CEFA102-G Equivalent & Substitute Parts Reference

Part Overview

The CEFA102-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 100V DC reverse voltage and 1A average rectified current in a DO-214AC (SMA) surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications. The diode features fast recovery characteristics with a reverse recovery time of 25 nanoseconds, suitable for standard rectification circuits requiring moderate switching speeds.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	100	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	920 mV @ 1 A	mV
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	25	ns
Current - Reverse Leakage @ Vr	5 µA @ 50 V	µA
Mounting Type	Surface Mount	—
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction (Max)	150	°C
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CEFA102-G is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 100V
Current - Average Rectified (Io): 1A
Mounting Type: Surface Mount
Package / Case: DO-214AC (SMA) or DO-214BA (GF1) variants

Secondary Compatibility Parameters:

Voltage - Forward (Vf) (Max) @ If: 920 mV to 1.1 V @ 1 A (acceptable range for general-purpose rectification)
Speed Classification: Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns) depending on circuit requirements
Reverse Recovery Time (trr): 25 ns to 2 µs (application-dependent tolerance)
Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 100 V (acceptable for general-purpose applications)

Substitute parts are grouped into two categories based on recovery speed characteristics: Fast Recovery diodes (trr ≤ 500ns) and Standard Recovery diodes (trr > 500ns). Both categories maintain the core electrical ratings of 100V/1A and surface mount packaging, ensuring mechanical and electrical compatibility with the original CEFA102-G footprint and circuit function.

Parameter Comparison

Part Number	Manufacturer	Vr (Max) [V]	Io [A]	Vf (Max) @ 1A [mV]	Speed	trr [ns]	Ir @ Vr [µA]	Package	Status
CEFA102-G	Comchip Technology	100	1	920	Fast Recovery ≤ 500ns	25	5 @ 50V	DO-214AC (SMA)	Obsolete
ES1B-13-F	Diodes Incorporated	100	1	920	Fast Recovery ≤ 500ns	25	5 @ 100V	DO-214AC (SMA)	Active
EGF1B	Fairchild Semiconductor	100	1	1000	Fast Recovery ≤ 500ns	50	10 @ 100V	DO-214AC (SMA)	Active
EGF1B-E3/5CA	Vishay General Semiconductor - Diodes Division	100	1	1000	Fast Recovery ≤ 500ns	50	5 @ 100V	DO-214BA (GF1)	Active
EGF1B-E3/67A	Vishay General Semiconductor - Diodes Division	100	1	1000	Fast Recovery ≤ 500ns	50	5 @ 100V	DO-214BA (GF1)	Not For New Designs
ES1B	YAGEO	100	1	950	Fast Recovery ≤ 500ns	—	—	DO-214AC (SMA)	Active
ES1B-LTP	Micro Commercial Co	100	1	950	Fast Recovery ≤ 500ns	35	5 @ 100V	DO-214AC (SMA)	Not For New Designs
GF1B	onsemi	100	1	1000	Standard Recovery > 500ns	2000	5 @ 100V	DO-214AC (SMA)	Not For New Designs
GF1B-E3/5CA	Vishay General Semiconductor - Diodes Division	100	1	1100	Standard Recovery > 500ns	2000	5 @ 100V	DO-214BA (GF1)	Active
GF1B-E3/67A	Vishay General Semiconductor - Diodes Division	100	1	1100	Standard Recovery > 500ns	2000	5 @ 100V	DO-214BA (GF1)	Not For New Designs
GS1B-LTP	Micro Commercial Co	100	1	1000	Standard Recovery > 500ns	—	10 @ 100V	DO-214AC (SMA)	Not For New Designs

Engineering Selection Recommendations

Primary Recommendation for Active Production:

ES1B-13-F (Diodes Incorporated) is the preferred direct substitute for CEFA102-G. This part maintains identical electrical specifications including 100V reverse voltage, 1A average rectified current, 920 mV forward voltage drop at 1A, and 25 nanosecond reverse recovery time. The part is in Active product status with ROHS3 compliance and unlimited moisture sensitivity rating. Packaging is DO-214AC (SMA), providing direct mechanical compatibility.

Secondary Recommendations:

EGF1B-E3/5CA (Vishay General Semiconductor - Diodes Division) is an Active alternative with equivalent 100V/1A ratings. This part uses DO-214BA (GF1) packaging instead of DO-214AC (SMA), requiring PCB layout verification for footprint compatibility. Forward voltage is 1000 mV at 1A (80 mV higher than CEFA102-G), and reverse recovery time is 50 nanoseconds (25 ns longer). ROHS3 compliance and unlimited MSL rating are provided.

GF1B-E3/5CA (Vishay General Semiconductor - Diodes Division) is an Active option with 100V/1A ratings and DO-214BA (GF1) packaging. This part features Standard Recovery characteristics (2 µs reverse recovery time) compared to the Fast Recovery specification of CEFA102-G. Forward voltage is 1100 mV at 1A. Selection of this part requires confirmation that circuit design tolerates slower switching speeds.

Parts to Avoid for New Designs:

EGF1B-E3/67A, ES1B-LTP, GF1B, GF1B-E3/67A, and GS1B-LTP are marked as "Not For New Designs" and should not be selected for new production applications, although they remain available for legacy system maintenance.

Frequently Asked Questions (FAQ)

Q: Can ES1B-13-F directly replace CEFA102-G without PCB modification?

A: Yes. ES1B-13-F maintains identical electrical specifications (100V, 1A, 920 mV Vf, 25 ns trr) and uses the same DO-214AC (SMA) package. No PCB layout changes are required.

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

A: Both are surface mount packages for 1A rectifier diodes. DO-214AC (SMA) and DO-214BA (GF1) have different physical dimensions and land patterns. PCB footprints are not interchangeable without design modification. Verify your PCB layout supports the selected package before substitution.

Q: Why do some substitute parts have higher forward voltage (1000 mV or 1100 mV) compared to CEFA102-G (920 mV)?

A: Forward voltage variation within the 100V/1A rectifier diode category is normal and depends on semiconductor manufacturing process and die design. Differences of 80–180 mV are acceptable for general-purpose rectification circuits. Verify that your circuit design accommodates the higher voltage drop if selecting EGF1B, GF1B-E3/5CA, or GF1B-E3/67A.

Q: What does "Fast Recovery ≤ 500ns" versus "Standard Recovery > 500ns" mean for circuit performance?

A: Fast Recovery diodes (trr ≤ 500ns) switch off more quickly, reducing reverse current spikes and switching losses. Standard Recovery diodes (trr > 500ns) are slower but typically have lower forward voltage. For CEFA102-G replacement, Fast Recovery parts (ES1B-13-F, EGF1B, EGF1B-E3/5CA) maintain the original switching speed. Standard Recovery alternatives (GF1B-E3/5CA, GF1B-E3/67A, GS1B-LTP) are suitable only if circuit design permits slower switching.

Q: Is ROHS3 compliance required for my application?

A: All listed substitute parts carry ROHS3 compliance certification. If your application requires ROHS3 compliance, all recommended substitutes are acceptable. Verify compliance requirements with your procurement or quality department.

Q: Can I use GF1B or GS1B-LTP for new designs?

A: No. GF1B and GS1B-LTP are marked "Not For New Designs." These parts are available only for legacy system maintenance and repair. For new production, select from Active status parts: ES1B-13-F, EGF1B, EGF1B-E3/5CA, ES1B, or GF1B-E3/5CA.

Q: What is the significance of reverse leakage current (Ir) differences between parts?

A: Reverse leakage current ranges from 5 µA to 10 µA across the substitute list. These differences are negligible for general-purpose rectification. Leakage current becomes significant only in precision analog circuits or high-impedance applications. For standard power supply and rectification circuits, all listed parts are equivalent.

Q: Does packaging affect electrical performance?

A: No. DO-214AC (SMA) and DO-214BA (GF1) packages are functionally equivalent for electrical performance. Package selection is determined by PCB layout and assembly equipment compatibility. Electrical specifications remain identical regardless of package type.

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