RL204-T Equivalent & Substitute Parts

Part Overview

The RL204-T is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 400 V DC reverse voltage and 2 A average rectified current in a DO-15 through-hole package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The RL204-T employs standard recovery technology with a maximum forward voltage of 1 V at 2 A and reverse leakage current of 5 µA at 400 V.

Key Parameters

Parameter	RL204-T Value
Voltage - DC Reverse (Vr) (Max)	400 V
Current - Average Rectified (Io)	2 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 2 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	5 µA @ 400 V
Mounting Type	Through Hole
Package / Case	DO-204AC, DO-15, Axial
Operating Temperature - Junction	-65°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the RL204-T is determined by electrical and mechanical parameter equivalence. All substitute parts must meet or exceed the following critical parameters:

Electrical Requirements:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 2 A minimum
Current - Reverse Leakage @ Vr: 5 µA @ 400 V maximum
Mounting Type: Through Hole

Mechanical Requirements:

Package / Case: DO-204AC, DO-15, or Axial configurations

Compliance Requirements:

RoHS3 Compliant
REACH Unaffected

Substitute parts are grouped into two categories based on recovery speed characteristics:

Category 1: Standard Recovery (>500ns)

2A04G A0G (Taiwan Semiconductor Corporation)
GPP20G-E3/54 (Vishay General Semiconductor)
GPP20G-E3/73 (Vishay General Semiconductor)

Category 2: Fast Recovery (≤500ns)

EGP20G (Fairchild Semiconductor)
EGP20G-E3/54 (Vishay General Semiconductor)
EGP20G-E3/73 (Vishay General Semiconductor)
MUR240G (onsemi)
MUR240RLG (onsemi)

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Reverse Leakage @ Vr	Package	Temp Range	Product Status
RL204-T	Diodes Incorporated	400 V	2 A	1 V @ 2 A	Standard >500ns	5 µA @ 400 V	DO-15	-65°C ~ 150°C	Obsolete
2A04G A0G	Taiwan Semiconductor Corporation	400 V	2 A	1 V @ 2 A	Standard >500ns	5 µA @ 400 V	DO-204AC (DO-15)	-55°C ~ 150°C	Active
EGP20G	Fairchild Semiconductor	400 V	2 A	1.25 V @ 2 A	Fast ≤500ns	5 µA @ 400 V	DO-15	-65°C ~ 150°C	Active
EGP20G-E3/54	Vishay General Semiconductor	400 V	2 A	1.25 V @ 2 A	Fast ≤500ns	5 µA @ 400 V	DO-204AC (DO-15)	-65°C ~ 150°C	Active
EGP20G-E3/73	Vishay General Semiconductor	400 V	2 A	1.25 V @ 2 A	Fast ≤500ns	5 µA @ 400 V	DO-204AC (DO-15)	-65°C ~ 150°C	Active
GPP20G-E3/54	Vishay General Semiconductor	400 V	2 A	1.1 V @ 2 A	Standard >500ns	5 µA @ 400 V	DO-204AC (DO-15)	-55°C ~ 150°C	Active
GPP20G-E3/73	Vishay General Semiconductor	400 V	2 A	1.1 V @ 2 A	Standard >500ns	5 µA @ 400 V	DO-204AC (DO-15)	-55°C ~ 150°C	Active
MUR240G	onsemi	400 V	2 A	1.3 V @ 2 A	Fast ≤500ns	5 µA @ 400 V	DO-41 Axial	-65°C ~ 175°C	Obsolete
MUR240RLG	onsemi	400 V	2 A	1.3 V @ 2 A	Fast ≤500ns	5 µA @ 400 V	DO-41 Axial	-65°C ~ 175°C	Active

Engineering Selection Recommendations

For Direct Replacement (Active Product Status):

The 2A04G A0G from Taiwan Semiconductor Corporation provides the closest electrical match to the RL204-T with identical forward voltage characteristics (1 V @ 2 A) and standard recovery speed. This part is in active production status and maintains full RoHS3 compliance. The operating temperature range is -55°C to 150°C, which covers the lower end of the RL204-T range.

For Applications Requiring Fast Recovery:

The EGP20G-E3/54 and EGP20G-E3/73 from Vishay General Semiconductor are active production alternatives with fast recovery characteristics (≤500ns, 50 ns trr). These parts maintain the full -65°C to 150°C operating temperature range of the original RL204-T and are available in DO-204AC (DO-15) packaging. Forward voltage is 1.25 V @ 2 A, which is acceptable for most general-purpose rectification applications.

For Standard Recovery Applications:

The GPP20G-E3/54 and GPP20G-E3/73 from Vishay General Semiconductor offer standard recovery characteristics matching the RL204-T speed profile. These parts feature lower forward voltage (1.1 V @ 2 A) and are in active production. Operating temperature range is -55°C to 150°C.

For Axial Package Configurations:

The MUR240RLG from onsemi is an active production part with fast recovery characteristics, available in DO-41 axial configuration. This part extends the operating temperature range to -65°C to 175°C and is suitable for applications requiring axial lead geometry.

All recommended substitutes maintain RoHS3 compliance and REACH unaffected status, ensuring regulatory continuity.

Frequently Asked Questions (FAQ)

Q: Can the RL204-T be directly replaced with the 2A04G A0G?

A: Yes. The 2A04G A0G matches the RL204-T in voltage rating (400 V), current rating (2 A), forward voltage (1 V @ 2 A), recovery speed (standard >500ns), and reverse leakage (5 µA @ 400 V). Both are through-hole mounted in DO-15 compatible packages. The 2A04G A0G is in active production, addressing the obsolescence of the RL204-T.

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

A: Standard recovery diodes (RL204-T, 2A04G A0G, GPP20G series) have recovery times exceeding 500 ns. Fast recovery diodes (EGP20G series, MUR240 series) have recovery times of 50-65 ns. Fast recovery diodes are suitable for higher-frequency switching applications and reduce switching losses. Standard recovery diodes are appropriate for line-frequency rectification and lower-frequency applications.

Q: Are there package compatibility considerations between DO-15 and DO-204AC?

A: DO-15 and DO-204AC are equivalent package designations for the same physical form factor. Both refer to a 0.3-inch diameter axial lead package. Parts specified as DO-204AC (DO-15) or DO-15 are mechanically and electrically interchangeable in through-hole applications.

Q: Can the MUR240RLG be used as a substitute despite its axial package?

A: The MUR240RLG is electrically equivalent (400 V, 2 A, 5 µA reverse leakage) but uses a DO-41 axial package instead of the DO-15 package of the RL204-T. Substitution is possible only if the PCB layout accommodates axial lead spacing and orientation. The MUR240RLG offers extended temperature range (-65°C to 175°C) and is in active production.

Q: What compliance certifications apply to all substitute parts?

A: All substitute parts listed are RoHS3 compliant and REACH unaffected, matching the regulatory status of the RL204-T. This ensures compatibility with current environmental and hazardous substance regulations.

Q: How does forward voltage variation affect circuit performance?

A: Forward voltage ranges from 1 V (RL204-T, 2A04G A0G) to 1.3 V (MUR240 series) at 2 A. In rectification circuits, this variation affects voltage drop across the diode. For low-voltage applications, the 0.3 V difference between 1 V and 1.3 V may be significant. For high-voltage applications (400 V), the percentage impact is minimal. Circuit design must account for the specific forward voltage of the selected substitute.

Q: Is the RL204-T temperature range (-65°C to 150°C) critical for substitution?

A: The RL204-T operates from -65°C to 150°C. Substitutes with narrower ranges (such as 2A04G A0G and GPP20G series at -55°C to 150°C) are acceptable if the application does not require operation below -55°C. The MUR240RLG extends the upper limit to 175°C, providing additional thermal margin for high-temperature environments.

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