FR203 Equivalent & Substitute Parts

Part Overview

The FR203 is a general-purpose rectifier diode rated for 200 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, indicating that direct procurement from the original manufacturer (SMC Diode Solutions) may be limited or unavailable. Identifying equivalent substitute parts ensures design continuity and maintains supply chain reliability for applications requiring this electrical specification.

Substiute Parts

FR203

SMC Diode SolutionsIn Stock: 46378FR203 Datasheet

Current PartRFQ

FR203G

Taiwan Semiconductor CorporationIn Stock: 754FR203G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FR203 is determined by electrical and mechanical parameter equivalence within the rectifier diode category. The following parameters establish substitution validity:

Primary Matching Criteria:

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

Secondary Compatibility Factors:

• Current - Reverse Leakage @ Vr: 5 µA @ 200 V
• Voltage - Forward (Vf) (Max) @ If: Within acceptable operating range

Substitute parts must satisfy all primary matching criteria to ensure functional equivalence in circuit applications. Secondary factors may exhibit minor variations within standard engineering tolerances without affecting circuit performance.

Parameter Comparison

Engineering Selection Recommendations

FR203G (Taiwan Semiconductor Corporation) - Direct Substitute

The FR203G meets all primary electrical and mechanical matching criteria for direct substitution of the FR203. Both components share identical voltage ratings (200 V), current ratings (2 A), package configuration (DO-204AC/DO-15 axial), and fast recovery characteristics (150 ns trr).

The FR203G is classified as an active product with current manufacturing and inventory availability (725 pcs in stock), addressing the supply limitation of the obsolete FR203. The forward voltage differential (1.3 V versus 1.2 V at 2 A) represents a 0.1 V increase within standard rectifier diode operating tolerances and does not preclude functional equivalence.

The FR203G provides an extended operating temperature range (-55°C to 150°C versus -65°C to 125°C), offering broader thermal performance capability. ROHS3 compliance certification on the FR203G ensures alignment with current environmental and regulatory standards.

Both components carry identical reverse leakage current specifications (5 µA @ 200 V) and REACH unaffected status, confirming material composition compatibility.

Frequently Asked Questions (FAQ)

Q: Can the FR203G replace the FR203 in existing circuit designs?

A: Yes. The FR203G satisfies all primary electrical parameters (200 V reverse voltage, 2 A average rectified current, 150 ns reverse recovery time) and mechanical requirements (DO-15 axial through-hole package) required for direct substitution. The forward voltage increase of 0.1 V falls within standard rectifier diode operating tolerances.

Q: What is the primary reason for substituting the FR203?

A: The FR203 is classified as obsolete, limiting direct procurement availability. The FR203G is an active product with current manufacturing status and available inventory, ensuring reliable supply chain continuity.

Q: Are the packages physically identical?

A: Yes. Both the FR203 and FR203G use the DO-204AC/DO-15 axial through-hole package configuration, enabling direct mechanical interchange without PCB layout modifications.

Q: Does the FR203G meet current regulatory requirements?

A: Yes. The FR203G carries ROHS3 compliance certification, meeting current environmental and regulatory standards. Both components maintain REACH unaffected status.

Q: What is the significance of the operating temperature range difference?

A: The FR203G provides an extended operating temperature range (-55°C to 150°C) compared to the FR203 (-65°C to 125°C). This extended range offers broader thermal performance capability for applications operating at elevated temperatures. Applications within the FR203 temperature range operate within the FR203G specifications.

Q: Are there any electrical performance differences between the two diodes?

A: The primary electrical difference is forward voltage: FR203G operates at 1.3 V @ 2 A versus FR203 at 1.2 V @ 2 A. This 0.1 V differential is within standard rectifier diode tolerances. All other critical parameters (reverse voltage, current rating, reverse recovery time, reverse leakage current) are identical.

Q: Can the FR203G be used in high-frequency switching applications?

A: Both the FR203 and FR203G are classified as fast recovery diodes with 150 ns reverse recovery time and fast recovery speed classification (≤ 500 ns, > 200 mA). This specification supports high-frequency switching applications within the rated current and voltage parameters.