US2DB-HF Equivalent & Substitute Parts

Part Overview

The US2DB-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 200 V DC reverse voltage and 2 A average rectified current in a surface mount SMB/DO-214AA package. This component is classified as Active product status and is RoHS3 compliant. Equivalent and substitute parts are identified based on matching or exceeding the electrical and mechanical specifications of the original component, enabling procurement flexibility and supply chain continuity.

Substiute Parts

US2DB-HF

Comchip TechnologyIn Stock: 770US2DB-HF Datasheet

Current PartRFQ

ES2DB

MDDIn Stock: 273792ES2DB Datasheet

Parametric EquivalentRFQ

HS2D

SURGEIn Stock: 15287HS2D Datasheet

Parametric EquivalentRFQ

UF2D_R1_00001

Panjit International Inc.In Stock: 1987UF2D_R1_00001 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the US2DB-HF are qualified based on the following critical parameters:

Mandatory Matching Criteria:

• Voltage - DC Reverse (Vr) (Max): 200 V minimum
• Package / Case: DO-214AA or SMB equivalent
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant

Current Rating Consideration:

• Primary substitutes maintain 2 A average rectified current
• Secondary substitutes with reduced current rating (1.5 A) are identified separately due to lower current capacity

Electrical Performance:

• Forward voltage drop, reverse recovery time, and reverse leakage current are documented for comparison
• Fast recovery technology (≤500 ns, >200 mA) is maintained across all qualified substitutes

All substitute parts listed are Active product status and operate within the same junction temperature range (-55°C to 150°C).

Parameter Comparison

Engineering Selection Recommendations

Full Equivalents (2 A Current Rating):

The ES2DB (MDD) and UF2D_R1_00001 (Panjit International Inc.) are direct parametric equivalents to the US2DB-HF. Both parts maintain the 2 A average rectified current specification, 200 V reverse voltage rating, and DO-214AA/SMB package format. All three parts are RoHS3 compliant and Active product status. The ES2DB features a faster reverse recovery time (35 ns versus 50 ns), while the UF2D_R1_00001 exhibits lower reverse leakage current (1 µA versus 5 µA). Both alternatives are suitable for direct substitution in applications requiring the full 2 A current capacity.

Reduced Current Substitute (1.5 A Current Rating):

The HS2D (SURGE) is a parametric equivalent with a reduced average rectified current rating of 1.5 A. This part maintains the 200 V reverse voltage, DO-214AA/SMB package, and RoHS3 compliance. The HS2D is applicable only in applications where the circuit design accommodates a maximum 1.5 A current requirement and does not demand the full 2 A capacity of the original US2DB-HF.

Compliance and Availability:

All substitute parts are Active product status with RoHS3 compliance certification. The ES2DB offers the highest inventory availability (273,689 pieces), followed by HS2D (15,200 pieces) and UF2D_R1_00001 (1,962 pieces). Selection should account for application current requirements, reverse recovery performance needs, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can the ES2DB replace the US2DB-HF in all applications?

A: The ES2DB is a full parametric equivalent with matching voltage and current ratings, package format, and operating temperature range. Both parts are RoHS3 compliant and Active product status. The ES2DB features a faster reverse recovery time (35 ns), which is advantageous in high-frequency switching applications. Direct substitution is supported.

Q: What is the key difference between the UF2D_R1_00001 and the US2DB-HF?

A: The UF2D_R1_00001 matches the US2DB-HF in voltage rating, current capacity, and package format. The primary difference is lower reverse leakage current (1 µA versus 5 µA at 200 V), which may reduce power dissipation in low-current standby conditions. Both parts are suitable for direct substitution.

Q: Why is the HS2D listed as a substitute if it has a lower current rating?

A: The HS2D is included as a parametric equivalent for applications where the circuit design operates at or below 1.5 A average rectified current. It maintains the same voltage rating, package format, and compliance certifications. Selection of the HS2D requires confirmation that the application does not exceed 1.5 A current demand.

Q: Are all substitute parts available in the same packaging format?

A: All substitute parts use the DO-214AA/SMB surface mount package. The US2DB-HF and UF2D_R1_00001 are supplied in Tape & Reel (TR) packaging, while the ES2DB is also supplied in Tape & Reel format. The HS2D is supplied in Bag packaging. Confirm packaging requirements with procurement specifications before selection.

Q: Do all parts meet RoHS3 compliance?

A: Yes. The US2DB-HF, ES2DB, HS2D, and UF2D_R1_00001 are all RoHS3 compliant. This certification applies to all substitute parts listed in this reference.

Q: What is the operating temperature range for these diodes?

A: All parts, including the US2DB-HF and its substitutes, operate across a junction temperature range of -55°C to 150°C. This range is consistent across all qualified alternatives.

Q: How do reverse recovery times affect circuit performance?

A: Reverse recovery time (trr) determines the speed at which the diode transitions from forward conduction to reverse blocking. The ES2DB has a faster recovery time (35 ns) compared to the US2DB-HF (50 ns), which reduces switching losses in high-frequency applications. The HS2D and UF2D_R1_00001 match the original 50 ns specification. Selection depends on circuit switching frequency requirements.