RGP10A-M3/73 Equivalent & Substitute Parts

Part Overview

The RGP10A-M3/73 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 50 V DC reverse voltage and 1 A average rectified current in a through-hole DO-204AL (DO-41) axial package. This part is classified as obsolete and belongs to the SUPERECTIFIER® series with fast recovery characteristics.

Substitution becomes necessary when the RGP10A-M3/73 reaches end-of-life status or when inventory becomes unavailable. Active equivalent parts with identical or superior electrical specifications and compatible packaging are available from multiple manufacturers. Substitute selection must maintain compatibility with the original circuit design while considering package form factor, thermal performance, and compliance certifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	V
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Mounting Type	Through Hole	—
Package / Case	DO-204AL, DO-41, Axial	—
Operating Temperature - Junction	-65 to 175	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the RGP10A-M3/73 are grouped into two primary categories based on package compatibility and electrical performance:

Category 1: Through-Hole Axial Package Equivalents (DO-204AL / DO-41)

These substitutes maintain the original through-hole axial form factor and are direct pin-compatible replacements. Selection within this category is based on matching or exceeding the following critical parameters:

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 1 A minimum
Voltage - Forward (Vf) (Max) @ If: 1.3 V or lower at 1 A
Reverse Recovery Time (trr): 500 ns or faster
Current - Reverse Leakage @ Vr: 5 µA or lower at 50 V
Operating Temperature - Junction: -65°C to 150°C minimum
Mounting Type: Through Hole
Package / Case: DO-204AL, DO-41, or Axial

Category 2: Surface-Mount Package Alternatives (SMA)

These substitutes provide higher current ratings (2 A) in a surface-mount form factor. Selection requires circuit board redesign for surface-mount assembly and is applicable only when higher current capacity is acceptable and PCB layout permits surface-mount placement.

Voltage - DC Reverse (Vr) (Max): 50 V minimum
Current - Average Rectified (Io): 2 A (exceeds original 1 A requirement)
Mounting Type: Surface Mount
Package / Case: DO-214AC, SMA

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	Package	Mounting Type	Tj (°C)	Product Status
RGP10A-M3/73	Vishay	50	1	1.3 @ 1 A	150	5 @ 50 V	DO-204AL	Through Hole	-65 to 175	Obsolete
RGP10A-E3/73	Vishay	50	1	1.3 @ 1 A	150	5 @ 50 V	DO-204AL	Through Hole	-65 to 175	Active
1N4933-T	Diodes Incorporated	50	1	1.2 @ 1 A	200	5 @ 50 V	DO-41	Through Hole	-65 to 150	Active
1N4933G-T	Diodes Incorporated	50	1	1.2 @ 1 A	200	5 @ 50 V	DO-41	Through Hole	-65 to 150	Active
1N4933RLG	onsemi	50	1	1.2 @ 1 A	300	5 @ 50 V	DO-41	Through Hole	-65 to 150	Not For New Designs
1N6076	Microchip Technology	50	1.3	1.76 @ 18.8 A	30	5 @ 50 V	A, Axial	Through Hole	-65 to 155	Active
PR1001G-T	Diodes Incorporated	50	1	1.3 @ 1 A	150	5 @ 50 V	DO-41	Through Hole	-65 to 150	Active
RGP10A	Fairchild Semiconductor	50	1	1.3 @ 1 A	150	5 @ 50 V	DO-41	Through Hole	-65 to 175	Active
UF1AHR1G	Taiwan Semiconductor Corporation	50	1	1.0 @ 1 A	50	5 @ 50 V	DO-204AL	Through Hole	-55 to 150	Active
MURA205T3G	onsemi	50	2	0.94 @ 2 A	30	2 @ 50 V	SMA	Surface Mount	-65 to 175	Active
SURA8205T3G	onsemi	50	2	0.94 @ 2 A	30	2 @ 50 V	SMA	Surface Mount	-65 to 175	Obsolete

Engineering Selection Recommendations

Primary Recommendation: RGP10A-E3/73 (Vishay General Semiconductor - Diodes Division)

The RGP10A-E3/73 is the parametric equivalent to the RGP10A-M3/73 with identical electrical specifications and package form factor. This part is currently in active production status, ensuring long-term availability and supply chain stability. Both parts are ROHS3 compliant and carry REACH Unaffected status. The RGP10A-E3/73 maintains the same operating temperature range (-65°C to 175°C) and all critical electrical parameters, including forward voltage, reverse recovery time, and reverse leakage current. This substitution requires no circuit modifications.

Secondary Recommendation: PR1001G-T (Diodes Incorporated)

The PR1001G-T provides identical electrical performance to the original part with matching forward voltage (1.3 V @ 1 A) and reverse recovery time (150 ns). This part is active in production and ROHS3 compliant. The operating temperature range is -65°C to 150°C, which is 25°C lower than the original part. This substitution is suitable for applications where the maximum junction temperature does not exceed 150°C. The part is supplied in tape and reel packaging.

Tertiary Recommendation: RGP10A (Fairchild Semiconductor)

The RGP10A is an active production part with identical electrical specifications and the same operating temperature range as the original (-65°C to 175°C). This part matches all critical parameters including forward voltage (1.3 V @ 1 A) and reverse recovery time (150 ns). Fairchild Semiconductor maintains active production status for this device. This substitution requires no circuit modifications and is suitable for applications requiring the full temperature range.

Alternative for Improved Performance: UF1AHR1G (Taiwan Semiconductor Corporation)

The UF1AHR1G offers superior electrical performance with lower forward voltage (1.0 V @ 1 A versus 1.3 V) and significantly faster reverse recovery time (50 ns versus 150 ns). This part is AEC-Q101 qualified for automotive applications and carries active production status. The operating temperature range is -55°C to 150°C. This substitution is applicable when improved switching performance and reduced power dissipation are beneficial, provided the minimum temperature requirement of -55°C is acceptable.

Surface-Mount Alternative: MURA205T3G (onsemi)

The MURA205T3G provides a surface-mount solution with doubled current capacity (2 A versus 1 A) in the SMA package. This part is active in production and ROHS3 compliant with operating temperature range -65°C to 175°C. This substitution requires PCB redesign for surface-mount assembly and is applicable only when higher current capacity is required and the circuit board layout permits surface-mount placement.

Not Recommended: 1N4933RLG (onsemi)

The 1N4933RLG carries a product status of "Not For New Designs" and is therefore not suitable for new circuit implementations or long-term production applications.

Frequently Asked Questions (FAQ)

Q: Can the RGP10A-E3/73 be used as a direct replacement for the RGP10A-M3/73?

A: Yes. The RGP10A-E3/73 is a parametric equivalent with identical voltage rating (50 V), current rating (1 A), forward voltage (1.3 V @ 1 A), reverse recovery time (150 ns), and package form factor (DO-204AL). Both parts are through-hole axial devices with identical pin compatibility. No circuit modifications are required.

Q: What is the difference between the DO-204AL and DO-41 package designations?

A: DO-204AL and DO-41 refer to the same physical package form factor—a through-hole axial lead diode. These designations are equivalent and interchangeable. Both describe a cylindrical component with leads extending from opposite ends.

Q: Why does the UF1AHR1G have a lower operating temperature minimum (-55°C versus -65°C)?

A: The UF1AHR1G is qualified to AEC-Q101 automotive standards, which specify a minimum operating temperature of -55°C. This is a qualification-driven specification rather than a performance limitation. If your application requires operation below -55°C, this part is not suitable. For applications operating at -55°C or above, this part is acceptable.

Q: Can I use the MURA205T3G or SURA8205T3G as a direct replacement?

A: No. These parts are surface-mount devices in the SMA package, whereas the original RGP10A-M3/73 is a through-hole axial component. Direct replacement requires PCB redesign and assembly process changes. These parts are suitable only when circuit board layout is being redesigned to accommodate surface-mount components and higher current capacity (2 A) is acceptable.

Q: What is the significance of the "Fast Recovery" classification?

A: Fast Recovery indicates that the diode has a reverse recovery time of 500 ns or less at currents greater than 200 mA. This characteristic is important in switching applications where rapid diode turn-off prevents excessive reverse current. The RGP10A-M3/73 has a reverse recovery time of 150 ns, which is well within the fast recovery specification. Substitute parts must maintain this performance characteristic for equivalent switching behavior.

Q: Are all recommended substitutes ROHS3 compliant?

A: All recommended through-hole substitutes (RGP10A-E3/73, 1N4933-T, 1N4933G-T, PR1001G-T, RGP10A, UF1AHR1G, and MURA205T3G) are ROHS3 compliant. The 1N6076 from Microchip Technology is RoHS non-compliant and is not recommended for applications requiring RoHS compliance. The SURA8205T3G is ROHS3 compliant but is obsolete.

Q: What is the difference between cut tape (CT) and tape & reel (TR) packaging?

A: Cut tape (CT) packaging supplies components in short strips cut from the reel, typically for smaller quantity orders or manual assembly. Tape & reel (TR) packaging supplies the full reel for automated assembly equipment. Both contain identical components; the difference is in the supply format and handling method. Selection depends on assembly process requirements and order quantity.

Q: Can I substitute a 1 A rated diode with a 1.3 A rated diode like the 1N6076?

A: Yes, provided all other electrical parameters are compatible. A higher current rating provides additional safety margin and does not negatively affect circuit operation. The 1N6076 is rated for 1.3 A average rectified current, which exceeds the original 1 A requirement. However, verify that the forward voltage specification (1.76 V @ 18.8 A for the 1N6076) is acceptable for your application, as this differs from the original specification.

Q: What does "REACH Unaffected" status mean?

A: REACH Unaffected indicates that the component is not subject to REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) regulatory requirements. This status applies to most semiconductor diodes. All recommended substitutes carry REACH Unaffected status, indicating compliance with European chemical regulations.

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