ES1FLH Equivalent & Substitute Parts

Part Overview

The ES1FLH is a 300V, 1A super fast recovery diode manufactured by Taiwan Semiconductor Corporation, designed for surface mount applications in the SOD-123 package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. The part carries automotive-grade qualification (AEC-Q101) and is RoHS3 compliant. Due to its discontinued status, identification of functionally equivalent substitute components is necessary for ongoing production support, maintenance applications, and design transitions to active alternatives.

Substiute Parts

ES1FLH

Taiwan Semiconductor CorporationIn Stock: 974ES1FLH Datasheet

Current PartRFQ

ES1GLWH

Taiwan Semiconductor CorporationIn Stock: 20300ES1GLWH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ES1FLH is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Reverse voltage rating (Vr) must equal or exceed 300V
• Average rectified current (Io) must equal or exceed 1A
• Forward voltage (Vf) must not exceed 1.3V at 1A
• Reverse recovery time (trr) must not exceed 35ns
• Reverse leakage current must not exceed 5µA at rated voltage

Mechanical Compatibility Criteria:

• Surface mount mounting type
• Package footprint compatibility with SOD-123 or equivalent form factor
• Automotive-grade qualification (AEC-Q101)
• RoHS3 compliance

The ES1GLWH meets these substitution criteria with the following characteristics: it maintains identical electrical performance in forward voltage, reverse recovery time, and leakage current specifications, while providing enhanced reverse voltage rating (400V) and extended junction temperature range (-55°C to 175°C). The package transition from SOD-123 to SOD-123W represents a compatible footprint variant suitable for the same application space.

Parameter Comparison

Engineering Selection Recommendations

The ES1GLWH is the designated manufacturer substitute for the ES1FLH. Selection of this substitute is supported by the following engineering factors:

Compliance and Certification: Both parts maintain identical automotive-grade qualification (AEC-Q101) and RoHS3 compliance status, ensuring regulatory continuity in applications requiring these certifications.

Product Status: The ES1GLWH holds active production status, whereas the ES1FLH is classified as "Not For New Designs." This distinction makes the ES1GLWH the appropriate choice for ongoing production requirements and new design implementations.

Electrical Performance: The substitute part delivers identical electrical characteristics in the parameters that define rectifier functionality: forward voltage drop, reverse recovery time, and leakage current. The increased reverse voltage rating (400V versus 300V) provides design margin without introducing incompatibility.

Thermal Performance: The extended junction temperature range (-55°C to 175°C versus -55°C to 150°C) in the ES1GLWH accommodates a broader operational envelope, beneficial for applications subject to elevated ambient conditions.

Package Compatibility: The SOD-123W package represents a compatible footprint variant of the SOD-123, maintaining surface mount compatibility while accommodating the substitute part's thermal and electrical enhancements.

Frequently Asked Questions (FAQ)

Q: Can the ES1GLWH directly replace the ES1FLH in existing designs?

A: Yes. The ES1GLWH meets or exceeds all electrical specifications of the ES1FLH. The package transition from SOD-123 to SOD-123W is a compatible footprint variant suitable for surface mount applications. Verification of PCB layout compatibility with the SOD-123W package dimensions is required prior to implementation.

Q: What is the primary difference between ES1FLH and ES1GLWH?

A: The ES1GLWH provides a higher reverse voltage rating (400V versus 300V) and an extended operating temperature range (-55°C to 175°C versus -55°C to 150°C). All other electrical parameters remain identical. The ES1GLWH is an active production part, while the ES1FLH is discontinued.

Q: Are both parts automotive-qualified?

A: Yes. Both the ES1FLH and ES1GLWH carry AEC-Q101 automotive qualification and are RoHS3 compliant, making them suitable for automotive and industrial applications requiring these certifications.

Q: Does the package change from SOD-123 to SOD-123W affect circuit performance?

A: No. The SOD-123W is a compatible footprint variant of SOD-123. Both packages are surface mount diode packages with identical electrical performance. PCB layout must accommodate the physical dimensions of the SOD-123W package.

Q: What is the reverse recovery time specification, and why is it important?

A: Both parts specify a reverse recovery time (trr) of 35 nanoseconds, classifying them as super fast recovery diodes. This parameter defines the speed at which the diode transitions from forward conduction to reverse blocking, critical for high-frequency switching applications and power supply circuits.

Q: Can the ES1GLWH be used in applications rated for 300V if the circuit design only requires 300V operation?

A: Yes. The ES1GLWH's 400V rating exceeds the 300V requirement and introduces no incompatibility. Higher voltage ratings provide design margin and do not degrade performance in lower-voltage applications.

Q: What inventory status should influence component selection?

A: The ES1GLWH maintains significantly higher inventory availability (20,229 pieces) compared to the ES1FLH (898 pieces). For production planning and supply chain continuity, the ES1GLWH is the preferred selection.