RGP10B Equivalent & Substitute Parts

Part Overview

The RGP10B is a general-purpose rectifier diode manufactured by onsemi, rated for 100 V DC reverse voltage and 1 A average rectified current in a DO-41 through-hole package. This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Identifying equivalent and substitute parts is necessary for applications requiring continued sourcing, legacy system maintenance, or design flexibility where alternative manufacturers' components meet the same electrical and mechanical specifications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3	V @ 1 A
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	150	ns
Current - Reverse Leakage @ Vr	5	µA @ 100 V
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 RGP10B are grouped based on strict electrical and mechanical compatibility criteria. All substitute diodes must meet or exceed the following key parameters:

Voltage Rating: 100 V DC reverse voltage (Vr) minimum
Current Rating: 1 A average rectified current (Io) minimum
Speed Classification: Fast Recovery (≤ 500ns, > 200mA)
Reverse Leakage: 5 µA @ 100 V maximum
Mounting Type: Through Hole
Package Compatibility: DO-41, DO-204AL, or Axial configurations

Parts are classified into two categories:

Direct Equivalents (identical electrical and mechanical specifications):

RGP10B-E3/54 (Vishay)
RGP10BE-E3/54 (Vishay)

Functional Substitutes (meet all key electrical parameters with minor variations in secondary characteristics):

1N4934-T (Diodes Incorporated)
1N4934G (Taiwan Semiconductor Corporation)
1N4934G-T (Diodes Incorporated)
1N4934RLG (onsemi)
EGP10B-E3/54 (Vishay)
FR102G B0G (Taiwan Semiconductor Corporation)

Limited Substitutes (meet voltage and current ratings but differ in secondary parameters):

RGP10A (Fairchild Semiconductor) — 50 V rating; suitable only for applications with lower voltage requirements
1N6077 (Microchip Technology) — 1.3 A rating; suitable for applications requiring higher current capacity

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Package	Temp Range [°C]	Product Status
RGP10B	onsemi	100	1	1.3 @ 1A	150	DO-41	-65 to 175	Not For New Designs
RGP10B-E3/54	Vishay	100	1	1.3 @ 1A	150	DO-204AL (DO-41)	-65 to 175	Active
RGP10BE-E3/54	Vishay	100	1	1.3 @ 1A	150	DO-204AL (DO-41)	-65 to 175	Active
1N4934-T	Diodes Incorporated	100	1	1.2 @ 1A	200	DO-41	-65 to 150	Active
1N4934G	Taiwan Semiconductor	100	1	1.2 @ 1A	200	DO-204AL (DO-41)	-55 to 150	Active
1N4934G-T	Diodes Incorporated	100	1	1.2 @ 1A	200	DO-41	-65 to 150	Active
1N4934RLG	onsemi	100	1	1.2 @ 1A	300	Axial	-65 to 150	Not For New Designs
EGP10B-E3/54	Vishay	100	1	0.95 @ 1A	50	DO-204AL (DO-41)	-65 to 150	Active
FR102G B0G	Taiwan Semiconductor	100	1	1.3 @ 1A	150	DO-204AL (DO-41)	-55 to 150	Active
RGP10A	Fairchild Semiconductor	50	1	1.3 @ 1A	150	DO-41	-65 to 175	Active
1N6077	Microchip Technology	100	1.3	1.76 @ 18.8A	30	Axial	-65 to 155	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for Direct Replacement)

RGP10B-E3/54 and RGP10BE-E3/54 (both Vishay) are the preferred direct equivalents. Both parts are Active status products, ROHS3 compliant, and maintain identical electrical specifications to the RGP10B. These parts are suitable for new designs and provide long-term availability assurance.

Secondary Substitutes (Functionally Compatible)

1N4934-T, 1N4934G, 1N4934G-T, and FR102G B0G meet all critical electrical parameters (100 V, 1 A, fast recovery) and are Active status products. These parts are suitable where the RGP10B is unavailable. Minor variations in forward voltage (1.2 V vs. 1.3 V) and reverse recovery time (200 ns vs. 150 ns) are within acceptable operating margins for general-purpose rectification applications.

EGP10B-E3/54 (Vishay) offers superior performance characteristics with lower forward voltage (0.95 V @ 1 A) and faster reverse recovery time (50 ns). This part is suitable for applications where reduced power dissipation or faster switching is beneficial.

1N4934RLG (onsemi) is functionally compatible but carries "Not For New Designs" status, limiting its use to legacy system maintenance.

Limited Substitutes (Conditional Use)

RGP10A (Fairchild) is suitable only for applications with voltage requirements of 50 V or lower. This part cannot be used as a direct substitute where 100 V rating is required.

1N6077 (Microchip) has a higher current rating (1.3 A) and is suitable for applications requiring increased current capacity. However, the axial package configuration may require mechanical redesign in some applications.

Compliance Considerations

All recommended substitutes are ROHS3 compliant and REACH unaffected, matching the RGP10B's regulatory status. Moisture sensitivity levels vary; parts with MSL 1 (Unlimited) provide superior shelf-life stability compared to the RGP10B (Not Applicable).

Frequently Asked Questions (FAQ)

Q: Can I use RGP10A as a substitute for RGP10B?

A: RGP10A is not a suitable direct substitute. The RGP10A has a maximum reverse voltage rating of 50 V, while the RGP10B is rated for 100 V. Use RGP10A only in applications where the circuit voltage does not exceed 50 V.

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

A: DO-41 and DO-204AL are equivalent package designations for the same physical form factor. Both refer to an axial-lead through-hole diode package. Parts specified as DO-204AL (DO-41) or DO-41 are mechanically and electrically interchangeable.

Q: Why does EGP10B-E3/54 have a lower forward voltage than RGP10B?

A: EGP10B-E3/54 is a SUPERECTIFIER® product line component with optimized semiconductor material and junction design, resulting in lower forward voltage drop (0.95 V vs. 1.3 V). This is a performance advantage that reduces power dissipation in the diode.

Q: Is 1N4934-T suitable for high-temperature applications?

A: 1N4934-T has a maximum junction temperature rating of 150°C, compared to RGP10B's 175°C. For applications requiring operation above 150°C, RGP10B, RGP10B-E3/54, or RGP10BE-E3/54 are required.

Q: Can I substitute 1N6077 for RGP10B in any application?

A: 1N6077 is electrically compatible (100 V, 1.3 A) but uses an axial package configuration. Mechanical compatibility depends on the PCB layout and component mounting design. Verify that the axial lead spacing and mounting holes accommodate the 1N6077 before substitution.

Q: What does "Not For New Designs" status mean?

A: "Not For New Designs" indicates the manufacturer has discontinued active development and recommends using alternative products for new applications. However, these parts remain available for legacy system support and maintenance. For new designs, select parts with "Active" status such as RGP10B-E3/54, 1N4934-T, or EGP10B-E3/54.

Q: Are all substitute parts ROHS3 compliant?

A: All recommended substitutes listed in this document are ROHS3 compliant, matching the RGP10B's regulatory compliance. The exception is 1N6077, which is RoHS non-compliant; verify regulatory requirements before using this part.

Q: What is reverse recovery time and why does it vary among substitutes?

A: Reverse recovery time (trr) is the interval required for a diode to stop conducting after the applied voltage reverses polarity. Shorter recovery times (50 ns for EGP10B-E3/54) reduce switching losses and are beneficial in high-frequency applications. Longer recovery times (300 ns for 1N4934RLG) have minimal impact in low-frequency rectification circuits.

Q: Can I use 1N4934G from Taiwan Semiconductor instead of 1N4934-T from Diodes Incorporated?

A: Yes. Both parts meet the same electrical specifications (100 V, 1 A, fast recovery). The primary difference is the operating temperature range: 1N4934G operates from -55°C to 150°C, while 1N4934-T operates from -65°C to 150°C. Select based on your application's minimum temperature requirement.

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