DSF10TC-BT Equivalent & Substitute Parts

Part Overview

The DSF10TC-BT is a general-purpose rectifier diode manufactured by onsemi, rated for 200 V DC reverse voltage and 1 A average rectified current in a DO-204AL (DO-41) axial through-hole package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer is no longer available. Identifying equivalent and substitute parts is necessary to maintain design continuity and ensure uninterrupted supply for applications requiring this diode specification.

Substiute Parts

DSF10TC-BT

onsemiIn Stock: 1101DSF10TC-BT Datasheet

Current PartRFQ

UF4003

Diotec SemiconductorIn Stock: 15291UF4003 Datasheet

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1N4003-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 189701N4003-E3/54 Datasheet

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1N4003G-T

Diodes IncorporatedIn Stock: 29281N4003G-T Datasheet

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1N4935-T

Diodes IncorporatedIn Stock: 54791N4935-T Datasheet

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UF1D B0G

Taiwan Semiconductor CorporationIn Stock: 1174UF1D B0G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the DSF10TC-BT is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 200 V
• Current - Average Rectified (Io): Must equal or exceed 1 A
• Voltage - Forward (Vf) (Max) @ If: Must not exceed 1 V @ 1 A for direct drop-in replacement
• Current - Reverse Leakage @ Vr: Must not exceed 10 µA @ 200 V

Mechanical Compatibility Requirements:

• Mounting Type: Through Hole (required)
• Package / Case: DO-204AL, DO-41, or Axial equivalent (required)

Operational Requirements:

• Operating Temperature - Junction: Must support minimum 150°C maximum rating

Substitute parts are classified into two categories:

Direct Substitutes (Identical Electrical and Mechanical Specifications): Parts that match all critical electrical parameters and package requirements without design modification.

Compatible Substitutes (Enhanced or Equivalent Performance): Parts that meet or exceed all critical electrical parameters and package requirements, with variations in secondary characteristics such as recovery time, reverse recovery time, or temperature range that do not degrade circuit performance.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 1N4003-E3/54 (Vishay General Semiconductor - Diodes Division)

The 1N4003-E3/54 is the recommended direct substitute for the DSF10TC-BT. This part matches all critical electrical parameters (200 V reverse voltage, 1 A average rectified current, 1.1 V forward voltage at 1 A) and package specifications (DO-204AL, DO-41, axial through-hole). The 1N4003-E3/54 is classified as active product status with ROHS3 compliance and REACH unaffected status, ensuring long-term availability and regulatory compliance. Inventory availability is substantial at 18,865 pieces.

Secondary Substitute: 1N4003G-T (Diodes Incorporated)

The 1N4003G-T provides equivalent electrical performance with identical forward voltage specification (1 V @ 1 A) and package configuration. This part is active product status with ROHS3 compliance and extended operating temperature range to 175°C. Inventory availability is 2,900 pieces.

Alternative Substitute: UF1D B0G (Taiwan Semiconductor Corporation)

The UF1D B0G meets all critical electrical and mechanical requirements with enhanced reverse recovery characteristics (50 ns). This part is active product status with ROHS3 compliance and REACH unaffected status. Operating temperature range extends to 150°C maximum. Inventory availability is 1,101 pieces.

Enhanced Performance Option: UF4003 (Diotec Semiconductor)

The UF4003 offers fast recovery characteristics (50 ns reverse recovery time) while maintaining all critical electrical specifications. This part is active product status with REACH unaffected status and extended operating temperature to 175°C. Inventory availability is substantial at 15,210 pieces. Note: Package designation is DO-204AC rather than DO-204AL; both are DO-41 axial configurations with identical pin spacing and mechanical compatibility.

Alternative Option: 1N4935-T (Diodes Incorporated)

The 1N4935-T provides fast recovery performance (200 ns reverse recovery time) with slightly elevated forward voltage (1.2 V @ 1 A). This part is active product status with ROHS3 compliance and extended operating temperature range to 175°C. Inventory availability is 5,400 pieces.

All substitute parts listed are active product status, ensuring continued availability and supply chain stability compared to the obsolete DSF10TC-BT.

Frequently Asked Questions (FAQ)

Q: Can the 1N4003-E3/54 be used as a direct replacement for the DSF10TC-BT without circuit modification?

A: Yes. The 1N4003-E3/54 matches the critical electrical parameters (200 V reverse voltage, 1 A average rectified current) and package configuration (DO-204AL, DO-41, axial through-hole). The forward voltage specification of 1.1 V @ 1 A is within acceptable tolerance for general-purpose rectifier applications. No circuit modification is required.

Q: What is the difference between DO-204AL and DO-204AC package designations?

A: Both DO-204AL and DO-204AC are axial through-hole packages commonly referred to as DO-41. They share identical pin spacing, lead diameter, and mechanical dimensions. The designations reflect different standardization bodies but are mechanically and electrically interchangeable for through-hole PCB mounting applications.

Q: Why do some substitute parts have lower reverse leakage current (5 µA) compared to the DSF10TC-BT (10 µA)?

A: Lower reverse leakage current indicates improved semiconductor material quality and manufacturing processes. This is a beneficial characteristic that does not affect circuit compatibility. Parts with lower reverse leakage will perform identically or better in the application.

Q: Can fast recovery diodes (UF4003, UF1D B0G, 1N4935-T) be substituted for the standard recovery DSF10TC-BT?

A: Yes. Fast recovery diodes are fully compatible with applications designed for standard recovery diodes. The faster reverse recovery time (50 ns to 200 ns versus >500 ns) provides improved switching performance and reduced switching losses. No circuit modification is required.

Q: What is the significance of the extended operating temperature range (175°C) offered by some substitute parts?

A: Extended operating temperature range provides additional thermal margin in applications with elevated ambient or self-heating conditions. For applications designed to operate at the DSF10TC-BT maximum of 150°C, substitute parts rated to 175°C offer enhanced reliability and thermal headroom without requiring circuit redesign.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All active substitute parts listed (1N4003-E3/54, 1N4003G-T, 1N4935-T, UF4003, UF1D B0G) are RoHS3 compliant, ensuring compatibility with modern manufacturing and environmental regulations.

Q: Which substitute part offers the best availability?

A: The 1N4003-E3/54 (Vishay) offers the highest inventory availability at 18,865 pieces, followed by UF4003 (Diotec) at 15,210 pieces. Both parts are suitable for high-volume applications requiring assured supply.

Q: Can the 1N4935-T be used if forward voltage specification is critical to the application?

A: The 1N4935-T has a forward voltage specification of 1.2 V @ 1 A, which is 0.2 V higher than the DSF10TC-BT (1 V @ 1 A). For applications with tight forward voltage tolerance requirements, the 1N4003-E3/54 (1.1 V @ 1 A) or 1N4003G-T (1 V @ 1 A) are preferred selections.