FR605-T Equivalent & Substitute Parts

Part Overview

The FR605-T is a general-purpose rectifier diode rated for 600 V DC reverse voltage and 6 A average rectified current, manufactured by Diodes Incorporated in an R-6 axial through-hole package. This component is classified as obsolete, necessitating identification of active equivalent and substitute parts for ongoing applications and new designs. Equivalent parts maintain identical electrical and mechanical specifications, while substitute parts provide functional alternatives with acceptable parameter variations within the application's tolerance envelope.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	6	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 6 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	10	µA @ 600 V
Mounting Type	Through Hole	—
Package / Case	R-6, Axial	—
Operating Temperature - Junction	-65°C ~ 175°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the FR605-T is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 600 V
Current - Average Rectified (Io): 6 A
Mounting Type: Through Hole
RoHS Status: ROHS3 Compliant

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: ≤ 1.3 V @ 6 A
Reverse Recovery Time (trr): ≤ 250 ns (fast recovery) or > 500 ns (standard recovery)
Current - Reverse Leakage @ Vr: ≤ 10 µA @ 600 V
Operating Temperature - Junction: Minimum -55°C, Maximum ≥ 150°C
Package / Case: R-6, DO-201AD, or P600 axial packages

Substitutes are grouped into two categories:

Direct Equivalents (Identical Specifications): FR605GP-AP and FR605GP-TP maintain the same electrical characteristics, fast recovery speed, and R-6 package as the original FR605-T.
Functional Alternatives (Parameter Variations): 60S6-TP, 6A6-TP, GI756-E3/73, and 1N5552 provide 600 V / 6 A capability with acceptable deviations in forward voltage, recovery speed, or package form factor.

Parameter Comparison

Parameter	FR605-T	FR605GP-AP	FR605GP-TP	60S6-TP	6A6-TP	GI756-E3/73	1N5552
Manufacturer	Diodes Inc.	Micro Commercial Co	Micro Commercial Co	Micro Commercial Co	Micro Commercial Co	Vishay	Solid State Inc.
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Active	Active
Vr (Max) [V]	600	600	600	600	600	600	600
Io [A]	6	6	6	6	6	6	3
Vf (Max) @ If [V]	1.3 @ 6A	1.3 @ 6A	1.3 @ 6A	1.0 @ 6A	0.95 @ 6A	0.9 @ 6A	1.0 @ 3A
Speed	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns
trr [ns]	250	250	250	—	—	2500	2000
Ir @ Vr [µA]	10 @ 600V	10 @ 600V	10 @ 600V	5 @ 600V	10 @ 600V	5 @ 600V	1 @ 600V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	R-6, Axial	R-6, Axial	R-6, Axial	DO-201AD, Axial	R-6, Axial	P600, Axial	Axial
Tj (Operating) [°C]	-65 ~ 175	-55 ~ 150	-55 ~ 150	-55 ~ 150	-55 ~ 125	-50 ~ 150	-65 ~ 200
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Inventory Status	708 Pcs	1075 Pcs	743 Pcs	5572 Pcs	1393 Pcs	6252 Pcs	2100 Pcs

Engineering Selection Recommendations

For Direct Replacement (Identical Specifications):

FR605GP-AP and FR605GP-TP are the primary equivalents for the obsolete FR605-T. Both parts are manufactured by Micro Commercial Co, maintain active product status, and provide identical electrical performance with fast recovery characteristics (250 ns trr) and 1.3 V forward voltage at 6 A. The distinction between these two is packaging format: FR605GP-AP is supplied in cut tape, while FR605GP-TP is supplied in tape and reel. Both are ROHS3 compliant and suitable for new designs.

For Functional Substitution with Parameter Trade-offs:

60S6-TP provides 6 A / 600 V capability in a DO-201AD package with improved forward voltage (1.0 V @ 6 A) and lower reverse leakage (5 µA @ 600 V). This part uses standard recovery characteristics (> 500 ns) rather than fast recovery, which may affect switching performance in high-frequency applications.

GI756-E3/73 (Vishay) offers 6 A / 600 V in a P600 package with the lowest forward voltage (0.9 V @ 6 A) and reduced reverse leakage (5 µA @ 600 V). Standard recovery speed (2.5 µs trr) and narrower operating temperature range (-50°C to 150°C) require application verification.

6A6-TP is marked "Not For New Designs" and should be used only for legacy system maintenance where R-6 package compatibility is mandatory and performance trade-offs are acceptable.

1N5552 is a 3 A part and is not suitable for applications requiring the full 6 A rating of the FR605-T.

Compliance Considerations:

All substitute parts maintain ROHS3 compliance. FR605GP-AP and FR605GP-TP are REACH unaffected, while the original FR605-T is REACH affected. For applications subject to REACH restrictions, FR605GP-AP or FR605GP-TP are preferred.

Frequently Asked Questions (FAQ)

Q: Can FR605GP-AP or FR605GP-TP be used as direct replacements for FR605-T?

A: Yes. Both parts are electrically and mechanically identical to the FR605-T, with 600 V reverse voltage, 6 A current rating, fast recovery (250 ns), and R-6 axial package. Both are active products suitable for new designs.

Q: What is the difference between FR605GP-AP and FR605GP-TP?

A: The electrical specifications are identical. FR605GP-AP is supplied in cut tape (CT) packaging, while FR605GP-TP is supplied in tape and reel (TR) packaging. Selection depends on assembly process requirements and volume.

Q: Can 60S6-TP replace FR605-T in all applications?

A: 60S6-TP is electrically compatible for 600 V / 6 A applications but uses a different package (DO-201AD instead of R-6) and standard recovery speed (> 500 ns) instead of fast recovery (250 ns). Package compatibility must be verified for PCB layout. Applications sensitive to switching speed or recovery time require evaluation.

Q: Why is 1N5552 listed as a substitute if it is only rated for 3 A?

A: 1N5552 is included in the substitute list but is not suitable for applications requiring the full 6 A rating of FR605-T. It may be used only in applications where the actual current demand does not exceed 3 A.

Q: What are the key differences between fast recovery and standard recovery diodes?

A: Fast recovery diodes (FR605-T, FR605GP-AP, FR605GP-TP) have reverse recovery times ≤ 500 ns, reducing switching losses in high-frequency circuits. Standard recovery diodes (60S6-TP, 6A6-TP, GI756-E3/73) have trr > 500 ns and are suitable for lower-frequency or DC applications. Selection depends on circuit operating frequency.

Q: Is 6A6-TP recommended for new designs?

A: No. 6A6-TP is marked "Not For New Designs" and should be used only for maintenance of existing systems. FR605GP-AP or FR605GP-TP are the recommended alternatives for new designs.

Q: What is the impact of forward voltage differences between substitute parts?

A: Forward voltage variations (0.9 V to 1.3 V @ 6 A) affect power dissipation and thermal performance. Lower forward voltage (GI756-E3/73 at 0.9 V) reduces heat generation, while higher forward voltage (FR605-T, FR605GP series at 1.3 V) increases dissipation. Thermal design and power budget must be verified for each substitute.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant. However, REACH status varies: FR605GP-AP and FR605GP-TP are REACH unaffected, while the original FR605-T is REACH affected. For applications subject to REACH restrictions, FR605GP series is preferred.

Q: Can GI756-E3/73 be used in applications with operating temperatures above 150°C?

A: No. GI756-E3/73 has a maximum junction temperature of 150°C, which is lower than FR605-T (175°C) and 1N5552 (200°C). Applications requiring operation above 150°C require alternative selection or thermal management verification.

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