ES1ALH Equivalent & Substitute Parts

Part Overview

The ES1ALH is a 50V, 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 This component is classified as not for new designs, indicating it has been superseded in the manufacturer's product portfolio. The ES1ALH features a reverse recovery time of 35 nanoseconds and is qualified to AEC-Q101 automotive standards. Due to its discontinued status, identifying equivalent substitute parts with compatible electrical and mechanical characteristics is essential for ongoing production support and design continuity.

Substiute Parts

ES1ALH

Taiwan Semiconductor CorporationIn Stock: 950ES1ALH Datasheet

Current PartRFQ

ES1DLWH

Taiwan Semiconductor CorporationIn Stock: 36338ES1DLWH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ES1ALH is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Current rating: 1A average rectified current
• Reverse recovery time: 35 ns (fast recovery classification)
• Forward voltage drop: 950 mV @ 1A
• Reverse leakage current: 5 µA specification

Mechanical Compatibility Criteria:

• Surface mount technology requirement
• Package footprint compatibility

Regulatory & Compliance Criteria:

• RoHS3 compliance
• REACH unaffected status
• Automotive grade qualification (AEC-Q101)

The ES1DLWH qualifies as a substitute based on matching electrical performance characteristics (identical forward voltage, reverse recovery time, and reverse leakage current at rated conditions) and surface mount packaging. The ES1DLWH operates at a higher reverse voltage rating (200V versus 50V), which does not preclude substitution in applications designed for the 50V ES1ALH, as the higher voltage rating provides additional design margin. The ES1DLWH is in active product status, ensuring continued availability and supply chain stability.

Parameter Comparison

Engineering Selection Recommendations

The ES1DLWH is the manufacturer-recommended substitute for the ES1ALH. Selection of this substitute is supported by the following engineering factors:

Electrical Performance: The ES1DLWH maintains identical forward voltage characteristics (950 mV @ 1A) and reverse recovery time (35 ns), ensuring equivalent switching performance in rectification applications. The reverse leakage current specification remains at 5 µA, meeting the same leakage criteria.

Voltage Rating: The ES1DLWH features a 200V reverse voltage rating compared to the ES1ALH's 50V rating. This higher rating is compatible with applications originally designed for 50V operation and provides additional voltage margin without introducing functional incompatibility.

Compliance & Qualification: Both parts maintain ROHS3 compliance and REACH unaffected status. The ES1DLWH extends the operating temperature range to -55°C ~ 175°C, providing improved thermal performance margin compared to the ES1ALH's -55°C ~ 150°C range.

Product Lifecycle: The ES1DLWH holds active product status, ensuring long-term availability and supply chain continuity, whereas the ES1ALH is designated not for new designs.

Package Consideration: The ES1DLWH uses the SOD-123W package variant, which maintains surface mount compatibility with the original SOD-123 footprint for the ES1ALH in most applications.

Frequently Asked Questions (FAQ)

Q: Can the ES1DLWH directly replace the ES1ALH in existing designs?

A: Yes. The ES1DLWH provides equivalent electrical performance for the critical parameters: forward voltage drop, reverse recovery time, and reverse leakage current. The higher voltage rating (200V versus 50V) does not prevent substitution in 50V-rated applications.

Q: What is the difference between the SOD-123 and SOD-123W packages?

A: Both packages are surface mount diode packages with compatible footprints for most applications. The SOD-123W is a wider variant of the SOD-123 package. Verify PCB layout compatibility with your specific design before implementation.

Q: Why is the ES1ALH marked as "Not For New Designs"?

A: This designation indicates the part has been superseded by the manufacturer and is no longer recommended for new product development. The ES1DLWH is the active replacement in the manufacturer's product line.

Q: Are there any thermal performance differences between these parts?

A: The ES1DLWH supports an extended junction temperature range (-55°C ~ 175°C) compared to the ES1ALH (-55°C ~ 150°C), providing 25°C additional thermal margin at the upper operating limit.

Q: Do both parts meet automotive qualification standards?

A: The ES1ALH carries AEC-Q101 automotive qualification. Verify the ES1DLWH's automotive qualification status against your specific application requirements and quality standards documentation.

Q: What is the reverse leakage current specification difference?

A: The ES1ALH specifies 5 µA @ 50V, while the ES1DLWH specifies 5 µA @ 200V. Both maintain the same leakage current magnitude at their respective rated voltages, indicating equivalent leakage performance characteristics.