LSIC2SD120D20 SiC Schottky Diode 1200V 54.5A Equivalent & Substitute Parts

Part Overview

The LSIC2SD120D20 is a Silicon Carbide (SiC) Schottky diode manufactured by Littelfuse Inc., rated for 1200V DC reverse voltage and 54.5A average rectified current in a Surface Mount TO-263-2L package. This component is classified as Obsolete, necessitating identification of equivalent and substitute parts for ongoing design requirements and procurement needs. The part operates across a junction temperature range of -55°C to 175°C and exhibits zero reverse recovery time, characteristic of SiC Schottky technology. Substitution is required due to product discontinuation while maintaining electrical and mechanical compatibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	1200	V
Current - Average Rectified (Io)	54.5	A
Voltage - Forward (Vf) Maximum @ If	1.8 V @ 20 A	V
Reverse Recovery Time (trr)	0	ns
Current - Reverse Leakage @ Vr	100	µA @ 1200 V
Capacitance @ Vr, F	1142	pF @ 1V, 1MHz
Mounting Type	Surface Mount	-
Package / Case	TO-263-2L (D2PAK)	-
Operating Temperature - Junction	-55 to 175	°C
Technology	SiC Schottky	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution of the LSIC2SD120D20 is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage rating: Minimum 1200V DC reverse voltage (Vr)
Current rating: Minimum 54.5A average rectified current (Io)
Technology: SiC Schottky diode
Reverse recovery time: 0 ns (no recovery time)
Package compatibility: Surface Mount TO-263-2L (D2PAK) or equivalent mechanical footprint
Forward voltage: Maximum 1.8V @ 20A or lower
Reverse leakage: Maximum 100µA @ 1200V or lower

Substitute Part Categories:

Category 1 - Direct Littelfuse Equivalent: LSIC2SD120D20A represents the active production equivalent from the same manufacturer, maintaining identical electrical specifications with enhanced product status (Active vs. Obsolete) and automotive qualification (AEC-Q101).

Category 2 - STMicroelectronics Alternatives: STPSC20H12G-TR and STPSC10H12GY-TR provide surface mount D2PAK packaging with 1200V rating. STPSC20H12G-TR delivers 20A current rating (below the 54.5A requirement but suitable for lower-current applications). STPSC10H12GY-TR and STPSC10H12G-TR deliver 10A current rating (further reduced current capability). STPSC10H12DY provides through-hole TO-220AC packaging, incompatible with surface mount requirements of the original part.

Substitution Limitations: Current rating is the primary limiting factor for STMicroelectronics alternatives. No substitute part in the provided list matches or exceeds the 54.5A current specification of LSIC2SD120D20. Selection of lower-current alternatives requires circuit redesign or parallel device configuration.

Parameter Comparison

Parameter	LSIC2SD120D20 (Main)	LSIC2SD120D20A	STPSC20H12G-TR	STPSC10H12GY-TR	STPSC10H12G-TR	STPSC10H12DY
Voltage - DC Reverse (Vr) Max	1200 V	1200 V	1200 V	1200 V	1200 V	1200 V
Current - Average Rectified (Io)	54.5 A	55 A	20 A	10 A	10 A	10 A
Voltage - Forward (Vf) Max @ If	1.8 V @ 20 A	1.8 V @ 20 A	1.5 V @ 20 A	1.5 V @ 10 A	1.5 V @ 10 A	1.5 V @ 10 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	100 µA @ 1200 V	120 µA @ 1200 V	60 µA @ 1200 V	60 µA @ 1200 V	60 µA @ 1200 V
Capacitance @ Vr, F	1142 pF @ 1V, 1MHz	1310 pF @ 1V, 1MHz	1650 pF @ 0V, 1MHz	725 pF @ 0V, 1MHz	725 pF @ 0V, 1MHz	725 pF @ 0V, 1MHz
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Through Hole
Package / Case	TO-263-2L (D2PAK)	TO-263-2L (D2PAK)	D2PAK (TO-263)	D2PAK (TO-263)	D2PAK (TO-263)	TO-220-2
Operating Temperature - Junction	-55 to 175 °C	-55 to 175 °C	-40 to 175 °C	-40 to 175 °C	-40 to 175 °C	-40 to 175 °C
Product Status	Obsolete	Active	Active	Active	Active	Active
Qualification	-	AEC-Q101	-	AEC-Q101	-	AEC-Q101
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: LSIC2SD120D20A

The LSIC2SD120D20A is the preferred substitute for LSIC2SD120D20. This part maintains electrical equivalence with 55A current rating (matching the original 54.5A specification within manufacturing tolerance), identical 1200V voltage rating, and equivalent forward voltage characteristics. The part is manufactured by Littelfuse Inc., ensuring design continuity and supply chain consistency. LSIC2SD120D20A holds Active product status, eliminating obsolescence risk. The part carries AEC-Q101 automotive qualification and ROHS3 compliance, meeting regulatory requirements. Packaging remains TO-263-2L Surface Mount, ensuring PCB footprint compatibility without redesign.

Secondary Recommendations: STMicroelectronics STPSC Series

STMicroelectronics alternatives are suitable only for applications where current requirements are reduced or where parallel device configurations are implemented:

STPSC20H12G-TR: Provides 20A current rating in D2PAK surface mount package. Suitable for circuits requiring 20A or less. Maintains 1200V voltage rating and zero reverse recovery time. Active product status with ROHS3 compliance. Lower forward voltage (1.5V @ 20A) provides improved efficiency compared to original part.
STPSC10H12GY-TR: Provides 10A current rating in D2PAK surface mount package. Suitable for circuits requiring 10A or less. Carries AEC-Q101 automotive qualification and ECOPACK®2 series designation. Highest inventory availability (800,400 pcs). Operating temperature range reduced to -40°C to 175°C (vs. -55°C to 175°C for original).
STPSC10H12G-TR: Functionally equivalent to STPSC10H12GY-TR with 10A current rating and D2PAK surface mount package. ECOPACK® series (non-2 variant). Lower inventory availability (4,048 pcs). Operating temperature range -40°C to 175°C.

Not Recommended: STPSC10H12DY

STPSC10H12DY is not recommended as a direct substitute. Although it maintains 1200V voltage rating and SiC Schottky technology, the through-hole TO-220AC package is mechanically incompatible with the surface mount TO-263-2L requirement of LSIC2SD120D20. PCB redesign would be necessary to accommodate this package type. Current rating of 10A is significantly below the 54.5A specification.

Frequently Asked Questions (FAQ)

Q1: Can LSIC2SD120D20A be used as a direct replacement for LSIC2SD120D20 without circuit modification?

A: Yes. LSIC2SD120D20A is electrically and mechanically equivalent to LSIC2SD120D20. The 55A current rating of LSIC2SD120D20A meets the 54.5A specification of the original part. Voltage rating (1200V), forward voltage (1.8V @ 20A), reverse recovery time (0 ns), and package (TO-263-2L) are identical. No circuit modification is required. The primary advantage is Active product status versus Obsolete status of the original part.

Q2: Why do STMicroelectronics alternatives have lower current ratings than the original LSIC2SD120D20?

A: The provided STMicroelectronics substitute parts (STPSC10H12GY-TR, STPSC10H12G-TR, STPSC20H12G-TR) represent different product lines within the STPSC series, each optimized for specific current ranges. STPSC10 series is rated for 10A, and STPSC20 series is rated for 20A. No STMicroelectronics part in the provided list matches the 54.5A rating of LSIC2SD120D20. Selection of lower-current alternatives requires circuit redesign or implementation of parallel device configurations to achieve equivalent current handling.

Q3: Are STMicroelectronics STPSC parts pin-compatible with LSIC2SD120D20?

A: STPSC10H12GY-TR, STPSC10H12G-TR, and STPSC20H12G-TR are pin-compatible with LSIC2SD120D20 when both are in D2PAK (TO-263) surface mount package. All three parts use the same TO-263-3 (D2PAK with 2 leads plus tab) package configuration. PCB footprint compatibility is maintained. STPSC10H12DY is not pin-compatible due to its through-hole TO-220AC package, which requires different PCB layout.

Q4: What is the temperature operating range difference between LSIC2SD120D20 and STMicroelectronics alternatives?

A: LSIC2SD120D20 operates across -55°C to 175°C junction temperature range. STMicroelectronics STPSC series alternatives (STPSC10H12GY-TR, STPSC10H12G-TR, STPSC20H12G-TR, STPSC10H12DY) operate across -40°C to 175°C range. The lower temperature limit is 15°C higher for STMicroelectronics parts. Applications requiring operation below -40°C junction temperature must use LSIC2SD120D20A or LSIC2SD120D20 to maintain full temperature range coverage.

Q5: Do all substitute parts meet automotive qualification requirements?

A: LSIC2SD120D20A carries AEC-Q101 automotive qualification. Among STMicroelectronics alternatives, STPSC10H12GY-TR and STPSC10H12DY carry AEC-Q101 qualification. STPSC10H12G-TR and STPSC20H12G-TR do not list automotive qualification in the provided specifications. All parts are ROHS3 compliant. Applications requiring automotive qualification should prioritize LSIC2SD120D20A or STPSC10H12GY-TR.

Q6: What is the significance of reverse recovery time (trr) being 0 ns for all listed parts?

A: Zero reverse recovery time is characteristic of SiC Schottky diode technology. This eliminates the delay between reverse bias application and complete diode blocking, reducing switching losses and enabling higher switching frequencies compared to conventional silicon rectifiers. All substitute parts maintain this SiC Schottky technology advantage, ensuring equivalent switching performance.

Q7: How do forward voltage characteristics compare between LSIC2SD120D20 and substitutes?

A: LSIC2SD120D20 specifies 1.8V maximum forward voltage at 20A. LSIC2SD120D20A maintains identical 1.8V @ 20A specification. STMicroelectronics alternatives specify lower forward voltage: 1.5V @ 20A for STPSC20H12G-TR and 1.5V @ 10A for STPSC10 series parts. Lower forward voltage reduces conduction losses and heat dissipation, providing efficiency improvement. However, current rating differences must be considered when evaluating substitutes.

Q8: Can multiple lower-current STPSC parts be paralleled to achieve 54.5A equivalent current?

A: Parallel configuration of lower-current parts is theoretically possible but requires careful circuit design consideration. Current sharing between parallel diodes depends on forward voltage matching and thermal management. The provided specifications do not include detailed current sharing characteristics or parallel operation guidelines. Circuit redesign and thermal analysis would be necessary. LSIC2SD120D20A remains the preferred solution to avoid parallel configuration complexity.

Q9: What is the inventory status of substitute parts?

A: LSIC2SD120D20A: 2,000 pcs. STPSC20H12G-TR: 1,420 pcs. STPSC10H12G-TR: 4,048 pcs. STPSC10H12GY-TR: 800,400 pcs (highest availability). STPSC10H12DY: 3,100 pcs. STPSC10H12GY-TR offers the highest inventory availability, suitable for high-volume procurement. LSIC2SD120D20A inventory is limited; early procurement is recommended for applications requiring this direct equivalent.

Q10: Are all substitute parts REACH compliant?

A: LSIC2SD120D20A, STPSC20H12G-TR, STPSC10H12GY-TR, STPSC10H12G-TR, and STPSC10H12DY all carry REACH Unaffected or REACH Compliant status. All parts are ROHS3 compliant. Environmental and regulatory compliance is maintained across all substitute options.

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