FR302 Equivalent & Substitute Parts

Part Overview

The FR302 is a general-purpose rectifier diode rated for 100 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is classified as obsolete, making identification of active equivalent parts essential for ongoing design support and procurement continuity. Substitute parts must maintain electrical performance across voltage, current, and thermal specifications while accommodating the through-hole axial package format.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 3 A	V
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 100 V
Package / Case	DO-201AD, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
Technology	Standard	—
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—

Substitute Part Grouping Explanation

Substitution eligibility for the FR302 is determined by strict equivalence across the following parameters:

Voltage Rating: Reverse voltage must equal or exceed 100 V DC
Current Rating: Average rectified current must equal or exceed 3 A
Forward Voltage Drop: Maximum forward voltage at rated current must not exceed 1.3 V @ 3 A
Reverse Recovery Time: Must maintain fast recovery characteristics ≤ 500ns for > 200mA
Reverse Leakage: Maximum reverse leakage at rated voltage must not exceed 5 µA @ 100 V
Package Compatibility: Must use DO-201AD axial through-hole package
Temperature Range: Operating junction temperature range must support application requirements

The FR302G from Taiwan Semiconductor Corporation qualifies as a direct substitute, meeting all electrical specifications and package requirements while offering active product status.

Parameter Comparison

Parameter	FR302 (SMC Diode Solutions)	FR302G (Taiwan Semiconductor Corporation)	Match Status
Voltage - DC Reverse (Vr) (Max)	100 V	100 V	Equivalent
Current - Average Rectified (Io)	3 A	3 A	Equivalent
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A	1.3 V @ 3 A	Equivalent
Reverse Recovery Time (trr)	150 ns	150 ns	Equivalent
Current - Reverse Leakage @ Vr	5 µA @ 100 V	5 µA @ 100 V	Equivalent
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Equivalent
Package / Case	DO-201AD, Axial	DO-201AD, Axial	Equivalent
Mounting Type	Through Hole	Through Hole	Equivalent
Operating Temperature - Junction	-65°C ~ 150°C	-55°C ~ 150°C	FR302G Range Narrower at Lower Limit
Technology	Standard	Standard	Equivalent
Product Status	Obsolete	Active	Substitute is Active
RoHS Status	Not Specified	ROHS3 Compliant	Substitute Offers Compliance

Engineering Selection Recommendations

The FR302G from Taiwan Semiconductor Corporation is the direct equivalent substitute for the obsolete FR302. Both components share identical electrical specifications across voltage, current, forward voltage drop, and reverse recovery characteristics. The FR302G maintains the same DO-201AD axial through-hole package format, ensuring mechanical and electrical compatibility in existing circuit designs.

The FR302G offers the advantage of active product status, ensuring continued availability and manufacturing support. The component is ROHS3 compliant, meeting current environmental and regulatory requirements. The operating temperature range of the FR302G (-55°C ~ 150°C) is narrower at the lower limit compared to the FR302 (-65°C ~ 150°C); applications requiring operation below -55°C junction temperature must evaluate this specification against design requirements.

All electrical parameters remain within acceptable tolerance for direct substitution in applications originally designed for the FR302.

Frequently Asked Questions (FAQ)

Q: Can the FR302G be used as a direct replacement for the FR302 in existing designs?

A: Yes. The FR302G meets all electrical specifications of the FR302, including voltage rating, current capacity, forward voltage drop, and reverse recovery time. Both components use the DO-201AD axial through-hole package, ensuring mechanical compatibility. The primary consideration is the operating temperature range, which is narrower in the FR302G at the lower limit (-55°C versus -65°C).

Q: What is the significance of the DO-201AD package designation?

A: DO-201AD is an axial through-hole package format for discrete diodes. This package type is inserted through holes in a printed circuit board with leads extending from both ends of the component body. The FR302 and FR302G both use this package, ensuring they occupy the same board space and mounting configuration.

Q: Are there differences in capacitance between the FR302 and FR302G?

A: Yes. The FR302 has a capacitance of 60 pF @ 4V, 1MHz, while the FR302G has 30 pF @ 4V, 1MHz. This difference may affect high-frequency circuit behavior. Applications sensitive to diode capacitance should evaluate this parameter against circuit requirements.

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

A: This classification indicates the diode exhibits fast recovery characteristics with a reverse recovery time of 150 ns at currents exceeding 200 mA. Fast recovery diodes are suitable for switching applications and power conversion circuits where rapid switching transitions are required.

Q: Is the FR302G RoHS compliant?

A: Yes. The FR302G is ROHS3 compliant, meeting current environmental and regulatory standards for hazardous substance restrictions. The FR302 compliance status is not specified in available documentation.

Q: What is the minimum operating temperature for the FR302G?

A: The FR302G has a junction operating temperature range of -55°C to 150°C. Applications requiring operation below -55°C must use the original FR302 or identify alternative components with lower temperature ratings.

Q: Are there other substitute options besides the FR302G?

A: The FR302G is identified as the direct manufacturer equivalent. The substitute list references 1N5401-E3/73 as an additional option; however, detailed specifications for this component are not provided in the current documentation and must be evaluated separately against the FR302 electrical and package requirements.

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