FR105-TP Equivalent & Substitute Parts

Part Overview

The FR105-TP is a general-purpose rectifier diode rated for 600 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. Manufactured by Micro Commercial Co, this component is classified as obsolete. Due to its obsolete product status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the same electrical specifications and mechanical compatibility while offering active product status and improved availability.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	600 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A
Reverse Recovery Time (trr)	250 ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the FR105-TP are classified into two categories based on electrical and mechanical compatibility:

Direct Manufacturer Equivalents maintain identical electrical specifications and packaging. These parts are sourced from the same manufacturer (Micro Commercial Co) and differ only in packaging format (Tape & Reel versus bulk).

Parametric Equivalents meet all critical electrical parameters: 600 V reverse voltage, 1 A average rectified current, fast recovery speed (≤500 ns for >200 mA), and through-hole DO-41 package compatibility. These parts may originate from different manufacturers but satisfy the functional requirements of the FR105-TP.

Similar Parts share the same voltage and current ratings with DO-41 package compatibility but may exhibit variations in secondary parameters such as reverse recovery time, capacitance, or operating temperature range. These parts are suitable for applications where the primary electrical specifications are the determining factors.

The substitution logic is based strictly on the following parameters:

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 1 A
Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, Axial
Speed: Fast Recovery ≤500 ns, >200 mA (Io)

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	trr	Ir @ Vr	Package	Status
FR105-TP	Micro Commercial Co	600 V	1 A	1.3 V @ 1 A	250 ns	5 µA @ 600 V	DO-41	Obsolete
FR105GP-TP	Micro Commercial Co	600 V	1 A	1.3 V @ 1 A	250 ns	5 µA @ 600 V	DO-41	Active
1N4937GP-TP	Micro Commercial Co	600 V	1 A	1.2 V @ 1 A	200 ns	5 µA @ 600 V	DO-41	Active
SF18G-TP	Micro Commercial Co	600 V	1 A	1.3 V @ 1 A	35 ns	5 µA @ 600 V	DO-41	Active
1N4937RLG	onsemi	600 V	1 A	1.2 V @ 1 A	300 ns	5 µA @ 600 V	Axial	Not For New Designs
BA158-E3/53	Vishay General Semiconductor - Diodes Division	600 V	1 A	1.3 V @ 1 A	250 ns	5 µA @ 600 V	DO-204AL (DO-41)	Active
BA158-E3/54	Vishay General Semiconductor - Diodes Division	600 V	1 A	1.3 V @ 1 A	250 ns	5 µA @ 600 V	DO-204AL (DO-41)	Active
MUR260RLG	onsemi	600 V	2 A	1.35 V @ 2 A	75 ns	5 µA @ 600 V	Axial	Active
FR105G	Taiwan Semiconductor Corporation	600 V	1 A	1.3 V @ 1 A	250 ns	5 µA @ 600 V	DO-204AL (DO-41)	Active
FR105G A0G	Taiwan Semiconductor Corporation	600 V	1 A	1.3 V @ 1 A	250 ns	5 µA @ 600 V	DO-204AL (DO-41)	Active
FR105G R1G	Taiwan Semiconductor Corporation	600 V	1 A	1.3 V @ 1 A	250 ns	5 µA @ 600 V	DO-204AL (DO-41)	Active

Engineering Selection Recommendations

Primary Recommendation: FR105GP-TP

The FR105GP-TP is the direct equivalent from Micro Commercial Co with active product status. This part maintains identical electrical specifications to the FR105-TP and differs only in packaging format (Tape & Reel). Selection of this part ensures no design modifications are required and provides the highest compatibility with existing circuit designs.

Secondary Recommendations: FR105G, FR105G A0G, FR105G R1G

These parts are manufactured by Taiwan Semiconductor Corporation and are parametric equivalents with active product status. All three variants maintain the 600 V reverse voltage, 1 A average rectified current, and DO-41 package compatibility. These parts are suitable for direct substitution in applications where the primary electrical specifications determine component selection.

Alternative Recommendations: BA158-E3/53, BA158-E3/54

The BA158 series from Vishay General Semiconductor - Diodes Division provides active product status with identical electrical specifications. The BA158-E3/54 variant offers significantly higher inventory availability (25,653 pieces) compared to other alternatives. Both variants are suitable for applications requiring 600 V, 1 A rectification in DO-41 package format.

Consideration: 1N4937GP-TP

The 1N4937GP-TP offers improved reverse recovery time (200 ns versus 250 ns) and slightly lower forward voltage (1.2 V versus 1.3 V at 1 A), resulting in reduced power dissipation. This part is suitable for applications where faster switching or lower heat generation is beneficial.

Consideration: SF18G-TP

The SF18G-TP provides the fastest reverse recovery time (35 ns) among available substitutes, making it suitable for high-frequency switching applications. This part is recommended only when the application requires superior switching performance.

Not Recommended for New Designs: 1N4937RLG, MUR260RLG

The 1N4937RLG carries a "Not For New Designs" status and should not be selected for new applications. The MUR260RLG, while active, is rated for 2 A average rectified current, exceeding the 1 A requirement of the FR105-TP and introducing unnecessary cost and thermal considerations.

Frequently Asked Questions (FAQ)

Q: Can FR105GP-TP directly replace FR105-TP without circuit modifications?

A: Yes. The FR105GP-TP is a direct manufacturer equivalent with identical electrical specifications (600 V reverse voltage, 1 A average rectified current, 250 ns reverse recovery time) and DO-41 package compatibility. The only difference is packaging format (Tape & Reel versus bulk). No circuit modifications are required.

Q: What is the difference between FR105G and FR105G A0G?

A: Both parts are manufactured by Taiwan Semiconductor Corporation and maintain identical electrical specifications and operating temperature range (-55°C to 150°C). The designations represent different manufacturing date codes or internal revisions. Both are suitable for direct substitution of the FR105-TP.

Q: Why is MUR260RLG listed as a similar part if it has 2 A current rating?

A: The MUR260RLG shares the same 600 V reverse voltage rating and DO-41 package compatibility. However, its 2 A average rectified current rating exceeds the 1 A requirement of the FR105-TP. This part is suitable for applications requiring higher current capacity but introduces unnecessary cost and thermal dissipation for 1 A applications.

Q: Can BA158-E3/53 and BA158-E3/54 be used interchangeably?

A: Both BA158 variants maintain identical electrical specifications and DO-41 package compatibility. The primary difference is packaging format and inventory availability. BA158-E3/54 is available in significantly higher quantities (25,653 pieces) and is supplied in Cut Tape format. Selection between these variants depends on packaging requirements and supply chain considerations.

Q: What is the advantage of 1N4937GP-TP over FR105GP-TP?

A: The 1N4937GP-TP offers two electrical improvements: reverse recovery time of 200 ns (versus 250 ns) and forward voltage of 1.2 V at 1 A (versus 1.3 V). These characteristics result in faster switching and reduced power dissipation. Selection of 1N4937GP-TP is appropriate for applications where these performance improvements provide measurable benefits.

Q: Is SF18G-TP suitable for all applications requiring FR105-TP replacement?

A: The SF18G-TP is suitable for applications where its superior reverse recovery time (35 ns) provides performance benefits. However, its faster switching characteristics and different capacitance (20 pF versus 15 pF) may introduce different circuit behavior in some applications. Selection should be based on specific application requirements.

Q: What does "Not For New Designs" status mean for 1N4937RLG?

A: Parts designated "Not For New Designs" are in the final stages of product lifecycle and may have limited availability or planned discontinuation. These parts should not be selected for new circuit designs. Active alternatives such as 1N4937GP-TP should be used instead.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed maintain ROHS3 compliance, consistent with the FR105-TP. All parts are suitable for applications requiring RoHS compliance.

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

A: The FR105-TP and most substitute parts operate from -55°C to 150°C. The BA158-E3/53 extends to 175°C, and BA158-E3/54 operates to 125°C. Selection based on operating temperature range should match specific application requirements. For standard industrial applications within -55°C to 150°C, all parts are suitable.

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