LSIC2SD120D15 Equivalent & Substitute Parts

Part Overview

The LSIC2SD120D15 is a Silicon Carbide Schottky diode manufactured by Littelfuse Inc., rated for 1200 V DC reverse voltage and 44 A average rectified current in a surface mount TO-263-2L package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The part operates across a junction temperature range of -55°C to 175°C and complies with ROHS3 standards.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	1200 V
Current - Average Rectified (Io)	44 A
Voltage - Forward (Vf) (Max) @ If	1.8 V @ 15 A
Reverse Recovery Time (trr)	0 ns
Current - Reverse Leakage @ Vr	100 µA @ 1200 V
Capacitance @ Vr, F	920 pF @ 1V, 1MHz
Mounting Type	Surface Mount
Package / Case	TO-263-3, D2PAK (2 Leads + Tab)
Operating Temperature - Junction	-55°C ~ 175°C
Technology	SiC (Silicon Carbide) Schottky
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the LSIC2SD120D15 is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 1200 V
Technology: SiC (Silicon Carbide) Schottky
Mounting Type: Surface Mount
Package / Case: TO-263-3, D2PAK (2 Leads + Tab)
RoHS Status: ROHS3 Compliant

Current Rating Consideration: The LSIC2SD120D15 is rated for 44 A average rectified current. Substitute parts may have equal or higher current ratings while maintaining all other electrical and mechanical specifications. Parts with lower current ratings do not qualify as direct substitutes for this application.

Electrical Performance Parameters: Forward voltage, reverse leakage current, and capacitance values are provided for reference but do not restrict substitution eligibility when other parameters align. Reverse recovery time of 0 ns is characteristic of SiC Schottky technology and is maintained across all qualified substitutes.

Temperature Range: Operating junction temperature range must support the application requirements. The LSIC2SD120D15 operates from -55°C to 175°C.

Parameter Comparison

Parameter	LSIC2SD120D15 (Littelfuse)	IDK20G120C5XTMA1 (Infineon)	STPSC10H12DY (STMicroelectronics)	STPSC10H12G-TR (STMicroelectronics)	STPSC10H12GY-TR (STMicroelectronics)	STPSC20H12G-TR (STMicroelectronics)
Voltage - DC Reverse (Vr) (Max)	1200 V	1200 V	1200 V	1200 V	1200 V	1200 V
Current - Average Rectified (Io)	44 A	56 A	10 A	10 A	10 A	20 A
Voltage - Forward (Vf) (Max) @ If	1.8 V @ 15 A	1.8 V @ 20 A	1.5 V @ 10 A	1.5 V @ 10 A	1.5 V @ 10 A	1.5 V @ 20 A
Reverse Recovery Time (trr)	0 ns	0 ns	0 ns	0 ns	0 ns	0 ns
Current - Reverse Leakage @ Vr	100 µA @ 1200 V	123 µA @ 1200 V	60 µA @ 1200 V	60 µA @ 1200 V	60 µA @ 1200 V	120 µA @ 1200 V
Mounting Type	Surface Mount	Surface Mount	Through Hole	Surface Mount	Surface Mount	Surface Mount
Package / Case	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-220-2	TO-263-3, D2PAK	TO-263-3, D2PAK	TO-263-3, D2PAK
Operating Temperature - Junction	-55°C ~ 175°C	-55°C ~ 175°C	-40°C ~ 175°C	-40°C ~ 175°C	-40°C ~ 175°C	-40°C ~ 175°C
Technology	SiC Schottky	SiC Schottky	SiC Schottky	SiC Schottky	SiC Schottky	SiC Schottky
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Highest Compatibility):

The IDK20G120C5XTMA1 from Infineon Technologies is the primary equivalent for the LSIC2SD120D15. This part maintains identical voltage rating (1200 V), surface mount D2PAK packaging, SiC Schottky technology, and extended temperature range (-55°C to 175°C). The current rating of 56 A exceeds the original 44 A specification, providing design margin. The IDK20G120C5XTMA1 is in active product status with ROHS3 compliance and REACH unaffected designation.

Alternative Substitutes (Current Rating Dependent):

The STPSC20H12G-TR from STMicroelectronics provides a 20 A rated alternative in the same TO-263-3 D2PAK surface mount package with 1200 V rating and SiC Schottky technology. This part is suitable for applications requiring 20 A or less. The STPSC20H12G-TR is active, ROHS3 compliant, and operates from -40°C to 175°C.

The STPSC10H12G-TR and STPSC10H12GY-TR are 10 A rated alternatives in D2PAK surface mount packaging. The STPSC10H12GY-TR (ECOPACK®2 series) offers automotive grade qualification (AEC-Q101) and is suitable for applications requiring 10 A or less. Both maintain 1200 V rating and SiC Schottky technology with -40°C to 175°C operating range.

Package Consideration:

The STPSC10H12DY is a through-hole TO-220AC package alternative. This part is not recommended as a direct substitute due to mounting type incompatibility with the original surface mount requirement, unless PCB redesign is acceptable.

Product Status Impact:

All recommended substitutes are in active product status, ensuring long-term availability and supply chain continuity compared to the obsolete LSIC2SD120D15.

Frequently Asked Questions (FAQ)

Q: Can the IDK20G120C5XTMA1 directly replace the LSIC2SD120D15 without circuit modification?

A: Yes. The IDK20G120C5XTMA1 maintains identical voltage rating (1200 V), package type (TO-263-3 D2PAK), mounting method (surface mount), and technology (SiC Schottky). The higher current rating (56 A vs. 44 A) does not require circuit changes and provides additional design margin.

Q: Why are the STMicroelectronics STPSC10H12G-TR and STPSC20H12G-TR listed as substitutes if they have lower current ratings?

A: These parts are listed as substitutes for applications where the full 44 A current capacity of the LSIC2SD120D15 is not required. The STPSC20H12G-TR (20 A) is suitable for designs requiring up to 20 A, and the STPSC10H12G-TR (10 A) for designs requiring up to 10 A. Both maintain the critical 1200 V voltage rating, D2PAK surface mount package, and SiC Schottky technology.

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

A: Both parts are 10 A rated SiC Schottky diodes in D2PAK surface mount packaging with 1200 V rating. The STPSC10H12GY-TR is the ECOPACK®2 series variant with automotive grade qualification (AEC-Q101) and higher inventory availability (800,400 pcs vs. 4,048 pcs). Selection depends on automotive qualification requirements.

Q: Is the STPSC10H12DY a suitable substitute?

A: The STPSC10H12DY maintains the 1200 V voltage rating and SiC Schottky technology but uses through-hole TO-220AC packaging instead of surface mount D2PAK. This part is not a direct substitute without PCB redesign. It is listed for reference only if mounting type conversion is acceptable.

Q: What is the minimum operating temperature difference between the LSIC2SD120D15 and substitute parts?

A: The LSIC2SD120D15 operates from -55°C to 175°C. The STMicroelectronics substitutes (STPSC series) operate from -40°C to 175°C, representing a 15°C minimum temperature limitation. The Infineon IDK20G120C5XTMA1 matches the full -55°C to 175°C range. Application requirements determine if this difference is acceptable.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts (IDK20G120C5XTMA1, STPSC10H12DY, STPSC10H12G-TR, STPSC10H12GY-TR, STPSC20H12G-TR) are ROHS3 compliant, matching the original LSIC2SD120D15 specification.

Q: Which substitute offers the best long-term availability?

A: The STPSC10H12GY-TR demonstrates the highest inventory level (800,400 pcs) and active product status. The IDK20G120C5XTMA1 from Infineon is the closest electrical equivalent with active status and 1,069 pcs in stock. Both are suitable for long-term design support.

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