FR154S-TP Equivalent & Substitute Parts

Part Overview

The FR154S-TP 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 through-hole axial package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The FR154S-TP operates across a junction temperature range of -55°C to 150°C and features fast recovery characteristics with a reverse recovery time of 150 ns. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating packaging and availability constraints.

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	V @ A
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 400 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	-
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

Substitute parts for the FR154S-TP are classified based on electrical parameter compatibility and packaging considerations. The primary substitution criterion is maintenance of the 400 V reverse voltage rating, which is non-negotiable for circuit protection and reliability. Secondary criteria include average rectified current capacity, forward voltage characteristics, and reverse recovery time performance.

Direct Substitutes maintain identical electrical specifications and differ only in package format or product status. The FR154GP-TP qualifies as a direct substitute, offering the same 400 V / 1.5 A rating in a DO-15 package variant with active product status.

Similar Substitutes maintain the 400 V voltage rating and fast recovery speed classification but differ in current capacity or recovery time characteristics. These parts are suitable when circuit design permits higher current ratings or improved recovery performance. The MUR240RLG (2 A, 65 ns trr), RGP10G (1 A, 150 ns trr), and UF4004 B0G (1 A, 50 ns trr) fall into this category.

Substitution logic is based strictly on:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 400 V
Current - Average Rectified (Io): Must equal or exceed 1.5 A for direct substitutes; may be lower for similar substitutes if circuit permits
Speed Classification: Must maintain Fast Recovery ≤ 500ns, > 200mA
Mounting Type: Through Hole required
Operating Temperature Range: Must encompass or exceed -55°C to 150°C

Parameter Comparison

Parameter	FR154S-TP	FR154GP-TP	MUR240RLG	RGP10G	UF4004 B0G
Manufacturer	Micro Commercial Co	Micro Commercial Co	onsemi	Fairchild Semiconductor	Taiwan Semiconductor Corporation
Product Status	Obsolete	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	1.5 A	1.5 A	2 A	1 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	1 V @ 1 A
Reverse Recovery Time (trr)	150 ns	150 ns	65 ns	150 ns	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V	5 µA @ 400 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41	DO-204AC, DO-15	DO-204AL, DO-41	DO-204AL, DO-41	DO-204AL, DO-41
Operating Temperature - Junction	-55 to 150°C	-55 to 150°C	-65 to 175°C	-65 to 175°C	-55 to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant
Inventory Status	739 Pcs	636 Pcs	10400 Pcs	17200 Pcs	626 Pcs

Engineering Selection Recommendations

FR154GP-TP is the primary direct substitute for FR154S-TP. Both parts are manufactured by Micro Commercial Co and maintain identical electrical specifications: 400 V reverse voltage, 1.5 A average rectified current, 1.3 V forward voltage at 1.5 A, and 150 ns reverse recovery time. The FR154GP-TP differs only in package format (DO-15 versus DO-41) and holds active product status, ensuring long-term availability. This part is suitable for direct replacement when PCB layout accommodates the DO-15 axial package. RoHS3 compliance is maintained.

MUR240RLG is a similar substitute manufactured by onsemi with active product status and extended temperature range (-65°C to 175°C). This part exceeds the FR154S-TP specification with 2 A average rectified current and improved reverse recovery time of 65 ns. The MUR240RLG is packaged in DO-41 format, matching the original FR154S-TP package. Selection of MUR240RLG is appropriate when higher current capacity or faster recovery performance provides circuit benefits. RoHS3 compliance is maintained. Inventory availability is significantly higher at 10,400 pieces.

RGP10G is a similar substitute manufactured by Fairchild Semiconductor with active product status. This part maintains the 400 V rating and 150 ns reverse recovery time but is rated for 1 A average rectified current, which is below the FR154S-TP specification of 1.5 A. RGP10G is suitable only when circuit design operates at reduced current levels. The part is packaged in DO-41 format. Inventory availability is high at 17,200 pieces.

UF4004 B0G is a similar substitute manufactured by Taiwan Semiconductor Corporation with active product status. This part maintains the 400 V rating and is rated for 1 A average rectified current with improved reverse recovery time of 50 ns and lower forward voltage of 1 V at 1 A. UF4004 B0G is suitable only when circuit design operates at reduced current levels. The part is packaged in DO-41 format. RoHS3 compliance and REACH compliance are maintained.

Selection priority is based on product status (active preferred over obsolete), compliance certifications (RoHS3 and REACH), and inventory availability. For applications requiring the full 1.5 A specification, FR154GP-TP or MUR240RLG are the only suitable options. For applications operating at 1 A or below, RGP10G or UF4004 B0G provide additional alternatives.

Frequently Asked Questions (FAQ)

Q: Can FR154GP-TP replace FR154S-TP directly in the circuit?

A: FR154GP-TP maintains identical electrical specifications (400 V, 1.5 A, 1.3 V forward voltage, 150 ns recovery time) and is suitable for direct circuit replacement. The primary difference is package format: FR154GP-TP uses DO-15 while FR154S-TP uses DO-41. PCB layout must accommodate the DO-15 axial package dimensions. Both parts are RoHS3 compliant.

Q: What is the difference between DO-41 and DO-15 packages?

A: Both are through-hole axial packages for diodes. DO-41 (DO-204AL) and DO-15 (DO-204AC) differ in physical dimensions and lead spacing. DO-15 is typically smaller. Substitution between these packages requires PCB layout verification to ensure component fit and spacing compliance.

Q: Can MUR240RLG be used instead of FR154S-TP?

A: MUR240RLG is electrically compatible at the 400 V rating and exceeds the FR154S-TP specification with 2 A current capacity and 65 ns reverse recovery time. MUR240RLG is packaged in DO-41 format, matching the original FR154S-TP package. This substitution is suitable when higher current capacity or improved recovery performance is beneficial or neutral to circuit operation. MUR240RLG has active product status and higher inventory availability.

Q: Why do RGP10G and UF4004 B0G have lower current ratings than FR154S-TP?

A: RGP10G and UF4004 B0G are rated for 1 A average rectified current, which is below the FR154S-TP specification of 1.5 A. These parts are suitable only for circuits designed to operate at 1 A or below. Using these parts in circuits requiring 1.5 A operation will result in component overstress and potential failure.

Q: What does "Fast Recovery ≤ 500ns, > 200mA" mean?

A: This classification indicates the diode exhibits fast recovery characteristics with reverse recovery time not exceeding 500 nanoseconds when switching currents greater than 200 milliamps. All substitute parts maintain this fast recovery classification, ensuring compatibility with switching applications.

Q: Are all substitute parts RoHS3 compliant?

A: FR154GP-TP, MUR240RLG, and UF4004 B0G are explicitly RoHS3 compliant. RGP10G compliance status is not specified in available documentation. For applications requiring RoHS3 certification, FR154GP-TP, MUR240RLG, or UF4004 B0G are recommended.

Q: Which substitute part has the best availability?

A: RGP10G has the highest inventory at 17,200 pieces, followed by MUR240RLG at 10,400 pieces. However, RGP10G is rated for only 1 A, limiting its use to circuits operating below the FR154S-TP specification. MUR240RLG provides both high availability and full electrical compatibility with current capacity exceeding the original specification.

Q: What is the operating temperature range for each substitute?

A: FR154S-TP, FR154GP-TP, and UF4004 B0G operate from -55°C to 150°C. MUR240RLG and RGP10G extend this range to -65°C to 175°C. For applications operating within -55°C to 150°C, all parts are suitable. For applications requiring extended temperature range, MUR240RLG or RGP10G are preferred.

Q: Can reverse recovery time differences affect circuit performance?

A: Reverse recovery time affects switching speed and efficiency in high-frequency applications. FR154S-TP and FR154GP-TP have 150 ns recovery time. MUR240RLG has 65 ns (faster), and UF4004 B0G has 50 ns (faster). Faster recovery times reduce switching losses and heat generation. Substituting with faster recovery parts generally improves performance; substituting with slower recovery parts may degrade performance in switching applications.

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