GS1B-LTP Equivalent & Substitute Parts

Part Overview

The GS1B-LTP is a general-purpose rectifier diode manufactured by Micro Commercial Co, rated for 100 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 This component is classified as "Not For New Designs," indicating it has been superseded in the manufacturer's product line. Equivalent and substitute parts are necessary for applications requiring continued supply, design updates, or performance optimization while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	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 @ 100 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

Substitute parts for the GS1B-LTP are selected based on strict electrical and mechanical compatibility criteria. The primary substitution parameters are:

Electrical Compatibility:

Voltage - DC Reverse (Vr) (Max): 100 V minimum
Current - Average Rectified (Io): 1 A minimum
Voltage - Forward (Vf) (Max) @ If: Must not exceed application requirements
Operating Temperature - Junction: Must encompass -55°C to 150°C range or higher

Mechanical Compatibility:

Package / Case: DO-214AC (SMA) or DO-214BA (GF1) for direct PCB footprint compatibility
Mounting Type: Surface Mount
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Substitute parts are grouped into two categories:

Category 1: Direct Package Match (DO-214AC/SMA) Parts with identical DO-214AC (SMA) packaging enable direct board-level substitution without layout modifications.

Category 2: Compatible Package Variant (DO-214BA/GF1) Parts with DO-214BA (GF1) packaging share the same electrical specifications and similar footprint characteristics, suitable for applications where package variant compatibility is acceptable.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [V]	Speed	Package	Tj Range [°C]	Product Status
GS1B-LTP	Micro Commercial Co	100	1	1.0	Standard >500ns	DO-214AC	-55 to 150	Not For New Designs
CEFM102-G	Comchip Technology	100	1	0.875	Fast ≤500ns	SOD-123T	-55 to 150	Active
CFRA102-G	Comchip Technology	100	1	1.3	Fast ≤500ns	DO-214AC	-55 to 150	Active
CGRA4002-G	Comchip Technology	100	1	1.1	Fast ≤500ns	DO-214AC	-55 to 150	Active
CSFA102-G	Comchip Technology	100	1	0.95	Fast ≤500ns	DO-214AC	-55 to 150	Active
EGF1B	Fairchild Semiconductor	100	1	1.0	Fast ≤500ns	DO-214AC	-65 to 175	Active
EGF1B-E3/5CA	Vishay General Semiconductor	100	1	1.0	Fast ≤500ns	DO-214BA	-65 to 175	Active
EGF1B-E3/67A	Vishay General Semiconductor	100	1	1.0	Fast ≤500ns	DO-214BA	-65 to 175	Not For New Designs
ES1B-13-F	Diodes Incorporated	100	1	0.92	Fast ≤500ns	DO-214AC	-55 to 150	Active
ES1B-E3/5AT	Vishay General Semiconductor	100	1	0.92	Fast ≤500ns	DO-214AC	-55 to 150	Active

Engineering Selection Recommendations

For Direct Replacement (DO-214AC Package, Active Status):

CFRA102-G, CGRA4002-G, CSFA102-G, ES1B-13-F, and ES1B-E3/5AT are all active production parts with DO-214AC (SMA) packaging, providing direct board-level compatibility with GS1B-LTP. All are ROHS3 compliant with MSL 1 (Unlimited) rating. These parts feature fast recovery characteristics (≤500ns) compared to the GS1B-LTP standard recovery specification, offering improved switching performance in rectification applications.

For Enhanced Temperature Range (DO-214AC Package, Active Status):

EGF1B provides identical electrical specifications to GS1B-LTP with extended operating temperature range (-65°C to 175°C) and active product status. This part is suitable for applications requiring wider thermal operating margins while maintaining DO-214AC package compatibility.

For Compatible Package Variant (DO-214BA Package, Active Status):

EGF1B-E3/5CA offers active product status with identical electrical specifications and extended temperature range (-65°C to 175°C). The DO-214BA (GF1) package is mechanically compatible with DO-214AC applications where package variant acceptance is established in design documentation.

Compliance Considerations:

All recommended substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage processes. REACH status is unaffected for all listed parts.

Frequently Asked Questions (FAQ)

Q: Can CEFM102-G substitute for GS1B-LTP in a DO-214AC footprint?

A: CEFM102-G uses SOD-123T packaging, which differs from the GS1B-LTP DO-214AC (SMA) package. While electrical specifications are compatible, the different package geometry requires PCB layout modification. Direct footprint substitution is not possible.

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

A: DO-214AC (SMA) and DO-214BA (GF1) are distinct surface mount packages with different physical dimensions and land patterns. While both are used for 1 A rectifier diodes, they require different PCB footprints. Substitution between these packages requires design review and layout verification.

Q: Why do some substitute parts have lower forward voltage (Vf) than GS1B-LTP?

A: Forward voltage variation within the 100 V, 1 A rectifier diode category reflects different semiconductor manufacturing processes and die designs. Lower Vf values (such as 0.875 V in CEFM102-G or 0.92 V in ES1B-13-F) indicate improved efficiency characteristics. Substitution is valid provided the application circuit accommodates the lower voltage drop.

Q: Is EGF1B-E3/67A suitable for new designs?

A: EGF1B-E3/67A carries "Not For New Designs" status, identical to GS1B-LTP. While electrically compatible, this part is not recommended for new product development. EGF1B-E3/5CA (active status) is the preferred Vishay equivalent for new designs.

Q: What does "Fast Recovery ≤500ns" mean compared to "Standard Recovery >500ns"?

A: Recovery time describes how quickly the diode transitions from conducting to blocking state. Fast recovery (≤500ns) enables faster switching transitions, reducing switching losses in high-frequency applications. Standard recovery (>500ns) is suitable for lower-frequency rectification. Most substitute parts feature fast recovery, providing performance improvement over GS1B-LTP.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, ensuring compatibility with RoHS-regulated manufacturing environments and end-use applications.

Q: Can I use ES1B-E3/5AT as a direct replacement without design changes?

A: ES1B-E3/5AT matches GS1B-LTP in DO-214AC packaging, electrical ratings (100 V, 1 A), and operating temperature range (-55°C to 150°C). Direct PCB substitution is possible. The lower forward voltage (0.92 V vs. 1.0 V) and faster recovery time (25 ns vs. >500ns) represent performance improvements compatible with standard rectification circuits.

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