Equivalent & Substitute Parts for 30CTQ050

Part Overview

The 30CTQ050 is a Schottky diode array manufactured by Vishay General Semiconductor - Diodes Division, configured as a 1 Pair Common Cathode arrangement rated for 50 V DC reverse voltage and 15 A average rectified current per diode. The device is packaged in TO-220-3 through-hole configuration and features fast recovery characteristics with a maximum forward voltage of 620 mV at 15 A.

The 30CTQ050 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades. Active alternatives with comparable electrical and mechanical specifications are available from multiple manufacturers.

Substiute Parts

30CTQ050

Vishay General Semiconductor - Diodes DivisionIn Stock: 125030CTQ050 Datasheet

Current PartRFQ

MBR2545CTG

onsemiIn Stock: 15334MBR2545CTG Datasheet

MFR RecommendedRFQ

STPS2545CT

STMicroelectronicsIn Stock: 3356STPS2545CT Datasheet

MFR RecommendedRFQ

STPS3045CT

STMicroelectronicsIn Stock: 38456STPS3045CT Datasheet

MFR RecommendedRFQ

STPS30L60CT

STMicroelectronicsIn Stock: 35864STPS30L60CT Datasheet

MFR RecommendedRFQ

30CTQ050

Vishay General Semiconductor - Diodes DivisionIn Stock: 125030CTQ050 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 30CTQ050 is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Diode Configuration: 1 Pair Common Cathode (must match exactly)
• Technology: Schottky (must match exactly)
• Mounting Type: Through Hole (must match exactly)
• Package / Case: TO-220-3 (must match exactly)
• Current - Average Rectified (Io): 15 A minimum per diode
• Voltage - DC Reverse (Vr): 50 V minimum

Acceptable Variation Parameters:

• Voltage - Forward (Vf): Substitute parts may have lower forward voltage drop
• Current - Reverse Leakage: Substitute parts may have lower reverse leakage
• Operating Temperature Range: Substitute parts may have extended temperature ranges
• Product Status: Active status preferred over obsolete
• RoHS Compliance: ROHS3 compliant alternatives are preferred

All substitute parts listed maintain identical diode configuration, Schottky technology, through-hole mounting, and TO-220-3 packaging. Substitute parts meet or exceed the 15 A current rating and 50 V reverse voltage rating of the original part.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: STPS3045CT (STMicroelectronics)

The STPS3045CT is the recommended primary substitute for the 30CTQ050. This part maintains identical current rating (15 A per diode), matching diode configuration, Schottky technology, and TO-220-3 packaging. The STPS3045CT operates at 45 V maximum reverse voltage, which is acceptable for applications designed for 50 V operation with appropriate circuit margin analysis. The part is active in production status with ROHS3 compliance, ensuring long-term availability and regulatory alignment. Forward voltage is reduced to 570 mV at 15 A, providing improved efficiency. Maximum junction temperature of 200°C exceeds the original specification.

Secondary Substitute: MBR2545CTG (onsemi)

The MBR2545CTG provides equivalent electrical performance with 15 A current rating and 45 V reverse voltage rating. This part is active in production with ROHS3 compliance and extended operating temperature range (−65°C to 175°C). Forward voltage matches the original specification at 620 mV @ 15 A. Reverse leakage is significantly reduced to 200 µA @ 45 V.

Alternative Substitute: STPS30L60CT (STMicroelectronics)

The STPS30L60CT is suitable for applications requiring higher reverse voltage margin. This part maintains 15 A current rating and TO-220-3 packaging with 60 V reverse voltage capability. The part is active in production with ROHS3 compliance. Forward voltage is 600 mV @ 15 A. This option is appropriate when circuit design permits operation at higher voltage ratings.

Limited Substitute: STPS2545CT (STMicroelectronics)

The STPS2545CT is suitable only for applications where current requirements do not exceed 12.5 A per diode. This part operates at 45 V reverse voltage with reduced forward voltage (570 mV @ 12.5 A) and significantly reduced reverse leakage (125 µA @ 45 V). The part is active in production with ROHS3 compliance. Current rating is below the original specification and limits applicability.

Frequently Asked Questions (FAQ)

Q: Can the STPS3045CT directly replace the 30CTQ050 in all applications?

A: The STPS3045CT is mechanically and electrically compatible with the 30CTQ050 in terms of package, configuration, and current rating. However, the reverse voltage rating is reduced from 50 V to 45 V. Applications operating at or near 50 V must be evaluated to confirm adequate circuit margin at 45 V operation. The reduced forward voltage (570 mV vs. 620 mV) provides improved efficiency.

Q: What is the difference between the MBR2545CTG and STPS3045CT?

A: Both parts maintain 15 A current rating and 45 V reverse voltage rating in TO-220-3 packaging. The MBR2545CTG (onsemi) has forward voltage of 620 mV @ 15 A matching the original part, while the STPS3045CT (STMicroelectronics) has reduced forward voltage of 570 mV @ 15 A. The STPS3045CT has higher maximum junction temperature (200°C vs. 175°C). Both are ROHS3 compliant and active in production.

Q: Why is the STPS2545CT listed as a limited substitute?

A: The STPS2545CT has a reduced current rating of 12.5 A per diode compared to the original 15 A specification. This part is suitable only for applications where the actual operating current does not exceed 12.5 A. Applications requiring the full 15 A rating must use alternative substitutes.

Q: Is the STPS30L60CT suitable for all 30CTQ050 applications?

A: The STPS30L60CT maintains the 15 A current rating and TO-220-3 packaging with higher reverse voltage capability (60 V). This part is suitable for all applications designed for the 30CTQ050. The higher voltage rating provides additional circuit margin. Forward voltage is 600 mV @ 15 A, slightly lower than the original 620 mV specification.

Q: Are all substitute parts RoHS compliant?

A: All listed substitute parts are ROHS3 compliant. The original 30CTQ050 is RoHS non-compliant. Selection of ROHS3 compliant alternatives ensures regulatory compliance for new production and supports environmental standards.

Q: What is the impact of reduced reverse leakage in substitute parts?

A: Substitute parts exhibit reduced reverse leakage current compared to the 30CTQ050. The MBR2545CTG and STPS3045CT have 200 µA @ 45 V leakage versus 800 µA @ 50 V for the original part. Reduced leakage improves circuit efficiency and reduces thermal dissipation, providing performance benefits in most applications.

Q: Can substitute parts be used in existing PCB designs without modification?

A: All substitute parts use identical TO-220-3 through-hole packaging and pin configuration as the 30CTQ050. Direct PCB substitution is mechanically feasible without layout modification. Electrical circuit analysis is required to confirm compatibility with application voltage and current requirements.

Q: What is the product availability status of substitute parts?

A: All listed substitute parts are active in production status with substantial inventory levels. The STPS3045CT has the highest inventory (38,369 pcs), followed by STPS30L60CT (35,800 pcs) and MBR2545CTG (15,312 pcs). The original 30CTQ050 is obsolete with limited remaining inventory (1,184 pcs).