1N1304 Equivalent & Substitute Parts

Part Overview

The 1N1304 is a general-purpose rectifier diode manufactured by Microchip Technology, rated for 200 V DC reverse voltage and 37 A average rectified current in a DO-203AB (DO-5) stud mount package. This component is classified as Active product status and utilizes standard recovery technology. Substitute parts are identified to provide alternative sourcing options when the primary part number is unavailable or when application requirements permit higher current ratings within the same voltage and package specifications.

Substiute Parts

1N1304

Microchip TechnologyIn Stock: 10151N1304 Datasheet

Current PartRFQ

VS-70HF20

Vishay General Semiconductor - Diodes DivisionIn Stock: 1119VS-70HF20 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 1N1304 with the VS-70HF20 is permissible based on the following alignment of critical electrical and mechanical parameters:

Matching Parameters:

• Voltage - DC Reverse (Vr) (Max): Both rated 200 V
• Package / Case: Both DO-203AB (DO-5) stud mount
• Mounting Type: Both stud mount configuration
• Technology: Both standard recovery
• Speed Classification: Both standard recovery >500 ns, >200 mA (Io)

Differing Parameters:

• Current - Average Rectified (Io): 1N1304 = 37 A; VS-70HF20 = 70 A
• Voltage - Forward (Vf) (Max): 1N1304 = 1.19 V @ 90 A; VS-70HF20 = 1.35 V @ 220 A
• Current - Reverse Leakage @ Vr: 1N1304 = 10 µA @ 200 V; VS-70HF20 = 15 mA @ 200 V
• Operating Temperature - Junction: 1N1304 = -65 to 200°C; VS-70HF20 = -65 to 150°C

The VS-70HF20 provides higher current capacity within the same voltage class and package form factor, making it suitable for applications where the 1N1304 current rating is insufficient or where design margin is required.

Parameter Comparison

Engineering Selection Recommendations

Both the 1N1304 and VS-70HF20 maintain Active product status and are REACH Unaffected with identical ECCN classification (EAR99), confirming regulatory compliance alignment. The selection between these parts depends on application current requirements:

Select 1N1304 when:

• Application current demand is 37 A or below
• Maximum junction temperature operation to 200°C is required
• Lower reverse leakage current (10 µA @ 200 V) is a design criterion

Select VS-70HF20 when:

• Application current demand exceeds 37 A up to 70 A
• Operating junction temperature requirement does not exceed 150°C
• Higher current capacity provides design margin within the same voltage and package class

Both parts share identical 200 V reverse voltage rating, DO-203AB stud mount package configuration, and standard recovery technology classification, confirming mechanical and electrical compatibility within their respective current ratings.

Frequently Asked Questions (FAQ)

Q: Can the VS-70HF20 directly replace the 1N1304 in all applications?

A: The VS-70HF20 is mechanically and electrically compatible in applications where the current requirement does not exceed 70 A and the maximum junction temperature does not exceed 150°C. The higher current rating of the VS-70HF20 (70 A versus 37 A) makes it suitable for higher-current applications. However, the reduced maximum junction temperature rating (-65 to 150°C versus -65 to 200°C) must be verified against application thermal requirements.

Q: What are the key differences in electrical characteristics?

A: The primary differences are current rating (37 A versus 70 A), forward voltage drop (1.19 V @ 90 A versus 1.35 V @ 220 A), reverse leakage current (10 µA @ 200 V versus 15 mA @ 200 V), and maximum junction temperature (-65 to 200°C versus -65 to 150°C). Both parts maintain identical 200 V reverse voltage rating and standard recovery technology.

Q: Are the packages identical?

A: Both parts use the DO-203AB (DO-5) stud mount package. The VS-70HF20 additionally supports chassis mounting, providing additional mounting flexibility. Mechanical compatibility is confirmed for stud mount applications.

Q: What compliance certifications apply to both parts?

A: Both the 1N1304 and VS-70HF20 are REACH Unaffected and classified under ECCN EAR99. Both maintain Active product status, confirming current availability and regulatory compliance.

Q: When should reverse leakage current be a selection factor?

A: The 1N1304 exhibits lower reverse leakage current (10 µA @ 200 V) compared to the VS-70HF20 (15 mA @ 200 V). Applications requiring minimal leakage current in high-impedance circuits or precision analog applications should prioritize the 1N1304 specification.