PR1505S-A Equivalent & Substitute Parts

Part Overview

The PR1505S-A is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 600 V DC reverse voltage and 1.5 A average rectified current in a DO-41 through-hole axial package. This component is classified as obsolete, indicating that direct replacement with active production alternatives is necessary for new designs and ongoing procurement requirements. The fast recovery characteristic (≤500 ns) and 250 ns reverse recovery time position this diode for applications requiring moderate switching speeds in power supply and rectification circuits.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	600	V
Current - Average Rectified (Io)	1.5	A
Voltage - Forward (Vf) Maximum @ If	1.2 V @ 1.5 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	—
Reverse Recovery Time (trr)	250	ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V	µA
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 of the PR1505S-A is determined by strict equivalence across the following critical parameters:

Voltage Rating: All substitute parts maintain 600 V DC reverse voltage maximum, ensuring compatibility with the original circuit voltage specifications.

Package Type: All substitutes use DO-204AL (DO-41) axial through-hole packaging, maintaining mechanical and electrical interface compatibility.

Mounting Configuration: Through-hole axial mounting is preserved across all alternatives.

Reverse Recovery Speed: Substitutes are grouped by recovery speed classification. Fast recovery diodes (≤500 ns) are preferred for direct replacement to maintain switching performance. Standard recovery diodes (>500 ns) represent a functional alternative where switching speed is not critical.

Current Rating: Substitute parts are available in three current categories: 800 mA, 1 A, and 2 A. The 1 A and 2 A ratings are suitable for applications where the original 1.5 A rating is required, with the 2 A option providing additional margin. The 800 mA option is suitable only for applications with reduced current demands.

Compliance Status: All substitutes maintain ROHS3 compliance and are classified as active products with current manufacturing availability.

Parameter Comparison

Parameter	PR1505S-A	BA158-E3/53	GP08J-E3/73	MUR260RLG	RGP10JE-E3/53	RGP10JE-E3/73	SBYV26C-E3/73
Voltage - DC Reverse (Vr) Max	600 V	600 V	600 V	600 V	600 V	600 V	600 V
Current - Average Rectified (Io)	1.5 A	1 A	800 mA	2 A	1 A	1 A	1 A
Voltage - Forward (Vf) Max @ If	1.2 V @ 1.5 A	1.3 V @ 1 A	1.3 V @ 800 mA	1.35 V @ 2 A	1.3 V @ 1 A	1.3 V @ 1 A	2.5 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Standard Recovery >500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns
Reverse Recovery Time (trr)	250 ns	250 ns	2 µs	75 ns	150 ns	250 ns	30 ns
Current - Reverse Leakage @ Vr	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V	5 µA @ 600 V
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-65 to 150°C	-65 to 175°C	-65 to 175°C	-65 to 175°C	-65 to 175°C	-65 to 175°C	-65 to 175°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

Primary Substitutes (Preferred for Direct Replacement):

The MUR260RLG, RGP10JE-E3/73, and RGP10JE-E3/53 are the preferred substitutes for the PR1505S-A. These parts maintain fast recovery characteristics (75 ns to 250 ns) and are rated for 1 A to 2 A current, providing adequate performance for applications originally designed for the 1.5 A PR1505S-A. All three are active production parts with ROHS3 compliance and extended operating temperature ranges (-65 to 175°C). The MUR260RLG offers the highest current rating (2 A) and fastest recovery time (75 ns), making it suitable for applications requiring maximum switching performance. The RGP10JE variants provide 1 A ratings with recovery times of 150 ns and 250 ns respectively, offering a balance between performance and cost.

Secondary Substitutes (Conditional Use):

The BA158-E3/53 and SBYV26C-E3/73 are suitable substitutes where current requirements do not exceed 1 A. The BA158-E3/53 maintains the 250 ns recovery time of the original part and is recommended for applications with moderate switching speeds. The SBYV26C-E3/73 features the fastest recovery time (30 ns) among all substitutes, making it optimal for high-frequency switching applications, though its elevated forward voltage (2.5 V @ 1 A) must be evaluated for thermal impact in the target circuit.

Limited Substitution (Reduced Performance):

The GP08J-E3/73 is a standard recovery diode (2 µs recovery time) rated for 800 mA. This part is suitable only for low-frequency rectification applications where switching speed is not a design constraint and current demands do not exceed 800 mA. The significantly longer recovery time and reduced current rating make this option unsuitable for the majority of applications originally using the PR1505S-A.

Compliance and Availability:

All substitute parts are ROHS3 compliant and classified as active products with current manufacturing availability. The MUR260RLG offers the highest inventory level (80,300 pieces), ensuring long-term supply security. The SBYV26C-E3/73 provides the second-highest inventory (8,600 pieces), followed by the RGP10JE variants and BA158-E3/53 with inventories ranging from 623 to 1,021 pieces.

Frequently Asked Questions (FAQ)

Q: Can the MUR260RLG directly replace the PR1505S-A in all applications?

A: The MUR260RLG is electrically compatible with the PR1505S-A across all critical parameters: 600 V voltage rating, DO-41 axial package, and fast recovery speed. The 2 A current rating exceeds the original 1.5 A specification, providing additional margin. The 75 ns recovery time is faster than the original 250 ns, which improves switching performance. However, the circuit design must accommodate the slightly higher forward voltage (1.35 V @ 2 A versus 1.2 V @ 1.5 A) to ensure thermal stability.

Q: What is the difference between fast recovery and standard recovery diodes in this comparison?

A: Fast recovery diodes (≤500 ns) are designed for switching applications where rapid reverse recovery is critical to minimize switching losses and electromagnetic interference. Standard recovery diodes (>500 ns) are optimized for linear rectification applications where switching speed is not a performance constraint. The GP08J-E3/73 is the only standard recovery option in this list, with a 2 µs recovery time. For applications originally using the PR1505S-A, fast recovery substitutes are strongly preferred unless the circuit design explicitly permits longer recovery times.

Q: Why does the SBYV26C-E3/73 have a significantly higher forward voltage than other substitutes?

A: The SBYV26C-E3/73 is a Schottky barrier diode variant, which accounts for its 2.5 V forward voltage at 1 A compared to 1.2 to 1.35 V for standard junction diodes. While the Schottky design provides the fastest recovery time (30 ns), the elevated forward voltage generates additional heat dissipation. This part is suitable only for applications where the increased forward voltage drop does not compromise circuit performance or thermal management.

Q: Can I use a 1 A rated diode in place of the 1.5 A PR1505S-A?

A: A 1 A rated substitute is suitable only if the actual circuit current demand does not exceed 1 A. If the original design requires 1.5 A operation, a 1 A diode will operate at or near its maximum rating, reducing reliability margin and increasing junction temperature. For applications requiring the full 1.5 A capacity, the MUR260RLG (2 A rating) is the recommended choice. The BA158-E3/53, RGP10JE-E3/53, RGP10JE-E3/73, and SBYV26C-E3/73 are suitable only for reduced-current applications.

Q: Are all substitute parts available in the same packaging as the PR1505S-A?

A: Yes. All substitute parts listed are available in DO-204AL (DO-41) axial through-hole packaging, which is mechanically and electrically identical to the original PR1505S-A package. This ensures direct board-level compatibility without PCB redesign or mechanical modifications.

Q: What is the impact of the extended operating temperature range on substitute selection?

A: The PR1505S-A operates from -65°C to 150°C, while all substitute parts operate from -65°C to 175°C. The extended upper temperature limit of the substitutes provides additional thermal margin and is beneficial for applications operating in high-temperature environments. This difference does not restrict substitution; rather, it represents an improvement in thermal performance.

Q: Which substitute offers the best balance of performance, cost, and availability?

A: The RGP10JE-E3/73 provides an optimal balance for most applications. It maintains the 250 ns recovery time of the original PR1505S-A, is rated for 1 A (suitable for applications with current demands below 1.5 A), is ROHS3 compliant, and is an active product with 894 pieces in stock. For applications requiring the full 1.5 A capacity, the MUR260RLG is the superior choice due to its 2 A rating, superior 75 ns recovery time, and highest inventory availability (80,300 pieces).

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