FR102G A0G Equivalent & Substitute Parts

Part Overview

The FR102G A0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 100 V DC reverse voltage and 1 A average rectified current in a DO-204AL (DO-41) through-hole package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified based on matching electrical specifications, mechanical compatibility, and package equivalence to ensure functional interchangeability in circuit applications.

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
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	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the FR102G A0G are selected based on the following criteria:

Electrical Parameters (Critical for Substitution):

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Current - Average Rectified (Io): 1 A minimum
Current - Reverse Leakage @ Vr: 5 µA @ 100 V maximum
Mounting Type: Through Hole

Mechanical Parameters (Required for Physical Compatibility):

Package / Case: DO-204AL, DO-41, or Axial equivalent
Supplier Device Package: DO-204AL (DO-41) or DO-41

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Product Status: Active or Last Time Buy

Substitute parts are grouped into two categories: Direct equivalents (matching all electrical and mechanical specifications) and similar alternatives (meeting core electrical requirements with minor parameter variations within acceptable engineering tolerances).

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [V]	trr [ns]	Ir @ Vr [µA]	Package	Temp Range [°C]	Product Status
FR102G A0G	Taiwan Semiconductor Corporation	100	1	1.3	150	5	DO-204AL (DO-41)	-55 to 150	Active
RGP10B	Fairchild Semiconductor	100	1	1.3	150	5	DO-204AL (DO-41)	-65 to 175	Active
1N4002-E3/54	Vishay General Semiconductor - Diodes Division	100	1	1.1	—	5	DO-204AL (DO-41)	-55 to 150	Active
1N4002-E3/73	Vishay General Semiconductor - Diodes Division	100	1	1.1	—	5	DO-204AL (DO-41)	-55 to 150	Active
1N4002-G	Comchip Technology	100	1	1.1	—	5	DO-41	-55 to 150	Active
1N4002-T	Diodes Incorporated	100	1	1.0	—	5	DO-41	-65 to 150	Last Time Buy
1N4002E-E3/73	Vishay General Semiconductor - Diodes Division	100	1	1.1	—	5	DO-204AL (DO-41)	-55 to 150	Active
1N4002G	Taiwan Semiconductor Corporation	100	1	1.0	—	5	DO-204AL (DO-41)	-55 to 150	Active
1N4002GP-E3/54	Vishay General Semiconductor - Diodes Division	100	1	1.1	2000	5	DO-204AL (DO-41)	-65 to 175	Active
1N4002GPE-E3/54	Vishay General Semiconductor - Diodes Division	100	1	1.1	2000	5	DO-204AL (DO-41)	-65 to 175	Active
1N4002GPE-E3/73	Vishay General Semiconductor - Diodes Division	100	1	1.1	2000	5	DO-204AL (DO-41)	-65 to 175	Active

Engineering Selection Recommendations

Direct Equivalent (Preferred for Drop-In Replacement):

RGP10B from Fairchild Semiconductor is the primary direct equivalent. It matches the FR102G A0G in all critical electrical parameters (100 V, 1 A, 1.3 V forward voltage, 150 ns recovery time) and mechanical specifications (DO-204AL package). RGP10B extends the operating temperature range to -65°C to 175°C and maintains Active product status with RoHS3 compliance.

Alternative Substitutes (Functionally Compatible):

The 1N4002 series variants from Vishay General Semiconductor (1N4002-E3/54, 1N4002-E3/73, 1N4002E-E3/73, 1N4002GP-E3/54, 1N4002GPE-E3/54, 1N4002GPE-E3/73) meet all core electrical requirements with 100 V reverse voltage and 1 A current rating. These parts exhibit lower forward voltage (1.1 V) compared to the FR102G A0G (1.3 V), which is acceptable for general-purpose rectification applications. All variants are RoHS3 compliant and Active status.

The 1N4002-G from Comchip Technology and 1N4002-T from Diodes Incorporated are functionally compatible alternatives. The 1N4002-T carries Last Time Buy status, indicating limited future availability.

The 1N4002G from Taiwan Semiconductor Corporation (same manufacturer as the main part) provides an alternative with matching temperature range and RoHS3 compliance.

Selection Criteria by Application:

For applications requiring extended temperature operation: RGP10B, 1N4002GP-E3/54, 1N4002GPE-E3/54, or 1N4002GPE-E3/73
For standard temperature range applications: 1N4002-E3/54, 1N4002-E3/73, 1N4002E-E3/73, or 1N4002-G
For long-term supply continuity: Avoid 1N4002-T (Last Time Buy status)

Frequently Asked Questions (FAQ)

Q: Can RGP10B directly replace FR102G A0G without circuit modification?

A: Yes. RGP10B is a direct electrical and mechanical equivalent with identical voltage and current ratings, forward voltage characteristics, and DO-204AL package. The extended temperature range (-65°C to 175°C versus -55°C to 150°C) provides additional operational margin.

Q: What is the difference between 1N4002 variants with different suffixes (E3/54, E3/73, GP, GPE)?

A: The suffixes indicate packaging and tape reel configurations. E3/54 and E3/73 refer to different tape reel specifications from Vishay. GP and GPE designations indicate SUPERECTIFIER® series variants with improved reverse recovery time (2 µs versus standard >500 ns). All variants maintain the same core electrical specifications for 100 V, 1 A operation.

Q: Is the lower forward voltage (1.1 V) of 1N4002 series variants a concern compared to FR102G A0G (1.3 V)?

A: No. Lower forward voltage is beneficial in rectification applications, reducing power dissipation and heat generation. The 1N4002 variants operate within standard rectifier specifications and are fully compatible for general-purpose rectification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are RoHS3 compliant, matching the compliance status of the FR102G A0G.

Q: Which substitute part has the best long-term availability?

A: RGP10B from Fairchild Semiconductor and the 1N4002 series from Vishay General Semiconductor maintain Active product status with substantial inventory levels. Avoid 1N4002-T, which carries Last Time Buy status indicating discontinued production.

Q: Can I use 1N4002-T as a substitute despite Last Time Buy status?

A: 1N4002-T is electrically and mechanically compatible with FR102G A0G. However, Last Time Buy status indicates limited future availability. Selection should consider project timeline and long-term supply requirements.

Q: What is the significance of the DO-204AL and DO-41 package designations?

A: DO-204AL and DO-41 are equivalent designations for the same axial through-hole package. All listed substitute parts use this package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.

Q: Are there performance differences between standard recovery and fast recovery variants?

A: The FR102G A0G specifies fast recovery (≤500 ns, trr 150 ns). Most 1N4002 variants specify standard recovery (>500 ns). For general-purpose rectification in power supplies and AC-to-DC conversion, both recovery speeds are functionally acceptable. Fast recovery variants reduce switching losses in high-frequency applications.

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