GS1A-LTP Equivalent & Substitute Parts

Part Overview

The GS1A-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 component is classified as "Not For New Designs," indicating it has reached end-of-life status. Identifying equivalent and substitute parts is necessary to support existing designs, facilitate production continuity, and enable migration to active product lines where applicable.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	50	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1	V @ 1 A
Speed	Standard Recovery >500ns, > 200mA (Io)	-
Current - Reverse Leakage @ Vr	10	µA @ 50 V
Capacitance @ Vr, F	15	pF @ 4V, 1MHz
Package / Case	DO-214AC, SMA	-
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	-
Moisture Sensitivity Level (MSL)	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the GS1A-LTP is determined by the following critical parameters:

Electrical Compatibility Requirements:

Voltage - DC Reverse (Vr) (Max): Must equal or exceed 50 V
Current - Average Rectified (Io): Must equal or exceed 1 A
Voltage - Forward (Vf) (Max) @ If: Must not exceed 1 V @ 1 A for direct replacement
Operating Temperature - Junction: Must support -55°C to 150°C minimum range

Mechanical Compatibility Requirements:

Package / Case: DO-214AC (SMA) for direct pin-compatible substitution
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitution Categories:

Direct Equivalents (Identical Package - DO-214AC): Parts that maintain the same DO-214AC package footprint and meet all electrical parameters within specified limits.

Package Variants (Alternative Surface Mount Packages): Parts that meet electrical requirements but use different surface mount packages (DO-214BA, SOD-123), requiring PCB layout modification.

Performance Upgrades: Parts with improved recovery characteristics (Fast Recovery ≤500ns vs. Standard Recovery >500ns) that provide enhanced performance while maintaining electrical compatibility.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [V]	Speed	Package	Tj (°C)	Product Status
GS1A-LTP	Micro Commercial Co	50	1	1.0	Standard >500ns	DO-214AC	-55 to 150	Not For New Designs
US1A-E3/5AT	Vishay General Semiconductor	50	1	1.0	Fast ≤500ns	DO-214AC	-55 to 150	Active
CFRA101-G	Comchip Technology	50	1	1.3	Fast ≤500ns	DO-214AC	-55 to 150	Active
EGF1A-E3/5CA	Vishay General Semiconductor	50	1	1.0	Fast ≤500ns	DO-214BA	-65 to 175	Active
EGF1A-E3/67A	Vishay General Semiconductor	50	1	1.0	Fast ≤500ns	DO-214BA	-65 to 175	Active
ES1A-13-F	Diodes Incorporated	50	1	0.92	Fast ≤500ns	DO-214AC	-55 to 150	Active
ES1A-E3/61T	Vishay General Semiconductor	50	1	0.92	Fast ≤500ns	DO-214AC	-55 to 150	Active
CEFM101-G	Comchip Technology	50	1	0.875	Fast ≤500ns	SOD-123T	-55 to 150	Active
GF1A	onsemi	50	1	1.0	Standard >500ns	DO-214AC	-65 to 175	Not For New Designs
GF1A-E3/67A	Vishay General Semiconductor	50	50	1.1	Standard >500ns	DO-214BA	-65 to 175	Active

Engineering Selection Recommendations

For Direct Replacement (Same Package, Same Performance Characteristics):

Select US1A-E3/5AT (Vishay General Semiconductor) when maintaining DO-214AC package compatibility is required. This part is Active status, meets all electrical parameters of the GS1A-LTP, and provides improved recovery characteristics (Fast Recovery ≤500ns). It is ROHS3 compliant with MSL 1 rating.

Select ES1A-13-F (Diodes Incorporated) or ES1A-E3/61T (Vishay General Semiconductor) as alternative DO-214AC options. Both are Active status with Fast Recovery characteristics and forward voltage of 0.92 V @ 1 A, providing margin below the 1 V maximum specification.

For DO-214AC Package with Acceptable Forward Voltage Variation:

Select CFRA101-G (Comchip Technology) when forward voltage of 1.3 V @ 1 A is acceptable within circuit design margins. This part is Active status and maintains DO-214AC package compatibility.

For Package Migration (DO-214BA Alternative):

Select EGF1A-E3/5CA or EGF1A-E3/67A (Vishay General Semiconductor, SUPERECTIFIER® series) when PCB layout modification to accommodate DO-214BA package is feasible. Both parts are Active status with extended operating temperature range (-65°C to 175°C) and Fast Recovery characteristics. These parts provide superior performance and are suitable for new designs.

For Compact Package Migration (SOD-123):

Select CEFM101-G (Comchip Technology) when space constraints permit migration to SOD-123T package. This part is Active status with Fast Recovery characteristics and lowest forward voltage (0.875 V @ 1 A).

For Legacy Compatibility (Standard Recovery Characteristics):

Select GF1A (onsemi) only when Standard Recovery characteristics matching the GS1A-LTP are required. This part is Not For New Designs status and should not be selected for new circuit development.

All recommended substitutes are ROHS3 compliant with MSL 1 rating, matching the compliance profile of the GS1A-LTP.

Frequently Asked Questions (FAQ)

Q: Can US1A-E3/5AT be used as a direct replacement for GS1A-LTP?

A: Yes. US1A-E3/5AT maintains identical DO-214AC package footprint, meets all electrical specifications (50 V, 1 A, 1 V forward voltage maximum), and is Active status. The Fast Recovery characteristic (≤500ns) provides improved performance compared to the GS1A-LTP Standard Recovery (>500ns).

Q: What is the difference between DO-214AC and DO-214BA packages?

A: DO-214AC (SMA) and DO-214BA (GF1) are both surface mount packages for rectifier diodes but have different physical dimensions and PCB footprints. DO-214BA is larger than DO-214AC. Migration between these packages requires PCB layout modification.

Q: Can CEFM101-G replace GS1A-LTP without PCB changes?

A: No. CEFM101-G uses SOD-123T package, which has a different footprint than DO-214AC. PCB layout modification is required. However, CEFM101-G meets all electrical requirements and offers improved forward voltage (0.875 V @ 1 A).

Q: Why do some substitutes have lower forward voltage than GS1A-LTP?

A: Forward voltage variation is a normal characteristic of rectifier diodes from different manufacturers and process technologies. Lower forward voltage (0.875 V to 0.92 V vs. 1.0 V) indicates improved efficiency and reduced power dissipation. These parts remain fully compatible as long as forward voltage does not exceed the 1 V maximum specification.

Q: What does "Not For New Designs" status mean?

A: "Not For New Designs" indicates the part has reached end-of-life and is no longer recommended for new circuit development. Existing inventory may be available, but long-term supply is not guaranteed. Active status parts are recommended for new designs.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) rating, matching the compliance profile of the GS1A-LTP.

Q: What is the significance of Fast Recovery vs. Standard Recovery?

A: Fast Recovery (≤500ns) indicates shorter reverse recovery time, resulting in reduced switching losses and improved efficiency in high-frequency applications. Standard Recovery (>500ns) is suitable for lower-frequency applications. Both are electrically compatible with the GS1A-LTP specification.

Q: Can CFRA101-G be used if forward voltage is 1.3 V instead of 1.0 V?

A: CFRA101-G can be used only if circuit design margins accommodate the higher forward voltage (1.3 V @ 1 A). This represents a 0.3 V increase compared to GS1A-LTP and may affect voltage regulation, power dissipation, and thermal performance. Circuit validation is required before selection.

Q: Which substitute offers the widest operating temperature range?

A: EGF1A-E3/5CA, EGF1A-E3/67A, GF1A, and GF1A-E3/67A all support -65°C to 175°C operating temperature range, compared to GS1A-LTP at -55°C to 150°C. This extended range provides additional design margin for extreme temperature environments.

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