FR301-T Equivalent & Substitute Parts

Part Overview

The FR301-T is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 50 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The FR301-T features fast recovery characteristics with a reverse recovery time of 150 ns, forward voltage of 1.3 V at 3 A, and operates across a junction temperature range of -65°C to 175°C. RoHS3 compliance and unlimited moisture sensitivity rating support deployment in industrial and commercial applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	10	µA @ 50 V
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-65 to 175	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the FR301-T is determined by matching the following critical electrical and mechanical parameters:

Electrical Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 3 A minimum
Mounting Type: Through Hole
Package / Case: DO-201AD or equivalent axial package

Recovery Characteristics: Substitute parts are grouped into two categories based on recovery speed:

Fast Recovery (≤ 500ns): Direct functional equivalents with identical switching performance
Standard Recovery (> 500ns): Acceptable substitutes with slower reverse recovery, suitable for non-critical switching applications

Compliance Considerations:

RoHS3 compliance preferred for new designs
REACH status evaluated for regulatory alignment
Operating temperature range must accommodate application requirements

Substitutes meeting all electrical parameters within the specified voltage and current ratings are electrically compatible with the FR301-T, regardless of minor variations in forward voltage, reverse leakage, or recovery time, provided the application does not impose strict switching frequency or thermal constraints.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf @ If	Speed	trr	Ir @ Vr	Package	Temp Range	Status	RoHS
FR301-T	Diodes Inc.	50 V	3 A	1.3 V @ 3 A	Fast ≤ 500ns	150 ns	10 µA @ 50 V	DO-201AD	-65 to 175°C	Obsolete	ROHS3
1N5400-G	Comchip Tech.	50 V	3 A	1 V @ 3 A	Standard > 500ns	—	5 µA @ 50 V	DO-201AD	-65 to 125°C	Active	ROHS3
1N5400G	Taiwan Semi.	50 V	3 A	1.1 V @ 3 A	Standard > 500ns	—	5 µA @ 50 V	DO-201AD	-55 to 150°C	Active	ROHS3
1N5400RLG	onsemi	50 V	3 A	1 V @ 3 A	Standard > 500ns	—	10 µA @ 50 V	DO-201AA, DO-27	-65 to 150°C	Not For New Designs	ROHS3
1N5415	Microchip Tech.	50 V	3 A	1.5 V @ 9 A	Fast ≤ 500ns	150 ns	1 µA @ 50 V	B, Axial	-65 to 175°C	Active	Non-compliant
1N5802	Microchip Tech.	50 V	1 A	875 mV @ 1 A	Fast ≤ 500ns	25 ns	1 µA @ 50 V	A, Axial	-65 to 175°C	Active	Non-compliant
EGP30A	Fairchild Semi.	50 V	3 A	950 mV @ 3 A	Fast ≤ 500ns	50 ns	5 µA @ 50 V	DO-201AD	-65 to 150°C	Active	—
FR301GP-AP	Micro Commercial	50 V	3 A	1.3 V @ 3 A	Fast ≤ 500ns	150 ns	5 µA @ 50 V	DO-201AD	-55 to 150°C	Active	ROHS3
GI500-E3/54	Vishay Gen. Semi.	50 V	3 A	1.1 V @ 9.4 A	Standard > 500ns	2 µs	5 µA @ 50 V	DO-201AD	-50 to 150°C	Active	ROHS3
GP30A-E3/54	Vishay Gen. Semi.	50 V	3 A	1.2 V @ 3 A	Standard > 500ns	5 µs	5 µA @ 50 V	DO-201AD	-65 to 175°C	Active	ROHS3
HER301GA-G	Comchip Tech.	50 V	3 A	1 V @ 3 A	Fast ≤ 500ns	50 ns	5 µA @ 50 V	DO-201AA, DO-27	-55 to 150°C	Active	ROHS3

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

The following parts are recommended as direct replacements for the obsolete FR301-T:

FR301GP-AP (Micro Commercial Co): Maintains identical electrical characteristics (1.3 V forward voltage, 150 ns recovery time) with active product status and RoHS3 compliance. Operating temperature range of -55°C to 150°C covers most industrial applications.
HER301GA-G (Comchip Technology): Fast recovery diode with 50 ns reverse recovery time, superior to the original FR301-T. Active status and RoHS3 compliance. Operating temperature limited to -55°C to 150°C.
EGP30A (Fairchild Semiconductor): Fast recovery characteristics with 50 ns trr and lowest forward voltage (950 mV @ 3 A). Active product status with extensive inventory availability.

Secondary Substitutes (Acceptable for Non-Critical Applications):

1N5400G (Taiwan Semiconductor Corporation): Standard recovery diode with active status and RoHS3 compliance. Operating temperature range -55°C to 150°C. Forward voltage 1.1 V @ 3 A represents acceptable performance trade-off.
GI500-E3/54 (Vishay General Semiconductor): Standard recovery with active status and RoHS3 compliance. Extended operating temperature range -50°C to 150°C. Longer reverse recovery time (2 µs) suitable for low-frequency rectification.
GP30A-E3/54 (Vishay General Semiconductor): SUPERECTIFIER® series with active status and RoHS3 compliance. Extended operating temperature range -65°C to 175°C matches original FR301-T. Standard recovery characteristics.

Not Recommended for New Designs:

1N5400RLG (onsemi): Marked "Not For New Designs" despite active inventory and RoHS3 compliance.
1N5415 (Microchip Technology): RoHS non-compliant status disqualifies from new design consideration.
1N5802 (Microchip Technology): Current rating of 1 A is insufficient for 3 A application requirements. RoHS non-compliant.

Frequently Asked Questions (FAQ)

Q: Can I use a standard recovery diode as a substitute for the fast recovery FR301-T?

A: Standard recovery diodes (reverse recovery time > 500ns) are electrically compatible with the FR301-T in rectification applications where switching frequency is not a limiting factor. However, in high-frequency switching circuits, the longer recovery time may introduce additional switching losses and heat generation. Application-specific circuit analysis is required to determine acceptability.

Q: What is the difference between DO-201AD and DO-27 packages?

A: DO-201AD and DO-27 are equivalent axial through-hole package designations used by different manufacturers. Both packages are mechanically and electrically interchangeable for PCB mounting and circuit operation. Comchip Technology designates their equivalent package as DO-27, while other manufacturers use DO-201AD nomenclature.

Q: Why is the 1N5802 listed as a substitute if it has only 1 A current rating?

A: The 1N5802 is not a suitable substitute for the FR301-T due to insufficient current rating (1 A versus 3 A required). This part appears in the substitute list of other equivalent parts but does not meet the electrical requirements for direct FR301-T replacement.

Q: Are all RoHS3-compliant substitutes suitable for my application?

A: RoHS3 compliance indicates regulatory alignment for hazardous substance restrictions but does not guarantee functional equivalence. Verify that voltage rating, current rating, recovery characteristics, and operating temperature range match your specific circuit requirements before selection.

Q: What is the significance of reverse recovery time in selecting a substitute?

A: Reverse recovery time (trr) determines how quickly the diode transitions from conducting to blocking state. Fast recovery diodes (≤ 500ns) minimize switching losses in high-frequency applications. Standard recovery diodes (> 500ns) are suitable for low-frequency rectification but generate more heat during switching transitions.

Q: Can I substitute the FR301-T with a part rated for higher voltage or current?

A: Yes. A diode rated for higher voltage (e.g., 100 V) or higher current (e.g., 6 A) will function correctly in a circuit designed for 50 V, 3 A operation. The higher ratings provide design margin and may improve reliability. However, verify that package dimensions and thermal characteristics remain compatible with your PCB layout and thermal management strategy.

Q: Which substitute offers the best thermal performance?

A: The EGP30A offers the lowest forward voltage (950 mV @ 3 A) and shortest reverse recovery time (50 ns), resulting in minimal power dissipation and heat generation. The FR301GP-AP maintains identical thermal characteristics to the original FR301-T (1.3 V, 150 ns).

Q: Is operating temperature range a critical selection factor?

A: Operating temperature range becomes critical only if your application requires operation at the extremes of the specified range. The original FR301-T operates to 175°C junction temperature. Most active substitutes limit operation to 150°C. If your circuit operates near or above 150°C, select GP30A-E3/54 or FR301GP-AP to maintain the full -65°C to 175°C range.

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