FR305G Equivalent & Substitute Parts

Part Overview

The FR305G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 600 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is classified as a fast recovery diode with a reverse recovery time of 250 ns and is actively produced and stocked. Equivalent and substitute parts are identified based on matching or exceeding the electrical and mechanical specifications of the FR305G to ensure functional compatibility in circuit applications.

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	V
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Speed Classification	Fast Recovery ≤ 500ns	-
Mounting Type	Through Hole	-
Package / Case	DO-201AD, Axial	-
Operating Temperature - Junction	-55°C ~ 150°C	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the FR305G are grouped based on the following critical parameters that determine functional equivalence:

Primary Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 600 V minimum
Current - Average Rectified (Io): 3 A minimum
Package / Case: DO-201AD, Axial (through-hole)
Mounting Type: Through Hole
RoHS Status: ROHS3 Compliant

Secondary Compatibility Factors:

Voltage - Forward (Vf) (Max) @ If: ≤ 1.3 V @ 3 A or equivalent rating
Reverse Recovery Time (trr): ≤ 500 ns (fast recovery classification)
Operating Temperature Range: Minimum -55°C to 150°C
Technology: Standard rectifier diode technology

Parts are classified as Direct Equivalents when all primary and secondary criteria are met with identical or superior electrical performance. Parts are classified as Similar Substitutes when they meet primary criteria but may have variations in secondary parameters such as forward voltage, recovery time, or temperature range.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ If	trr (ns)	Ir @ Vr (µA)	Speed	Tj (°C)	Packaging
FR305G	Taiwan Semiconductor Corporation	600	3	1.3 @ 3A	250	5 @ 600V	Fast Recovery ≤ 500ns	-55 ~ 150	CT
FR305GP-TP	Micro Commercial Co	600	3	1.3 @ 3A	250	5 @ 600V	Fast Recovery ≤ 500ns	-55 ~ 155	CT
1N5406-E3/54	Vishay General Semiconductor - Diodes Division	600	3	1.2 @ 3A	-	5 @ 600V	Standard Recovery >500ns	-50 ~ 150	TR
1N5406-E3/73	Vishay General Semiconductor - Diodes Division	600	3	1.2 @ 3A	-	5 @ 600V	Standard Recovery >500ns	-50 ~ 150	CT
60S6-TP	Micro Commercial Co	600	6	1.0 @ 6A	-	5 @ 600V	Standard Recovery >500ns	-55 ~ 150	CT
GP30J-E3/54	Vishay General Semiconductor - Diodes Division	600	3	1.1 @ 3A	5000	5 @ 600V	Standard Recovery >500ns	-65 ~ 175	TR
GP30J-E3/73	Vishay General Semiconductor - Diodes Division	600	3	1.1 @ 3A	5000	5 @ 600V	Standard Recovery >500ns	-65 ~ 175	CT
MUR460-E3/54	Vishay General Semiconductor - Diodes Division	600	4	1.28 @ 4A	75	10 @ 600V	Fast Recovery ≤ 500ns	-65 ~ 175	CT
STTH3L06	STMicroelectronics	600	3	1.3 @ 3A	85	3 @ 600V	Fast Recovery ≤ 500ns	-55 ~ 175	CT
STTH3R06	STMicroelectronics	600	3	1.7 @ 3A	35	3 @ 600V	Fast Recovery ≤ 500ns	-55 ~ 175	CT
STTH3R06RL	STMicroelectronics	600	3	1.7 @ 3A	35	3 @ 600V	Fast Recovery ≤ 500ns	-55 ~ 175	CT

Engineering Selection Recommendations

Direct Equivalent:

FR305GP-TP (Micro Commercial Co) is a direct equivalent to FR305G. Both parts share identical electrical specifications including 600 V reverse voltage, 3 A average rectified current, 1.3 V forward voltage at 3 A, and 250 ns reverse recovery time. Both are fast recovery diodes in DO-201AD axial packages with ROHS3 compliance. FR305GP-TP operates across -55°C to 155°C, providing a 5°C extended upper temperature range compared to FR305G.

Fast Recovery Substitutes (Matched Speed Classification):

STTH3L06 (STMicroelectronics) and STTH3R06 (STMicroelectronics) are fast recovery diodes meeting the 600 V and 3 A specifications. STTH3L06 matches the 1.3 V forward voltage of FR305G with superior reverse recovery time of 85 ns. STTH3R06 exhibits higher forward voltage (1.7 V @ 3 A) but offers faster recovery at 35 ns. Both operate to 175°C maximum junction temperature and are ROHS3 compliant.

MUR460-E3/54 (Vishay General Semiconductor - Diodes Division) is a fast recovery diode rated for 4 A at 600 V, exceeding the 3 A requirement. It provides 75 ns reverse recovery time and operates across -65°C to 175°C. Forward voltage is 1.28 V @ 4 A. This part is suitable for applications requiring higher current margin.

Standard Recovery Substitutes (Different Speed Classification):

1N5406-E3/73 (Vishay General Semiconductor - Diodes Division) and 1N5406-E3/54 meet the 600 V and 3 A core requirements with lower forward voltage (1.2 V @ 3 A). These are standard recovery diodes with recovery time exceeding 500 ns, differing from the fast recovery classification of FR305G. 1N5406-E3/73 is supplied in cut tape packaging; 1N5406-E3/54 is supplied in tape and reel.

GP30J-E3/73 (Vishay General Semiconductor - Diodes Division) and GP30J-E3/54 are standard recovery diodes with 1.1 V forward voltage and extended temperature range (-65°C to 175°C). These parts feature significantly longer reverse recovery time (5 µs) compared to FR305G and are designated as SUPERECTIFIER® series components. Both are ROHS3 compliant.

Higher Current Substitute:

60S6-TP (Micro Commercial Co) is rated for 6 A at 600 V, providing double the current capacity of FR305G. Forward voltage is 1.0 V @ 6 A. This part is suitable for applications requiring higher current handling with the same voltage rating and package form factor.

All listed substitutes are active products with ROHS3 compliance and REACH unaffected status, matching the regulatory compliance of FR305G.

Frequently Asked Questions (FAQ)

Q: Can FR305GP-TP be used as a direct replacement for FR305G?

A: Yes. FR305GP-TP is a direct equivalent with identical electrical specifications (600 V, 3 A, 1.3 V forward voltage, 250 ns recovery time) and the same DO-201AD axial through-hole package. Both are fast recovery diodes with ROHS3 compliance. The only difference is the extended upper operating temperature of FR305GP-TP (155°C vs. 150°C).

Q: What is the difference between fast recovery and standard recovery diodes in this list?

A: Fast recovery diodes have reverse recovery time ≤ 500 ns, while standard recovery diodes exceed 500 ns. FR305G is classified as fast recovery (250 ns). Substitutes like 1N5406-E3/73 and GP30J-E3/73 are standard recovery diodes with longer recovery times (>500 ns and 5 µs respectively). Fast recovery diodes are preferred in high-frequency switching applications; standard recovery diodes are suitable for lower-frequency rectification.

Q: Can I use STTH3R06 instead of FR305G if my circuit operates at higher temperatures?

A: STTH3R06 operates to 175°C maximum junction temperature, compared to FR305G at 150°C, providing a 25°C margin. However, STTH3R06 has higher forward voltage (1.7 V @ 3 A) compared to FR305G (1.3 V @ 3 A). This 0.4 V difference affects power dissipation and heat generation. Substitution is permissible only if the circuit design accommodates the higher forward voltage drop.

Q: What is the difference between 1N5406-E3/54 and 1N5406-E3/73?

A: Both parts are electrically identical 600 V, 3 A standard recovery diodes with 1.2 V forward voltage. The difference is packaging: 1N5406-E3/54 is supplied in tape and reel (TR) format, while 1N5406-E3/73 is supplied in cut tape (CT) format. Both use DO-201AD axial packages and are ROHS3 compliant.

Q: Is 60S6-TP a suitable substitute for FR305G?

A: 60S6-TP meets the 600 V voltage requirement and exceeds the 3 A current requirement at 6 A. Both use DO-201AD axial through-hole packages. However, 60S6-TP is a standard recovery diode (>500 ns) compared to FR305G's fast recovery classification (250 ns). Substitution is appropriate for applications where higher current capacity is needed and switching frequency is not critical.

Q: Why do some substitutes have different reverse leakage currents?

A: Reverse leakage current (Ir) varies by manufacturer and diode technology. FR305G specifies 5 µA @ 600 V. STTH3L06 and STTH3R06 specify 3 µA @ 600 V, indicating lower leakage. MUR460-E3/54 specifies 10 µA @ 600 V, indicating higher leakage. Lower leakage is generally preferable in high-impedance circuits; higher leakage has minimal impact in most power rectification applications.

Q: Can I substitute GP30J-E3/54 for FR305G in a high-frequency switching circuit?

A: GP30J-E3/54 has a reverse recovery time of 5 µs, significantly longer than FR305G's 250 ns. This makes GP30J-E3/54 unsuitable for high-frequency switching applications where fast recovery is required. GP30J-E3/54 is better suited for low-frequency rectification or applications where recovery speed is not critical.

Q: Are all substitute parts available in the same packaging format as FR305G?

A: FR305G is supplied in cut tape (CT) packaging. Most substitutes are also available in cut tape format (FR305GP-TP, 1N5406-E3/73, 60S6-TP, GP30J-E3/73, MUR460-E3/54, STTH3L06, STTH3R06, STTH3R06RL). However, 1N5406-E3/54 and GP30J-E3/54 are supplied in tape and reel (TR) format. Verify packaging requirements before selection.

Q: What does ROHS3 compliance mean for these diodes?

A: ROHS3 compliance indicates the part meets the Restriction of Hazardous Substances Directive 3, restricting the use of specific hazardous materials including lead, mercury, cadmium, and certain flame retardants. All listed parts, including FR305G and its substitutes, are ROHS3 compliant, ensuring environmental and regulatory compliance for applications in restricted markets.

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