GS1G-LTP Equivalent & Substitute Parts

Part Overview

The GS1G-LTP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This device is classified as "Not For New Designs," indicating it is an obsolete or legacy component. Identifying equivalent and substitute parts is necessary to support existing designs, facilitate production continuity, and enable migration to active product alternatives where applicable.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	400	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1 V @ 1 A	V
Speed Classification	Standard Recovery >500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	10	µA @ 400 V
Capacitance @ Vr, F	15	pF @ 4V, 1MHz
Mounting Type	Surface Mount	—
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 GS1G-LTP is determined by strict electrical and mechanical compatibility. The following parameters must be met or exceeded in substitute parts:

Mandatory Electrical Parameters:

Voltage - DC Reverse (Vr) (Max): 400 V minimum
Current - Average Rectified (Io): 1 A minimum
Mounting Type: Surface Mount
Package / Case: DO-214AC (SMA) or compatible surface mount package

Acceptable Variations:

Forward voltage (Vf) may vary within typical rectifier specifications
Recovery speed classification may differ (Standard or Fast Recovery acceptable)
Reverse leakage current may be lower than the main part
Operating temperature range may be wider or narrower
Capacitance values may vary

Substitute parts are grouped into two categories:

Direct Electrical Equivalents (DO-214AC/SMA Package): Parts meeting all electrical specifications with identical or compatible package footprints. These include 1SR156-400TE25, CFRA104-G, CSFA104-G, CURA104-G, ES1G, ES1G-13-F, and GF1G.

Functional Equivalents (Alternative Surface Mount Packages): Parts meeting electrical specifications but in different surface mount packages. CEFM104-G uses SOD-123T package, which differs mechanically from DO-214AC but maintains electrical compatibility for applications where package size is not a constraint.

Legacy/Obsolete Status Consideration: GF1G-E3/5CA uses DO-214BA package and is listed as an active product, providing a path for designs requiring continued support beyond the GS1G-LTP lifecycle.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ If [V]	Speed Classification	Reverse Leakage @ Vr [µA]	Package	Temp Range [°C]	Product Status
GS1G-LTP	Micro Commercial Co	400	1	1 @ 1 A	Standard Recovery >500ns	10 @ 400 V	DO-214AC (SMA)	-55 to 150	Not For New Designs
1SR156-400TE25	Rohm Semiconductor	400	1	1.3 @ 800 mA	Fast Recovery ≤ 500ns	10 @ 400 V	DO-214AC (SMA)	—	Not For New Designs
CEFM104-G	Comchip Technology	400	1	1.25 @ 1 A	Fast Recovery ≤ 500ns	5 @ 400 V	SOD-123T	-55 to 150	Active
CFRA104-G	Comchip Technology	400	1	1.3 @ 1 A	Fast Recovery ≤ 500ns	5 @ 400 V	DO-214AC (SMA)	—	Active
CSFA104-G	Comchip Technology	400	1	1.25 @ 1 A	Fast Recovery ≤ 500ns	5 @ 400 V	DO-214AC (SMA)	-55 to 150	Active
CURA104-G	Comchip Technology	400	1	1.3 @ 1 A	Fast Recovery ≤ 500ns	5 @ 400 V	DO-214AC (SMA)	—	Active
ES1G	Good-Ark Semiconductor	400	1	1.3 @ 1 A	Fast Recovery ≤ 500ns	5 @ 400 V	DO-214AC (SMA)	-55 to 125	Active
ES1G-13-F	Diodes Incorporated	400	1	1.25 @ 1 A	Fast Recovery ≤ 500ns	5 @ 400 V	DO-214AC (SMA)	-55 to 150	Active
GF1G	onsemi	400	1	1 @ 1 A	Standard Recovery >500ns	5 @ 400 V	DO-214AC (SMA)	-65 to 175	Not For New Designs
GF1G-E3/5CA	Vishay General Semiconductor	400	1	1.1 @ 1 A	Standard Recovery >500ns	5 @ 400 V	DO-214BA	-65 to 175	Active
S1B	YAGEO	—	—	—	—	—	DO-214AC	—	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Package and Footprint):

Select from CFRA104-G, CSFA104-G, CURA104-G, ES1G, or ES1G-13-F when the GS1G-LTP must be replaced with no PCB layout modifications. All these parts are rated for 400 V, 1 A, and use the DO-214AC (SMA) package. CSFA104-G and ES1G-13-F provide the widest operating temperature range (-55°C to 150°C), matching the GS1G-LTP specification. All listed substitutes are ROHS3 compliant and carry MSL 1 (Unlimited) rating.

For Active Product Status Priority:

CSFA104-G, CURA104-G, ES1G, ES1G-13-F, and GF1G-E3/5CA are all classified as Active products, ensuring long-term availability and supply chain stability. GF1G-E3/5CA is recommended for designs where extended operating temperature range (-65°C to 175°C) is beneficial, though it requires DO-214BA package accommodation.

For Legacy Design Support:

1SR156-400TE25 and GF1G are listed as "Not For New Designs" but remain available for existing production. These parts maintain electrical compatibility with the GS1G-LTP for designs already in production.

For Thermal Performance Consideration:

ES1G, CFRA104-G, CSFA104-G, and CURA104-G feature lower reverse leakage current (5 µA vs. 10 µA) and faster recovery times, resulting in reduced power dissipation compared to the GS1G-LTP.

For Package Flexibility:

CEFM104-G provides electrical equivalence in SOD-123T package for applications where smaller footprint is advantageous, though PCB layout modification is required.

All substitute parts carry identical compliance certifications: ROHS3 Compliant, MSL 1 (Unlimited), REACH Unaffected, and ECCN EAR99.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct drop-in replacement for the GS1G-LTP?

A: CFRA104-G, CSFA104-G, CURA104-G, ES1G, and ES1G-13-F are direct drop-in replacements. All use the DO-214AC (SMA) package with identical footprint and pinout. CEFM104-G and GF1G-E3/5CA require PCB layout modifications due to different package types (SOD-123T and DO-214BA, respectively).

Q: What is the difference between Standard Recovery and Fast Recovery classifications?

A: The GS1G-LTP uses Standard Recovery (>500 ns), while most substitute parts use Fast Recovery (≤500 ns). Fast Recovery diodes exhibit shorter reverse recovery time, resulting in lower switching losses and reduced electromagnetic interference. Both classifications are electrically compatible for 400 V, 1 A applications; the choice depends on circuit switching frequency and thermal management requirements.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts are ROHS3 Compliant with MSL 1 (Unlimited) rating, matching the GS1G-LTP specification. All carry REACH Unaffected and ECCN EAR99 classifications.

Q: Why is the GS1G-LTP marked "Not For New Designs"?

A: This designation indicates the part is obsolete or in end-of-life status. Micro Commercial Co no longer recommends this part for new circuit designs. For new designs, select from Active status parts: CSFA104-G, CURA104-G, ES1G, ES1G-13-F, or GF1G-E3/5CA.

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

A: Both are surface mount packages for rectifier diodes. DO-214AC (SMA) and DO-214BA (GF1) have different physical dimensions and footprints. GF1G-E3/5CA uses DO-214BA and requires PCB layout modification if replacing a DO-214AC part. Verify package compatibility with your PCB design before substitution.

Q: Can I substitute the GS1G-LTP with S1B?

A: S1B is listed as an Active product from YAGEO in DO-214AC package. However, detailed electrical specifications (Vr, Io, Vf, speed classification) are not provided in the available data. Verify S1B specifications against your application requirements before selection.

Q: Which substitute part has the lowest reverse leakage current?

A: CEFM104-G, CFRA104-G, CSFA104-G, CURA104-G, ES1G, ES1G-13-F, GF1G, and GF1G-E3/5CA all specify 5 µA reverse leakage at 400 V, compared to 10 µA for the GS1G-LTP. This lower leakage reduces standby power consumption.

Q: What is the maximum operating temperature for each substitute?

A: GS1G-LTP, CEFM104-G, CSFA104-G, and ES1G-13-F support -55°C to 150°C. ES1G supports -55°C to 125°C. GF1G and GF1G-E3/5CA support -65°C to 175°C. Select based on your application's thermal environment.

Q: Are there inventory considerations for these substitute parts?

A: ES1G (Good-Ark Semiconductor) has the highest inventory at 415,300 pieces. ES1G-13-F (Diodes Incorporated) has 420,300 pieces. GF1G-E3/5CA (Vishay) has 15,100 pieces. CFRA104-G has 1,045 pieces. Verify current availability with your supplier before design commitment.

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