UG54G A0G Equivalent & Substitute Parts

Part Overview

The UG54G A0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 200 V DC reverse voltage and 5 A average rectified current in a DO-201AD axial through-hole package. This component is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified based on matching or compatible electrical and mechanical parameters within the general-purpose rectifier diode category. Substitutes are necessary when the primary part is unavailable, when alternative sourcing is required, or when design flexibility permits selection from qualified alternatives meeting the same functional requirements.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	200	V
Current - Average Rectified (Io)	5	A
Voltage - Forward (Vf) (Max) @ If	1.05 V @ 5 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	20	ns
Current - Reverse Leakage @ Vr	10	µA @ 200 V
Mounting Type	Through Hole	—
Package / Case	DO-201AD, Axial	—
Operating Temperature - Junction	-55°C ~ 175°C	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the UG54G A0G are qualified based on the following criteria:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 200 V
Package / Case: DO-201AD, Axial
Mounting Type: Through Hole
RoHS Status: ROHS3 Compliant

Compatible Parameter Ranges:

Current - Average Rectified (Io): 3 A to 5 A (substitutes rated at 3 A or 4 A are acceptable for applications not requiring the full 5 A capacity)
Voltage - Forward (Vf) (Max): Substitutes with forward voltage up to 1.3 V @ rated current are compatible
Speed: Both Fast Recovery (≤ 500ns) and Standard Recovery (> 500ns) technologies are acceptable
Reverse Recovery Time (trr): Substitutes with trr values from 20 ns to 150 ns are compatible
Operating Temperature - Junction: Substitutes with ranges encompassing or exceeding -55°C to 175°C are acceptable

Substitute parts are grouped by current rating: 3 A substitutes (1N5402 series, UF5402-E3/54, RGP30D-E3/73) and 4 A substitutes (MUR420 series). All substitutes maintain the same reverse voltage specification and package form factor.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) [V]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Tj Range [°C]
UG54G A0G	Taiwan Semiconductor Corporation	200	5	1.05 @ 5 A	Fast Recovery ≤ 500ns	20	10 @ 200 V	DO-201AD	-55 ~ 175
1N5402-E3/54	Vishay General Semiconductor - Diodes Division	200	3	1.2 @ 3 A	Standard Recovery > 500ns	—	5 @ 200 V	DO-201AD	-50 ~ 150
1N5402-E3/73	Vishay General Semiconductor - Diodes Division	200	3	1.2 @ 3 A	Standard Recovery > 500ns	—	5 @ 200 V	DO-201AD	-50 ~ 150
MUR420-E3/54	Vishay General Semiconductor - Diodes Division	200	4	0.89 @ 4 A	Fast Recovery ≤ 500ns	35	5 @ 200 V	DO-201AD	-65 ~ 175
MUR420-E3/73	Vishay General Semiconductor - Diodes Division	200	4	0.89 @ 4 A	Fast Recovery ≤ 500ns	35	5 @ 200 V	DO-201AD	-65 ~ 175
MUR420-M3/54	Vishay General Semiconductor - Diodes Division	200	4	0.89 @ 4 A	Fast Recovery ≤ 500ns	35	5 @ 200 V	DO-201AD	-65 ~ 175
RGP30D-E3/73	Vishay General Semiconductor - Diodes Division	200	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	5 @ 200 V	DO-201AD	-65 ~ 175
UF5402-E3/54	Vishay General Semiconductor - Diodes Division	200	3	1.0 @ 3 A	Fast Recovery ≤ 500ns	50	10 @ 200 V	DO-201AD	-55 ~ 150

Engineering Selection Recommendations

All listed substitute parts maintain Active product status and RoHS3 compliance, meeting regulatory and environmental requirements equivalent to the primary UG54G A0G component. Selection among substitutes is determined by application-specific current requirements and thermal operating conditions.

For applications requiring 4 A or less: MUR420 series variants (MUR420-E3/54, MUR420-E3/73, MUR420-M3/54) provide fast recovery characteristics with lower forward voltage (0.89 V @ 4 A) and extended operating temperature range (-65°C to 175°C), making them suitable for high-frequency switching applications and wide thermal environments.

For applications requiring 3 A or less: 1N5402 series (1N5402-E3/54, 1N5402-E3/73) offer standard recovery characteristics with reduced reverse leakage (5 µA @ 200 V). UF5402-E3/54 provides fast recovery with forward voltage of 1.0 V @ 3 A and reverse recovery time of 50 ns. RGP30D-E3/73 (SUPERECTIFIER® series) delivers fast recovery with extended temperature range (-65°C to 175°C) and reduced reverse leakage.

For applications requiring 5 A: The UG54G A0G primary part is the only listed component rated for the full 5 A specification. No substitute provides equivalent 5 A current capacity.

All substitutes are available in DO-201AD axial through-hole package format, ensuring mechanical and electrical compatibility with existing PCB designs and assembly processes.

Frequently Asked Questions (FAQ)

Q: Can I use a 3 A rated diode as a substitute for the 5 A UG54G A0G?

A: No. The UG54G A0G is rated for 5 A average rectified current. Substitutes rated at 3 A (1N5402 series, UF5402-E3/54, RGP30D-E3/73) are not suitable for applications requiring the full 5 A capacity. Current rating substitution is only permissible when the application circuit operates at or below the substitute part's rated current.

Q: What is the difference between Fast Recovery and Standard Recovery diodes?

A: Fast Recovery diodes have reverse recovery time (trr) of 500 ns or less and are designed for high-frequency switching applications. Standard Recovery diodes have trr greater than 500 ns and are suitable for lower-frequency rectification. The UG54G A0G is Fast Recovery (trr = 20 ns). MUR420 series and UF5402-E3/54 are also Fast Recovery. 1N5402 series are Standard Recovery.

Q: Are all substitute parts available in the same package as the UG54G A0G?

A: Yes. All listed substitute parts use the DO-201AD axial through-hole package, ensuring identical mechanical compatibility and PCB mounting characteristics.

Q: What is the significance of forward voltage (Vf) differences among substitutes?

A: Forward voltage affects power dissipation and thermal performance. The UG54G A0G has Vf of 1.05 V @ 5 A. MUR420 series substitutes have lower Vf (0.89 V @ 4 A), resulting in reduced power loss. UF5402-E3/54 has Vf of 1.0 V @ 3 A. Higher Vf values (1N5402 at 1.2 V @ 3 A, RGP30D-E3/73 at 1.3 V @ 3 A) result in increased power dissipation.

Q: Can I use a substitute with a lower operating temperature range?

A: Substitutes with operating temperature ranges that do not encompass the full -55°C to 175°C specification of the UG54G A0G may be used only in applications where the actual operating environment remains within the substitute part's specified range. 1N5402 series and UF5402-E3/54 have maximum junction temperatures of 150°C, limiting use in applications requiring operation above 150°C.

Q: What does RoHS3 compliance mean?

A: RoHS3 (Restriction of Hazardous Substances Directive 3) compliance indicates that the component meets European Union environmental regulations restricting the use of specific hazardous materials including lead, cadmium, mercury, and certain brominated flame retardants. All listed parts are RoHS3 compliant.

Q: Are there differences in reverse leakage current among the substitutes?

A: Yes. The UG54G A0G and UF5402-E3/54 have reverse leakage of 10 µA @ 200 V. All other substitutes (1N5402 series, MUR420 series, RGP30D-E3/73) have reverse leakage of 5 µA @ 200 V, indicating lower leakage current and potentially better performance in high-impedance circuits.

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