Equivalent & Substitute Parts for PR1503S-A

Part Overview

The PR1503S-A is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 200 V DC reverse voltage and 1.5 A average rectified current in a DO-41 through-hole package. This component is classified as obsolete, necessitating identification of active substitute parts that maintain electrical and mechanical compatibility for existing designs or inventory replacement scenarios.

Key Parameters

Parameter	PR1503S-A
Voltage - DC Reverse (Vr) (Max)	200 V
Current - Average Rectified (Io)	1.5 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1.5 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	150 ns
Current - Reverse Leakage @ Vr	5 µA @ 200 V
Capacitance @ Vr, F	20 pF @ 4V, 1MHz
Mounting Type	Through Hole
Package / Case	DO-204AL, DO-41, Axial
Operating Temperature - Junction	-65°C ~ 150°C
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the PR1503S-A are identified based on the following critical parameters that determine functional equivalence:

Voltage Rating Compatibility: All substitute parts maintain the 200 V DC reverse voltage maximum, ensuring operation within the same voltage class.

Package Compatibility: All substitute parts use DO-204AL (DO-41) axial through-hole packaging, enabling direct mechanical replacement in existing PCB layouts.

Current Rating Consideration: The PR1503S-A is rated for 1.5 A average rectified current. Substitute parts rated at 1 A average rectified current operate at reduced current capacity and are suitable for applications where the actual circuit current does not exceed 1 A.

Recovery Speed Classification: Substitute parts are classified as either Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns). Fast Recovery variants provide improved switching characteristics suitable for high-frequency applications.

Temperature Range: Operating temperature ranges vary between -55°C to -65°C minimum and 150°C maximum. Substitute parts with -55°C minimum temperature are suitable for applications not requiring extended low-temperature operation below -55°C.

Regulatory Compliance: All substitute parts maintain ROHS3 compliance and EAR99 ECCN classification, consistent with the original part.

Parameter Comparison

Parameter	PR1503S-A	1N4003G	HER103G B0G	UF4003-E3/54
Manufacturer	Diodes Incorporated	Taiwan Semiconductor Corporation	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	200 V	200 V	200 V	200 V
Current - Average Rectified (Io)	1.5 A	1 A	1 A	1 A
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 1.5 A	1 V @ 1 A	1 V @ 1 A	1 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns	Standard Recovery > 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns
Reverse Recovery Time (trr)	150 ns	Not specified	50 ns	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 200 V	5 µA @ 200 V	5 µA @ 200 V	10 µA @ 200 V
Capacitance @ Vr, F	20 pF @ 4V, 1MHz	10 pF @ 4V, 1MHz	15 pF @ 4V, 1MHz	17 pF @ 4V, 1MHz
Mounting Type	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
Operating Temperature - Junction	-65°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C	-55°C ~ 150°C
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

1N4003G (Taiwan Semiconductor Corporation)

The 1N4003G is an active product with standard recovery characteristics. This part is suitable for applications where switching speed is not a critical design parameter and circuit current does not exceed 1 A. The standard recovery classification (> 500ns) results in higher reverse recovery losses compared to the PR1503S-A. This part is appropriate for low-frequency rectification circuits and general-purpose applications. Product status is active with full ROHS3 compliance.

HER103G B0G (Taiwan Semiconductor Corporation)

The HER103G B0G is an active product with fast recovery characteristics (50 ns reverse recovery time), providing improved switching performance compared to the PR1503S-A (150 ns). This part is suitable for applications requiring faster switching response and is compatible with circuits where average rectified current does not exceed 1 A. The fast recovery classification makes this part suitable for higher-frequency applications. Product status is active with full ROHS3 compliance.

UF4003-E3/54 (Vishay General Semiconductor - Diodes Division)

The UF4003-E3/54 is an active product with fast recovery characteristics (50 ns reverse recovery time) and is supplied in cut tape packaging. This part provides the fastest switching response among the available substitutes and is suitable for applications requiring superior high-frequency performance. The reverse leakage current is specified at 10 µA, which is higher than the PR1503S-A specification of 5 µA. This part is appropriate for circuits where average rectified current does not exceed 1 A. Product status is active with full ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can the PR1503S-A be directly replaced with a 1 A rated substitute in all applications?

A: Direct replacement is possible only in applications where the actual circuit current does not exceed 1 A. The PR1503S-A is rated for 1.5 A average rectified current. If the circuit design requires the full 1.5 A capacity, a 1 A substitute will operate outside its rated specification. Circuit current analysis is required to determine compatibility.

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

A: Fast recovery diodes have shorter reverse recovery times (typically ≤ 500ns), resulting in reduced switching losses and improved performance in high-frequency applications. Standard recovery diodes have longer reverse recovery times (> 500ns) and are suitable for low-frequency rectification. The PR1503S-A is classified as fast recovery with 150 ns reverse recovery time. The 1N4003G is standard recovery, while HER103G B0G and UF4003-E3/54 are fast recovery with 50 ns reverse recovery time.

Q: Are all substitute parts mechanically compatible with the PR1503S-A?

A: Yes. All substitute parts use DO-204AL (DO-41) axial through-hole packaging, which is mechanically identical to the PR1503S-A. Direct PCB mounting replacement is possible without layout modifications.

Q: What is the significance of the operating temperature range difference between -55°C and -65°C?

A: The PR1503S-A operates from -65°C to 150°C, while all substitute parts operate from -55°C to 150°C. If the application requires operation below -55°C, the substitute parts are not suitable. For applications with minimum operating temperatures of -55°C or higher, the substitute parts are fully compatible.

Q: How does reverse leakage current affect circuit performance?

A: Reverse leakage current is the small current that flows through the diode when reverse biased. The PR1503S-A specifies 5 µA at 200 V, while the UF4003-E3/54 specifies 10 µA at 200 V. Higher reverse leakage current increases power dissipation and may affect circuit performance in sensitive applications. For most general-purpose rectification applications, this difference is negligible.

Q: What does ROHS3 compliance indicate?

A: ROHS3 compliance indicates that the part meets the Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials including lead, mercury, cadmium, and certain flame retardants. All substitute parts maintain ROHS3 compliance, consistent with the original PR1503S-A specification.

Q: Can the UF4003-E3/54 be used in place of the 1N4003G for improved performance?

A: Yes. The UF4003-E3/54 provides faster switching characteristics (50 ns reverse recovery time versus unspecified for 1N4003G) and is suitable for applications requiring improved high-frequency performance. Both parts are rated for 1 A average rectified current and 200 V reverse voltage. The UF4003-E3/54 is appropriate for circuits where switching speed is a design consideration.

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