TSP10U45S Equivalent & Substitute Parts

Part Overview

The TSP10U45S is a 10A, 45V Trench Schottky diode manufactured by Taiwan Semiconductor Corporation, designed for surface mount applications in the TO-277A (SMPC) package. This component is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified to provide design flexibility, accommodate supply chain variations, and support alternative sourcing strategies while maintaining electrical and mechanical compatibility within specified parameters.

Substiute Parts

TSP10U45S

Taiwan Semiconductor CorporationIn Stock: 5206TSP10U45S Datasheet

Current PartRFQ

PMEG045T050EPDZ

Nexperia USA Inc.In Stock: 2499PMEG045T050EPDZ Datasheet

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ST1045S

SMC Diode SolutionsIn Stock: 5813ST1045S Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TSP10U45S are identified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): 45 V (exact match required)
• Technology: Schottky (exact match required)
• Mounting Type: Surface Mount (exact match required)
• Package / Case: TO-277, 3-PowerDFN (exact match required)
• Current - Average Rectified (Io): Equal to or greater than 10 A
• Voltage - Forward (Vf) (Max) @ If: Within acceptable operating range
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io) (exact match required)
• RoHS Status: ROHS3 Compliant (exact match required)

Substitute Parts Identified:

1. PMEG045T050EPDZ (Nexperia USA Inc.): Meets reverse voltage and Schottky technology requirements. Current rating of 5A is lower than the main part (10A). Forward voltage of 465 mV @ 5 A is comparable. Fast recovery speed specification met. Package is TO-277, 3-PowerDFN. RoHS3 compliant. Automotive grade with AEC-Q101 qualification.

2. ST1045S (SMC Diode Solutions): Meets reverse voltage of 45V and Schottky technology requirements. Current - Average Rectified (Io) is not specified in provided data. Forward voltage of 570 mV @ 10 A is higher than the main part. Fast recovery speed specification met. Package is TO-277, 3-PowerDFN. RoHS3 compliant. Operating temperature range matches the main part.

Parameter Comparison

Engineering Selection Recommendations

TSP10U45S (Main Part): The TSP10U45S is the primary component specification with Active product status, RoHS3 compliance, and REACH Unaffected status. This part is suitable for applications requiring 10A rectified current at 45V reverse voltage with minimal forward voltage drop (460 mV @ 10 A).

PMEG045T050EPDZ (Nexperia USA Inc.): This substitute is suitable for applications where current requirements do not exceed 5A. The part offers superior reverse leakage characteristics (44 µA @ 45 V versus 300 µA) and includes automotive-grade qualification (AEC-Q101). The maximum junction temperature of 175°C exceeds the main part specification. Packaging is CFP15 (Cut Tape & Digi-Reel®) rather than TO-277A (SMPC). This part is appropriate for automotive and high-reliability applications with reduced current demands.

ST1045S (SMC Diode Solutions): This substitute meets the 45V reverse voltage and Schottky technology requirements. The forward voltage specification (570 mV @ 10 A) is elevated compared to the main part (460 mV @ 10 A), resulting in increased power dissipation. Reverse leakage current is higher (800 µA @ 45 V versus 300 µA). Current - Average Rectified (Io) is not specified in provided data, limiting full electrical equivalence assessment. Operating temperature range matches the main part (-55 to 150°C). REACH Status is listed as Affected. Packaging is TO-277B rather than TO-277A (SMPC). This part is suitable for applications where forward voltage elevation and higher leakage current are acceptable.

Frequently Asked Questions (FAQ)

Q: Can PMEG045T050EPDZ directly replace TSP10U45S in all applications?

A: PMEG045T050EPDZ is not a direct replacement for all applications. The current rating is 5A compared to 10A for the TSP10U45S. Direct substitution is limited to applications requiring 5A or less rectified current. The part is suitable for lower-current applications and offers improved reverse leakage characteristics and higher maximum junction temperature.

Q: What are the packaging differences between the substitute parts?

A: TSP10U45S uses TO-277A (SMPC) packaging. PMEG045T050EPDZ uses CFP15 packaging (Cut Tape & Digi-Reel®). ST1045S uses TO-277B packaging. While all three parts use the TO-277, 3-PowerDFN case style, the supplier device packages differ. PCB layout and assembly considerations may be affected by these packaging variations.

Q: How do forward voltage differences impact circuit performance?

A: Forward voltage directly affects power dissipation and voltage drop across the diode. TSP10U45S specifies 460 mV @ 10 A. PMEG045T050EPDZ specifies 465 mV @ 5 A. ST1045S specifies 570 mV @ 10 A. The ST1045S exhibits significantly higher forward voltage, resulting in increased heat generation and reduced efficiency in rectification circuits. Circuit design must account for these voltage differences.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all three parts (TSP10U45S, PMEG045T050EPDZ, and ST1045S) are RoHS3 compliant. REACH status differs: TSP10U45S and PMEG045T050EPDZ are REACH Unaffected. ST1045S is REACH Affected. Regulatory compliance requirements should be verified for specific applications and jurisdictions.

Q: What is the significance of reverse leakage current differences?

A: Reverse leakage current affects standby power consumption and circuit performance at reverse bias conditions. TSP10U45S specifies 300 µA @ 45 V. PMEG045T050EPDZ specifies 44 µA @ 45 V (significantly lower). ST1045S specifies 800 µA @ 45 V (significantly higher). Lower leakage current reduces standby power dissipation and improves circuit efficiency. Higher leakage current increases standby power consumption.

Q: Can ST1045S be used as a direct replacement despite unspecified current rating?

A: ST1045S cannot be confirmed as a direct replacement due to unspecified Current - Average Rectified (Io) in provided data. Additionally, the forward voltage specification (570 mV @ 10 A) is substantially higher than the main part, and reverse leakage current is elevated (800 µA @ 45 V). These electrical differences require circuit re-evaluation before substitution.

Q: What is the maximum junction temperature consideration for substitute selection?

A: TSP10U45S and ST1045S both specify -55 to 150°C operating temperature range. PMEG045T050EPDZ specifies 175°C maximum junction temperature, providing higher thermal margin. Applications operating near thermal limits may benefit from PMEG045T050EPDZ, provided current requirements do not exceed 5A.