ER1A-LTP Equivalent & Substitute Parts

Part Overview

The ER1A-LTP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 50 V DC reverse voltage and 1 A average rectified current in a DO-214AA (SMB) surface mount package. This component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identification of equivalent and substitute parts is necessary to support existing designs, legacy system maintenance, and production continuity where the original part is no longer available or inventory is depleted.

Substiute Parts

ER1A-LTP

Micro Commercial CoIn Stock: 1144ER1A-LTP Datasheet

Current PartRFQ

MURS105T3G

onsemiIn Stock: 10462MURS105T3G Datasheet

DirectRFQ

ES2A

YAGEOIn Stock: 26263ES2A Datasheet

SimilarRFQ

ES2A-E3/5BT

Vishay General Semiconductor - Diodes DivisionIn Stock: 1050ES2A-E3/5BT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ER1A-LTP is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50 V
• Current - Average Rectified (Io): Must equal or exceed 1 A
• Package / Case: Must be DO-214AA (SMB) for mechanical and thermal compatibility
• Speed Classification: Must be Fast Recovery ≤ 500ns, > 200mA (Io)
• Reverse Recovery Time (trr): Must be ≤ 35 ns
• Operating Temperature Range: Must encompass or exceed -65°C ~ 175°C
• RoHS Status: Must be ROHS3 Compliant
• Moisture Sensitivity Level (MSL): Must be 1 (Unlimited)

Direct Equivalents meet all primary criteria with identical or superior electrical performance and identical package specifications.

Functional Substitutes meet voltage, current, and package requirements but may have variations in secondary parameters such as forward voltage, reverse leakage, or operating temperature range. These parts are electrically compatible within the application's design margins.

Parameter Comparison

Engineering Selection Recommendations

MURS105T3G (onsemi) - Direct Equivalent

The MURS105T3G is the primary substitute for the ER1A-LTP. This part is manufactured by onsemi and carries Active product status, ensuring ongoing availability and support. It meets all primary substitution criteria: 50 V reverse voltage rating, 1 A average rectified current, DO-214AA (SMB) package, Fast Recovery speed classification, 35 ns reverse recovery time, and -65°C ~ 175°C operating temperature range. The MURS105T3G exhibits superior forward voltage performance (875 mV @ 1 A versus 950 mV @ 1 A) and lower reverse leakage current (2 µA @ 50 V versus 5 µA @ 50 V), resulting in improved efficiency and reduced power dissipation. Both parts are ROHS3 Compliant with MSL 1 (Unlimited). Packaging is available in Cut Tape (CT) and Digi-Reel® formats, suitable for automated assembly processes.

ES2A (YAGEO) - Functional Substitute

The ES2A is a functional substitute manufactured by YAGEO with Active product status. This part shares the 50 V reverse voltage rating and DO-214AA package with the ER1A-LTP. Complete electrical specifications are not provided in the available data; however, the part is confirmed ROHS3 Compliant with MSL 1 (Unlimited). The ES2A is available in Tape & Reel (TR) packaging. Selection of this part requires verification of current rating and speed classification against application requirements.

ES2A-E3/5BT (Vishay General Semiconductor - Diodes Division) - Functional Substitute

The ES2A-E3/5BT is a functional substitute manufactured by Vishay General Semiconductor - Diodes Division with Active product status. This part exceeds the ER1A-LTP in current rating (2 A versus 1 A) and meets the 50 V reverse voltage requirement. It features Fast Recovery speed classification and 30 ns reverse recovery time (superior to the 35 ns specification). Forward voltage is 900 mV @ 2 A. The operating temperature range is -50°C ~ 150°C, which does not extend to the lower temperature limit of the ER1A-LTP (-65°C). This part is suitable for applications operating within -50°C ~ 150°C. Both parts are ROHS3 Compliant with MSL 1 (Unlimited). Packaging is Tape & Reel (TR).

Frequently Asked Questions (FAQ)

Q: Can the MURS105T3G be used as a direct replacement for the ER1A-LTP in all applications?

A: The MURS105T3G meets all primary electrical and mechanical substitution criteria for the ER1A-LTP. Both parts are rated for 50 V reverse voltage, 1 A average rectified current, and feature identical DO-214AA (SMB) packaging. The MURS105T3G demonstrates superior performance characteristics with lower forward voltage and reverse leakage current. Substitution is valid for applications operating within the -65°C ~ 175°C temperature range.

Q: What is the difference between the ER1A-LTP and ES2A-E3/5BT?

A: The ES2A-E3/5BT is rated for 2 A average rectified current, exceeding the 1 A rating of the ER1A-LTP. The ES2A-E3/5BT operating temperature range is -50°C ~ 150°C, which does not include the lower temperature limit of -65°C specified for the ER1A-LTP. Both parts share the 50 V reverse voltage rating and DO-214AA package. The ES2A-E3/5BT is suitable for applications that do not require operation below -50°C.

Q: Are all substitute parts available in the same packaging format as the ER1A-LTP?

A: The ER1A-LTP is supplied in Tape & Reel (TR) packaging. The MURS105T3G is available in Cut Tape (CT) and Digi-Reel® formats. The ES2A and ES2A-E3/5BT are supplied in Tape & Reel (TR) packaging, matching the original part format. Packaging format selection depends on assembly equipment compatibility and procurement requirements.

Q: Why is the ER1A-LTP marked as "Not For New Designs"?

A: The "Not For New Designs" status indicates the ER1A-LTP has reached end-of-life and is no longer recommended for new product development. Active substitute parts such as MURS105T3G, ES2A, and ES2A-E3/5BT are recommended for new designs. The ER1A-LTP remains available for legacy system support and maintenance applications.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. The MURS105T3G, ES2A, and ES2A-E3/5BT are all ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited), matching the compliance profile of the ER1A-LTP.

Q: What is the significance of the reverse recovery time (trr) parameter?

A: Reverse recovery time is the interval required for a diode to transition from forward conduction to reverse blocking when the applied voltage reverses polarity. The ER1A-LTP specifies 35 ns trr. The MURS105T3G matches this specification at 35 ns, while the ES2A-E3/5BT offers superior performance at 30 ns. Lower reverse recovery time reduces switching losses and improves efficiency in high-frequency applications. All substitute parts meet the Fast Recovery classification (≤ 500ns, > 200mA).

Q: Can the ES2A be used if complete electrical specifications are not available?

A: The ES2A shares the 50 V reverse voltage rating and DO-214AA package with the ER1A-LTP. However, complete electrical specifications including current rating, forward voltage, and speed classification are not provided in the available data. Use of the ES2A requires independent verification that its electrical characteristics meet application requirements before implementation.