STPS30L40CG Equivalent & Substitute Parts

Part Overview

The STPS30L40CG is a Schottky diode array manufactured by STMicroelectronics, configured as 1 pair common cathode with a maximum reverse voltage rating of 40 V and average rectified current of 15 A per diode. The device is packaged in TO-263-3 (D2PAK) surface mount configuration with 2 leads plus tab. This part is classified as obsolete, necessitating identification of active equivalent and substitute components for ongoing design requirements and procurement continuity.

Substiute Parts

STPS30L40CG

STMicroelectronicsIn Stock: 2116STPS30L40CG Datasheet

Current PartRFQ

25CTQ040S

SMC Diode SolutionsIn Stock: 82825CTQ040S Datasheet

DirectRFQ

MBRB2545CTT4G

onsemiIn Stock: 53571MBRB2545CTT4G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the STPS30L40CG is determined by the following critical parameters:

Primary Substitution Criteria:

• Diode configuration: 1 Pair Common Cathode
• Technology: Schottky
• Package / Case: TO-263-3, D2PAK (2 Leads + Tab), TO-263AB
• Mounting Type: Surface Mount
• Current - Average Rectified (Io): 15 A per diode minimum
• Voltage - DC Reverse (Vr): 40 V minimum

Substitution Categories:

Direct Equivalent: Parts meeting all primary criteria with identical or superior electrical performance within the specified parameters.

Similar Substitute: Parts meeting all primary criteria with voltage ratings exceeding the original specification, suitable for applications where higher reverse voltage rating provides design margin.

Parameter Comparison

Engineering Selection Recommendations

25CTQ040S (SMC Diode Solutions):

The 25CTQ040S is classified as a direct equivalent to the STPS30L40CG. Both components share identical voltage and current ratings (40 V, 15 A), matching package configuration (TO-263-3, D2PAK), and equivalent fast recovery speed characteristics. The 25CTQ040S maintains active product status, ensuring ongoing availability and supply chain continuity. Both parts are ROHS3 compliant with MSL 1 rating. The 25CTQ040S is suitable for direct replacement in applications where the original STPS30L40CG specifications are required. Forward voltage at rated current is higher (710 mV vs. 550 mV), and reverse leakage is elevated (1 mA vs. 360 µA), which may impact thermal performance in high-frequency switching applications.

MBRB2545CTT4G (onsemi):

The MBRB2545CTT4G is classified as a similar substitute with enhanced voltage rating (45 V vs. 40 V). This component maintains the same diode configuration, technology, current rating (15 A), and package format (TO-263-3, D2PAK). The MBRB2545CTT4G is active product status with extended operating temperature range (-65°C to 175°C vs. 150°C maximum). The higher reverse voltage rating provides design margin for applications operating near the 40 V specification limit. Forward voltage specification is provided at 30 A (820 mV) rather than 15 A, limiting direct thermal comparison. Reverse leakage at the higher voltage rating (200 µA @ 45 V) is lower than the main part at its rated voltage. ROHS3 compliance and MSL 1 rating are maintained. This substitute is appropriate for designs where voltage margin and extended temperature range provide system-level benefits.

Frequently Asked Questions (FAQ)

Q: Can the 25CTQ040S replace the STPS30L40CG in all applications?

A: The 25CTQ040S meets the primary electrical and mechanical substitution criteria. Both components have identical voltage (40 V) and current (15 A) ratings, matching package configuration (TO-263-3, D2PAK), and equivalent fast recovery speed. However, the 25CTQ040S exhibits higher forward voltage (710 mV vs. 550 mV at 15 A) and elevated reverse leakage (1 mA vs. 360 µA at 40 V). Applications sensitive to thermal dissipation or leakage current should evaluate these parameter differences.

Q: What is the primary difference between the 25CTQ040S and MBRB2545CTT4G?

A: The 25CTQ040S is a direct equivalent with matching 40 V reverse voltage rating. The MBRB2545CTT4G is a similar substitute with enhanced 45 V reverse voltage rating. The MBRB2545CTT4G also provides extended operating temperature range (-65°C to 175°C vs. -55°C to 150°C for 25CTQ040S). Selection depends on whether the application requires voltage margin or extended temperature performance.

Q: Are all substitute parts in the same package?

A: Yes. The STPS30L40CG, 25CTQ040S, and MBRB2545CTT4G are all packaged in TO-263-3, D2PAK (2 Leads + Tab), TO-263AB surface mount configuration. Pin-to-pin compatibility is maintained across all three components.

Q: What is the significance of the obsolete status of the STPS30L40CG?

A: The STPS30L40CG is classified as obsolete, indicating that STMicroelectronics has discontinued production. The 25CTQ040S and MBRB2545CTT4G maintain active product status, ensuring continued availability, supply chain support, and manufacturing consistency for new designs and production runs.

Q: How do the RoHS and compliance statuses compare?

A: All three components are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The STPS30L40CG and MBRB2545CTT4G have REACH Unaffected status. The 25CTQ040S has REACH Affected status. All components carry EAR99 ECCN classification and 8541.10.0080 HTSUS code.

Q: Which substitute should be selected for thermal-sensitive applications?

A: The STPS30L40CG exhibits the lowest forward voltage (550 mV @ 15 A) and lowest reverse leakage (360 µA @ 40 V), resulting in minimal thermal dissipation. The 25CTQ040S has higher forward voltage and leakage, increasing thermal load. The MBRB2545CTT4G forward voltage specification is provided at 30 A rather than 15 A, limiting direct thermal comparison at rated current. Applications with tight thermal budgets should evaluate actual power dissipation based on operating current and frequency.