FR157 Equivalent & Substitute Parts Reference

Part Overview

The FR157 is a general-purpose rectifier diode rated for 1000 V DC reverse voltage and 1.5 A average rectified current in a DO-15 through-hole axial package. This component is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. The FR157 features fast recovery characteristics with a reverse recovery time of 500 ns, suitable for standard rectification applications requiring moderate current handling at high voltage levels.

Substiute Parts

FR157

SMC Diode SolutionsIn Stock: 6718FR157 Datasheet

Current PartRFQ

FR157G

Taiwan Semiconductor CorporationIn Stock: 15822FR157G Datasheet

DirectRFQ

2A07GHA0G

Taiwan Semiconductor CorporationIn Stock: 9672A07GHA0G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FR157 is determined by strict equivalence across the following critical parameters:

Direct Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 1000 V minimum
• Current - Average Rectified (Io): 1.5 A minimum
• Mounting Type: Through Hole
• Package / Case: DO-15 or DO-204AC (axial configuration)
• Technology: Standard rectifier diode

Substitution Categories:

Direct Manufacturer Equivalent: Parts meeting all critical parameters with identical or superior electrical performance and active product status.

Similar Manufacturer Parts: Parts with higher current ratings (2 A and above) that maintain voltage compatibility and package form factor. These parts operate within the same voltage class and package family but exceed the original current specification, making them suitable for applications where the FR157 is used but higher current capacity is available or required.

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement:

The FR157G is the primary direct equivalent for the obsolete FR157. Both parts share identical voltage and current ratings, matching forward voltage characteristics, and equivalent reverse recovery performance. The FR157G is manufactured by Taiwan Semiconductor Corporation and maintains active product status with ROHS3 compliance. The operating temperature range of the FR157G (-55°C ~ 150°C) is narrower than the original FR157 (-65°C ~ 150°C) at the lower bound; this difference must be evaluated against specific application requirements. The FR157G is available in higher inventory quantities (15,800 pieces) compared to the FR157 (6,700 pieces).

For Higher Current Applications:

The 2A07GHA0G provides a 1000 V rated diode with 2 A average rectified current capacity in the same DO-15 package family. This part is suitable for applications where the FR157 is specified but higher current handling is required or preferred. The 2A07GHA0G carries AEC-Q101 automotive qualification and ROHS3 compliance. The forward voltage at rated current is lower (1 V @ 2 A) compared to the FR157 (1.3 V @ 1.5 A), resulting in reduced power dissipation in higher-current scenarios. The 2A07GHA0G employs standard recovery characteristics rather than fast recovery, which may affect switching performance in high-frequency applications.

Compliance Considerations:

Both substitute parts maintain REACH unaffected status and EAR99 export classification consistent with the original FR157. The FR157G and 2A07GHA0G are ROHS3 compliant, addressing environmental and regulatory requirements for modern production environments.

Frequently Asked Questions (FAQ)

Q: Can the FR157G be used as a direct drop-in replacement for the FR157?

A: Yes. The FR157G meets all critical electrical parameters: 1000 V reverse voltage, 1.5 A average rectified current, 1.3 V forward voltage at rated current, and 500 ns reverse recovery time. Both parts use identical DO-15 axial through-hole packaging. The operating temperature range difference (-55°C minimum for FR157G versus -65°C for FR157) must be verified against application requirements.

Q: What is the difference between the FR157G and the 2A07GHA0G?

A: The FR157G is a direct electrical equivalent with 1.5 A current rating. The 2A07GHA0G has a higher 2 A current rating in the same package. The 2A07GHA0G uses standard recovery characteristics (>500 ns) rather than fast recovery (≤500 ns), making it less suitable for high-frequency switching applications. The 2A07GHA0G includes automotive qualification (AEC-Q101).

Q: Are all substitute parts available in the same package?

A: Yes. The FR157, FR157G, and 2A07GHA0G all use DO-15 axial through-hole packaging (also designated DO-204AC). Physical dimensions and PCB mounting characteristics are compatible across all three parts.

Q: What compliance certifications apply to the substitute parts?

A: Both FR157G and 2A07GHA0G are ROHS3 compliant and REACH unaffected. The 2A07GHA0G additionally carries AEC-Q101 automotive qualification. All three parts share EAR99 export classification and identical HTSUS codes.

Q: Does the lower capacitance of the FR157G affect circuit performance?

A: The FR157G has 20 pF capacitance compared to 30 pF for the FR157 (both measured at 4V, 1MHz). The 2A07GHA0G has 15 pF. Lower junction capacitance generally reduces switching transients and improves high-frequency performance. Circuit-specific evaluation is necessary to determine if this difference impacts application requirements.

Q: Can the 2A07GHA0G be used in applications designed for the FR157?

A: The 2A07GHA0G is electrically compatible at the 1.5 A operating point specified for the FR157. The higher 2 A rating provides design margin. However, the standard recovery characteristic (versus fast recovery in the FR157) may affect performance in circuits requiring fast switching transitions. Application-specific circuit analysis is required.

Q: What is the inventory status for each part?

A: FR157 has 6,700 pieces in stock (obsolete status). FR157G has 15,800 pieces in stock (active status). 2A07GHA0G has 901 pieces in stock (active status). Availability should be confirmed with the supplier for production planning.