PR1503S-T Equivalent & Substitute Parts

Part Overview

The PR1503S-T 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 equivalent and substitute parts for ongoing production and maintenance applications. Substitute parts must maintain electrical compatibility within the specified voltage and current parameters while accommodating available package configurations.

Key Parameters

Parameter	Value
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
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

Substitution of the PR1503S-T is determined by the following critical electrical and mechanical parameters:

Voltage Rating: All substitute parts must maintain a minimum DC reverse voltage rating of 200 V to ensure circuit protection and reliability.

Current Rating: Substitute parts are grouped into two categories: (1) parts rated for 1.5 A average rectified current, providing direct electrical equivalence, and (2) parts rated for 1.0 A, which operate at reduced current capacity and are suitable only where circuit design permits lower current operation.

Recovery Speed: The PR1503S-T specifies fast recovery characteristics (≤ 500ns). Substitute parts are available in both fast recovery and standard recovery (> 500ns) classifications. Fast recovery parts maintain the original switching performance; standard recovery parts exhibit slower switching behavior.

Package Configuration: The PR1503S-T uses DO-41 (DO-204AL) axial package. Substitute parts are available in DO-41 (DO-204AL) and DO-15 (DO-204AC) configurations. Both are through-hole axial packages with identical mounting compatibility on standard PCB layouts.

Temperature Range: The PR1503S-T operates from -65°C to 150°C. Substitute parts with extended temperature ranges (-65°C to 175°C) provide additional thermal margin.

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

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max)	Io (A)	Vf (Max) @ If	Speed	trr (ns)	Ir @ Vr	Package	Temp Range	Product Status
PR1503S-T	Diodes Incorporated	200 V	1.5 A	1.2 V @ 1.5 A	Fast Recovery ≤ 500ns	150	5 µA @ 200 V	DO-41	-65°C ~ 150°C	Obsolete
STTH1R02	STMicroelectronics	200 V	1.5 A	1.0 V @ 1.5 A	Fast Recovery ≤ 500ns	30	3 µA @ 200 V	DO-41	-55°C ~ 175°C	Active
1N5393-E3/73	Vishay General Semiconductor - Diodes Division	200 V	1.5 A	1.4 V @ 1.5 A	Standard Recovery > 500ns	2000	5 µA @ 200 V	DO-41	-50°C ~ 150°C	Active
1N5393GP-E3/54	Vishay General Semiconductor - Diodes Division	200 V	1.5 A	1.4 V @ 1.5 A	Standard Recovery > 500ns	2000	5 µA @ 200 V	DO-15	-65°C ~ 175°C	Active
RGP15D-E3/54	Vishay General Semiconductor - Diodes Division	200 V	1.5 A	1.3 V @ 1.5 A	Fast Recovery ≤ 500ns	150	5 µA @ 200 V	DO-15	-65°C ~ 175°C	Active
RGP15D-E3/73	Vishay General Semiconductor - Diodes Division	200 V	1.5 A	1.3 V @ 1.5 A	Fast Recovery ≤ 500ns	150	5 µA @ 200 V	DO-15	-65°C ~ 175°C	Active
GP15D-E3/54	Vishay General Semiconductor - Diodes Division	200 V	1.5 A	1.1 V @ 1.5 A	Standard Recovery > 500ns	3500	5 µA @ 200 V	DO-15	-65°C ~ 175°C	Active
1N4003G	Taiwan Semiconductor Corporation	200 V	1.0 A	1.0 V @ 1.0 A	Standard Recovery > 500ns	N/A	5 µA @ 200 V	DO-41	-55°C ~ 150°C	Active
1N4003RLG	onsemi	200 V	1.0 A	1.1 V @ 1.0 A	Standard Recovery > 500ns	N/A	10 µA @ 200 V	Axial	-65°C ~ 175°C	Not For New Designs
HER103G B0G	Taiwan Semiconductor Corporation	200 V	1.0 A	1.0 V @ 1.0 A	Fast Recovery ≤ 500ns	50	5 µA @ 200 V	DO-41	-55°C ~ 150°C	Active
RGP10D	Fairchild Semiconductor	200 V	1.0 A	1.3 V @ 1.0 A	Fast Recovery ≤ 500ns	150	5 µA @ 200 V	DO-41	-65°C ~ 175°C	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (1.5 A Rating):

STTH1R02 from STMicroelectronics provides the closest electrical match to the PR1503S-T. Both parts maintain 200 V reverse voltage, 1.5 A current rating, and fast recovery characteristics. STTH1R02 is active and ROHS3 compliant. The part exhibits superior reverse recovery time (30 ns versus 150 ns) and lower reverse leakage current (3 µA versus 5 µA), resulting in improved switching performance and reduced power dissipation. Operating temperature extends to 175°C, providing additional thermal margin. Package configuration is DO-41, maintaining identical PCB mounting compatibility.

RGP15D-E3/54 and RGP15D-E3/73 from Vishay General Semiconductor maintain 200 V reverse voltage, 1.5 A current rating, and fast recovery characteristics matching the original part. Both are active and ROHS3 compliant. These parts use DO-15 (DO-204AC) package configuration, which is physically larger than DO-41 but remains compatible with standard through-hole PCB layouts. Operating temperature extends to 175°C. Reverse recovery time matches the original specification at 150 ns.

1N5393-E3/73 and 1N5393GP-E3/54 from Vishay General Semiconductor maintain 200 V reverse voltage and 1.5 A current rating. Both are active and ROHS3 compliant. These parts employ standard recovery characteristics (> 500ns), resulting in slower switching behavior compared to the original fast recovery specification. 1N5393-E3/73 uses DO-41 package; 1N5393GP-E3/54 uses DO-15 package. Operating temperature for 1N5393GP-E3/54 extends to 175°C.

GP15D-E3/54 from Vishay General Semiconductor maintains 200 V reverse voltage and 1.5 A current rating. The part is active and ROHS3 compliant. It employs standard recovery characteristics and DO-15 package configuration. Operating temperature extends to 175°C. Forward voltage is 1.1 V at 1.5 A, lower than the original specification.

Reduced Current Alternatives (1.0 A Rating):

1N4003G from Taiwan Semiconductor Corporation maintains 200 V reverse voltage with reduced 1.0 A current rating. The part is active and ROHS3 compliant. It employs standard recovery characteristics and DO-41 package configuration. This part is suitable for applications where circuit design permits 1.0 A operation.

HER103G B0G from Taiwan Semiconductor Corporation maintains 200 V reverse voltage with reduced 1.0 A current rating. The part is active and ROHS3 compliant. It employs fast recovery characteristics (50 ns reverse recovery time) and DO-41 package configuration. This part is suitable for applications where circuit design permits 1.0 A operation and fast switching performance is required.

RGP10D from Fairchild Semiconductor maintains 200 V reverse voltage with reduced 1.0 A current rating. The part is active and ROHS3 compliant. It employs fast recovery characteristics (150 ns reverse recovery time) and DO-41 package configuration. Operating temperature extends to 175°C. This part is suitable for applications where circuit design permits 1.0 A operation.

1N4003RLG from onsemi maintains 200 V reverse voltage with reduced 1.0 A current rating. The part is classified as "Not For New Designs" and is therefore not recommended for new circuit development. It employs standard recovery characteristics and axial package configuration. Operating temperature extends to 175°C.

Frequently Asked Questions (FAQ)

Q: Can STTH1R02 directly replace PR1503S-T in all applications?

A: STTH1R02 maintains identical voltage and current ratings with superior switching performance. Both parts are rated for 200 V reverse voltage and 1.5 A average rectified current. STTH1R02 uses DO-41 package, providing identical PCB mounting compatibility. The part is active and ROHS3 compliant. Direct substitution is supported where circuit design does not depend on the specific forward voltage or reverse recovery time characteristics of the original part.

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

A: Recovery speed refers to the time required for a diode to transition from conducting to blocking state. Fast recovery diodes (≤ 500ns) switch more rapidly, reducing switching losses and enabling higher frequency operation. Standard recovery diodes (> 500ns) exhibit slower switching behavior and are suitable for lower frequency applications. The PR1503S-T specifies fast recovery at 150 ns. Substitute parts are available in both classifications; selection depends on circuit switching frequency requirements.

Q: Can 1.0 A rated diodes replace the 1.5 A PR1503S-T?

A: 1.0 A rated parts (1N4003G, HER103G B0G, RGP10D) maintain the same 200 V reverse voltage rating but operate at reduced current capacity. These parts are suitable only where circuit design permits 1.0 A operation. If the circuit requires 1.5 A capability, 1.0 A rated parts will not provide adequate current handling and may result in component failure or circuit malfunction.

Q: What is the significance of package configuration differences (DO-41 versus DO-15)?

A: DO-41 (DO-204AL) and DO-15 (DO-204AC) are both through-hole axial packages with identical electrical function. DO-15 is physically larger than DO-41. Both packages mount on standard PCB layouts with identical lead spacing. Package selection depends on available PCB footprint space. Electrical performance is independent of package configuration.

Q: Why is 1N4003RLG marked "Not For New Designs"?

A: Parts marked "Not For New Designs" are in mature or declining production status. While existing inventory may be available, manufacturers do not recommend these parts for new circuit development. For new designs, select from parts with "Active" product status to ensure long-term availability and manufacturing support.

Q: How do forward voltage differences affect circuit operation?

A: Forward voltage (Vf) represents the voltage drop across the diode when conducting. The PR1503S-T specifies 1.2 V at 1.5 A. Substitute parts range from 1.0 V to 1.4 V at rated current. In rectifier applications, forward voltage differences directly affect output voltage and power dissipation. Higher forward voltage results in greater voltage drop and increased heat generation. Circuit design must accommodate the forward voltage specification of the selected substitute part.

Q: Are all substitute parts ROHS3 compliant?

A: All substitute parts listed maintain ROHS3 compliance, consistent with the original PR1503S-T specification. ROHS3 compliance indicates the part does not contain restricted substances (lead, cadmium, mercury, hexavalent chromium, polybrominated biphenyls, or polybrominated diphenyl ethers) above specified thresholds.

Q: What is the operating temperature significance?

A: The PR1503S-T operates from -65°C to 150°C. Substitute parts with extended temperature ranges (-65°C to 175°C) provide additional thermal margin for high-temperature applications. Selection depends on the maximum ambient and junction temperatures in the target circuit. Parts with lower maximum temperature ratings (150°C) are suitable for standard temperature range applications.

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