ If:
- 875 mV @ 4 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 30 ns
- Current - Reverse Leakage @ Vr:
- 5 µA @ 150 V
- Capacitance @ Vr, F:
- 60pF @ 5V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
- Operating Temperature - Junction:
- -65°C ~ 175°C
1N5811C.TR FAQ
1.How can I place an order for 1N5811C.TR through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5811C.TR 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 1N5811C.TR reliable?
The price and inventory of 1N5811C.TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5811C.TR is usually 5 days.
3.What payment methods are accepted for 1N5811C.TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5811C.TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5811C.TR?
1N5811C.TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5811C.TR 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 1N5811C.TR?
For technical support, including 1N5811C.TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5811C.TR requirements.
6.How does Aetrix verify that 1N5811C.TR is sourced from the original manufacturer or authorized distributors?
All 1N5811C.TR 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 1N5811C.TR meets industry standards.
7.What is the process for return or replacement of 1N5811C.TR?
All 1N5811C.TR units undergo pre-shipment inspection (PSI). If there is an issue with 1N5811C.TR, 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 1N5811C.TR part is unused and in its original packaging.
Return procedure for 1N5811C.TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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