FR154S-AP Equivalent & Substitute Parts

Part Overview

The FR154S-AP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 1.5 A average rectified current in a DO-41 axial through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The FR154S-AP features fast recovery characteristics with a reverse recovery time of 150 ns, suitable for standard rectification applications requiring moderate current handling at 400 V operation.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 1.5 A	V
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5 @ 400 V	µA
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the FR154S-AP is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a minimum DC reverse voltage rating of 400 V to ensure safe operation in the original circuit.

Current Rating: Substitute parts must support the required average rectified current. Parts rated at or above 1.5 A are acceptable; parts rated below 1.5 A represent derating and are listed separately.

Package Compatibility: The original part uses DO-41 axial through-hole packaging. Substitutes in alternative through-hole packages (DO-15) are electrically equivalent but require mechanical board layout verification.

Recovery Characteristics: All substitutes maintain fast recovery classification (≤ 500 ns) with reverse recovery times at or below 150 ns, ensuring compatibility with switching applications.

Compliance: All substitute parts maintain ROHS3 compliance and EAR99 export classification consistent with the original part.

Substitutes are grouped into two categories: Direct Equivalent (identical electrical and thermal specifications with package variation) and Similar Specification (matching voltage and recovery characteristics with current or thermal parameter differences).

Parameter Comparison

Parameter	FR154S-AP (Main)	FR154GP-AP (Direct Equivalent)	MUR240RLG (Similar)	RGP10G (Similar)
Manufacturer	Micro Commercial Co	Micro Commercial Co	onsemi	Fairchild Semiconductor
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1.5 A	1.5 A	2 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1.5 A	1.3 V @ 1.5 A	1.3 V @ 2 A	1.3 V @ 1 A
Reverse Recovery Time (trr)	150 ns	150 ns	65 ns	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V
Speed Classification	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns
Package / Case	DO-204AL, DO-41	DO-204AC, DO-15	DO-204AL, DO-41	DO-204AL, DO-41
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-55 to 150 °C	-55 to 150 °C	-65 to 175 °C	-65 to 175 °C
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

FR154GP-AP (Direct Equivalent - Recommended for Primary Substitution)

The FR154GP-AP is the direct electrical equivalent of the FR154S-AP, manufactured by the same supplier (Micro Commercial Co) with identical voltage, current, and recovery specifications. This part is currently in active production status, ensuring long-term availability. The only difference is the package format: DO-15 (DO-204AC) versus DO-41 (DO-204AL). Both are axial through-hole packages with compatible lead spacing for standard PCB layouts. This part carries ROHS3 compliance and maintains the same operating temperature range. Selection of FR154GP-AP requires verification that the DO-15 package footprint is compatible with the existing board design.

MUR240RLG (Higher Current Capability)

The MUR240RLG, manufactured by onsemi, provides 400 V voltage rating with 2 A current capacity, exceeding the 1.5 A requirement of the original part. This part features superior reverse recovery time (65 ns versus 150 ns), reducing switching losses in high-frequency applications. The MUR240RLG maintains DO-41 axial packaging identical to the FR154S-AP, eliminating board layout concerns. Operating temperature range extends to 175 °C, providing thermal margin beyond the original specification. This part is suitable for applications requiring enhanced performance or thermal headroom. ROHS3 compliance and active production status ensure procurement continuity.

RGP10G (Lower Current Rating - Derating Application)

The RGP10G, manufactured by Fairchild Semiconductor, is rated for 1 A average rectified current at 400 V, representing a 33% current derating relative to the FR154S-AP. This part maintains identical reverse recovery time (150 ns) and forward voltage characteristics. The RGP10G uses DO-41 packaging matching the original part. This substitute is applicable only in circuits where the actual operating current does not exceed 1 A, providing cost optimization for lower-current applications. Extended operating temperature range (-65 to 175 °C) offers thermal performance improvement. Active production status and ROHS3 compliance are confirmed.

Frequently Asked Questions (FAQ)

Q: Can FR154GP-AP be used as a direct replacement for FR154S-AP without circuit modification?

A: FR154GP-AP is electrically identical to FR154S-AP with matching voltage, current, and recovery specifications. The primary difference is the package format (DO-15 versus DO-41). Both are axial through-hole packages. Direct substitution requires verification that the DO-15 package footprint and lead spacing are compatible with the existing PCB layout. No circuit modification is required if the package is mechanically compatible.

Q: What is the advantage of using MUR240RLG over FR154GP-AP?

A: MUR240RLG provides three technical advantages: (1) higher current rating (2 A versus 1.5 A), allowing operation with greater margin; (2) faster reverse recovery time (65 ns versus 150 ns), reducing switching losses and heat generation; (3) extended operating temperature range (-65 to 175 °C versus -55 to 150 °C). MUR240RLG maintains DO-41 packaging identical to the original FR154S-AP, eliminating board layout concerns. Selection depends on whether the application benefits from these performance enhancements.

Q: Is RGP10G suitable for all applications using FR154S-AP?

A: RGP10G is suitable only for applications where the actual average rectified current does not exceed 1 A. The 1 A rating represents a 33% reduction from the FR154S-AP specification of 1.5 A. If the circuit requires sustained current above 1 A, RGP10G will operate outside its rated specification. RGP10G is appropriate for cost optimization in lower-current applications or as a derating option for enhanced reliability margins.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. FR154GP-AP, MUR240RLG, and RGP10G are all ROHS3 compliant, matching the compliance status of the original FR154S-AP. All parts carry EAR99 export classification and HTSUS code 8541.10.0080.

Q: What is the impact of package format differences on circuit performance?

A: Package format (DO-41 versus DO-15) affects mechanical board layout and lead spacing but does not impact electrical performance. Both DO-41 and DO-15 are axial through-hole packages with similar lead diameters and spacing suitable for standard PCB hole patterns. Selection between packages depends on available board space and existing footprint design. Electrical characteristics, voltage rating, current capacity, and recovery time remain unchanged regardless of package format.

Q: Can MUR240RLG be used in applications designed for 1.5 A operation?

A: Yes. MUR240RLG is rated for 2 A average rectified current, exceeding the 1.5 A requirement. Operating at 1.5 A represents 75% of the MUR240RLG rating, providing operational margin. The faster reverse recovery time (65 ns) and extended temperature range offer performance benefits. MUR240RLG is a suitable upgrade for applications requiring enhanced performance or thermal headroom.

Q: What inventory status should influence part selection?

A: Inventory availability is provided for reference: FR154S-AP (1125 pcs), FR154GP-AP (1149 pcs), MUR240RLG (10400 pcs), and RGP10G (17200 pcs). Current inventory levels do not determine electrical suitability. Part selection should be based on electrical specifications, package compatibility, and compliance requirements. Inventory status may influence procurement lead time and cost considerations but does not affect technical compatibility.

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