FR154 Equivalent & Substitute Parts

Part Overview

The FR154 is a general-purpose rectifier diode rated for 400 V DC reverse voltage and 1.5 A average rectified current in a DO-15 through-hole package. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance applications. The FR154 features fast recovery characteristics with a reverse recovery time of 150 ns, suitable for standard rectification circuits requiring moderate voltage and current ratings.

Substiute Parts

FR154

SMC Diode SolutionsIn Stock: 2138FR154 Datasheet

Current PartRFQ

FR154G

Taiwan Semiconductor CorporationIn Stock: 885FR154G Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FR154 is determined by electrical and mechanical parameter equivalence. The primary substitute FR154G maintains identical electrical specifications across all critical parameters: 400 V reverse voltage rating, 1.5 A average rectified current, 1.3 V forward voltage drop at rated current, and 150 ns reverse recovery time. Both parts utilize through-hole mounting with DO-15 package designation and identical reverse leakage characteristics.

The substitution logic is based on the following key parameters:

• Voltage - DC Reverse (Vr) (Max): 400 V
• Current - Average Rectified (Io): 1.5 A
• Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 1.5 A
• Reverse Recovery Time (trr): 150 ns
• Current - Reverse Leakage @ Vr: 5 µA @ 400 V
• Mounting Type: Through Hole
• Package / Case: DO-15 / DO-204AC

Parameter Comparison

Engineering Selection Recommendations

The FR154G from Taiwan Semiconductor Corporation is the direct equivalent substitute for the obsolete FR154. Both components share identical electrical performance specifications and package configurations. The FR154G holds active product status, ensuring continued availability and supply chain reliability compared to the obsolete FR154.

The FR154G is RoHS3 compliant, providing regulatory advantage for new designs and manufacturing environments subject to hazardous substance restrictions. Both parts maintain REACH Unaffected status and EAR99 export classification, with identical HTSUS commodity codes.

The operating temperature range of the FR154G extends from -55°C to 150°C, compared to the FR154's -65°C to 150°C. This represents a 10°C reduction in minimum operating temperature. For applications requiring operation below -55°C, the FR154 specifications must be verified against actual circuit requirements.

Capacitance at rated voltage shows a minor difference: FR154G specifies 20 pF at 4 V, 1 MHz compared to the FR154's 30 pF at the same conditions. This difference is not significant for standard rectification applications but should be evaluated in high-frequency or sensitive analog circuits.

Frequently Asked Questions (FAQ)

Q: Can FR154G directly replace FR154 in existing circuit designs?

A: Yes. The FR154G maintains identical electrical specifications for voltage rating, current capacity, forward voltage drop, and reverse recovery time. Both components use through-hole mounting with DO-15 package designation. Physical and electrical compatibility is confirmed across all critical parameters.

Q: What is the significance of the FR154's obsolete status?

A: Obsolete status indicates the FR154 is no longer manufactured or supported by the original supplier. The FR154G provides an active, currently manufactured alternative with equivalent electrical and mechanical characteristics, ensuring long-term supply availability.

Q: Are there differences in packaging between FR154 and FR154G?

A: Both parts use DO-15 / DO-204AC axial through-hole packages. The FR154G is supplied in Cut Tape (CT) packaging, while the FR154 packaging format is not specified in available data. Both are compatible with standard through-hole PCB assembly processes.

Q: Does the operating temperature range difference affect substitution?

A: The FR154G minimum operating temperature is -55°C compared to the FR154's -65°C. For applications operating above -55°C, no thermal limitation exists. Applications requiring operation below -55°C must verify circuit requirements against the FR154G specification.

Q: What compliance advantages does FR154G provide?

A: The FR154G is RoHS3 compliant, meeting current hazardous substance restrictions. Both parts maintain REACH Unaffected status and identical export classifications (EAR99). The FR154G is recommended for new designs subject to environmental and regulatory compliance requirements.

Q: Is the capacitance difference between FR154 and FR154G significant?

A: The FR154G specifies 20 pF at 4 V, 1 MHz compared to the FR154's 30 pF. For standard rectification circuits, this 10 pF difference is not functionally significant. High-frequency applications or circuits with sensitive analog signal paths should evaluate this parameter against specific design requirements.

Q: What inventory status should influence component selection?

A: The FR154G maintains 846 pieces in current stock with active product status, ensuring reliable supply for ongoing production. The FR154 shows 2100 pieces in inventory but is obsolete, making it unsuitable for new procurement despite current availability.