FR201 Equivalent & Substitute Parts Reference

Part Overview

The FR201 is a general-purpose rectifier diode rated for 50 V DC reverse voltage and 2 A average rectified current, housed in a DO-15 (DO-204AC) axial through-hole package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing design support and procurement continuity. The FR201 operates across a junction temperature range of -65°C to 125°C with fast recovery characteristics suitable for standard rectification applications.

Substiute Parts

FR201

SMC Diode SolutionsIn Stock: 795FR201 Datasheet

Current PartRFQ

FR201G

Taiwan Semiconductor CorporationIn Stock: 977FR201G Datasheet

DirectRFQ

1N5391G B0G

Taiwan Semiconductor CorporationIn Stock: 7531N5391G B0G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FR201 is determined by strict equivalence across the following critical parameters:

Direct Equivalent Criteria:

• Voltage - DC Reverse (Vr) (Max): 50 V
• Current - Average Rectified (Io): 2 A
• Mounting Type: Through Hole
• Package / Case: DO-204AC, DO-15, Axial
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Reverse Recovery Time (trr): 150 ns

Similar Substitute Criteria (Reduced Current Rating):

• Voltage - DC Reverse (Vr) (Max): 50 V
• Current - Average Rectified (Io): 1.5 A (reduced from 2 A)
• Mounting Type: Through Hole
• Package / Case: DO-204AC, DO-15, Axial
• Speed Classification: Standard Recovery >500ns, > 200mA (Io)

The FR201G qualifies as a direct equivalent, maintaining identical voltage and current ratings with compatible package designation. The 1N5391G B0G functions as a similar substitute with reduced current capacity and standard recovery speed, suitable for applications with lower current demands.

Parameter Comparison

Engineering Selection Recommendations

FR201G (Direct Equivalent): The FR201G from Taiwan Semiconductor Corporation is the primary substitute for the obsolete FR201. This part maintains identical electrical specifications including 50 V reverse voltage, 2 A average rectified current, and 150 ns reverse recovery time. The FR201G is active in production status and carries ROHS3 compliance certification, meeting modern regulatory requirements. The operating temperature range extends to 150°C maximum junction temperature, providing enhanced thermal margin compared to the FR201. Forward voltage specification increases marginally to 1.3 V at 2 A, and junction capacitance reduces to 10 pF, both within acceptable engineering tolerances for general-purpose rectification circuits.

1N5391G B0G (Similar Substitute): The 1N5391G B0G serves as a similar substitute when circuit design permits reduced current capacity. This part maintains the 50 V reverse voltage rating but operates at 1.5 A average rectified current. The speed classification transitions from fast recovery to standard recovery (>500ns), affecting switching performance in high-frequency applications. Forward voltage improves to 1.1 V at 1.5 A. This substitute is appropriate for applications with current requirements not exceeding 1.5 A and where standard recovery speed is acceptable. The part is active in production and ROHS3 compliant.

Both substitute parts share identical package designation (DO-204AC, DO-15, Axial), mounting type (through hole), and regulatory classification (REACH Unaffected, EAR99, HTSUS 8541.10.0080), ensuring mechanical and compliance compatibility with the original FR201 design.

Frequently Asked Questions (FAQ)

Q: Can FR201G directly replace FR201 in all applications?

A: The FR201G maintains identical voltage and current ratings (50 V, 2 A) and reverse recovery time (150 ns), enabling direct substitution in circuits designed for the FR201. The forward voltage increases from 1.2 V to 1.3 V at 2 A, a 0.1 V difference that typically does not affect circuit performance in rectification applications. The extended operating temperature range (-55 to 150°C versus -65 to 125°C) provides additional thermal capability.

Q: When should 1N5391G B0G be used instead of FR201G?

A: The 1N5391G B0G is appropriate when circuit current requirements do not exceed 1.5 A. This part reduces average rectified current from 2 A to 1.5 A and transitions from fast recovery to standard recovery speed classification. Applications requiring fast recovery characteristics or operating at currents above 1.5 A must use FR201G.

Q: Are the package dimensions identical between FR201, FR201G, and 1N5391G B0G?

A: All three parts use the DO-204AC (DO-15) axial through-hole package designation. Physical dimensions and lead spacing are identical, permitting direct mechanical substitution on printed circuit boards without layout modification.

Q: What compliance certifications apply to the substitute parts?

A: Both FR201G and 1N5391G B0G carry ROHS3 compliance certification and REACH Unaffected status. Both parts are classified under ECCN EAR99 and HTSUS code 8541.10.0080, matching the regulatory classification of the original FR201.

Q: How do the reverse leakage current specifications compare?

A: All three parts specify identical reverse leakage current of 5 µA at 50 V reverse voltage, indicating equivalent leakage performance across the product family.

Q: What is the significance of the capacitance difference between parts?

A: The FR201 specifies 30 pF at 4 V and 1 MHz, while FR201G specifies 10 pF and 1N5391G B0G specifies 15 pF under identical measurement conditions. Lower capacitance in the substitute parts may provide improved high-frequency performance in switching applications, though this difference is typically negligible in standard rectification circuits.

Q: Are there temperature range considerations for substitute selection?

A: The FR201 operates from -65°C to 125°C junction temperature. Both substitute parts extend the maximum junction temperature to 150°C and raise the minimum to -55°C. Applications requiring operation below -55°C must retain the original FR201 or identify alternative solutions. Applications benefiting from extended high-temperature operation should specify the substitute parts.