FR105 Equivalent & Substitute Parts

Part Overview

The FR105 is a general-purpose rectifier diode rated for 600 V DC reverse voltage and 1 A average rectified current in a through-hole DO-41 package. Manufactured by SMC Diode Solutions, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the same electrical specifications 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
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
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	-65°C ~ 150°C

Substitute Part Grouping Explanation

Substitution for the FR105 is determined by the following critical parameters:

Electrical Specifications:

Voltage - DC Reverse (Vr) (Max): 600 V minimum
Current - Average Rectified (Io): 1 A minimum
Voltage - Forward (Vf) (Max) @ If: 1.3 V @ 1 A maximum
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr): 250 ns maximum

Mechanical Specifications:

Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, or Axial

Environmental Specifications:

Operating Temperature - Junction: -65°C ~ 150°C minimum range

Substitute parts are grouped into two categories:

Direct Equivalents (1:1 Replacement): Parts that match all electrical and mechanical specifications with identical current ratings (1 A) and identical or superior performance characteristics.

Parametric Equivalents (Higher Current Rating): Parts that exceed the 1 A current specification while maintaining all other electrical parameters. These parts are electrically compatible but provide additional current capacity.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	trr (ns)	Ir @ Vr	Package	Temp Range	Status
FR105	SMC Diode Solutions	600 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	250	5 µA @ 600 V	DO-41	-65°C ~ 150°C	Obsolete
FR105G	Taiwan Semiconductor Corporation	600 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	250	5 µA @ 600 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active
BA158GP-AP	Micro Commercial Co	600 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150	5 µA @ 600 V	DO-41	-65°C ~ 150°C	Active
BA158-E3/53	Vishay General Semiconductor - Diodes Division	600 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	250	5 µA @ 600 V	DO-204AL (DO-41)	-65°C ~ 175°C	Active
BA158-E3/54	Vishay General Semiconductor - Diodes Division	600 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	250	5 µA @ 600 V	DO-204AL (DO-41)	-65°C ~ 125°C	Active
1N4005GHR1G	Taiwan Semiconductor Corporation	600 V	1 A	1 V @ 1 A	Standard Recovery >500ns	—	5 µA @ 600 V	DO-204AL (DO-41)	-55°C ~ 150°C	Active
MUR260RLG	onsemi	600 V	2 A	1.35 V @ 2 A	Fast Recovery ≤ 500ns	75	5 µA @ 600 V	Axial	-65°C ~ 175°C	Active
STTH2R06RL	STMicroelectronics	600 V	2 A	1.7 V @ 2 A	Fast Recovery ≤ 500ns	50	2 µA @ 600 V	DO-41	-40°C ~ 175°C	Active

Engineering Selection Recommendations

Direct Equivalent Selection (1 A Current Rating):

FR105G (Taiwan Semiconductor Corporation) is the primary direct equivalent. It maintains identical electrical specifications including 600 V reverse voltage, 1 A current rating, 1.3 V forward voltage at 1 A, and 250 ns reverse recovery time. FR105G is active product status with RoHS3 compliance. The operating temperature range is -55°C ~ 150°C, which is narrower than the original FR105 (-65°C ~ 150°C) but suitable for most applications within the specified range.

BA158-E3/54 (Vishay General Semiconductor - Diodes Division) is an alternative direct equivalent with identical electrical specifications and active product status. It offers RoHS3 compliance and an extended upper operating temperature limit of 125°C. This part is available in high inventory (25,653 pcs) in Cut Tape packaging.

BA158-E3/53 (Vishay General Semiconductor - Diodes Division) provides identical electrical specifications with an extended upper operating temperature of 175°C, offering superior thermal performance. RoHS3 compliant and active product status.

BA158GP-AP (Micro Commercial Co) is a direct equivalent with identical electrical specifications and active product status. It features RoHS3 compliance and maintains the full operating temperature range of the original FR105 (-65°C ~ 150°C). Reverse recovery time is 150 ns, which is superior to the original 250 ns specification.

Parametric Equivalent Selection (2 A Current Rating):

MUR260RLG (onsemi) and STTH2R06RL (STMicroelectronics) are parametric equivalents with doubled current ratings (2 A). These parts maintain 600 V reverse voltage and fast recovery characteristics. MUR260RLG features 75 ns reverse recovery time and is available in Axial package. STTH2R06RL features 50 ns reverse recovery time and is available in DO-41 package. Both are active product status with RoHS3 compliance. These parts are suitable for applications requiring higher current capacity while maintaining voltage specifications.

Alternative Selection (Standard Recovery):

1N4005GHR1G (Taiwan Semiconductor Corporation) is an alternative with identical voltage and current ratings but standard recovery speed (>500ns). This part features automotive-grade qualification (AEC-Q101) and is suitable for applications where standard recovery speed is acceptable. It is active product status with RoHS3 compliance.

Compliance Considerations:

All recommended substitute parts are RoHS3 compliant and REACH unaffected. All parts maintain ECCN EAR99 and HTSUS 8541.10.0080 classifications. Moisture Sensitivity Level (MSL) is 1 (Unlimited) for all through-hole variants, indicating no special moisture handling requirements.

Frequently Asked Questions (FAQ)

Q: Can FR105G be used as a direct replacement for FR105?

A: Yes. FR105G maintains identical electrical specifications: 600 V reverse voltage, 1 A current rating, 1.3 V forward voltage at 1 A, and 250 ns reverse recovery time. Both are through-hole DO-41 package devices. The operating temperature range of FR105G (-55°C ~ 150°C) is narrower than FR105 (-65°C ~ 150°C), so verification is required if operation below -55°C is required.

Q: What is the difference between direct equivalents and parametric equivalents?

A: Direct equivalents (FR105G, BA158-E3/54, BA158-E3/53, BA158GP-AP) maintain the same 1 A current rating and all electrical specifications. Parametric equivalents (MUR260RLG, STTH2R06RL) have doubled current ratings (2 A) while maintaining 600 V reverse voltage and fast recovery characteristics. Parametric equivalents are suitable for applications requiring higher current capacity.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, meeting current environmental regulations.

Q: What is the significance of reverse recovery time (trr)?

A: Reverse recovery time indicates how quickly the diode transitions from conducting to blocking state. Lower trr values (50-75 ns for MUR260RLG and STTH2R06RL) result in faster switching and reduced switching losses, beneficial in high-frequency applications. The original FR105 and most direct equivalents specify 250 ns or lower.

Q: Can MUR260RLG or STTH2R06RL be used in place of FR105?

A: Yes, with consideration of current rating differences. Both parts maintain 600 V reverse voltage and fast recovery characteristics. MUR260RLG is rated for 2 A and available in Axial package. STTH2R06RL is rated for 2 A and available in DO-41 package. The higher current rating makes these parts suitable for applications requiring increased current capacity. Forward voltage specifications differ slightly due to the higher current rating.

Q: What packaging options are available?

A: Direct equivalents are available in DO-41 or DO-204AL (DO-41) through-hole packages. MUR260RLG is available in Axial package. All are through-hole mounting types suitable for PCB insertion.

Q: Is BA158GP-AP suitable for low-temperature applications?

A: Yes. BA158GP-AP maintains the full operating temperature range of the original FR105 (-65°C ~ 150°C), making it suitable for low-temperature applications down to -65°C.

Q: What is the difference between BA158-E3/53 and BA158-E3/54?

A: Both parts have identical electrical specifications and fast recovery characteristics. The primary difference is the upper operating temperature limit: BA158-E3/53 operates to 175°C, while BA158-E3/54 operates to 125°C. BA158-E3/54 has higher inventory availability (25,653 pcs vs. 623 pcs).

Q: Is 1N4005GHR1G a suitable replacement?

A: 1N4005GHR1G maintains 600 V reverse voltage and 1 A current rating with identical forward voltage (1 V @ 1 A). The key difference is standard recovery speed (>500ns) versus the fast recovery (≤500ns) of FR105. This part is suitable for applications where standard recovery speed is acceptable and automotive-grade qualification (AEC-Q101) is required.

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