SK53A-LTP Schottky Diode Equivalent & Substitute Parts

Part Overview

The SK53A-LTP is a surface mount Schottky diode manufactured by Micro Commercial Co, rated for 30 V DC reverse voltage and 5 A average rectified current in a DO-214AC (SMA) package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary for legacy system maintenance, repair operations, and design transitions to current production components.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	30 V
Current - Average Rectified (Io)	5 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 5 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 30 V
Package / Case	DO-214AC, SMA
Mounting Type	Surface Mount
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SK53A-LTP is determined by the following critical electrical and mechanical parameters:

Voltage Rating Compatibility: The substitute part must maintain a DC reverse voltage rating of 30 V or higher to ensure safe operation within the original circuit design envelope.

Current Rating Compatibility: The substitute part must support the average rectified current requirement. The SK53A-LTP is rated for 5 A; substitute parts with equal or higher current ratings are electrically compatible.

Package Compatibility: The substitute part must use the DO-214AC (SMA) surface mount package to ensure mechanical fit on existing printed circuit boards without layout modifications.

Technology Consistency: Both the main part and substitute must employ Schottky diode technology to maintain fast recovery characteristics and forward voltage performance.

Compliance Requirements: Substitute parts must maintain ROHS3 compliance and MSL 1 rating to meet regulatory and manufacturing process requirements.

The RBR1L30ATE25 from Rohm Semiconductor meets the voltage and package requirements but has a reduced current rating of 1 A, making it suitable only for applications where the circuit current demand does not exceed 1 A.

Parameter Comparison

Parameter	SK53A-LTP (Micro Commercial Co)	RBR1L30ATE25 (Rohm Semiconductor)
Voltage - DC Reverse (Vr) (Max)	30 V	30 V
Current - Average Rectified (Io)	5 A	1 A
Voltage - Forward (Vf) (Max) @ If	550 mV @ 5 A	480 mV @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	1 mA @ 30 V	50 µA @ 30 V
Package / Case	DO-214AC, SMA	DO-214AC, SMA
Mounting Type	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For Direct Replacement in Existing Designs: The SK53A-LTP is classified as "Not For New Designs." Existing systems using this component require substitutes that maintain electrical and mechanical compatibility. The RBR1L30ATE25 provides equivalent voltage rating and package form factor, ensuring mechanical and electrical interface compatibility at the board level.

Current Rating Consideration: The RBR1L30ATE25 has a maximum average rectified current of 1 A, compared to the SK53A-LTP's 5 A rating. Selection of this substitute is limited to circuit applications where the steady-state rectified current does not exceed 1 A. Applications requiring the full 5 A capacity of the original part require alternative substitutes with higher current ratings.

Compliance Alignment: Both parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with current manufacturing and environmental standards. No additional compliance modifications are required for substitution.

Reverse Leakage Performance: The RBR1L30ATE25 exhibits lower reverse leakage current (50 µA @ 30 V) compared to the SK53A-LTP (1 mA @ 30 V), resulting in improved leakage performance in the substitute part.

Frequently Asked Questions (FAQ)

Q: Can the RBR1L30ATE25 be used as a direct replacement for the SK53A-LTP in all applications?

A: The RBR1L30ATE25 is mechanically and electrically compatible at the package level and voltage rating. However, its 1 A current rating limits its use to applications where circuit current does not exceed 1 A. Applications requiring the full 5 A capacity of the original part require alternative substitutes.

Q: What is the primary difference between the SK53A-LTP and RBR1L30ATE25?

A: The primary difference is the average rectified current rating. The SK53A-LTP is rated for 5 A, while the RBR1L30ATE25 is rated for 1 A. Both parts share identical 30 V voltage ratings and DO-214AC package specifications.

Q: Are there any compliance issues when substituting the RBR1L30ATE25 for the SK53A-LTP?

A: No compliance issues exist. Both parts are ROHS3 compliant and carry MSL 1 ratings, meeting current regulatory and manufacturing requirements.

Q: Does the RBR1L30ATE25 have better performance characteristics than the SK53A-LTP?

A: The RBR1L30ATE25 exhibits lower reverse leakage current (50 µA versus 1 mA at 30 V) and lower forward voltage drop at its rated current (480 mV @ 1 A versus 550 mV @ 5 A). Both parts maintain identical fast recovery speed specifications.

Q: What packaging format is used for the RBR1L30ATE25?

A: The RBR1L30ATE25 is supplied in Cut Tape (CT) and Digi-Reel® packaging, compared to the SK53A-LTP's Tape & Reel (TR) format. Both use the same DO-214AC (SMA) component package for board-level mounting.

Q: Can the SK53A-LTP be used in new product designs?

A: No. The SK53A-LTP is classified as "Not For New Designs." New designs must select from current production Schottky diodes with equivalent or superior electrical specifications and current manufacturing status.

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