Equivalent & Substitute Parts for 6A2-T General Purpose Rectifier Diode

Part Overview

The 6A2-T is a general purpose rectifier diode manufactured by Diodes Incorporated, rated for 200 V DC reverse voltage and 6 A average rectified current 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. The 6A2-T operates across a junction temperature range of -65°C to 175°C and maintains ROHS3 compliance with REACH affected status.

Substitute parts are required for new procurement due to the obsolete product status. Equivalent parts must maintain electrical compatibility within the specified voltage and current parameters while accommodating variations in package styles, recovery characteristics, and thermal ratings.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	200	V
Current - Average Rectified (Io)	6	A
Voltage - Forward (Vf) Maximum @ If	900 mV @ 6 A	mV @ A
Speed Classification	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	10	µA @ 200 V
Mounting Type	Through Hole	—
Package / Case	R-6, Axial	—
Operating Temperature - Junction	-65 to 175	°C
Technology	Standard	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution logic for the 6A2-T is based on the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) Maximum: 200 V (exact match required)
Current - Average Rectified (Io): 6 A (exact match required for full-current applications; 5 A variants acceptable for reduced-current designs)
Mounting Type: Through Hole (mandatory for mechanical compatibility)
Technology: Standard (recovery speed classification)

Secondary Compatibility Factors:

Package / Case: R-6 axial preferred; P600 axial and DO-201AD axial acceptable with mechanical verification
Operating Temperature Range: Minimum -55°C to 125°C acceptable; extended ranges (-65°C to 175°C or higher) provide additional margin
Forward Voltage (Vf): Variations within 100 mV acceptable for standard applications
Reverse Leakage Current: Variations within 10 µA acceptable

Regulatory Compliance:

RoHS3 Compliance: Required
REACH Status: Unaffected preferred; affected status acceptable with supply chain verification

Substitute parts are grouped into three categories: full electrical equivalents (200 V, 6 A, standard recovery), reduced-current variants (200 V, 5 A, standard or fast recovery), and alternative package configurations maintaining electrical specifications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) mV @ If	Speed	Package / Case	Tj (°C)	Product Status
6A2-T	Diodes Incorporated	200	6	900 @ 6 A	Standard >500ns	R-6, Axial	-65 to 175	Obsolete
1N5550	Solid State Inc.	200	3	1000 @ 3 A	Standard >500ns	Axial	-65 to 200	Active
6A02-G	Comchip Technology	200	6	1000 @ 6 A	Standard >500ns	R-6, Axial	-55 to 125	Active
6A02B-G	Comchip Technology	200	6	1000 @ 6 A	Standard >500ns	R-6, Axial	-55 to 125	Active
6A2-TP	Micro Commercial Co	200	6	950 @ 6 A	Standard >500ns	R-6, Axial	-55 to 125	Not For New Designs
FR603GP-AP	Micro Commercial Co	200	6	1300 @ 6 A	Fast ≤500ns	R-6, Axial	-55 to 150	Active
GI752-E3/54	Vishay General Semiconductor - Diodes Division	200	6	900 @ 6 A	Standard >500ns	P600, Axial	-50 to 150	Active
GI752-E3/73	Vishay General Semiconductor - Diodes Division	200	6	900 @ 6 A	Standard >500ns	P600, Axial	-50 to 150	Active
HER503GP-TP	Micro Commercial Co	200	5	1000 @ 5 A	Fast ≤500ns	DO-201AD, Axial	-65 to 150	Not For New Designs
HER603GP-AP	Micro Commercial Co	200	6	1100 @ 6 A	Fast ≤500ns	R-6, Axial	-55 to 150	Active
SF54G-AP	Micro Commercial Co	200	5	950 @ 5 A	Fast ≤500ns	DO-201AD, Axial	-65 to 150	Active

Engineering Selection Recommendations

Tier 1 - Full Electrical Equivalents (Preferred for Direct Replacement)

The following parts maintain 200 V reverse voltage, 6 A average rectified current, and active product status:

6A02-G (Comchip Technology): Active status, R-6 package match, standard recovery characteristics, ROHS3 compliant, REACH unaffected. Operating temperature range -55°C to 125°C is narrower than original but acceptable for most applications.
6A02B-G (Comchip Technology): Identical electrical and compliance specifications to 6A02-G with bulk packaging option. Active status and REACH unaffected status support long-term supply continuity.
GI752-E3/54 and GI752-E3/73 (Vishay General Semiconductor - Diodes Division): Active status, 200 V / 6 A specifications, standard recovery, P600 axial package. Forward voltage matches original 900 mV specification. ROHS3 compliant, REACH unaffected. Operating temperature -50°C to 150°C provides adequate margin for most applications.
HER603GP-AP (Micro Commercial Co): Active status, 200 V / 6 A specifications, R-6 package match, fast recovery technology, ROHS3 compliant, REACH unaffected. Forward voltage 1.1 V is within acceptable tolerance. Operating temperature -55°C to 150°C.

Tier 2 - Reduced-Current Variants (5 A Rated)

These parts maintain 200 V reverse voltage with 5 A average rectified current. Selection is appropriate for applications where 6 A rating is not required:

SF54G-AP (Micro Commercial Co): Active status, 200 V / 5 A, fast recovery, DO-201AD package, forward voltage 950 mV, operating temperature -65°C to 150°C, ROHS3 compliant, REACH unaffected.

Tier 3 - Reduced-Current Variants (3 A Rated)

1N5550 (Solid State Inc.): Active status, 200 V / 3 A, standard recovery, axial package, operating temperature -65°C to 200°C, ROHS3 compliant. Selection appropriate only for applications with 3 A or lower current requirements.

Not Recommended for New Designs

6A2-TP (Micro Commercial Co): Marked "Not For New Designs" despite active inventory. Avoid for new applications.
HER503GP-TP (Micro Commercial Co): Marked "Not For New Designs." Avoid for new applications.

Frequently Asked Questions (FAQ)

Q: Can 1N5550 (3 A rated) replace 6A2-T (6 A rated)?

A: 1N5550 is electrically compatible at 200 V reverse voltage but rated for only 3 A average rectified current. Substitution is valid only if the application current requirement does not exceed 3 A. For applications requiring 6 A operation, 1N5550 is not suitable.

Q: What is the difference between R-6 and P600 package styles?

A: Both are axial through-hole packages for rectifier diodes. R-6 and P600 are different mechanical envelopes. GI752-E3/54 and GI752-E3/73 use P600 packaging. Mechanical verification of PCB footprint compatibility is required before substitution. Lead spacing and body diameter differ between packages.

Q: Are fast recovery diodes (FR603GP-AP, HER603GP-AP) compatible with standard recovery applications?

A: Fast recovery diodes (recovery time ≤500 ns) are electrically compatible with standard recovery applications (recovery time >500 ns). Fast recovery diodes exhibit lower reverse recovery charge and faster switching, which may improve efficiency in switching applications. Forward voltage specifications must be verified for thermal design purposes.

Q: What is the significance of "Not For New Designs" status?

A: Parts marked "Not For New Designs" are in active production but manufacturers recommend against use in new circuit designs. These parts may have limited long-term availability or are being phased out. For new designs, select parts with "Active" status.

Q: Can DO-201AD package (SF54G-AP, HER503GP-TP) be used in place of R-6 package (6A2-T)?

A: DO-201AD and R-6 are different axial through-hole packages styles with different mechanical dimensions. Direct substitution requires PCB footprint compatibility verification. Lead spacing, body diameter, and mounting hole alignment must be confirmed before substitution.

Q: What is REACH Affected versus REACH Unaffected status?

A: REACH Affected indicates the part may contain substances of concern under EU REACH regulations, requiring additional documentation and supply chain verification. REACH Unaffected status indicates no such substances are present. For applications subject to REACH compliance requirements, select parts with REACH Unaffected status when available.

Q: Is the operating temperature range difference between 6A2-T (-65°C to 175°C) and 6A02-G (-55°C to 125°C) significant?

A: The 6A02-G has a narrower operating range. For applications operating below -55°C or above 125°C, 6A02-G is not suitable. For applications within -55°C to 125°C, the narrower range is acceptable. Verify application temperature requirements before selection.

Q: What does "Standard Recovery >500ns, > 200mA (Io)" mean?

A: This specifies reverse recovery time greater than 500 nanoseconds at reverse recovery current greater than 200 mA. Standard recovery diodes have slower switching characteristics compared to fast recovery diodes. This parameter affects switching losses in high-frequency applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant, matching the compliance status of the original 6A2-T component.

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