FR305 Equivalent & Substitute Parts

Part Overview

The FR305 is a general-purpose rectifier diode rated for 600 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. The original SMC Diode Solutions FR305 is classified as obsolete, necessitating identification of active equivalent and substitute parts from alternative manufacturers. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts operate within the same voltage and current ratings but may exhibit variations in secondary parameters such as recovery time, capacitance, or temperature range.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	3	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 3 A
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Package / Case	DO-201AD, Axial	—
Mounting Type	Through Hole	—
Operating Temperature - Junction	-65 to 150	°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the FR305 is determined by strict equivalence in the following critical parameters:

Voltage Rating: All substitute parts must maintain 600 V DC reverse voltage (Vr) maximum
Current Rating: All substitute parts must support 3 A average rectified current (Io)
Package: All substitute parts must use DO-201AD axial through-hole package for mechanical and electrical compatibility
Mounting Type: Through-hole mounting is required for direct board-level replacement

Secondary parameters including forward voltage (Vf), reverse recovery time (trr), reverse leakage current, capacitance, and operating temperature range may vary within acceptable engineering tolerances. Parts are grouped as direct equivalents when all primary parameters match exactly, and as similar substitutes when primary parameters align but secondary characteristics differ.

Parameter Comparison

Parameter	FR305 (SMC)	FR305G (TSC)	FR305G B0G (TSC)	FR305GP-TP (MCC)	P300J-E3/73 (Vishay)
Manufacturer	SMC Diode Solutions	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Micro Commercial Co	Vishay General Semiconductor
Product Status	Obsolete	Active	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	600 V	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	3 A	3 A	3 A	3 A	3 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 3 A	1.3 V @ 3 A	1.3 V @ 3 A	1.3 V @ 3 A	1.2 V @ 3 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Standard Recovery >500ns, > 200mA (Io)
Reverse Recovery Time (trr)	250 ns	250 ns	250 ns	250 ns	2 µs
Current - Reverse Leakage @ Vr	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V
Capacitance @ Vr, F	60 pF @ 4V, 1MHz	30 pF @ 4V, 1MHz	30 pF @ 4V, 1MHz	50 pF @ 5V, 1MHz	30 pF @ 4V, 1MHz
Package / Case	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial	DO-201AD, Axial
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Operating Temperature - Junction	-65 to 150 °C	-55 to 150 °C	-55 to 150 °C	-55 to 155 °C	-50 to 150 °C
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Equivalents (Primary Selection)

FR305G and FR305G B0G from Taiwan Semiconductor Corporation are direct electrical equivalents to the obsolete FR305. Both parts maintain identical voltage, current, forward voltage, recovery time, and leakage specifications. Both are active products with ROHS3 compliance and REACH unaffected status. FR305G is available in cut tape packaging with 3370 units in stock. FR305G B0G is available with 661 units in stock. Selection between these two variants depends on packaging requirements and inventory availability.

Functional Equivalent (Secondary Selection)

FR305GP-TP from Micro Commercial Co operates within identical voltage and current parameters with matching forward voltage and recovery time specifications. This part is active, ROHS3 compliant, and available in cut tape packaging with 2861 units in stock. Operating temperature range extends to 155 °C, providing enhanced thermal margin. Capacitance specification differs at 50 pF versus 30 pF, representing a secondary parameter variation acceptable for general-purpose rectification applications.

Substitute with Performance Variation (Tertiary Selection)

P300J-E3/73 from Vishay General Semiconductor maintains voltage, current, and leakage specifications but exhibits standard recovery characteristics (2 µs trr) compared to fast recovery (250 ns trr) of primary equivalents. Forward voltage is reduced to 1.2 V at 3 A. This part is active, ROHS3 compliant, and available with 715 units in stock. Selection of this part is appropriate only when application requirements do not demand fast recovery performance.

All substitute parts carry REACH unaffected status and MSL 1 (unlimited) moisture sensitivity rating, matching the original FR305 compliance profile.

Frequently Asked Questions (FAQ)

Q: Can FR305G directly replace the obsolete FR305?

A: Yes. FR305G from Taiwan Semiconductor Corporation is a direct electrical equivalent with identical voltage (600 V), current (3 A), forward voltage (1.3 V @ 3 A), and recovery time (250 ns) specifications. Both use DO-201AD axial through-hole packaging. The part is active and ROHS3 compliant.

Q: What is the difference between FR305G and FR305GP-TP?

A: Both parts meet the primary electrical requirements of 600 V, 3 A, and 250 ns recovery time. FR305GP-TP offers an extended operating temperature range to 155 °C versus 150 °C for FR305G. Capacitance differs at 50 pF (FR305GP-TP) versus 30 pF (FR305G). Both are active products in cut tape packaging.

Q: Is P300J-E3/73 a suitable replacement for FR305?

A: P300J-E3/73 maintains voltage, current, and leakage specifications but operates with standard recovery characteristics (2 µs) rather than fast recovery (250 ns). Forward voltage is 1.2 V versus 1.3 V. This part is suitable only for applications where fast recovery performance is not required.

Q: Are all substitute parts available in the same packaging?

A: All substitute parts use DO-201AD axial through-hole packaging for mechanical compatibility. Packaging format (cut tape, bulk, or tape and reel) varies by manufacturer and supplier. FR305G and FR305GP-TP are available in cut tape format. FR305G B0G and P300J-E3/73 packaging format is not specified in available data.

Q: Do substitute parts meet the same compliance standards as the original FR305?

A: All active substitute parts are ROHS3 compliant and REACH unaffected, matching the original FR305 compliance status. Moisture sensitivity level is MSL 1 (unlimited) for all parts, indicating no moisture sensitivity restrictions.

Q: What is the minimum operating temperature for substitute parts?

A: The original FR305 operates from -65 °C. Substitute parts operate from -55 °C (FR305G, FR305G B0G), -50 °C (P300J-E3/73), or -55 °C (FR305GP-TP). Applications requiring operation below -55 °C must use the original FR305 or confirm alternative part suitability with the circuit design.

Q: Can FR305GP-TP be used in high-temperature applications?

A: FR305GP-TP supports junction temperatures to 155 °C, providing 5 °C additional margin compared to other equivalents rated to 150 °C. This extended range is suitable for applications with elevated ambient or self-heating conditions.

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