UF3001 Equivalent & Substitute Parts

Part Overview

The UF3001 is a general-purpose rectifier diode manufactured by Diodes Incorporated, rated for 50 V DC reverse voltage and 3 A average rectified current in a DO-201AD axial through-hole package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	50 V
Current - Average Rectified (Io)	3 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 50 V
Package / Case	DO-201AD, Axial
Mounting Type	Through Hole
Operating Temperature - Junction	-65°C ~ 150°C

Substitute Part Grouping Explanation

Substitution of the UF3001 rectifier diode is determined by the following critical parameters:

Voltage Rating: All substitute parts must maintain a maximum DC reverse voltage (Vr) of 50 V or greater to ensure safe operation within the original circuit design envelope.

Current Rating: The average rectified current (Io) must be 3 A or greater to support the same load conditions. Parts with lower current ratings cannot be considered direct substitutes.

Package Compatibility: The DO-201AD axial through-hole package is required for mechanical and electrical compatibility with existing PCB layouts and assembly processes.

Recovery Characteristics: Fast recovery speed (≤ 500ns) is a defining characteristic of the UF3001 and is preserved in equivalent alternatives to maintain switching performance.

Temperature Range: The operating junction temperature range of -65°C to 150°C establishes the thermal operating envelope for substitution candidates.

The substitute parts identified—1N5400-E3/54, 1N5802, and EGP30A—meet these core electrical and mechanical requirements with variations in secondary parameters such as forward voltage drop, reverse leakage current, and capacitance.

Parameter Comparison

Parameter	UF3001	1N5400-E3/54	1N5802	EGP30A
Manufacturer	Diodes Incorporated	Vishay General Semiconductor	Microchip Technology	Fairchild Semiconductor
Voltage - DC Reverse (Vr) (Max)	50 V	50 V	50 V	50 V
Current - Average Rectified (Io)	3 A	3 A	1 A	3 A
Voltage - Forward (Vf) (Max) @ If	1 V @ 3 A	1.2 V @ 3 A	875 mV @ 1 A	950 mV @ 3 A
Speed Classification	Fast Recovery ≤ 500ns	Standard Recovery > 500ns	Fast Recovery ≤ 500ns	Fast Recovery ≤ 500ns
Reverse Recovery Time (trr)	50 ns	Not specified	25 ns	50 ns
Current - Reverse Leakage @ Vr	5 µA @ 50 V	5 µA @ 50 V	1 µA @ 50 V	5 µA @ 50 V
Capacitance @ Vr, F	75pF @ 4V, 1MHz	30pF @ 4V, 1MHz	25pF @ 10V, 1MHz	95pF @ 4V, 1MHz
Package / Case	DO-201AD, Axial	DO-201AD, Axial	A, Axial	DO-201AD, Axial
Operating Temperature - Junction	-65°C ~ 150°C	-50°C ~ 150°C	-65°C ~ 175°C	-65°C ~ 150°C
Product Status	Discontinued	Active	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	Non-compliant	Not specified

Engineering Selection Recommendations

1N5400-E3/54 (Vishay General Semiconductor)

The 1N5400-E3/54 provides full electrical equivalence with identical 50 V and 3 A ratings in the same DO-201AD package. This part is currently active in production and carries ROHS3 compliance certification. The forward voltage specification of 1.2 V at 3 A represents a 0.2 V increase over the UF3001, which may result in marginally higher power dissipation in high-current applications. The recovery speed classification differs (Standard Recovery > 500ns versus Fast Recovery ≤ 500ns), which may affect switching performance in circuits sensitive to recovery time characteristics. This part is suitable for applications where RoHS compliance is required and switching speed is not a critical constraint.

EGP30A (Fairchild Semiconductor)

The EGP30A matches the UF3001 across all critical electrical parameters: 50 V reverse voltage, 3 A current rating, fast recovery speed, and 50 ns reverse recovery time. The DO-201AD package provides direct mechanical compatibility. Forward voltage is specified at 950 mV at 3 A, representing a 50 mV improvement over the UF3001. This part is currently active in production. RoHS compliance status is not specified in the provided data. The EGP30A is suitable for applications requiring fast recovery characteristics and direct electrical performance matching.

1N5802 (Microchip Technology)

The 1N5802 is not a direct substitute for the UF3001 due to a reduced current rating of 1 A versus the required 3 A. While this part maintains the 50 V voltage rating, fast recovery speed, and superior reverse recovery time of 25 ns, the lower current capacity restricts its application to circuits requiring only 1 A or less. The package designation (A, Axial) differs from the DO-201AD specification. This part is suitable only for applications with reduced current requirements and is not recommended as a general replacement for the UF3001.

Frequently Asked Questions (FAQ)

Q: Can the 1N5400-E3/54 be used as a direct replacement for the UF3001 in all applications?

A: The 1N5400-E3/54 provides electrical equivalence in voltage and current ratings and uses the same DO-201AD package. However, the recovery speed classification differs: the 1N5400-E3/54 is rated as Standard Recovery (> 500ns) while the UF3001 is Fast Recovery (≤ 500ns). In circuits where switching speed or reverse recovery time is critical to performance, this difference must be evaluated. The forward voltage increase of 0.2 V may also affect power dissipation calculations.

Q: Why is the 1N5802 listed as a substitute if it has a lower current rating?

A: The 1N5802 is included in the substitute list based on the provided input data, but it is not a functional equivalent for applications requiring the full 3 A current capacity of the UF3001. The 1 A current rating limits its use to lower-power circuit designs. Additionally, the package designation (A, Axial) differs from the DO-201AD requirement, which may affect PCB compatibility.

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

A: The DO-201AD package is an axial through-hole configuration with specific lead spacing and dimensions. Mechanical compatibility with existing PCB layouts requires that substitute parts use the same package designation. The 1N5802, specified in package A (Axial), may have different lead spacing and is not guaranteed to be mechanically interchangeable without PCB modification.

Q: How does forward voltage affect circuit performance?

A: Forward voltage (Vf) determines the voltage drop across the diode during conduction. The UF3001 specifies 1 V at 3 A, while the 1N5400-E3/54 specifies 1.2 V at 3 A and the EGP30A specifies 950 mV at 3 A. In rectifier circuits, higher forward voltage increases power dissipation and heat generation. In precision applications, forward voltage differences may affect output voltage regulation. Circuit analysis is required to determine if the variation is acceptable.

Q: What does RoHS compliance mean for component selection?

A: RoHS (Restriction of Hazardous Substances) compliance indicates that a component meets environmental standards restricting the use of specific hazardous materials. The UF3001 is RoHS non-compliant, while the 1N5400-E3/54 is ROHS3 compliant. For applications subject to RoHS requirements or environmental regulations, the 1N5400-E3/54 is the appropriate choice. The RoHS status of the EGP30A is not specified in the provided data.

Q: Can reverse recovery time affect my circuit design?

A: Reverse recovery time (trr) is the interval required for a diode to transition from forward conduction to reverse blocking. The UF3001 specifies 50 ns, the EGP30A specifies 50 ns, and the 1N5802 specifies 25 ns. In high-frequency switching applications, shorter recovery times reduce switching losses and improve efficiency. In low-frequency rectifier circuits, recovery time differences are typically negligible. Circuit operating frequency determines the significance of this parameter.

Q: What is the impact of operating temperature range differences?

A: The UF3001 and EGP30A specify -65°C to 150°C, the 1N5400-E3/54 specifies -50°C to 150°C, and the 1N5802 specifies -65°C to 175°C. The 1N5400-E3/54 has a narrower low-temperature range, which may be a constraint in applications requiring operation below -50°C. The 1N5802 offers an extended high-temperature range to 175°C. Application temperature requirements must be verified against the substitute part specifications.

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