TSPB15U50S S1G Equivalent & Substitute Parts

Part Overview

The TSPB15U50S S1G is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 50 V DC reverse voltage and 15 A average rectified current in a surface mount SMPC4.0 package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or packaging format preferences while maintaining identical functional specifications.

Substiute Parts

TSPB15U50S S1G

Taiwan Semiconductor CorporationIn Stock: 1238TSPB15U50S S1G Datasheet

Current PartRFQ

TSP15U50S S1G

Taiwan Semiconductor CorporationIn Stock: 4564TSP15U50S S1G Datasheet

Parametric EquivalentRFQ

DST1550S

Littelfuse Inc.In Stock: 15342DST1550S Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TSPB15U50S S1G are qualified based on strict electrical and mechanical parameter equivalence. The substitution criteria are defined by the following parameters:

• Voltage - DC Reverse (Vr) (Max): 50 V
• Current - Average Rectified (Io): 15 A
• Voltage - Forward (Vf) (Max) @ If: 560 mV @ 15 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Mounting Type: Surface Mount
• Package / Case: TO-277, 3-PowerDFN
• Operating Temperature - Junction: -55°C ~ 150°C
• RoHS Status: RoHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts maintain identical electrical performance across voltage, current, and thermal specifications. Packaging format variations (Cut Tape versus Tape & Reel) and minor reverse leakage current differences within acceptable tolerances do not affect functional equivalence. All substitute parts are Active status products from qualified manufacturers.

Parameter Comparison

Engineering Selection Recommendations

All three diode components—TSPB15U50S S1G, TSP15U50S S1G, and DST1550S—meet the core electrical and mechanical requirements for 50 V, 15 A Schottky rectifier applications. Selection between these parts is determined by packaging format availability and supply chain requirements rather than functional performance differences.

TSPB15U50S S1G is supplied in Cut Tape (CT) format with SMPC4.0 package designation. This configuration is suitable for applications requiring smaller order quantities or manual assembly processes.

TSP15U50S S1G is supplied in Tape & Reel (TR) format with TO-277A (SMPC) package designation. This configuration is optimized for high-volume automated assembly operations and provides higher inventory availability (4532 pcs in stock).

DST1550S is supplied in Tape & Reel (TR) format with TO-277B package designation, manufactured by Littelfuse Inc. This part exhibits a reverse leakage current specification of 3 mA @ 50 V compared to 2 mA @ 50 V for the Taiwan Semiconductor Corporation parts. This 1 mA difference remains within acceptable operating tolerances for rectifier applications and does not affect functional equivalence. Littelfuse inventory availability is highest at 15,300 pcs in stock.

All three parts are RoHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8541.10.0080. All parts maintain MSL 1 (Unlimited) moisture sensitivity rating and operate across the identical temperature range of -55°C to 150°C junction temperature.

Frequently Asked Questions (FAQ)

Q: Can TSP15U50S S1G be used as a direct replacement for TSPB15U50S S1G?

A: Yes. Both parts are manufactured by Taiwan Semiconductor Corporation and share identical electrical specifications: 50 V reverse voltage, 15 A average rectified current, 560 mV forward voltage at 15 A, and fast recovery characteristics. The primary difference is packaging format: TSPB15U50S S1G is supplied in Cut Tape while TSP15U50S S1G is supplied in Tape & Reel. Both use TO-277 / 3-PowerDFN package family with compatible pinouts and mechanical dimensions.

Q: What is the difference between the SMPC4.0, TO-277A (SMPC), and TO-277B package designations?

A: These designations refer to supplier-specific package naming conventions for the same TO-277 / 3-PowerDFN package family. SMPC4.0 and TO-277A (SMPC) are equivalent designations used by Taiwan Semiconductor Corporation. TO-277B is the Littelfuse designation for the same physical package. All three parts use identical mechanical dimensions and pinout configurations compatible with TO-277 footprints.

Q: Is the 1 mA difference in reverse leakage current between DST1550S (3 mA) and the Taiwan Semiconductor parts (2 mA) significant?

A: No. The reverse leakage current difference of 1 mA @ 50 V is within normal manufacturing tolerances for Schottky rectifier diodes and does not affect functional equivalence or circuit performance in standard rectifier applications. Both specifications meet the electrical requirements for 50 V, 15 A rectification.

Q: Which part should be selected for high-volume automated assembly?

A: TSP15U50S S1G or DST1550S are recommended for high-volume automated assembly due to Tape & Reel (TR) packaging format. TSP15U50S S1G provides 4532 pcs inventory availability, while DST1550S provides 15,300 pcs inventory availability. TSPB15U50S S1G in Cut Tape format is suitable for lower-volume or manual assembly processes.

Q: Are all three parts RoHS3 compliant?

A: Yes. TSPB15U50S S1G, TSP15U50S S1G, and DST1550S are all RoHS3 compliant and REACH unaffected. All parts are classified under ECCN EAR99 and HTSUS 8541.10.0080.

Q: What is the operating temperature range for these diodes?

A: All three parts operate across a junction temperature range of -55°C to 150°C, providing identical thermal performance specifications.