LSIC2SD120D10 SiC Schottky Diode 1200V 28A Equivalent & Substitute Parts

Part Overview

The LSIC2SD120D10 is a Silicon Carbide (SiC) Schottky diode manufactured by Littelfuse Inc., rated for 1200V DC reverse voltage and 28A average rectified current in a Surface Mount TO-263-2L package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for new designs and ongoing production requirements. The part operates across a junction temperature range of -55°C to 175°C and complies with RoHS3 standards with MSL Level 1 moisture sensitivity rating.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	1200	V
Current - Average Rectified (Io)	28	A
Voltage - Forward (Vf) Maximum @ If	1.8 V @ 10 A	V
Reverse Recovery Time (trr)	0	ns
Current - Reverse Leakage @ Vr	100	µA @ 1200 V
Capacitance @ Vr, F	582	pF @ 1V, 1MHz
Technology	SiC (Silicon Carbide) Schottky	—
Mounting Type	Surface Mount	—
Package / Case	TO-263-3, D2PAK (2 Leads + Tab)	—
Operating Temperature - Junction	-55 to 175	°C
RoHS Status	ROHS3 Compliant	—
Product Status	Obsolete	—

Substitute Part Grouping Explanation

Substitution of the LSIC2SD120D10 is determined by the following critical electrical and mechanical parameters:

Voltage Rating: All substitute parts must maintain the 1200V DC reverse voltage specification to ensure circuit protection and reliability.

Current Rating: The original part is rated for 28A average rectified current. Substitute parts are available at reduced current ratings (10A and 20A). Parts rated at 10A or 20A are suitable for applications where the circuit design accommodates lower current capacity. The 20A rated STPSC20H12G-TR provides the closest current match below the original specification.

Technology: All substitutes utilize SiC (Silicon Carbide) Schottky technology, maintaining the zero reverse recovery time characteristic and low forward voltage drop of the original part.

Package Compatibility: The original part uses Surface Mount TO-263-2L packaging. Substitute parts are available in:

Surface Mount D2PAK (TO-263-3) configuration: LSIC2SD120D10A, SICRB101200, STPSC10H12G-TR, STPSC10H12GY-TR, STPSC20H12G-TR
Through Hole TO-220AC configuration: STPSC10H12DY (requires PCB layout modification)

Product Status: Active substitute parts are preferred for new designs and long-term availability. The LSIC2SD120D10A (Littelfuse Gen2 Active) and STMicroelectronics ECOPACK® series (STPSC10H12G-TR, STPSC10H12GY-TR, STPSC20H12G-TR) are actively manufactured.

Compliance & Qualification: Automotive-grade parts with AEC-Q101 qualification are available (LSIC2SD120D10A, STPSC10H12DY, STPSC10H12GY-TR) for applications requiring automotive reliability standards.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io A	Vf (Max) @ If	trr ns	Ir @ Vr µA	Package	Mounting	Status	Grade
LSIC2SD120D10	Littelfuse	1200	28	1.8 @ 10A	0	100 @ 1200V	TO-263-2L	Surface Mount	Obsolete	—
LSIC2SD120D10A	Littelfuse	1200	10	—	—	—	TO-263-2L	Surface Mount	Active	Automotive
SICRB101200	SMC Diode Solutions	1200	10	1.8 @ 10A	0	100 @ 1200V	D2PAK	Surface Mount	Active	—
STPSC10H12DY	STMicroelectronics	1200	10	1.5 @ 10A	0	60 @ 1200V	TO-220-2	Through Hole	Active	Automotive
STPSC10H12G-TR	STMicroelectronics	1200	10	1.5 @ 10A	0	60 @ 1200V	D2PAK	Surface Mount	Active	—
STPSC10H12GY-TR	STMicroelectronics	1200	10	1.5 @ 10A	0	60 @ 1200V	D2PAK	Surface Mount	Active	Automotive
STPSC20H12G-TR	STMicroelectronics	1200	20	1.5 @ 20A	0	120 @ 1200V	D2PAK	Surface Mount	Active	—

Engineering Selection Recommendations

For Direct Surface Mount Replacement (Same Package, Reduced Current): The LSIC2SD120D10A is the manufacturer-recommended direct substitute. It maintains the Littelfuse Gen2 series lineage, operates in the same TO-263-2L Surface Mount package, and carries Automotive grade with AEC-Q101 qualification. Current rating is reduced to 10A, requiring circuit design verification for current capacity compatibility.

For Surface Mount D2PAK Package (Highest Current Capacity Below Original): The STPSC20H12G-TR (STMicroelectronics ECOPACK®2 series) provides the closest current match at 20A while maintaining 1200V voltage rating and Surface Mount D2PAK packaging. This part is actively manufactured with high inventory availability (1420 pcs). Forward voltage is optimized at 1.5V @ 20A compared to the original 1.8V @ 10A specification.

For Automotive Applications with AEC-Q101 Certification: Three parts meet automotive qualification requirements: LSIC2SD120D10A (Littelfuse), STPSC10H12DY (STMicroelectronics Through Hole), and STPSC10H12GY-TR (STMicroelectronics Surface Mount D2PAK). The STPSC10H12GY-TR combines automotive qualification with Surface Mount D2PAK packaging and exceptional inventory availability (800,400 pcs).

For Through Hole PCB Designs: The STPSC10H12DY is the only substitute available in Through Hole TO-220AC configuration. This part carries Automotive grade and AEC-Q101 qualification but requires PCB layout modification from the original Surface Mount design. Operating temperature range is -40°C to 175°C (compared to original -55°C to 175°C).

For General Industrial Applications (Non-Automotive): The SICRB101200 (SMC Diode Solutions) and STPSC10H12G-TR (STMicroelectronics) are suitable for non-automotive applications. Both maintain 1200V/10A specifications in Surface Mount D2PAK packaging with active product status and RoHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the LSIC2SD120D10 be directly replaced with a 10A rated substitute in a 28A circuit?

A: No. Direct replacement requires circuit design verification. If the application demands 28A continuous current, only the STPSC20H12G-TR (20A) approaches the original specification. For 10A-rated substitutes (LSIC2SD120D10A, SICRB101200, STPSC10H12G-TR, STPSC10H12GY-TR), the circuit must be redesigned or derated to operate within 10A maximum current limits.

Q: Are all substitute parts compatible with the original TO-263-2L Surface Mount footprint?

A: The LSIC2SD120D10A maintains identical TO-263-2L Surface Mount packaging. The SMC Diode Solutions SICRB101200 and STMicroelectronics STPSC10H12G-TR, STPSC10H12GY-TR, and STPSC20H12G-TR use D2PAK (TO-263-3) packaging, which is mechanically compatible with TO-263-2L footprints on most PCBs. The STPSC10H12DY uses Through Hole TO-220AC packaging and requires PCB layout modification.

Q: What is the difference between STPSC10H12G-TR and STPSC10H12GY-TR?

A: Both parts are STMicroelectronics 1200V/10A SiC Schottky diodes in Surface Mount D2PAK packaging. The STPSC10H12GY-TR is the automotive-grade variant with AEC-Q101 qualification and belongs to the ECOPACK®2 series. The STPSC10H12G-TR is the industrial-grade variant from the ECOPACK® series. Electrical specifications are identical; selection depends on automotive compliance requirements.

Q: Why does the STPSC20H12G-TR have higher reverse leakage current (120 µA) compared to the original part (100 µA)?

A: Reverse leakage current scales with current rating in SiC Schottky diodes. The STPSC20H12G-TR is rated for 20A average rectified current versus the original 28A, resulting in proportionally higher leakage at the same 1200V reverse voltage. This is a normal characteristic of the technology and does not indicate inferior performance.

Q: Is the STPSC10H12DY suitable for applications requiring -55°C minimum operating temperature?

A: No. The STPSC10H12DY operates from -40°C to 175°C, which does not meet the original part's -55°C to 175°C range. For applications requiring -55°C minimum temperature, select LSIC2SD120D10A, SICRB101200, STPSC10H12G-TR, STPSC10H12GY-TR, or STPSC20H12G-TR, all of which specify -55°C or -40°C minimum operating temperature.

Q: What is the advantage of SiC Schottky technology in these substitute parts?

A: All substitute parts maintain the zero reverse recovery time (trr = 0 ns) characteristic of the original LSIC2SD120D10. This eliminates reverse recovery losses, reduces switching noise, and improves efficiency in high-frequency applications. Forward voltage drop is also lower than silicon-based rectifiers, reducing thermal dissipation.

Q: Can I use STPSC20H12G-TR in place of LSIC2SD120D10 without circuit modification?

A: The STPSC20H12G-TR is electrically compatible at 1200V voltage rating and provides the highest current capacity (20A) among available substitutes. However, if the original circuit design requires 28A continuous current, the STPSC20H12G-TR is still undersized. Circuit analysis is required to confirm that 20A maximum current is acceptable for the application.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (LSIC2SD120D10A, SICRB101200, STPSC10H12DY, STPSC10H12G-TR, STPSC10H12GY-TR, STPSC20H12G-TR) are RoHS3 compliant with MSL Level 1 moisture sensitivity rating, matching the original part's environmental compliance.

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