UG4A-M3/54 Equivalent & Substitute Parts

Part Overview

The UG4A-M3/54 is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division. This through-hole component operates at 50 V DC reverse voltage with a 4 A average rectified current rating and features fast recovery characteristics. The part is classified as Active product status and is RoHS3 compliant. Substitute parts are identified when equivalent electrical and mechanical specifications are required due to inventory constraints, supply chain considerations, or application-specific performance needs within the allowed parameter ranges.

Substiute Parts

UG4A-M3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 1195UG4A-M3/54 Datasheet

Current PartRFQ

1N5400G

Taiwan Semiconductor CorporationIn Stock: 18811N5400G Datasheet

MFR RecommendedRFQ

EGP30A

Fairchild SemiconductorIn Stock: 4600EGP30A Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the UG4A-M3/54 are qualified based on the following criteria:

Electrical Compatibility Parameters:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50 V
• Package / Case: Must be DO-201AD, Axial through-hole configuration
• Operating Temperature Range: Must accommodate -55°C to 150°C junction temperature or broader range
• RoHS Status: Must maintain ROHS3 compliance

Current Rating Consideration: The UG4A-M3/54 is rated for 4 A average rectified current. Substitute parts with lower current ratings (3 A) are acceptable for applications where the full 4 A capacity is not required. Substitutes with equal or higher current ratings provide direct replacement capability.

Recovery Characteristics: Both fast recovery (≤ 500ns) and standard recovery (> 500ns) diodes are included as substitutes. Fast recovery diodes provide equivalent or superior performance; standard recovery diodes are acceptable where switching speed is not a limiting design factor.

Parameter Comparison

Engineering Selection Recommendations

1N5400G (Taiwan Semiconductor Corporation)

The 1N5400G is an active product with ROHS3 compliance matching the main part specification. This substitute operates at identical reverse voltage (50 V) and junction temperature range (-55 to 150°C). The current rating is reduced to 3 A, making this substitute suitable for applications where the full 4 A capacity of the UG4A-M3/54 is not required. The 1N5400G employs standard recovery characteristics (> 500ns), which differs from the fast recovery profile of the main part. Forward voltage is specified at 1.1 V @ 3 A, compared to 950 mV @ 4 A for the main part.

EGP30A (Fairchild Semiconductor)

The EGP30A is an active product with fast recovery characteristics matching the main part's speed classification (≤ 500ns). This substitute maintains 50 V reverse voltage rating and extends the operating temperature range to -65 to 150°C, providing broader thermal capability. The current rating is 3 A. Forward voltage is specified at 950 mV @ 3 A, matching the main part's forward voltage characteristic. Reverse recovery time is specified at 50 ns, compared to 30 ns for the main part. RoHS compliance status is not specified for this substitute. Capacitance is elevated at 95 pF @ 4V, 1MHz compared to 20 pF for the main part.

Frequently Asked Questions (FAQ)

Q: Can the 1N5400G replace the UG4A-M3/54 in all applications?

A: The 1N5400G is suitable for applications where the average rectified current requirement does not exceed 3 A. Both parts share identical 50 V reverse voltage rating, DO-201AD package configuration, and operating temperature range. The 1N5400G uses standard recovery characteristics; applications requiring fast recovery switching performance should evaluate circuit timing requirements.

Q: What is the primary difference between the two substitute parts?

A: The 1N5400G employs standard recovery characteristics (> 500ns), while the EGP30A maintains fast recovery performance (≤ 500ns) matching the main part. Both substitutes are rated for 3 A average rectified current. The EGP30A provides extended temperature range (-65 to 150°C) and specifies reverse recovery time at 50 ns.

Q: Are all three parts mechanically interchangeable?

A: Yes. The UG4A-M3/54, 1N5400G, and EGP30A all use the DO-201AD axial through-hole package configuration, enabling direct mechanical substitution in PCB designs.

Q: What compliance certifications apply to each part?

A: The UG4A-M3/54 and 1N5400G are both ROHS3 compliant. The EGP30A RoHS compliance status is not specified in the provided data. All three parts are REACH Unaffected.

Q: Can I use a 3 A rated substitute in a circuit designed for 4 A?

A: No. Using a 3 A rated diode in a circuit requiring 4 A operation exceeds the component's current rating and creates reliability risk. The substitute must be selected based on actual circuit current requirements.

Q: How do the forward voltage characteristics compare?

A: The UG4A-M3/54 and EGP30A both specify 950 mV forward voltage. The 1N5400G specifies 1.1 V forward voltage. Forward voltage differences affect power dissipation and thermal performance in rectifier circuits.

Q: What is the significance of reverse recovery time differences?

A: The UG4A-M3/54 specifies 30 ns reverse recovery time, while the EGP30A specifies 50 ns. The 1N5400G does not specify this parameter. Reverse recovery time affects switching transients and electromagnetic interference characteristics in high-frequency applications.