UD2006FR Equivalent & Substitute Parts

Part Overview

The UD2006FR is a general-purpose rectifier diode manufactured by onsemi, rated for 600 V DC reverse voltage and 20 A average rectified current in a through-hole TO-220-2 Full Pack configuration. This component is classified as obsolete, making identification of equivalent substitute parts essential for ongoing design support and procurement continuity. The fast recovery characteristic (≤500 ns) and 60 ns reverse recovery time position this diode for applications requiring rapid switching performance in power conversion circuits.

Substiute Parts

UD2006FR

onsemiIn Stock: 1015UD2006FR Datasheet

Current PartRFQ

VS-E4TU2006FP-N3

Vishay General Semiconductor - Diodes DivisionIn Stock: 3082VS-E4TU2006FP-N3 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the UD2006FR is determined by strict equivalence across the following critical parameters:

Voltage Rating: Both the main part and substitute must maintain 600 V DC reverse voltage maximum to ensure safe operation in the target circuit.

Current Rating: The 20 A average rectified current specification must be matched or exceeded to prevent thermal stress and premature failure.

Package and Mounting: Through-hole TO-220-2 Full Pack configuration is mandatory for mechanical and thermal compatibility with existing PCB layouts and heatsink interfaces.

Speed Classification: Fast recovery characteristic (≤500 ns) with reverse recovery time in the 60–61 ns range ensures switching performance consistency.

Forward Voltage: Forward voltage drop at rated current (20 A) must remain within acceptable limits to prevent excessive power dissipation variance.

Reverse Leakage Current: Leakage specifications at rated reverse voltage determine circuit standby current and thermal behavior.

The substitute part VS-E4TU2006FP-N3 meets all these criteria and is classified as active product status with enhanced compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The UD2006FR is classified as obsolete, while the VS-E4TU2006FP-N3 is active product status. Selection of the active substitute ensures long-term availability and manufacturing continuity.

Compliance and Certification: The VS-E4TU2006FP-N3 carries RoHS3 compliance certification, whereas the UD2006FR does not specify RoHS status. Both parts are REACH Unaffected and carry EAR99 ECCN classification. For applications subject to RoHS regulatory requirements, the Vishay substitute provides enhanced compliance posture.

Electrical Performance: The substitute part exhibits marginally higher forward voltage (1.63 V versus 1.4 V at 20 A) and lower reverse leakage current (15 µA versus 20 µA at 600 V). These differences are within acceptable engineering tolerance for general-purpose rectifier applications and do not preclude direct substitution.

Thermal Characteristics: The VS-E4TU2006FP-N3 supports an extended operating temperature range (−55°C to 175°C) compared to the UD2006FR (maximum 150°C junction temperature), providing greater thermal margin in demanding environments.

Packaging and Inventory: The substitute is available in tube packaging with 3053 units in stock, compared to 944 units of the obsolete part. This inventory position supports sustained procurement.

Frequently Asked Questions (FAQ)

Q: Can the VS-E4TU2006FP-N3 be used as a direct replacement for the UD2006FR in existing designs?

A: Yes. Both parts share identical voltage rating (600 V), current rating (20 A), package configuration (TO-220-2 Full Pack), and fast recovery speed classification. Electrical parameters are within compatible ranges for general-purpose rectifier applications.

Q: What is the significance of the forward voltage difference (1.4 V versus 1.63 V)?

A: The 0.23 V difference represents approximately 16% higher forward voltage drop in the substitute part. In a 20 A circuit, this translates to approximately 4.6 W additional power dissipation. Thermal design must account for this increase; however, the substitute's extended temperature rating (175°C versus 150°C) provides compensating thermal margin.

Q: Are there any package compatibility concerns?

A: No. Both parts use identical TO-220-2 Full Pack through-hole configuration. PCB footprints, lead spacing, and heatsink mounting interfaces are mechanically identical.

Q: Why does the substitute have lower reverse leakage current?

A: The 15 µA leakage specification of the VS-E4TU2006FP-N3 versus 20 µA of the UD2006FR indicates improved semiconductor material quality or manufacturing process refinement. Lower leakage reduces standby power consumption and improves circuit efficiency.

Q: What is the impact of the extended temperature range on circuit reliability?

A: The VS-E4TU2006FP-N3 supports operation to 175°C junction temperature, compared to 150°C for the UD2006FR. This 25°C additional margin improves reliability in high-ambient or high-power-density applications and extends component life under thermal stress.

Q: Is RoHS3 compliance mandatory for this substitution?

A: RoHS3 compliance is not mandatory for substitution but is advantageous for applications subject to European Union Directive 2011/65/EU or equivalent regional regulations. The substitute's RoHS3 certification provides regulatory flexibility for global supply chains.

Q: How do the reverse recovery times compare?

A: Reverse recovery times are nearly identical (60 ns versus 61 ns), ensuring equivalent switching performance in fast-switching power conversion circuits. This parameter is critical for minimizing switching losses and electromagnetic interference.