GS1B-TP Equivalent & Substitute Parts

Part Overview

The GS1B-TP 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 surface mount DO-214AC (HSMA) package. This part is discontinued at DiGi Electronics, necessitating identification of equivalent alternatives that maintain electrical and mechanical compatibility for new procurement and design continuity.

Key Parameters

Parameter	Value
Voltage - DC Reverse (Vr) (Max)	100 V
Current - Average Rectified (Io)	1 A
Voltage - Forward (Vf) (Max) @ If	1.1 V @ 1 A
Speed	Standard Recovery >500ns, > 200mA (Io)
Current - Reverse Leakage @ Vr	10 µA @ 100 V
Mounting Type	Surface Mount
Package / Case	DO-214AC, SMA
Operating Temperature - Junction	-55°C ~ 150°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the GS1B-TP is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 100 V
Current - Average Rectified (Io): 1 A
Mounting Type: Surface Mount
Package / Case: DO-214AC or compatible SMA variants
RoHS Status: ROHS3 Compliant

Acceptable Variation Parameters:

Voltage - Forward (Vf) (Max) @ If: Up to 1.3 V @ 1 A (GS1B-TP specifies 1.1 V maximum)
Speed: Standard or Fast Recovery acceptable (GS1B-TP specifies Standard Recovery >500ns)
Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 100 V
Operating Temperature - Junction: Minimum -55°C, Maximum 150°C or higher

Substitute parts are grouped into two categories: Direct Equivalents (identical package and electrical characteristics) and Similar Equivalents (same electrical ratings with package or recovery speed variations).

Parameter Comparison

Part Number	Manufacturer	Vr (Max)	Io	Vf (Max) @ If	Speed	Package	Temp Range	Product Status
GS1B-TP	Micro Commercial Co	100 V	1 A	1.1 V @ 1 A	Standard >500ns	DO-214AC (HSMA)	-55°C ~ 150°C	Discontinued
GS1B-LTP	Micro Commercial Co	100 V	1 A	1 V @ 1 A	Standard >500ns	DO-214AC (SMA)	-55°C ~ 150°C	Not For New Designs
CEFM102-G	Comchip Technology	100 V	1 A	875 mV @ 1 A	Fast ≤500ns	SOD-123T	-55°C ~ 150°C	Active
CFRA102-G	Comchip Technology	100 V	1 A	1.3 V @ 1 A	Fast ≤500ns	DO-214AC (SMA)	-55°C ~ 150°C	Active
CGRA4002-G	Comchip Technology	100 V	1 A	1.1 V @ 1 A	Fast ≤500ns	DO-214AC (SMA)	-55°C ~ 150°C	Active
CSFA102-G	Comchip Technology	100 V	1 A	950 mV @ 1 A	Fast ≤500ns	DO-214AC (SMA)	-55°C ~ 150°C	Active
EGF1B-E3/5CA	Vishay General Semiconductor	100 V	1 A	1 V @ 1 A	Fast ≤500ns	DO-214BA (GF1)	-65°C ~ 175°C	Active
EGF1B-E3/67A	Vishay General Semiconductor	100 V	1 A	1 V @ 1 A	Fast ≤500ns	DO-214BA (GF1)	-65°C ~ 175°C	Not For New Designs
ES1B-13-F	Diodes Incorporated	100 V	1 A	920 mV @ 1 A	Fast ≤500ns	DO-214AC (SMA)	-55°C ~ 150°C	Active
ES1B-E3/5AT	Vishay General Semiconductor	100 V	1 A	920 mV @ 1 A	Fast ≤500ns	DO-214AC (SMA)	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Primary Recommendation - Direct Package Equivalent:

CGRA4002-G (Comchip Technology) is the preferred substitute for GS1B-TP. This part maintains identical electrical specifications (100 V, 1 A, 1.1 V forward voltage) and package format (DO-214AC SMA), with the advantage of Active product status and improved recovery characteristics (Fast Recovery ≤500ns versus Standard Recovery >500ns). Full RoHS3 compliance and unlimited moisture sensitivity level ensure manufacturing continuity.

Secondary Recommendations - Active Status with Acceptable Variations:

ES1B-13-F (Diodes Incorporated) and ES1B-E3/5AT (Vishay General Semiconductor) provide Active alternatives with lower forward voltage (920 mV @ 1 A) and faster recovery times (25 ns and 25 ns respectively). Both maintain DO-214AC SMA packaging and -55°C to 150°C operating range. These parts are suitable where improved efficiency from reduced forward voltage is beneficial.

CSFA102-G (Comchip Technology) offers the lowest forward voltage (950 mV @ 1 A) with Active status and DO-214AC SMA packaging, providing enhanced thermal performance in power-sensitive applications.

Alternative Package Consideration:

EGF1B-E3/5CA (Vishay General Semiconductor) provides Active status with extended operating temperature range (-65°C to 175°C) and DO-214BA package. This part is suitable for applications requiring wider temperature margins, though PCB layout modifications may be necessary due to package geometry differences.

Parts to Avoid for New Designs:

GS1B-LTP, EGF1B-E3/67A, and any parts marked "Not For New Designs" or "Discontinued" should not be selected for new product development.

Frequently Asked Questions (FAQ)

Q: Can CEFM102-G replace GS1B-TP directly?

A: CEFM102-G is electrically equivalent (100 V, 1 A) but uses SOD-123T package instead of DO-214AC SMA. This requires PCB layout redesign and is not a direct mechanical substitute. Use only if board redesign is acceptable.

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

A: DO-214AC (SMA) and DO-214BA (GF1) are different surface mount package geometries. While electrically equivalent parts may be available in both packages, physical footprints differ. Verify PCB compatibility before substitution.

Q: Why do some substitutes have lower forward voltage than GS1B-TP?

A: Lower forward voltage (920 mV to 950 mV versus 1.1 V) indicates improved diode technology with faster recovery characteristics. These parts reduce power dissipation and heat generation while maintaining all electrical ratings. They are direct functional improvements.

Q: Is GS1B-LTP a suitable substitute for GS1B-TP?

A: GS1B-LTP is electrically compatible but marked "Not For New Designs." While available in inventory, it should not be selected for new product development. Use Active-status alternatives instead.

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

A: Recovery speed indicates how quickly the diode transitions from conducting to blocking state. Fast Recovery (≤500ns) provides improved switching characteristics and reduced switching losses compared to Standard Recovery (>500ns). Both are acceptable for general-purpose rectification; Fast Recovery offers performance advantages.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts maintain ROHS3 Compliant status, ensuring compatibility with environmental and regulatory requirements equivalent to GS1B-TP.

Q: Can I use EGF1B-E3/5CA in a circuit designed for GS1B-TP?

A: EGF1B-E3/5CA is electrically equivalent but uses DO-214BA package instead of DO-214AC. Electrical substitution is valid, but physical PCB footprint differs. Verify board layout compatibility before implementation.

Q: Which substitute offers the best availability?

A: EGF1B-E3/67A (Vishay) has the highest inventory (30,200 pcs), followed by EGF1B-E3/5CA (15,300 pcs). However, EGF1B-E3/67A is marked "Not For New Designs." For new designs, CGRA4002-G (957 pcs) and CSFA102-G (723 pcs) provide Active status with adequate stock levels.

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