FR606-T Equivalent & Substitute Parts

Part Overview

The FR606-T is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 800 V DC reverse voltage and 6 A average rectified current. The device features fast recovery characteristics with a reverse recovery time of 500 ns and is housed in an R-6 axial through-hole package. The FR606-T is classified as obsolete, necessitating identification of active equivalent and substitute components for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating packaging and recovery speed variations.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	6	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 6 A	V
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	10	µA @ 800 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 FR606-T is determined by the following critical parameters:

Mandatory Matching Criteria:

Voltage - DC Reverse (Vr) (Max): 800 V minimum
Current - Average Rectified (Io): 6 A minimum
Mounting Type: Through Hole
Package compatibility: R-6 axial or equivalent axial configurations

Acceptable Variation Parameters:

Voltage - Forward (Vf): Substitute parts may vary within ±0.3 V at rated current
Reverse Recovery Time (trr): Substitute parts may operate at standard recovery (>500 ns) or fast recovery (≤500 ns)
Current - Reverse Leakage: Substitute parts may vary within ±10 µA at rated voltage
Operating Temperature Range: Substitute parts may have reduced upper or lower temperature limits
Product Status: Active substitutes are preferred over obsolete or not-for-new-designs classifications

Package Considerations: Substitute parts in R-6 axial package provide direct mechanical and electrical compatibility. Parts in DO-201AD axial package provide electrical compatibility with minor footprint variation. Parts with reduced current ratings (3 A) are not suitable substitutes for 6 A applications.

Parameter Comparison

Parameter	FR606-T (Main)	1N5553	60S8-TP	6A08B-G	6A8-TP	FR606GP-AP
Manufacturer	Diodes Incorporated	Solid State Inc.	Micro Commercial Co	Comchip Technology	Micro Commercial Co	Micro Commercial Co
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V	800 V	800 V	800 V
Current - Average Rectified (Io)	6 A	3 A	6 A	6 A	6 A	6 A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 6 A	1.1 V @ 3 A	1 V @ 6 A	1 V @ 6 A	950 mV @ 6 A	1.3 V @ 6 A
Reverse Recovery Time (trr)	500 ns	4 µs	Not specified	Not specified	Not specified	500 ns
Current - Reverse Leakage @ Vr	10 µA @ 800 V	1 µA @ 800 V	5 µA @ 800 V	10 µA @ 800 V	10 µA @ 800 V	10 µA @ 800 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	R-6, Axial	Axial	DO-201AD, Axial	R-6, Axial	R-6, Axial	R-6, Axial
Operating Temperature - Junction	-65°C ~ 175°C	-65°C ~ 200°C	-55°C ~ 150°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 150°C
Product Status	Obsolete	Active	Active	Active	Not For New Designs	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full 6 A Rating):

FR606GP-AP (Micro Commercial Co) is the recommended primary substitute. This part maintains identical electrical specifications to the FR606-T, including 800 V reverse voltage, 6 A current rating, 1.3 V forward voltage at 6 A, and 500 ns reverse recovery time. The R-6 axial package provides direct mechanical compatibility. Operating temperature range is -55°C to 150°C, which is reduced from the original -65°C to 175°C. Product status is active, ensuring long-term availability.

60S8-TP (Micro Commercial Co) provides full electrical compatibility with 800 V reverse voltage and 6 A current rating. The DO-201AD axial package is mechanically compatible with R-6 applications. Forward voltage is reduced to 1 V at 6 A, and reverse recovery time is not specified (standard recovery >500 ns). Operating temperature range is -55°C to 150°C. Product status is active. Packaging is supplied in tape and reel format.

6A08B-G (Comchip Technology) maintains 800 V reverse voltage and 6 A current rating with R-6 axial package compatibility. Forward voltage is 1 V at 6 A. Operating temperature range is -55°C to 125°C, representing the most restricted upper temperature limit among active substitutes. Product status is active. Packaging is supplied in bulk format.

Secondary Substitute (Current Rating Limitation):

1N5553 (Solid State Inc.) is rated for 800 V reverse voltage but only 3 A average rectified current. This part is not suitable for applications requiring the full 6 A rating of the FR606-T. Forward voltage is 1.1 V at 3 A. Reverse recovery time is 4 µs (standard recovery). Operating temperature range is -65°C to 200°C. Product status is active.

Not Recommended for New Designs:

6A8-TP (Micro Commercial Co) maintains 800 V reverse voltage and 6 A current rating with R-6 axial package compatibility. Forward voltage is 950 mV at 6 A. However, product status is classified as "Not For New Designs," indicating this part is in end-of-life phase and should not be selected for new circuit designs.

Frequently Asked Questions (FAQ)

Q: Can 1N5553 be used as a direct replacement for FR606-T?

A: No. While 1N5553 matches the 800 V reverse voltage specification, it is rated for only 3 A average rectified current compared to the 6 A requirement of FR606-T. Using 1N5553 in a 6 A application will result in device failure or reduced reliability.

Q: What is the difference between R-6 and DO-201AD packages?

A: Both are axial through-hole packages suitable for PCB mounting. R-6 and DO-201AD are mechanically compatible variants with identical electrical performance. The primary difference is physical dimensions and lead spacing. 60S8-TP in DO-201AD package can be substituted for FR606-T in R-6 package with verification of PCB footprint compatibility.

Q: Why is FR606GP-AP the recommended substitute?

A: FR606GP-AP is manufactured by Micro Commercial Co and maintains identical electrical specifications to FR606-T: 800 V reverse voltage, 6 A current rating, 1.3 V forward voltage at 6 A, and 500 ns reverse recovery time. The R-6 axial package provides direct mechanical compatibility. Product status is active, ensuring availability for production and future orders.

Q: What is the impact of reduced operating temperature range in substitute parts?

A: FR606-T operates from -65°C to 175°C. Active substitutes (FR606GP-AP, 60S8-TP, 6A08B-G) operate from -55°C to 125°C or -55°C to 150°C. If the application requires operation below -55°C or above 150°C, substitute parts may not be suitable. Verify application temperature requirements before selection.

Q: Can 6A8-TP be used for new designs?

A: No. 6A8-TP is classified as "Not For New Designs," indicating the manufacturer has designated this part for end-of-life phase. New circuit designs should select from active-status alternatives: FR606GP-AP, 60S8-TP, or 6A08B-G.

Q: What is the significance of reverse recovery time differences?

A: FR606-T features fast recovery with 500 ns reverse recovery time. Substitute parts 60S8-TP, 6A08B-G, and 6A8-TP operate at standard recovery (>500 ns). In high-frequency switching applications, this difference may affect circuit performance. For applications sensitive to reverse recovery characteristics, FR606GP-AP maintains the 500 ns specification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts (1N5553, 60S8-TP, 6A08B-G, 6A8-TP, FR606GP-AP) are ROHS3 compliant, matching the compliance status of FR606-T.

Q: What packaging formats are available for substitute parts?

A: FR606GP-AP is available in bulk packaging. 60S8-TP is supplied in tape and reel (TR) format. 6A08B-G is supplied in bulk packaging. 6A8-TP is supplied in cut tape (CT) format. Packaging selection depends on production volume and assembly process requirements.

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