ES1A-HF Equivalent & Substitute Parts

Part Overview

The ES1A-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 50 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. The device is classified as Active product status and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1). This diode is suitable for applications requiring fast recovery characteristics with a reverse recovery time of 35 nanoseconds.

Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across manufacturers, ensuring functional interchangeability in circuit designs without performance degradation.

Substiute Parts

ES1A-HF

Comchip TechnologyIn Stock: 783ES1A-HF Datasheet

Current PartRFQ

US1A-E3/5AT

Vishay General Semiconductor - Diodes DivisionIn Stock: 5736US1A-E3/5AT Datasheet

Parametric EquivalentRFQ

US1A-E3/61T

Vishay General Semiconductor - Diodes DivisionIn Stock: 4006US1A-E3/61T Datasheet

Parametric EquivalentRFQ

US1A_R1_00001

Panjit International Inc.In Stock: 2863US1A_R1_00001 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ES1A-HF is determined by strict equivalence across the following critical parameters:

Mandatory Equivalence Parameters:

• Voltage - DC Reverse (Vr) (Max): 50 V
• Current - Average Rectified (Io): 1 A
• Voltage - Forward (Vf) (Max) @ If: 1 V @ 1 A
• Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)
• Package / Case: DO-214AC, SMA
• Operating Temperature - Junction: -55°C to 150°C
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Allowable Variation Parameters:

• Reverse Recovery Time (trr): Permitted to vary within fast recovery classification
• Current - Reverse Leakage @ Vr: Permitted to vary within specified limits
• Capacitance @ Vr, F: Permitted to vary within specified limits

All three identified substitute parts (US1A-E3/5AT, US1A-E3/61T, and US1A_R1_00001) maintain mandatory equivalence across all critical parameters, confirming their status as parametric equivalents to the ES1A-HF.

Parameter Comparison

Engineering Selection Recommendations

All three substitute parts maintain full parametric equivalence to the ES1A-HF across mandatory electrical and mechanical specifications. Selection among these alternatives is based on the following factors:

Comchip ES1A-HF: Primary specification with 35 ns reverse recovery time, representing the fastest recovery characteristic among the group. Current inventory: 768 pieces.

Vishay US1A-E3/5AT: Parametric equivalent with 50 ns reverse recovery time. Maintains all mandatory specifications with higher inventory availability (5,649 pieces). REACH Unaffected status confirmed.

Vishay US1A-E3/61T: Parametric equivalent with 50 ns reverse recovery time. Maintains all mandatory specifications with substantial inventory (3,900 pieces). REACH Unaffected status confirmed.

Panjit US1A_R1_00001: Parametric equivalent with 50 ns reverse recovery time and lowest reverse leakage current (1 µA @ 50 V). Maintains all mandatory specifications with inventory of 2,805 pieces. REACH Unaffected status confirmed.

All parts are Active product status, RoHS3 compliant, and carry MSL 1 (Unlimited) rating. Selection may be determined by supply chain availability, lead time requirements, or specific application performance preferences regarding reverse recovery time and leakage current characteristics.

Frequently Asked Questions (FAQ)

Q: Can US1A-E3/5AT be used as a direct replacement for ES1A-HF?

A: Yes. The US1A-E3/5AT maintains equivalence across all mandatory parameters: 50 V reverse voltage rating, 1 A average rectified current, 1 V forward voltage at 1 A, fast recovery classification, DO-214AC (SMA) package, -55°C to 150°C operating temperature range, RoHS3 compliance, and MSL 1 rating. The 50 ns reverse recovery time is within the fast recovery specification.

Q: What is the difference between the ES1A-HF and US1A_R1_00001?

A: Both parts are parametric equivalents with identical voltage, current, and package specifications. The primary differences are: ES1A-HF has 35 ns reverse recovery time versus 50 ns for US1A_R1_00001; ES1A-HF has 5 µA reverse leakage current versus 1 µA for US1A_R1_00001; US1A_R1_00001 has 17 pF capacitance versus 15 pF for ES1A-HF. These variations remain within allowable parameters for fast recovery diode classification.

Q: Are all substitute parts in the same package?

A: Yes. All parts use the DO-214AC (SMA) surface mount package, ensuring mechanical and electrical compatibility in PCB layouts without modification.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. ES1A-HF, US1A-E3/5AT, US1A-E3/61T, and US1A_R1_00001 are all RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level.

Q: Which substitute part has the fastest reverse recovery time?

A: The ES1A-HF has the fastest reverse recovery time at 35 nanoseconds. The three substitute parts (US1A-E3/5AT, US1A-E3/61T, and US1A_R1_00001) all have 50 ns reverse recovery time, which remains within the fast recovery classification specification.

Q: Can these parts be used interchangeably in high-frequency switching applications?

A: All parts maintain the fast recovery classification (≤ 500ns, > 200mA) and identical forward voltage characteristics. Interchangeability in high-frequency applications is determined by the specific circuit requirements for reverse recovery time and leakage current. The ES1A-HF offers superior reverse recovery performance at 35 ns, while US1A_R1_00001 offers superior leakage current performance at 1 µA.

Q: What is the operating temperature range for all these parts?

A: All parts operate across the identical junction temperature range of -55°C to 150°C, ensuring thermal compatibility across applications.