PR6004-T Equivalent & Substitute Parts

Part Overview

The PR6004-T is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 400 V DC reverse voltage and 6 A average rectified current. The device features fast recovery characteristics with a reverse recovery time of 150 ns and is housed in an R-6 axial through-hole package. The PR6004-T is classified as obsolete, necessitating identification of equivalent substitute components for ongoing applications and new designs. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while meeting modern compliance requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	6	A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 6 A	V
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Mounting Type	Through Hole	—
Package / Case	R-6, Axial	—
Operating Temperature - Junction	-65°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the PR6004-T is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 400 V
Current - Average Rectified (Io): Must equal or exceed 6 A
Voltage - Forward (Vf) (Max) @ If: Must not exceed 1.2 V @ 6 A for optimal performance
Reverse Recovery Time (trr): Fast recovery classification (≤ 500ns, > 200mA) preferred for equivalent performance
Current - Reverse Leakage @ Vr: Must not exceed 10 µA @ 400 V

Mechanical Compatibility Requirements:

Mounting Type: Through Hole (required)
Package / Case: R-6, Axial (required for direct mechanical substitution)

Thermal Compatibility Requirements:

Operating Temperature - Junction: Must support -65°C ~ 150°C range or equivalent

Compliance Requirements:

RoHS Status: ROHS3 Compliant preferred for new designs
REACH Status: REACH Unaffected preferred

Substitute parts are grouped into two categories: Direct Equivalents (matching all electrical and mechanical parameters with active product status) and Functional Alternatives (meeting electrical requirements with different recovery characteristics or product status considerations).

Parameter Comparison

Parameter	PR6004-T	1N5551	6A4-TP	FR604GP-TP	HER605GP-AP
Manufacturer	Diodes Incorporated	Microchip Technology	Micro Commercial Co	Micro Commercial Co	Micro Commercial Co
Voltage - DC Reverse (Vr) (Max)	400 V	400 V	400 V	400 V	400 V
Current - Average Rectified (Io)	6 A	3 A	6 A	6 A	6 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 6 A	1.2 V @ 9 A	950 mV @ 6 A	1.3 V @ 6 A	1.3 V @ 6 A
Speed Classification	Fast Recovery ≤ 500ns	Standard Recovery > 500ns	Standard Recovery > 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns
Reverse Recovery Time (trr)	150 ns	2 µs	—	150 ns	50 ns
Current - Reverse Leakage @ Vr	10 µA @ 400 V	1 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V	10 µA @ 400 V
Capacitance @ Vr, F	140pF @ 4V, 1MHz	—	150pF @ 4V, 1MHz	150pF @ 4V, 1MHz	100pF @ 4V, 1MHz
Package / Case	R-6, Axial	B, Axial	R-6, Axial	R-6, Axial	R-6, Axial
Operating Temperature - Junction	-65°C ~ 150°C	-65°C ~ 175°C	-55°C ~ 125°C	-55°C ~ 150°C	-55°C ~ 150°C
Product Status	Obsolete	Active	Not For New Designs	Active	Active
RoHS Status	ROHS3 Compliant	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Affected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Direct Equivalent Substitutes (Preferred for New Designs):

FR604GP-TP and HER605GP-AP are the primary substitutes for the PR6004-T. Both devices are manufactured by Micro Commercial Co, maintain the 400 V / 6 A electrical specification, feature fast recovery characteristics, and are housed in the R-6 axial package. Both parts carry Active product status and ROHS3 compliance. FR604GP-TP matches the PR6004-T reverse recovery time at 150 ns. HER605GP-AP offers superior performance with a 50 ns reverse recovery time and lower capacitance (100pF vs. 140pF), making it suitable for applications requiring faster switching characteristics. Both parts support the -55°C ~ 150°C operating temperature range, which covers the PR6004-T specification with the exception of the lower temperature limit (-55°C vs. -65°C).

Functional Alternative (Current-Limited Applications):

6A4-TP is a functional alternative rated for 400 V / 6 A with R-6 axial packaging and ROHS3 compliance. However, 6A4-TP carries a "Not For New Designs" product status and features standard recovery characteristics (> 500ns), making it unsuitable for applications requiring fast switching performance. This part is appropriate only for legacy system maintenance where recovery speed is not a critical parameter.

Not Recommended:

1N5551 is not a suitable substitute. Although rated for 400 V, the 3 A current rating is insufficient for the 6 A requirement of the PR6004-T. Additionally, 1N5551 features standard recovery characteristics and carries RoHS non-compliant status, making it unsuitable for modern applications.

Frequently Asked Questions (FAQ)

Q: Can the 1N5551 be used as a substitute for the PR6004-T?

A: No. The 1N5551 is rated for 3 A average rectified current, which is insufficient for applications requiring the 6 A capability of the PR6004-T. Additionally, 1N5551 carries RoHS non-compliant status and features standard recovery characteristics rather than fast recovery. This part does not meet the electrical or compliance requirements for substitution.

Q: What is the difference between FR604GP-TP and HER605GP-AP?

A: Both parts meet the 400 V / 6 A specification and feature fast recovery characteristics. The primary differences are: HER605GP-AP has a faster reverse recovery time (50 ns vs. 150 ns) and lower capacitance (100pF vs. 150pF). HER605GP-AP is preferred for applications where switching speed and reduced parasitic capacitance are critical. FR604GP-TP matches the PR6004-T reverse recovery time exactly and is suitable for applications with less stringent switching requirements.

Q: Why is 6A4-TP marked "Not For New Designs"?

A: 6A4-TP carries a "Not For New Designs" product status, indicating that the manufacturer recommends against using this part in new circuit designs. While the part meets the 400 V / 6 A electrical specification, it features standard recovery characteristics (> 500ns) rather than fast recovery. This part is appropriate only for replacement in existing systems where the original PR6004-T was used and recovery speed is not a limiting factor.

Q: Are all substitute parts compatible with the R-6 axial package footprint?

A: FR604GP-TP, 6A4-TP, and HER605GP-AP are all housed in R-6 axial packages and are mechanically compatible with the PR6004-T footprint. The 1N5551 uses a different B axial package and is not mechanically compatible without circuit board modification.

Q: What is the significance of the -65°C lower temperature limit in the PR6004-T specification?

A: The PR6004-T supports operation down to -65°C, while the recommended substitutes (FR604GP-TP and HER605GP-AP) support operation down to -55°C. For applications requiring operation below -55°C, the PR6004-T specification cannot be fully matched by the available substitutes. In such cases, alternative component sourcing or circuit redesign may be necessary.

Q: Does the forward voltage difference between PR6004-T (1.2 V @ 6 A) and FR604GP-TP (1.3 V @ 6 A) affect circuit performance?

A: The 0.1 V difference in forward voltage is within typical design margins for rectifier applications. However, this difference results in slightly higher power dissipation in FR604GP-TP. For applications with tight thermal budgets or high-frequency switching, this difference should be evaluated against specific circuit requirements.

Q: Why is REACH compliance status important for substitute selection?

A: REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) compliance status indicates regulatory compliance for chemical substance restrictions in the European Union. The PR6004-T carries "REACH Affected" status, while all recommended substitutes carry "REACH Unaffected" status. For applications subject to EU regulations or requiring REACH compliance documentation, the recommended substitutes provide superior regulatory positioning.

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