ES1D-HF Equivalent & Substitute Parts

Part Overview

The ES1D-HF is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 200 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as a fast recovery diode with a reverse recovery time of 35 nanoseconds, suitable for standard rectification applications requiring rapid switching characteristics.

The ES1D-HF maintains Active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when sourcing from multiple suppliers is needed for supply chain resilience.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) Maximum	200	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) Maximum @ If	1	V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 200 V
Capacitance @ Vr, F	15	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the ES1D-HF is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) Maximum: 200 V (exact match required)
Current - Average Rectified (Io): 1 A (exact match required)
Voltage - Forward (Vf) Maximum @ If: 1 V @ 1 A (exact match required)
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io) (exact match required)
Operating Temperature - Junction: -55°C to 150°C (exact match required)

Mechanical Compatibility Requirements:

Package / Case: DO-214AC, SMA (exact match required)
Mounting Type: Surface Mount (exact match required)

Compliance Requirements:

RoHS Status: ROHS3 Compliant (exact match required)
Moisture Sensitivity Level (MSL): 1 (Unlimited) (exact match required)

Substitute parts may vary in the following parameters while maintaining functional equivalence:

Reverse Recovery Time (trr): Range 35–50 ns
Current - Reverse Leakage @ Vr: Range 1–10 µA @ 200 V
Capacitance @ Vr, F: Range 15–20 pF @ 4V, 1MHz
Packaging format (Tape & Reel, Cut Tape, Bag, Digi-Reel®)
Manufacturer identity
Product status (Active or Discontinued at DiGi Electronics)

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	trr [ns]	Ir @ Vr [µA]	C @ Vr [pF]	Package	Packaging Format	Product Status
ES1D-HF	Comchip Technology	200	1	1 @ 1 A	35	5 @ 200 V	15 @ 4V, 1MHz	DO-214AC, SMA	Tape & Reel (TR)	Active
ES1D	EVVO Semi	200	1	1 @ 1 A	35	5 @ 200 V	15 @ 4V, 1MHz	DO-214AC, SMA	Cut Tape (CT) & Digi-Reel®	Active
HS1D	SURGE	200	1	1 @ 1 A	50	5 @ 200 V	20 @ 4V, 1MHz	DO-214AC, SMA	Bag	Active
HS1D R3G	Taiwan Semiconductor Corporation	200	1	1 @ 1 A	50	5 @ 200 V	15 @ 4V, 1MHz	DO-214AC, SMA	Cut Tape (CT)	Discontinued at DiGi Electronics
US1D	SMC Diode Solutions	200	1	1 @ 1 A	Not specified	Not specified	Not specified	SMA	Cut Tape (CT) & Digi-Reel®	Active
US1D R3G	Taiwan Semiconductor Corporation	200	1	1 @ 1 A	50	5 @ 200 V	15 @ 4V, 1MHz	DO-214AC, SMA	Tape & Reel (TR)	Discontinued at DiGi Electronics
US1D-E3/5AT	Vishay General Semiconductor - Diodes Division	200	1	1 @ 1 A	50	10 @ 200 V	15 @ 4V, 1MHz	DO-214AC, SMA	Tape & Reel (TR)	Active
US1D-E3/61T	Vishay General Semiconductor - Diodes Division	200	1	1 @ 1 A	50	10 @ 200 V	15 @ 4V, 1MHz	DO-214AC, SMA	Cut Tape (CT)	Active
US1DH	Taiwan Semiconductor Corporation	200	1	1 @ 1 A	50	5 @ 200 V	15 @ 4V, 1MHz	DO-214AC, SMA	Tape & Reel (TR)	Active
US1DHE3_A/H	Vishay General Semiconductor - Diodes Division	200	1	1 @ 1 A	50	10 @ 200 V	15 @ 4V, 1MHz	DO-214AC, SMA	Tape & Reel (TR)	Active
US1D_R1_00001	Panjit International Inc.	200	1	1 @ 1 A	50	1 @ 200 V	17 @ 4V, 1MHz	DO-214AC, SMA	Tape & Reel (TR)	Active

Engineering Selection Recommendations

Primary Equivalent (Highest Compatibility):

The ES1D manufactured by EVVO Semi is the closest electrical and mechanical equivalent to the ES1D-HF. Both parts share identical electrical specifications including reverse recovery time of 35 nanoseconds, reverse leakage current of 5 µA, and capacitance of 15 pF. The primary difference is packaging format: ES1D is supplied in Cut Tape (CT) and Digi-Reel® formats, whereas ES1D-HF is supplied in Tape & Reel (TR). Both maintain Active product status and full RoHS3 compliance.

Secondary Equivalents (Acceptable Substitutes):

The following parts meet all electrical and mechanical requirements with minor parameter variations:

US1DH (Taiwan Semiconductor Corporation): Identical electrical specifications to ES1D-HF with reverse recovery time of 50 ns (within acceptable range). Supplied in Tape & Reel format. Active product status. Includes AEC-Q101 automotive qualification.
US1D_R1_00001 (Panjit International Inc.): Meets all electrical requirements with reverse recovery time of 50 ns. Reverse leakage current of 1 µA is superior to the ES1D-HF specification of 5 µA. Capacitance of 17 pF is within acceptable range. Active product status.
US1D-E3/61T (Vishay General Semiconductor - Diodes Division): Meets all electrical requirements with reverse recovery time of 50 ns. Reverse leakage current of 10 µA is within acceptable range. Supplied in Cut Tape format. Active product status with high inventory availability (83,847 pieces).
US1D-E3/5AT (Vishay General Semiconductor - Diodes Division): Identical specifications to US1D-E3/61T with Tape & Reel packaging. Active product status.
US1DHE3_A/H (Vishay General Semiconductor - Diodes Division): Meets all electrical requirements with AEC-Q101 automotive qualification. Reverse recovery time of 50 ns. Supplied in Tape & Reel format. Active product status.

Acceptable Substitutes with Noted Variations:

HS1D (SURGE): Meets all electrical requirements. Reverse recovery time of 50 ns and capacitance of 20 pF represent acceptable variations. Supplied in Bag format. Active product status.
HS1D R3G (Taiwan Semiconductor Corporation): Meets all electrical requirements with reverse recovery time of 50 ns. Discontinued at DiGi Electronics; use only if supply chain continuity is not a concern.
US1D R3G (Taiwan Semiconductor Corporation): Meets all electrical requirements with reverse recovery time of 50 ns. Discontinued at DiGi Electronics; use only if supply chain continuity is not a concern.
US1D (SMC Diode Solutions): Meets core electrical requirements (200 V, 1 A, 1 V forward voltage). Detailed specifications for reverse recovery time, leakage current, and capacitance are not provided; verification against application requirements is necessary. Active product status.

Automotive Applications:

For applications requiring automotive-grade components, US1DH and US1DHE3_A/H are qualified to AEC-Q101 standard and are suitable replacements for the ES1D-HF in automotive environments.

Frequently Asked Questions (FAQ)

Q: Can I substitute ES1D-HF with ES1D from EVVO Semi?

A: Yes. The ES1D is electrically and mechanically equivalent to ES1D-HF with identical voltage, current, forward voltage, and reverse recovery time specifications. The primary difference is packaging format: ES1D is supplied in Cut Tape and Digi-Reel® formats, while ES1D-HF is supplied in Tape & Reel. Both are RoHS3 compliant with MSL 1 rating.

Q: What is the significance of reverse recovery time (trr) variation between 35 ns and 50 ns?

A: The ES1D-HF has a reverse recovery time of 35 nanoseconds, while most substitute parts have 50 nanoseconds. Both values fall within the fast recovery classification (≤ 500 ns). The 15 nanosecond difference represents acceptable variation for general-purpose rectification applications. Applications with stringent switching speed requirements should verify compatibility with the specific circuit design.

Q: Are discontinued parts suitable for new designs?

A: Parts marked as "Discontinued at DiGi Electronics" (HS1D R3G and US1D R3G) meet all electrical and mechanical specifications and are functionally equivalent. However, discontinued parts present supply chain risk. These parts are suitable only for replacement or repair of existing designs where supply continuity is not a primary concern. For new designs, select from parts with Active product status.

Q: What is the difference between Tape & Reel, Cut Tape, and Digi-Reel® packaging?

A: These are different supply formats for surface mount components:

Tape & Reel (TR): Components on continuous tape wound on a reel, suitable for high-volume automated assembly.
Cut Tape (CT): Tape cut into smaller segments, suitable for lower-volume production or prototyping.
Digi-Reel®: A proprietary format combining tape and reel characteristics for flexible ordering quantities.
Bag: Loose components in bulk packaging, typically for manual assembly or lower-volume applications.

All formats contain the same component; selection depends on manufacturing process and volume requirements.

Q: Can I use US1D-E3/61T (Cut Tape) in place of ES1D-HF (Tape & Reel)?

A: Yes, from an electrical and mechanical standpoint. US1D-E3/61T meets all electrical specifications and is housed in the same DO-214AC (SMA) package. The difference is packaging format. If your assembly process accommodates Cut Tape format, this substitution is valid. Verify with your manufacturing equipment specifications.

Q: What does AEC-Q101 qualification mean?

A: AEC-Q101 is an automotive industry standard qualification for discrete semiconductors. Parts bearing this qualification (US1DH and US1DHE3_A/H) have undergone additional testing and reliability screening for automotive applications. These parts are suitable for use in automotive environments where component reliability and traceability are critical.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, matching the ES1D-HF specifications.

Q: Which substitute part has the lowest reverse leakage current?

A: US1D_R1_00001 (Panjit International Inc.) has a reverse leakage current of 1 µA @ 200 V, compared to 5 µA for the ES1D-HF. This represents superior leakage performance. Most other substitutes have leakage currents of 5–10 µA, all within acceptable ranges for general-purpose rectification.

Q: Can I mix different substitute parts in the same circuit board?

A: Yes. All listed substitute parts are electrically and mechanically equivalent and can be used interchangeably in the same circuit. However, for manufacturing traceability and quality control, it is recommended to standardize on a single part number per design revision.

Q: What inventory levels are available for each substitute?

A: Inventory availability varies significantly. US1D-E3/61T has the highest inventory (83,847 pieces), followed by ES1D (140,400 pieces). Parts with lower inventory (HS1D R3G: 5,188 pieces; US1D R3G: 5,558 pieces) may have longer lead times. Verify current inventory with your supplier before finalizing part selection.

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