SR1504 Equivalent & Substitute Parts

Part Overview

The SR1504 is a Schottky rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 40 V DC reverse voltage and 15 A average rectified current in an R-6 axial through-hole package. This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product portfolio. Applications requiring this diode specification must evaluate active alternative components to ensure long-term supply chain reliability and access to manufacturer support.

Substiute Parts

SR1504

Taiwan Semiconductor CorporationIn Stock: 2942SR1504 Datasheet

Current PartRFQ

SR1504

Taiwan Semiconductor CorporationIn Stock: 2942SR1504 Datasheet

DirectRFQ

TSUP15M45SH

Taiwan Semiconductor CorporationIn Stock: 4138TSUP15M45SH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SR1504 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) rating must equal or exceed 40 V
• Current - Average Rectified (Io) must equal or exceed 15 A
• Technology must be Schottky to maintain switching speed and forward voltage characteristics
• Speed classification must support Fast Recovery ≤ 500ns, > 200mA (Io)

Mechanical Compatibility Criteria:

• Mounting type and package configuration must be compatible with the application circuit board layout
• Through-hole R-6 axial packages are not directly interchangeable with surface-mount packages without circuit board redesign

Compliance and Supply Status:

• Active product status ensures ongoing manufacturer support and supply availability
• RoHS3 compliance and REACH unaffected status must be maintained

The TSUP15M45SH meets the electrical substitution criteria with equal or superior ratings. However, it employs surface-mount technology (SMPC4.6U package) rather than through-hole mounting, requiring circuit board redesign for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

For Direct Electrical Substitution (Through-Hole Applications):

The SR1504 remains the direct electrical equivalent when through-hole R-6 axial mounting is required. Current inventory of 2,887 pieces is available. However, the "Not For New Designs" status indicates this component is in end-of-life phase. Long-term supply cannot be guaranteed beyond existing stock levels.

For New Designs or Long-Term Supply Assurance:

The TSUP15M45SH is the manufacturer-recommended alternative, classified as an Active product with 4,075 pieces in stock. This component provides superior electrical performance with higher reverse voltage rating (45 V vs. 40 V), lower reverse leakage current (350 µA vs. 500 µA), and extended operating temperature range (-55°C to 175°C vs. -50°C to 150°C). The TSUP15M45SH includes automotive-grade qualification (AEC-Q101), providing additional reliability assurance.

Critical Constraint:

The TSUP15M45SH requires surface-mount circuit board design. Direct pin-for-pin substitution in existing through-hole layouts is not possible without PCB redesign. Forward voltage is 50 mV higher at rated current, which may affect thermal performance in power-sensitive applications.

Compliance Status:

Both components maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across manufacturing regions.

Frequently Asked Questions (FAQ)

Q: Can the TSUP15M45SH replace the SR1504 without circuit board modification?

A: No. The SR1504 uses through-hole R-6 axial mounting, while the TSUP15M45SH uses surface-mount SMPC4.6U packaging. Circuit board redesign is required for substitution.

Q: What are the electrical differences between SR1504 and TSUP15M45SH?

A: The TSUP15M45SH provides higher reverse voltage (45 V vs. 40 V), lower reverse leakage current (350 µA vs. 500 µA at rated voltage), and extended temperature range (-55°C to 175°C vs. -50°C to 150°C). Forward voltage is 50 mV higher (600 mV vs. 550 mV at 15 A).

Q: Why is the SR1504 marked "Not For New Designs"?

A: This designation indicates the component has been superseded by newer alternatives in the manufacturer's portfolio. While existing stock is available, the manufacturer does not recommend this part for new product development due to limited long-term supply commitment.

Q: Is the TSUP15M45SH suitable for applications originally designed for SR1504?

A: Electrically, yes, provided the application can tolerate the 50 mV higher forward voltage and the circuit board can be redesigned for surface-mount packaging. The higher reverse voltage and lower leakage current represent improvements over the original specification.

Q: What is the significance of AEC-Q101 qualification on the TSUP15M45SH?

A: AEC-Q101 is an automotive industry qualification standard. This certification indicates the TSUP15M45SH has undergone rigorous reliability testing and is approved for automotive applications, providing additional confidence in component quality and consistency.

Q: Are both components RoHS compliant?

A: Yes. Both the SR1504 and TSUP15M45SH are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for manufacturing and distribution in regulated markets.

Q: What inventory levels are available for each part?

A: SR1504 has 2,887 pieces in stock. TSUP15M45SH has 4,075 pieces in stock. Both are listed as new original inventory.