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CSFA102-G Equivalent & Substitute Parts Reference
Part Overview
The CSFA102-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 100V DC reverse voltage and 1A average rectified current in a surface mount DO-214AC (SMA) package. This diode is classified as Active product status and is ROHS3 compliant with unlimited moisture sensitivity level (MSL 1).
Substitute parts are identified when equivalent electrical ratings and mechanical compatibility are maintained across the specified parameters: reverse voltage (Vr), average rectified current (Io), forward voltage (Vf), recovery speed characteristics, reverse recovery time (trr), reverse leakage current, and package type. Alternative sources become necessary for supply chain continuity, inventory availability, or design flexibility.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - DC Reverse (Vr) (Max) | 100 | V |
| Current - Average Rectified (Io) | 1 | A |
| Voltage - Forward (Vf) (Max) @ If | 950 mV @ 1 A | mV |
| Speed | Fast Recovery ≤ 500ns, > 200mA (Io) | — |
| Reverse Recovery Time (trr) | 35 | ns |
| Current - Reverse Leakage @ Vr | 5 | µA @ 100 V |
| Package / Case | DO-214AC, SMA | — |
| Operating Temperature - Junction (Max) | 150 | °C |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution logic for the CSFA102-G is based on strict electrical and mechanical parameter matching:
Primary Substitution Criteria:
- Voltage - DC Reverse (Vr) (Max): Must equal or exceed 100V
- Current - Average Rectified (Io): Must equal or exceed 1A
- Package / Case: Must be compatible surface mount package (DO-214AC/SMA or DO-214BA/GF1)
- Mounting Type: Surface Mount required
- RoHS Status: ROHS3 Compliant
- Moisture Sensitivity Level: MSL 1 (Unlimited)
Secondary Compatibility Parameters:
- Voltage - Forward (Vf) (Max) @ If: Acceptable range 920 mV to 1.1 V @ 1 A
- Reverse Recovery Time (trr): Fast Recovery (≤500ns) or Standard Recovery (>500ns) variants acceptable
- Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 100 V acceptable
- Operating Temperature - Junction: Minimum -55°C to maximum 150°C or higher
Substitute parts are grouped into two categories: Fast Recovery variants (trr ≤ 500ns) and Standard Recovery variants (trr > 500ns). Fast Recovery variants maintain closer electrical performance to the CSFA102-G. Standard Recovery variants are electrically compatible but exhibit different switching characteristics.
Parameter Comparison
| Part Number | Manufacturer | Vr (Max) V | Io (A) | Vf (Max) @ 1A (mV) | Speed | trr (ns) | Ir @ Vr (µA) | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| CSFA102-G | Comchip Technology | 100 | 1 | 950 | Fast Recovery ≤ 500ns | 35 | 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 | 100 | 1 | 1000 | Fast Recovery ≤ 500ns | 50 | 5 @ 100V | DO-214BA (GF1) | Active |
| EGF1B-E3/67A | Vishay General Semiconductor | 100 | 1 | 1000 | Fast Recovery ≤ 500ns | 50 | 5 @ 100V | DO-214BA (GF1) | Not For New Designs |
| ES1B | YAGEO | 100 | 1 | 950 | — | — | — | DO-214AC (SMA) | Active |
| ES1B-13-F | Diodes Incorporated | 100 | 1 | 920 | Fast Recovery ≤ 500ns | 25 | 5 @ 100V | 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 | 100 | 1 | 1100 | Standard Recovery >500ns | 2000 | 5 @ 100V | DO-214BA (GF1) | Active |
| GF1B-E3/67A | Vishay General Semiconductor | 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
Tier 1 - Preferred Active Substitutes (Recommended for New Designs):
ES1B-13-F (Diodes Incorporated) is the primary recommended substitute. It maintains Active product status, ROHS3 compliance, and MSL 1 rating. Electrical parameters are within specification with 920 mV forward voltage and 25 ns reverse recovery time, both superior to the CSFA102-G. Package compatibility is confirmed as DO-214AC (SMA). Operating temperature range extends to -55°C to 150°C.
EGF1B-E3/5CA (Vishay General Semiconductor) is an alternative Active substitute with identical voltage and current ratings. Fast Recovery speed classification (≤500ns, 50ns trr) ensures switching performance compatibility. Package variant is DO-214BA (GF1), which is mechanically compatible with DO-214AC applications. ROHS3 compliant with MSL 1.
ES1B (YAGEO) is an Active substitute with matching forward voltage (950 mV) and package type (DO-214AC/SMA). Complete electrical specifications are not provided in the input data; verification of recovery speed and reverse leakage current is required before selection.
Tier 2 - Active Substitutes with Package Variation:
GF1B-E3/5CA (Vishay General Semiconductor) is Active status but uses DO-214BA (GF1) package instead of DO-214AC (SMA). Standard Recovery classification (>500ns, 2µs trr) indicates slower switching characteristics than the CSFA102-G. Forward voltage is 1.1V, which is within acceptable range. Suitable for applications where switching speed is not critical.
Tier 3 - Not For New Designs (Legacy Substitutes):
EGF1B-E3/67A, GF1B, ES1B-LTP, GF1B-E3/67A, and GS1B-LTP are classified as "Not For New Designs" and should not be selected for new circuit development. These parts are retained in the reference for legacy system maintenance and repair only.
Compliance Verification:
All listed substitutes maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity level, matching the CSFA102-G environmental certifications. REACH Status is "REACH Unaffected" across all parts. ECCN classification is EAR99 for all parts.
Frequently Asked Questions (FAQ)
Q: Can I substitute ES1B-13-F directly for CSFA102-G in my circuit?
A: Yes. ES1B-13-F meets all primary electrical requirements: 100V reverse voltage, 1A average rectified current, DO-214AC (SMA) package compatibility, and Active product status. Forward voltage is 920 mV (lower than CSFA102-G at 950 mV), which is acceptable. Reverse recovery time is 25 ns, which is faster than the CSFA102-G at 35 ns. No circuit modification is 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) are mechanically compatible in most PCB layouts, though pad dimensions may differ slightly. Verify PCB footprint compatibility with your design before substituting parts with different package designations. Consult component datasheets for precise pad geometry.
Q: Why are some substitutes marked "Not For New Designs"?
A: Parts marked "Not For New Designs" are legacy components that manufacturers have discontinued or are phasing out. These parts remain available for existing product support and repair but should not be used in new circuit designs. Select Active status parts (EGF1B-E3/5CA, ES1B-13-F, GF1B-E3/5CA, ES1B) for new designs.
Q: What is the significance of "Fast Recovery" versus "Standard Recovery" speed classification?
A: Fast Recovery diodes (trr ≤ 500ns) switch off more quickly than Standard Recovery diodes (trr > 500ns). The CSFA102-G is Fast Recovery with 35 ns trr. Fast Recovery variants like ES1B-13-F (25 ns) and EGF1B-E3/5CA (50 ns) are electrically compatible. Standard Recovery variants like GF1B (2µs trr) have significantly slower switching and should only be substituted if the application does not require fast switching performance.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, matching the CSFA102-G environmental certifications. This ensures compatibility with modern manufacturing processes and environmental regulations.
Q: What inventory availability should I consider when selecting a substitute?
A: Inventory levels are provided for reference only and do not determine substitution eligibility. Selection should be based on electrical compatibility, product status, and compliance certifications. Consult your supplier for current stock levels and lead times.
Q: Can I use GF1B-E3/5CA as a substitute if my application requires fast switching?
A: No. GF1B-E3/5CA is classified as Standard Recovery with 2µs reverse recovery time, compared to the CSFA102-G Fast Recovery at 35 ns. This 57-fold difference in switching speed makes it unsuitable for applications requiring fast diode turn-off. Use ES1B-13-F or EGF1B-E3/5CA instead.
Q: What is the maximum junction temperature difference between CSFA102-G and its substitutes?
A: The CSFA102-G specifies maximum junction temperature of 150°C. Most substitutes extend to -65°C to 175°C or -55°C to 150°C. Verify your application's thermal requirements against the selected substitute's operating temperature range. Higher temperature ratings provide additional thermal margin but do not affect substitution eligibility if your circuit operates within 150°C maximum.
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