PR1501S-T Equivalent & Substitute Parts

Part Overview

The PR1501S-T is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 50V DC reverse voltage and 1.5A average rectified current in a DO-41 through-hole axial package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for ongoing design requirements and production continuity. Substitute parts must maintain electrical compatibility across voltage, current, and thermal specifications while accommodating available packaging options.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1.5 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-65 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution eligibility for the PR1501S-T is determined by the following critical parameters:

Mandatory Electrical Compatibility:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50V
Current - Average Rectified (Io): Must equal or exceed 1.5A
Reverse Recovery Time (trr): Must support fast recovery classification (≤ 500ns, > 200mA)
Current - Reverse Leakage @ Vr: Must not exceed 5µA @ 50V

Mechanical Compatibility:

Mounting Type: Through Hole required
Package / Case: DO-41 axial or equivalent axial configurations acceptable

Environmental & Compliance:

Operating Temperature - Junction: Minimum -65°C to 150°C range
RoHS Status: ROHS3 Compliant preferred for regulatory alignment

Three substitute parts meet these criteria with varying trade-offs in current rating, recovery characteristics, and compliance status.

Parameter Comparison

Parameter	PR1501S-T (Main)	1N6076	GP15A-E3/54	RGP10A
Manufacturer	Diodes Incorporated	Microchip Technology	Vishay General Semiconductor	Fairchild Semiconductor
Product Status	Obsolete	Active	Active	Active
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 V
Current - Average Rectified (Io)	1.5 A	1.3 A	1.5 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1.5 A	1.76 V @ 18.8 A	1.1 V @ 1.5 A	1.3 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Standard Recovery > 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA
Reverse Recovery Time (trr)	150 ns	30 ns	3.5 µs	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V	5 µA @ 50 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	A, Axial	DO-204AC, DO-15, Axial	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-65 to 150 °C	-65 to 155 °C	-65 to 175 °C	-65 to 175 °C
RoHS Status	ROHS3 Compliant	RoHS Non-Compliant	ROHS3 Compliant	Vendor Undefined

Engineering Selection Recommendations

GP15A-E3/54 (Preferred Substitute)

The GP15A-E3/54 from Vishay General Semiconductor provides the closest functional match to the PR1501S-T. It maintains identical voltage (50V) and current (1.5A) ratings, matching the original specification exactly. The part is active in production, ROHS3 compliant, and rated for extended junction temperature operation (-65°C to 175°C). The forward voltage is superior at 1.1V versus 1.2V. The primary trade-off is recovery speed classification: GP15A-E3/54 operates as a standard recovery diode (3.5µs trr) rather than fast recovery. This substitution is suitable for applications where switching frequency does not require sub-microsecond recovery characteristics. Packaging is DO-204AC (DO-15) axial, compatible with through-hole PCB layouts.

RGP10A (Current-Limited Substitute)

The RGP10A from Fairchild Semiconductor maintains fast recovery characteristics (150ns trr) and DO-41 package compatibility identical to the original part. However, the average rectified current rating is reduced to 1A, representing a 33% derating from the PR1501S-T specification. This substitute is applicable only to designs where the actual operating current does not exceed 1A. The part is active in production with extended temperature range (-65°C to 175°C). RoHS compliance status is vendor-undefined.

1N6076 (Marginal Substitute)

The 1N6076 from Microchip Technology meets voltage and leakage specifications but falls short on current rating (1.3A versus 1.5A required). Fast recovery characteristics are maintained (30ns trr, superior to original). The part is active in production but is RoHS non-compliant, creating regulatory risk for new designs. Forward voltage specification is provided at a different test condition (1.76V @ 18.8A), limiting direct comparison. This substitute is not recommended for new applications requiring ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the GP15A-E3/54 replace the PR1501S-T in all applications?

A: The GP15A-E3/54 provides electrical substitution for voltage, current, and leakage specifications. The primary difference is recovery speed: GP15A-E3/54 is a standard recovery diode (3.5µs) versus the original fast recovery (150ns). Applications operating at low switching frequencies (< 100kHz) experience no functional impact. High-frequency switching circuits (> 500kHz) may require evaluation of switching losses and thermal performance.

Q: Why does the RGP10A have a lower current rating?

A: The RGP10A is rated for 1A average rectified current, which is a different product specification from the PR1501S-T (1.5A). This represents a distinct device family within the DO-41 package category. The RGP10A is suitable only for applications where actual operating current does not exceed 1A.

Q: What is the impact of the 1N6076 being RoHS non-compliant?

A: RoHS non-compliance indicates the part contains lead or other restricted substances. For applications subject to RoHS regulations (EU, California, and other jurisdictions), the 1N6076 cannot be used in new designs or production. ROHS3 compliant alternatives (GP15A-E3/54) must be selected instead.

Q: Are the DO-41 and DO-15 packages mechanically interchangeable?

A: DO-41 (DO-204AL) and DO-15 (DO-204AC) are both axial through-hole packages with similar lead spacing and PCB hole compatibility. Physical dimensions differ slightly, but both fit standard 0.3-inch lead spacing on through-hole PCBs. Verify PCB layout clearances before substitution.

Q: What is the significance of forward voltage differences between substitutes?

A: Forward voltage (Vf) affects power dissipation and voltage drop across the diode during conduction. The PR1501S-T specifies 1.2V @ 1.5A, while GP15A-E3/54 specifies 1.1V @ 1.5A (lower loss). The 1N6076 specifies 1.76V @ 18.8A, which is a different test condition and not directly comparable. Lower forward voltage reduces heat generation in high-current applications.

Q: Can I use the 1N6076 if my application operates below 1.3A?

A: The 1N6076 meets the 1.3A current rating specification. However, RoHS non-compliance remains a regulatory barrier for most new designs. If RoHS compliance is not required, the 1N6076 is electrically suitable for applications operating at or below 1.3A with fast recovery requirements (30ns trr).

Q: What is the operating temperature range impact?

A: The PR1501S-T is rated -65°C to 150°C. Both GP15A-E3/54 and RGP10A extend this to -65°C to 175°C, providing additional thermal margin. The 1N6076 extends to -65°C to 155°C. Extended temperature range does not affect substitution eligibility but provides design flexibility for high-temperature environments.

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