STPS30L40CT Equivalent & Substitute Parts

Part Overview

The STPS30L40CT is a Schottky diode array manufactured by STMicroelectronics, configured as a 1 Pair Common Cathode arrangement with a maximum reverse voltage rating of 40 V and average rectified current of 15 A per diode. The device is packaged in a Through Hole TO-220-3 configuration and is classified as Obsolete product status.

Due to its obsolete classification, sourcing original STPS30L40CT units may present supply chain challenges. Direct equivalent and functionally compatible substitute parts are available from alternative manufacturers that maintain identical or superior electrical and mechanical specifications within the same package category.

Substiute Parts

STPS30L40CT

STMicroelectronicsIn Stock: 3133STPS30L40CT Datasheet

Current PartRFQ

25CTQ040

Vishay General Semiconductor - Diodes DivisionIn Stock: 151925CTQ040 Datasheet

DirectRFQ

30CTQ040

SMC Diode SolutionsIn Stock: 228630CTQ040 Datasheet

DirectRFQ

MBR60L45CTG

onsemiIn Stock: 3046MBR60L45CTG Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the STPS30L40CT is determined by the following critical parameters:

Primary Substitution Criteria:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 40 V minimum
• Current - Average Rectified (Io) (per Diode): 15 A minimum
• Mounting Type: Through Hole
• Package / Case: TO-220-3

Substitution Categories:

Direct Equivalents maintain all primary criteria with identical or superior electrical performance:

• 25CTQ040 (Vishay General Semiconductor - Diodes Division)
• 30CTQ040 (SMC Diode Solutions)

Functional Upgrades exceed primary specifications while maintaining full backward compatibility:

• MBR60L45CTG (onsemi) — Higher voltage rating (45 V) and current capacity (30 A)

All substitute parts operate within the same package footprint and mounting configuration, ensuring mechanical compatibility with existing circuit board layouts.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

The 30CTQ040 from SMC Diode Solutions is the preferred direct substitute. This part maintains all electrical specifications of the STPS30L40CT while offering Active product status, ensuring long-term availability. The 30CTQ040 is ROHS3 compliant and supports an extended operating temperature range to 175°C, providing superior thermal performance. Current inventory of 2216 pieces supports immediate procurement.

For Compliance-Critical Applications:

The 25CTQ040 from Vishay General Semiconductor - Diodes Division provides electrical equivalence but carries RoHS non-compliant status. This part is suitable only for applications where RoHS compliance is not required. Obsolete product status limits future availability.

For Upgraded Performance Requirements:

The MBR60L45CTG from onsemi functions as a functional upgrade, offering 45 V reverse voltage rating and 30 A current capacity per diode. This part is ROHS3 compliant with Active product status and extended temperature range to 175°C. The MBR60L45CTG is suitable for applications requiring higher voltage or current margins while maintaining TO-220-3 package compatibility.

Frequently Asked Questions (FAQ)

Q: Can the 30CTQ040 be used as a direct replacement for the STPS30L40CT?

A: Yes. The 30CTQ040 maintains identical voltage (40 V), current (15 A per diode), and package specifications (TO-220-3). Both devices are Schottky diode arrays with 1 Pair Common Cathode configuration and Fast Recovery switching characteristics. The 30CTQ040 offers improved product status (Active versus Obsolete) and extended temperature rating (175°C versus 150°C).

Q: What is the difference between the 25CTQ040 and 30CTQ040?

A: Both parts share identical electrical ratings (40 V, 15 A, TO-220-3). The primary differences are: 30CTQ040 is Active product status while 25CTQ040 is Obsolete; 30CTQ040 is ROHS3 compliant while 25CTQ040 is RoHS non-compliant; 30CTQ040 supports 175°C maximum junction temperature while 25CTQ040 supports 150°C; 30CTQ040 has lower reverse leakage current (1 mA versus 1.75 mA at 40 V).

Q: Is the MBR60L45CTG compatible with circuits designed for the STPS30L40CT?

A: Yes, with design margin considerations. The MBR60L45CTG is mechanically compatible (TO-220-3 package) and electrically superior in all ratings: 45 V reverse voltage (versus 40 V), 30 A current capacity (versus 15 A), and extended temperature range (−65°C to 175°C versus 0°C to 150°C). The higher ratings provide additional design margin and do not create compatibility issues in applications designed for the lower-rated STPS30L40CT.

Q: Why does the STPS30L40CT show Obsolete status?

A: Obsolete classification indicates the manufacturer has discontinued production. The STPS30L40CT remains available through existing inventory channels but future procurement cannot be guaranteed. Active alternatives such as the 30CTQ040 ensure long-term supply chain continuity.

Q: Are all substitute parts available in the same TO-220-3 package?

A: Yes. All substitute parts listed (25CTQ040, 30CTQ040, MBR60L45CTG) use the TO-220-3 package configuration, ensuring identical mounting footprint and thermal interface compatibility with existing circuit board designs.

Q: What is the significance of RoHS compliance for this application?

A: RoHS3 compliance indicates the part meets European Union Restriction of Hazardous Substances regulations. The STPS30L40CT and 30CTQ040 are ROHS3 compliant, while the 25CTQ040 is RoHS non-compliant. For applications subject to RoHS requirements, only ROHS3 compliant parts (30CTQ040 or MBR60L45CTG) are acceptable.

Q: Can the STPS30L40CT be used in new designs?

A: No. Obsolete product status prohibits use in new designs. The 30CTQ040 or MBR60L45CTG are appropriate selections for new circuit development, offering Active product status and assured long-term availability.