ES1E Equivalent & Substitute Parts Reference

Part Overview

The ES1E is a general-purpose fast recovery diode manufactured by SMC Diode Solutions, rated for 300 V DC reverse voltage and 1 A average rectified current in a surface mount SMA (DO-214AC) package. This component is actively produced and RoHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified based on matching or exceeding critical electrical parameters including reverse voltage rating, forward current capacity, recovery speed classification, and package compatibility for direct circuit board replacement.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	300	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.3 @ 1 A	V
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5 @ 300 V	µA
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	-
Package / Case	DO-214AC, SMA	-
Mounting Type	Surface Mount	-
Operating Temperature - Junction	-55 to 150	°C

Substitute Part Grouping Explanation

Substitute parts for the ES1E are identified based on the following critical parameters:

Primary Substitution Criteria:

Voltage - DC Reverse (Vr) rating equal to or greater than 300 V
Current - Average Rectified (Io) capacity equal to or greater than 1 A
Speed classification as Fast Recovery (≤ 500ns, > 200mA) or equivalent
Package compatibility: Surface mount SMA (DO-214AC) for direct board replacement

Substitute Classification:

Direct Equivalents (Identical Electrical and Package Specifications):

ES1FH: Matches all critical parameters with identical voltage, current, recovery speed, and SMA package. Includes automotive qualification (AEC-Q101).

Parametric Equivalents (Exceeds Electrical Specifications, Different Package):

ES1F: Exceeds voltage rating (1500 V vs. 300 V) and meets current requirement (500 mA vs. 1 A minimum). Through-hole axial package requires circuit board redesign; not suitable for direct replacement in surface mount applications.

Parameter Comparison

Parameter	ES1E (Main)	ES1FH (Substitute)	ES1F (Substitute)
Manufacturer	SMC Diode Solutions	Taiwan Semiconductor Corporation	Sanken Electric USA Inc.
Voltage - DC Reverse (Vr) (Max)	300 V	300 V	1500 V
Current - Average Rectified (Io)	1 A	1 A	500 mA
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 1 A	1.3 V @ 1 A	2 V @ 500 mA
Reverse Recovery Time (trr)	35 ns	35 ns	1.5 µs
Current - Reverse Leakage @ Vr	5 µA @ 300 V	5 µA @ 300 V	10 µA @ 1500 V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA	Fast Recovery ≤ 500ns, > 200mA	Standard Recovery > 500ns, > 200mA
Capacitance @ Vr, F	45 pF @ 4V, 1MHz	16 pF @ 4V, 1MHz	-
Mounting Type	Surface Mount	Surface Mount	Through Hole
Package / Case	DO-214AC, SMA	DO-214AC, SMA	Axial
Operating Temperature - Junction	-55 to 150 °C	-55 to 150 °C	-40 to 150 °C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	RoHS Compliant
Product Status	Active	Active	Active

Engineering Selection Recommendations

ES1FH Selection Criteria:

The ES1FH is a direct functional equivalent for the ES1E in surface mount applications. Both components share identical electrical specifications: 300 V reverse voltage rating, 1 A average rectified current, 1.3 V forward voltage at 1 A, and 35 ns reverse recovery time. Both are packaged in DO-214AC (SMA) surface mount format and operate across the same temperature range (-55°C to 150°C). Both achieve RoHS3 compliance and MSL 1 rating.

The ES1FH includes automotive qualification per AEC-Q101, making it suitable for applications requiring automotive-grade components. The ES1FH exhibits lower capacitance (16 pF vs. 45 pF at 4V, 1MHz), which may provide improved performance in high-frequency switching applications.

ES1F Selection Criteria:

The ES1F is a parametric equivalent with higher voltage rating (1500 V) but lower current capacity (500 mA). This component is suitable only for applications where the circuit board layout can accommodate through-hole axial mounting. The ES1F operates at a lower minimum temperature (-40°C vs. -55°C) and exhibits slower recovery time (1.5 µs vs. 35 ns), classifying it as standard recovery rather than fast recovery. The ES1F is not suitable for direct replacement in existing ES1E surface mount designs without circuit board redesign.

Frequently Asked Questions (FAQ)

Q: Can ES1FH be used as a direct replacement for ES1E in existing circuit boards?

A: Yes. The ES1FH is a direct substitute for surface mount applications. Both components are packaged in DO-214AC (SMA) format with identical electrical ratings (300 V, 1 A, 35 ns recovery time) and operating temperature range (-55°C to 150°C). No circuit board modifications are required.

Q: What is the primary difference between ES1FH and ES1E?

A: The ES1FH includes automotive qualification (AEC-Q101) and exhibits lower junction capacitance (16 pF vs. 45 pF). Electrical performance and package form factor are identical.

Q: Can ES1F replace ES1E in a surface mount application?

A: No. The ES1F is packaged in through-hole axial format, not surface mount SMA. Circuit board redesign would be required. Additionally, the ES1F has lower current capacity (500 mA vs. 1 A) and slower recovery time (1.5 µs vs. 35 ns).

Q: What does "Fast Recovery" mean for these diodes?

A: Fast Recovery indicates reverse recovery time of 500 nanoseconds or less with forward current greater than 200 mA. Both ES1E and ES1FH achieve 35 ns recovery time, enabling operation in high-frequency switching circuits. The ES1F is classified as Standard Recovery (1.5 µs) and is not suitable for fast-switching applications.

Q: Are all three parts RoHS compliant?

A: Yes. ES1E and ES1FH are ROHS3 compliant. ES1F is RoHS compliant. All three parts meet RoHS requirements.

Q: What is the moisture sensitivity level (MSL) for these diodes?

A: ES1E and ES1FH both carry MSL 1 rating, indicating unlimited shelf life without moisture control. ES1F MSL rating is not specified in available data.

Q: Which substitute should be selected for automotive applications?

A: The ES1FH is qualified to AEC-Q101 automotive standard. For automotive applications requiring this qualification, ES1FH is the appropriate selection.

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