UG56G A0G Equivalent & Substitute Parts

Part Overview

The UG56G A0G is a general-purpose rectifier diode manufactured by Taiwan Semiconductor Corporation, rated for 400 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. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design optimization within the specified parameter constraints.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	5	A
Voltage - Forward (Vf) (Max) @ If	1.55 V @ 5 A	V
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	-
Reverse Recovery Time (trr)	20	ns
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Mounting Type	Through Hole	-
Package / Case	DO-201AD, Axial	-
Operating Temperature - Junction	-55 to 175	°C
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitute parts for the UG56G A0G are identified based on the following electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Package / Case: DO-201AD, Axial (mechanical compatibility)
Mounting Type: Through Hole
RoHS Status: ROHS3 Compliant
Product Status: Active

Secondary Consideration Parameters:

Current - Average Rectified (Io): Rated at or above 5 A for direct substitution; lower ratings (3 A, 4 A) are listed as alternatives where current requirements permit
Speed: Fast Recovery technology preferred for performance alignment
Reverse Recovery Time (trr): Lower values indicate superior switching characteristics
Operating Temperature Range: Extended range (-65°C to 175°C) provides broader operational envelope

The substitute parts listed maintain the 400 V voltage rating and DO-201AD package specification. Current ratings vary from 3 A to 4 A, representing design trade-offs between thermal performance and current capacity. All listed substitutes are Active status and RoHS3 compliant.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed	trr [ns]	Ir @ Vr [µA]	Tj Range [°C]	Package
UG56G A0G	Taiwan Semiconductor Corporation	400	5	1.55 @ 5 A	Fast Recovery ≤ 500ns	20	10 @ 400 V	-55 to 175	DO-201AD
1N5404-E3/54	Vishay General Semiconductor - Diodes Division	400	3	1.2 @ 3 A	Standard Recovery >500ns	-	5 @ 400 V	-50 to 150	DO-201AD
1N5404-E3/73	Vishay General Semiconductor - Diodes Division	400	3	1.2 @ 3 A	Standard Recovery >500ns	-	5 @ 400 V	-50 to 150	DO-201AD
GP30G-E3/54	Vishay General Semiconductor - Diodes Division	400	3	1.1 @ 3 A	Standard Recovery >500ns	5000	5 @ 400 V	-65 to 175	DO-201AD
MUR440-E3/54	Vishay General Semiconductor - Diodes Division	400	4	1.28 @ 4 A	Fast Recovery ≤ 500ns	75	10 @ 400 V	-65 to 175	DO-201AD
RGP30G-E3/54	Vishay General Semiconductor - Diodes Division	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	5 @ 400 V	-65 to 175	DO-201AD
RGP30G-E3/73	Vishay General Semiconductor - Diodes Division	400	3	1.3 @ 3 A	Fast Recovery ≤ 500ns	150	5 @ 400 V	-65 to 175	DO-201AD

Engineering Selection Recommendations

Direct Current Capacity Substitution: The MUR440-E3/54 provides the closest current rating match at 4 A, maintaining Fast Recovery speed characteristics and 20 ns reverse recovery time performance class. This part is suitable for applications where 5 A capacity is not critical and 4 A operation is acceptable. Operating temperature range extends to -65°C to 175°C, matching the UG56G A0G upper limit.

Voltage and Package Compatibility: All listed substitute parts maintain the 400 V DC reverse voltage rating and DO-201AD axial through-hole package specification, ensuring mechanical and electrical compatibility within the voltage class.

Compliance and Product Status: All substitute parts carry Active product status and RoHS3 compliance certification, meeting regulatory requirements equivalent to the main part. REACH Unaffected status is consistent across all parts.

Lower Current Rating Alternatives: The 1N5404-E3/54, 1N5404-E3/73, GP30G-E3/54, RGP30G-E3/54, and RGP30G-E3/73 are rated at 3 A average rectified current. These parts are suitable for applications where the circuit design permits operation at reduced current capacity. The RGP30G variants offer Fast Recovery characteristics and extended temperature range (-65°C to 175°C), while the 1N5404 variants operate within -50°C to 150°C range.

Frequently Asked Questions (FAQ)

Q: Can the 1N5404-E3/54 or 1N5404-E3/73 directly replace the UG56G A0G?

A: These parts share the 400 V voltage rating and DO-201AD package. However, the current rating is reduced from 5 A to 3 A. Substitution is valid only if the circuit design operates at or below 3 A average rectified current. The operating temperature range is also narrower (-50°C to 150°C versus -55°C to 175°C).

Q: What is the difference between the MUR440-E3/54 and the UG56G A0G?

A: Both parts are rated 400 V and use the DO-201AD package. The MUR440-E3/54 is rated at 4 A versus 5 A for the UG56G A0G. Both employ Fast Recovery technology with reverse recovery times of 75 ns and 20 ns respectively. The MUR440-E3/54 supports an extended operating temperature range of -65°C to 175°C.

Q: Are the RGP30G-E3/54 and RGP30G-E3/73 interchangeable?

A: Yes. Both parts are identical in electrical specifications (400 V, 3 A, Fast Recovery, 150 ns trr, -65°C to 175°C). The difference is in packaging format: E3/54 is Cut Tape (CT) and E3/73 is Tape & Reel (TR). Selection depends on procurement and assembly requirements.

Q: What does "Fast Recovery" versus "Standard Recovery" mean for substitution?

A: Fast Recovery indicates reverse recovery time ≤ 500 ns, while Standard Recovery is > 500 ns. The UG56G A0G specifies Fast Recovery with 20 ns trr. The MUR440-E3/54 and RGP30G variants maintain Fast Recovery characteristics. The 1N5404 and GP30G variants use Standard Recovery technology, which may affect switching performance in high-frequency applications.

Q: Can I use a 3 A rated diode in a circuit designed for 5 A?

A: No. Using a lower current-rated component in a circuit designed for higher current operation will result in excessive junction temperature, reduced component life, and potential failure. Current rating must meet or exceed circuit requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 Compliant certification and REACH Unaffected status, matching the compliance profile of the UG56G A0G.

Q: What is the significance of the DO-201AD package specification?

A: DO-201AD is an axial through-hole package with standardized lead spacing and dimensions. All listed parts use this identical package, ensuring mechanical compatibility with existing PCB layouts and assembly processes without modification.

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