ES1A-LTP Equivalent & Substitute Parts

Part Overview

The ES1A-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-214AC (SMA) surface mount package. This part is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary to maintain design continuity, support existing production lines, and ensure component availability for legacy systems.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	950 mV @ 1 A	mV
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	ns
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 50 V
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-65 to 175	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the ES1A-LTP is determined by the following critical parameters:

Mandatory Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 50 V
Current - Average Rectified (Io): 1 A minimum
Package / Case: DO-214AC (SMA) or compatible surface mount package
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant

Allowable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: May vary within acceptable circuit design margins
Reverse Recovery Time (trr): May vary; faster recovery is acceptable
Current - Reverse Leakage @ Vr: May vary; lower leakage is acceptable
Operating Temperature - Junction: May vary; wider range is acceptable

Substitute parts are grouped into two categories:

Direct Substitutes (Same Package, Same Current Rating): Parts with identical or superior electrical characteristics in the DO-214AC (SMA) package rated for 1 A or higher.

Package Variant Substitutes (Different Package, Compatible Ratings): Parts with identical electrical ratings but in alternative surface mount packages (DO-214BA) that maintain functional equivalence in circuit applications.

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	trr	Package	Product Status
ES1A-LTP	Micro Commercial Co	50 V	1 A	950 mV @ 1 A	Fast Recovery ≤ 500ns	35 ns	DO-214AC (SMA)	Not For New Designs
MURA105T3G	onsemi	50 V	2 A	875 mV @ 1 A	Fast Recovery ≤ 500ns	30 ns	DO-214AC (SMA)	Active
CGRA4001-G	Comchip Technology	50 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns	—	DO-214AC (SMA)	Active
EGF1A-E3/5CA	Vishay General Semiconductor - Diodes Division	50 V	1 A	1 V @ 1 A	Fast Recovery ≤ 500ns	50 ns	DO-214BA (GF1)	Active
EGF1A-E3/67A	Vishay General Semiconductor - Diodes Division	50 V	1 A	1 V @ 1 A	Fast Recovery ≤ 500ns	50 ns	DO-214BA (GF1)	Active
ES1A	YAGEO	50 V	1 A	950 mV	—	DO-214AC (SMA)	Active
ES1A-13-F	Diodes Incorporated	50 V	1 A	920 mV @ 1 A	Fast Recovery ≤ 500ns	25 ns	DO-214AC (SMA)	Active
GF1A	onsemi	50 V	1 A	1 V @ 1 A	Standard Recovery >500ns	2 µs	DO-214AC (SMA)	Not For New Designs
GF1A-E3/67A	Vishay General Semiconductor - Diodes Division	50 V	1 A	1.1 V @ 1 A	Standard Recovery >500ns	2 µs	DO-214BA (GF1)	Active
RS1A-M3/61T	Vishay General Semiconductor - Diodes Division	50 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150 ns	DO-214AC (SMA)	Active
RS1AHE3_A/H	Vishay General Semiconductor - Diodes Division	50 V	1 A	1.3 V @ 1 A	Fast Recovery ≤ 500ns	150 ns	DO-214AC (SMA)	Active

Engineering Selection Recommendations

Primary Substitutes (Recommended for New Designs):

The following parts are recommended as primary substitutes based on active product status, full compliance certifications, and electrical parameter compatibility:

ES1A-13-F (Diodes Incorporated): Active status, DO-214AC (SMA) package, 50 V / 1 A rating, fast recovery characteristics (25 ns trr), forward voltage 920 mV @ 1 A. ROHS3 compliant, MSL 1.
ES1A (YAGEO): Active status, DO-214AC (SMA) package, 50 V / 1 A rating, forward voltage 950 mV. ROHS3 compliant, MSL 1. Highest inventory availability (80,200 pcs).
MURA105T3G (onsemi): Active status, DO-214AC (SMA) package, 50 V / 2 A rating (exceeds 1 A requirement), fast recovery characteristics (30 ns trr), forward voltage 875 mV @ 1 A. ROHS3 compliant, MSL 1. Provides current margin for design robustness.

Secondary Substitutes (Package Variant):

The following parts are functionally equivalent but use the DO-214BA (GF1) package instead of DO-214AC (SMA):

EGF1A-E3/5CA (Vishay General Semiconductor - Diodes Division): Active status, DO-214BA package, 50 V / 1 A rating, fast recovery characteristics (50 ns trr), forward voltage 1 V @ 1 A. ROHS3 compliant, MSL 1.
EGF1A-E3/67A (Vishay General Semiconductor - Diodes Division): Active status, DO-214BA package, 50 V / 1 A rating, fast recovery characteristics (50 ns trr), forward voltage 1 V @ 1 A. ROHS3 compliant, MSL 1.

Substitutes with Operational Constraints:

The following parts meet electrical requirements but have design limitations:

CGRA4001-G (Comchip Technology): Active status, DO-214AC (SMA) package, 50 V / 1 A rating. Standard recovery speed (>500ns) versus fast recovery of ES1A-LTP. Operating temperature range -55°C to 150°C (narrower than ES1A-LTP). ROHS3 compliant, MSL 1.
RS1A-M3/61T (Vishay General Semiconductor - Diodes Division): Active status, DO-214AC (SMA) package, 50 V / 1 A rating. Higher forward voltage (1.3 V @ 1 A) and longer reverse recovery time (150 ns). Operating temperature range -55°C to 150°C. ROHS3 compliant, MSL 1.
RS1AHE3_A/H (Vishay General Semiconductor - Diodes Division): Active status, DO-214AC (SMA) package, 50 V / 1 A rating, automotive grade with AEC-Q101 qualification. Higher forward voltage (1.3 V @ 1 A) and longer reverse recovery time (150 ns). Operating temperature range -55°C to 150°C. ROHS3 compliant, MSL 1.

Obsolete Alternatives (Not Recommended):

GF1A (onsemi): Not For New Designs status. Standard recovery speed (2 µs trr). Avoid for new applications.

Frequently Asked Questions (FAQ)

Q: Can MURA105T3G replace ES1A-LTP in all applications?

A: MURA105T3G is rated for 2 A average rectified current versus 1 A for ES1A-LTP. This higher current rating provides design margin and is functionally compatible. Both parts share identical 50 V reverse voltage rating, DO-214AC (SMA) package, fast recovery characteristics, and operating temperature range (-65°C to 175°C). MURA105T3G is suitable for direct substitution.

Q: What is the difference between DO-214AC (SMA) and DO-214BA (GF1) packages?

A: Both are surface mount packages for rectifier diodes. DO-214AC (SMA) and DO-214BA (GF1) have different physical dimensions and land patterns. Parts in DO-214BA package (EGF1A-E3/5CA, EGF1A-E3/67A) require PCB layout modification and cannot be used as drop-in replacements without redesign. Use DO-214AC (SMA) package substitutes for direct compatibility.

Q: Why is ES1A-LTP marked "Not For New Designs"?

A: This designation indicates the part has reached end-of-life status and is no longer recommended for new product development. Existing inventory remains available for legacy system support. For new designs, select from active status alternatives such as ES1A-13-F, ES1A (YAGEO), or MURA105T3G.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this document are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of ES1A-LTP.

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

A: Reverse recovery time affects switching speed and switching losses in rectifier applications. ES1A-LTP has 35 ns trr (fast recovery). Substitutes with shorter trr (ES1A-13-F at 25 ns, MURA105T3G at 30 ns) provide improved switching performance. Substitutes with longer trr (GF1A at 2 µs, RS1A-M3/61T at 150 ns) are acceptable for lower-frequency applications but may increase switching losses in high-frequency circuits.

Q: Can I use RS1AHE3_A/H as a general replacement?

A: RS1AHE3_A/H is automotive-grade with AEC-Q101 qualification, suitable for automotive applications. However, it has higher forward voltage (1.3 V @ 1 A) and longer reverse recovery time (150 ns) compared to ES1A-LTP. Operating temperature range is narrower (-55°C to 150°C). Use only if automotive qualification is required or if circuit design accommodates higher forward voltage drop.

Q: What inventory considerations should guide part selection?

A: ES1A (YAGEO) has the highest inventory availability at 80,200 pcs. ES1A-13-F (Diodes Incorporated) has 70,300 pcs. MURA105T3G (onsemi) has 10,200 pcs. For high-volume production, ES1A or ES1A-13-F provide supply security. MURA105T3G offers superior electrical characteristics (2 A rating, lower forward voltage) with adequate inventory for most applications.

Q: Are there any temperature range limitations I should consider?

A: ES1A-LTP operates from -65°C to 175°C. Most recommended substitutes (ES1A-13-F, ES1A, MURA105T3G, EGF1A variants) match this range. CGRA4001-G, RS1A-M3/61T, and RS1AHE3_A/H have narrower range (-55°C to 150°C). For applications requiring full -65°C to 175°C operation, select from ES1A-13-F, ES1A, MURA105T3G, or Vishay EGF1A parts.

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