CSFA105-G Equivalent & Substitute Parts Reference

Part Overview

The CSFA105-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 600 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as Active product status and is RoHS3 compliant. Substitute parts are identified based on matching electrical specifications (voltage, current, recovery characteristics) and compatible package configurations to ensure functional equivalence in circuit applications.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	600	V
Current - Average Rectified (Io)	1	A
Voltage - Forward (Vf) (Max) @ If	1.5 V @ 1 A	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	35	ns
Current - Reverse Leakage @ Vr	5	µA @ 600 V
Package / Case	DO-214AC, SMA	—
Operating Temperature - Junction	-55°C ~ 150°C	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the CSFA105-G are grouped based on the following substitution criteria:

Primary Matching Parameters:

Voltage - DC Reverse (Vr): 600 V (exact match required)
Current - Average Rectified (Io): 1 A (exact match required)
Package / Case: DO-214AC (SMA) or DO-214BA (GF1) (mechanically compatible)
Mounting Type: Surface Mount (required)
RoHS Status: ROHS3 Compliant (required)

Secondary Compatibility Parameters:

Voltage - Forward (Vf) @ 1 A: ≤ 1.7 V (acceptable range for general-purpose rectification)
Speed Classification: Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns) (application-dependent)
Reverse Recovery Time (trr): 35 ns to 2 µs (acceptable range)
Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 600 V (acceptable range)
Operating Temperature - Junction: -55°C to 175°C (acceptable range)

Parts are considered equivalent when all primary matching parameters align and secondary parameters fall within acceptable operational ranges for general-purpose rectifier applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vr (Max) V	Io (A)	Vf (Max) @ 1A (V)	Speed	trr (ns)	Ir @ 600V (µA)	Package	Temp Range (°C)	Product Status
CSFA105-G	Comchip Technology	600	1	1.5	Fast Recovery ≤ 500ns	35	5	DO-214AC (SMA)	-55 ~ 150	Active
ES1J-LTP	Micro Commercial Co	600	1	1.7	Fast Recovery ≤ 500ns	35	5	DO-214AC (SMA)	-65 ~ 175	Active
GF1J	onsemi	600	1	1.0	Standard Recovery > 500ns	2000	5	DO-214AC (SMA)	-65 ~ 175	Not For New Designs
GF1J-E3/67A	Vishay General Semiconductor - Diodes Division	600	1	1.1	Standard Recovery > 500ns	2000	5	DO-214BA (GF1)	-65 ~ 175	Active
GS1J-LTP	Micro Commercial Co	600	1	1.0	Standard Recovery > 500ns	—	10	DO-214AC (SMA)	-55 ~ 150	Active
MRA4005T1G	onsemi	600	1	1.1	Standard Recovery > 500ns	—	10	DO-214AC (SMA)	-55 ~ 175	Not For New Designs
MRA4005T3G	onsemi	600	1	1.1	Standard Recovery > 500ns	—	10	DO-214AC (SMA)	-55 ~ 175	Not For New Designs
RGF1J-E3/5CA	Vishay General Semiconductor - Diodes Division	600	1	1.3	Fast Recovery ≤ 500ns	250	5	DO-214BA (GF1)	-65 ~ 175	Active
RGF1J-E3/67A	Vishay General Semiconductor - Diodes Division	600	1	1.3	Fast Recovery ≤ 500ns	250	5	DO-214BA (GF1)	-65 ~ 175	Active
RS1J	Taiwan Semiconductor Corporation	600	1	1.3	Fast Recovery ≤ 500ns	250	5	DO-214AC (SMA)	-55 ~ 150	Active
RS1J-13-F	Diodes Incorporated	600	1	1.3	Fast Recovery ≤ 500ns	250	5	DO-214AC (SMA)	-65 ~ 150	Active

Engineering Selection Recommendations

For Active Product Status Applications:

ES1J-LTP (Micro Commercial Co) is the primary recommended substitute. It maintains identical electrical specifications to CSFA105-G (600 V, 1 A, Fast Recovery ≤ 500ns, 35 ns trr, 5 µA reverse leakage) with DO-214AC (SMA) package compatibility. Extended operating temperature range (-65°C ~ 175°C) provides broader thermal margin. High inventory availability (55,300 pcs) ensures supply continuity.

RS1J (Taiwan Semiconductor Corporation) and RS1J-13-F (Diodes Incorporated) are secondary alternatives. Both maintain Fast Recovery characteristics (250 ns trr) with 1.3 V forward voltage and 5 µA reverse leakage. RS1J-13-F offers extended lower temperature rating (-65°C) compared to CSFA105-G (-55°C).

RGF1J-E3/5CA and RGF1J-E3/67A (Vishay General Semiconductor - Diodes Division) provide Fast Recovery performance with DO-214BA (GF1) package. These parts require mechanical footprint verification due to package transition from DO-214AC to DO-214BA.

For New Design Considerations:

GF1J-E3/67A (Vishay General Semiconductor - Diodes Division) is Active status with Standard Recovery characteristics and DO-214BA package. Suitable for applications where recovery speed is not critical.

Parts to Avoid for New Designs:

GF1J, MRA4005T1G, and MRA4005T3G carry "Not For New Designs" product status and should not be selected for new circuit development.

Frequently Asked Questions (FAQ)

Q: Can ES1J-LTP directly replace CSFA105-G without circuit modification?

A: Yes. ES1J-LTP matches all primary electrical parameters (600 V, 1 A, Fast Recovery ≤ 500ns, 35 ns trr) and uses identical DO-214AC (SMA) package. Forward voltage difference (1.7 V vs. 1.5 V) is within acceptable tolerance for general-purpose rectification circuits.

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

A: Both are surface mount packages for 1 A rectifier diodes. DO-214AC (SMA) and DO-214BA (GF1) have different physical dimensions and PCB footprints. Mechanical compatibility must be verified before substitution. RGF1J-E3/5CA and RGF1J-E3/67A use DO-214BA package and require footprint redesign if replacing DO-214AC parts.

Q: Why do some substitute parts have higher reverse recovery time (trr)?

A: Reverse recovery time indicates switching speed. CSFA105-G specifies 35 ns (Fast Recovery). GF1J and GS1J-LTP specify 2000 ns (Standard Recovery). Standard Recovery parts are suitable for low-frequency rectification but may generate additional switching losses in high-frequency applications. Application frequency requirements determine acceptable trr range.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry RoHS3 Compliant status, matching CSFA105-G compliance requirement.

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

A: Parts marked "Not For New Designs" (GF1J, MRA4005T1G, MRA4005T3G) are in mature or declining lifecycle phases. Manufacturers may discontinue these parts. New circuit designs should select Active status parts: ES1J-LTP, RS1J, RS1J-13-F, RGF1J-E3/5CA, RGF1J-E3/67A, or GF1J-E3/67A.

Q: How does operating temperature range affect part selection?

A: CSFA105-G operates -55°C ~ 150°C. Substitute parts offer extended ranges: ES1J-LTP (-65°C ~ 175°C), RS1J-13-F (-65°C ~ 150°C). Extended range provides design margin for thermal stress conditions but does not alter electrical performance within specified junction temperature limits.

Q: Can I use GS1J-LTP as a direct substitute?

A: GS1J-LTP is electrically compatible (600 V, 1 A, DO-214AC package) but has higher reverse leakage (10 µA vs. 5 µA) and Standard Recovery characteristics (> 500ns vs. ≤ 500ns). Suitable for low-frequency applications where leakage current and switching speed are not critical. Verify application requirements before selection.

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