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HomeProductsDiscrete Semiconductor ProductsDiodes - Rectifiers - SingleLFUSCD20065B
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LFUSCD20065B - Littelfuse Inc.

Manufacturer Part Number
LFUSCD20065B
Manufacturer
Littelfuse
Allelco Part Number
98D-LFUSCD20065B
Warranty
1 Year Allelco Warranty - Find out more
Stock Status:
5,321 pcs available, New & Original
Parts Description
DIODE SIL CARB 650V 20A TO247AD
Package
TO-247AD
Data sheet
LFUSCD20065B.pdf
RoHs Status
ROHS3 Compliant
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In stock: 5321

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Specifications

LFUSCD20065B Tech Specifications
Littelfuse Inc. - LFUSCD20065B technical specifications, attributes, parameters and parts with similar specifications to Littelfuse Inc. - LFUSCD20065B

Product Attribute Attribute Value
Manufacturer Littelfuse
Voltage - Forward (Vf) (Max) @ If 1.7 V @ 20 A
Voltage - DC Reverse (Vr) (Max) 650 V
Technology SiC (Silicon Carbide) Schottky
Supplier Device Package TO-247AD
Speed No Recovery Time > 500mA (Io)
Series -
Reverse Recovery Time (trr) 0 ns
Product Attribute Attribute Value
Package / Case TO-247-3
Package Tube
Operating Temperature - Junction 175°C (Max)
Mounting Type Through Hole
Current - Reverse Leakage @ Vr 500 µA @ 650 V
Current - Average Rectified (Io) 20A
Capacitance @ Vr, F 580pF @ 1V, 1MHz

Environmental & Export Classifications

ATTRIBUTE DESCRIPTION
RoHs Status ROHS3 Compliant
Moisture Sensitivity Level (MSL) 1 (Unlimited)
ECCN EAR99

Frequently Asked Questions(FAQ)

What are the key performance advantages of the LFUSCD20065B compared to traditional silicon rectifiers in high-frequency switching applications?
The LFUSCD20065B leverages SiC Schottky technology, enabling zero reverse recovery time (0 ns) and minimal forward voltage drop (1.7 V at 20 A), which significantly reduces switching losses and thermal stress. In comparison to silicon diodes—such as the UF4007 or MUR1660CT—this translates to higher efficiency and improved reliability in hard-switching topologies like buck converters operating above 100 kHz. The absence of stored charge during reverse transitions eliminates ringing and EMI issues common in Si devices.
How does the leakage current specification of the LFUSCD20065B impact system-level power loss in high-voltage DC-DC designs?
With a reverse leakage current of 500 µA at 650 V, the LFUSCD20065B contributes approximately 0.325 W of static power dissipation under full blocking voltage—negligible in most cases but relevant in ultra-low-power systems or cold-start scenarios. This is substantially lower than comparable silicon diodes; for example, a standard 650 V Si diode may exhibit leakage currents in the milliamp range, leading to measurable losses over time. Engineers should consider this when designing for maximum efficiency across wide temperature ranges, especially as leakage typically increases with junction temperature.
Can the LFUSCD20065B be used interchangeably with the suggested substitutes like IDW16G65C5XKSA1 in a 400 V bus application?
While the IDW16G65C5XKSA1 from Infineon shares similar voltage ratings and package compatibility, its forward voltage drop is typically higher (around 1.8–2.0 V at 20 A), resulting in slightly greater conduction losses. Additionally, the capacitance characteristics differ—IDW16G65C5XKSA1 reports ~700 pF, whereas the LFUSCD20065B offers 580 pF at 1 V/1 MHz—implying better high-frequency performance. Substitution may be acceptable if thermal margins allow, but direct replacement without recalculating total losses could compromise long-term efficiency.
What design considerations arise when integrating the LFUSCD20065B into a forced-air cooling system versus passive thermal management?
The LFUSCD20065B has a maximum junction temperature of 175°C and exhibits low thermal resistance due to its TO-247AD package. In forced-air environments, typical heatsink designs can achieve junction temperatures below 100°C even at full load, enabling stable operation with minimal derating. However, in passive systems, continuous 20 A conduction may require careful layout and heatsinking to avoid exceeding thermal limits, particularly given the 1.7 V forward drop that generates ~34 W of power dissipation at rated current. Thermal simulation using θJA or θJC values from the datasheet is essential before finalizing enclosure design.
Why might an engineer choose the LFUSCD20065B over a standard silicon diode despite its premium cost in automotive PFC stages?
In power factor correction (PFC) circuits operating near 600 V rails, the LFUSCD20065B’s fast switching capability and negligible trr eliminate snubber requirements and reduce electromagnetic interference. Silicon diodes would suffer from significant reverse recovery spikes, requiring additional filtering and increasing component count. Although the LFUSCD20065B costs more upfront, the reduction in BOM complexity, improved efficiency (>99% in well-designed PFCs), and enhanced reliability justify the selection in space-constrained, high-performance applications.
How does the capacitance parameter (580 pF @ 1V, 1MHz) influence gate drive noise immunity in synchronous rectification layouts?
The relatively low junction capacitance of the LFUSCD20065B helps minimize Miller plateau effects and parasitic oscillations in synchronous buck converters. When paralleled with MOSFETs, this characteristic reduces shoot-through risk during dead-time transitions. Compared to older-generation Si diodes with higher Cj, the 580 pF value supports cleaner commutation, especially in interleaved multi-phase architectures where switching nodes experience rapid dv/dt transients.
Are there any layout constraints specific to the TO-247AD package when mounting the LFUSCD20065B on a PCB?
Yes. The TO-247AD variant features a center-tab configuration optimized for bolted connections, requiring proper isolation pads and thermal interface materials if direct attachment to a heatsink is intended. On PCBs, users must ensure adequate copper area around the pins to handle 20 A without excessive trace heating. Unlike standard TO-247, the AD version lacks a fully exposed tab, so thermal vias and solder paste optimization become critical for achieving acceptable RθJC performance in surface-mount implementations.
What environmental and regulatory factors make the LFUSCD20065B suitable for industrial or outdoor power electronics?
Compliant with RoHS3 standards and classified under ECCN EAR99 with HTSUS 8541.10.0080, the LFUSCD20065B avoids restricted substances and simplifies export compliance. Its MSL rating of 1 allows unlimited floor life, reducing handling risks in high-volume manufacturing. Furthermore, the 175°C max junction temperature ensures robustness against ambient thermal cycling common in outdoor inverters or motor drives exposed to direct sunlight or variable climate conditions.

Parts with Similar Specifications

The three parts on the right have similar specifications to Littelfuse Inc. LFUSCD20065B

Product Attribute LFUSCD08065A LFUSCD04065A LFUSCD06065A LFUSCD16065B
Part Number LFUSCD08065A LFUSCD04065A LFUSCD06065A LFUSCD16065B
Manufacturer Littelfuse Inc. Littelfuse Inc. Hamlin / Littelfuse Littelfuse Inc.
Mounting Type - Surface Mount Through Hole Surface Mount
Operating Temperature - Junction - - - -
Capacitance @ Vr, F - - - -
Current - Average Rectified (Io) - - - -
Voltage - Forward (Vf) (Max) @ If - - - -
Voltage - DC Reverse (Vr) (Max) - - - -
Package - Tape & Reel (TR) Tube Tape & Reel (TR)
Series - - - -
Package / Case - 196-LFBGA 16-DIP (0.300', 7.62mm) 64-VFQFN Exposed Pad
Reverse Recovery Time (trr) - - - -
Supplier Device Package - 196-NFBGA (12x12) 16-PDIP 64-VQFN (9x9)
Speed - - - -
Current - Reverse Leakage @ Vr - - - -
Technology - - - -

LFUSCD20065B Datasheet PDF

Download LFUSCD20065B pdf datasheets and Littelfuse Inc. documentation for LFUSCD20065B - Littelfuse Inc..

Datasheets
LFUSCD20065B Datasheet.pdf

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Delivery Time

In-stock items can be shipped within 24 hours. Some parts will be arranged for delivery within 1-2 days from the date all items arrive at our warehouse. And Allelco ships order once a day at about 17:00, except Sunday. Once the goods are shipped, the estimated delivery time depends on the shipping methods and Delivery destination. The table below shows are the logistic time for some common countries.

Delivery Cost

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  2. Use our account for the shipment. Refer to the table below for the approximate charges.
(Different time frame / countries / package size has different price.)

Delivery Method

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Common Countries Logistic Time Reference
Region Country Logistic Time(Day)
America United States 5
Brazil 7
Europe Germany 5
United Kingdom 4
Italy 5
Oceania Australia 6
New Zealand 5
Asia India 4
Japan 4
Middle East Israel 6
DHL & FedEx Shipment Charges Reference
Shipment charges(KG) Reference DHL(USD$)
0.00kg-1.00kg USD$30.00 - USD$60.00
1.00kg-2.00kg USD$40.00 - USD$80.00
2.00kg-3.00kg USD$50.00 - USD$100.00
Note:
The above table is for reference only. There may have some data bias for the uncontrollable factors.
Contact us if you have any questions.
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Allelco is committed to exceeding customer expectations through customer service excellence, order accuracy, and on-time delivery.
This is achieved through our commitment to the continual improvement of our processes, services, and products.


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Electrostatic Discharge Protection and Handling

All electrostatic-sensitive components are handled in accordance with electrostatic discharge control procedures. The products are hermetically sealed in anti-static safe packaging to prevent electrostatic damage. Appropriate labeling is also applied for identification and traceability. This ensures product integrity during storage, handling and transportation.


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Certifications & Memberships

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  • ISO 9001: 2015
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Littelfuse Inc.

LFUSCD20065B

Littelfuse Inc.
98D-LFUSCD20065B

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