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CSFA104-G General Purpose Rectifier Diode 400V 1A DO-214AC Equivalent & Substitute Parts
Part Overview
The CSFA104-G is a general purpose rectifier diode manufactured by Comchip Technology, rated for 400V DC reverse voltage and 1A average rectified current in a surface mount DO-214AC (SMA) package. This part is currently Active in product status with full RoHS3 compliance and unlimited moisture sensitivity level (MSL 1).
Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across the specified parameter set. The CSFA104-G operates within a junction temperature range of -55°C to 150°C with fast recovery characteristics (≤500ns) and a reverse recovery time of 35ns, making it suitable for general rectification applications requiring rapid switching performance.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - DC Reverse (Vr) Maximum | 400 | V |
| Current - Average Rectified (Io) | 1 | A |
| Voltage - Forward (Vf) Maximum @ If | 1.25 | V @ 1A |
| Speed Classification | Fast Recovery ≤500ns, >200mA | - |
| Reverse Recovery Time (trr) | 35 | ns |
| Current - Reverse Leakage @ Vr | 5 | µA @ 400V |
| Package / Case | DO-214AC, SMA | - |
| Mounting Type | Surface Mount | - |
| Operating Temperature - Junction | -55 to 150 | °C |
| RoHS Status | ROHS3 Compliant | - |
| Moisture Sensitivity Level | 1 (Unlimited) | - |
Substitute Part Grouping Explanation
Substitute parts for the CSFA104-G are classified based on strict electrical and mechanical parameter equivalence. The primary substitution criteria are:
Critical Parameters for Substitution:
- Voltage - DC Reverse (Vr) Maximum: 400V
- Current - Average Rectified (Io): 1A
- Package / Case: DO-214AC (SMA) or mechanically compatible alternative
- Mounting Type: Surface Mount
- RoHS3 Compliance: Required
- Moisture Sensitivity Level: MSL 1
Secondary Consideration Parameters:
- Voltage - Forward (Vf) Maximum @ If: 1.0V to 1.25V acceptable range
- Speed Classification: Fast Recovery (≤500ns) or Standard Recovery (>500ns)
- Reverse Recovery Time (trr): 35ns to 2µs acceptable range
- Current - Reverse Leakage @ Vr: 5µA to 10µA acceptable range
- Operating Temperature - Junction: -55°C minimum, 150°C to 175°C maximum
Substitute parts are grouped into two categories: Parametric Equivalents (matching fast recovery characteristics) and MFR Recommended alternatives (including standard recovery options with extended temperature ranges or alternative package formats).
Parameter Comparison
| Part Number | Manufacturer | Vr (Max) V | Io (A) | Vf (Max) @ 1A (V) | Speed | trr (ns) | Ir @ 400V (µA) | Package | Temp Range (°C) | Product Status |
|---|---|---|---|---|---|---|---|---|---|---|
| CSFA104-G | Comchip Technology | 400 | 1 | 1.25 | Fast Recovery ≤500ns | 35 | 5 | DO-214AC (SMA) | -55 to 150 | Active |
| ES1G-HF | Comchip Technology | 400 | 1 | 1.25 | Fast Recovery ≤500ns | 35 | 5 | DO-214AC (SMA) | -55 to 150 | Active |
| ES1G-LTP | Micro Commercial Co | 400 | 1 | 1.25 | Fast Recovery ≤500ns | 35 | 5 | DO-214AC (SMA) | -65 to 175 | Active |
| GF1G | onsemi | 400 | 1 | 1.0 | Standard Recovery >500ns | 2000 | 5 | DO-214AC (SMA) | -65 to 175 | Not For New Designs |
| GF1G-E3/5CA | Vishay General Semiconductor | 400 | 1 | 1.1 | Standard Recovery >500ns | 2000 | 5 | DO-214BA (GF1) | -65 to 175 | Active |
| GF1G-E3/67A | Vishay General Semiconductor | 400 | 1 | 1.1 | Standard Recovery >500ns | 2000 | 5 | DO-214BA (GF1) | -65 to 175 | Active |
| GS1G-LTP | Micro Commercial Co | 400 | 1 | 1.0 | Standard Recovery >500ns | Not specified | 10 | DO-214AC (SMA) | -55 to 150 | Not For New Designs |
| GS1GE-TP | Micro Commercial Co | 400 | 1 | 1.1 | Standard Recovery >500ns | Not specified | 5 | DO-214AC (SMA) | -55 to 150 | Not For New Designs |
| MRA4004T3G | onsemi | 400 | 1 | 1.1 | Standard Recovery >500ns | Not specified | 10 | DO-214AC (SMA) | -55 to 175 | Not For New Designs |
| NRVA4004T3G | onsemi | 400 | 1 | 1.1 | Standard Recovery >500ns | Not specified | 10 | DO-214AC (SMA) | -55 to 175 | Not For New Designs |
| RGF1G | onsemi | 400 | 1 | 1.3 | Fast Recovery ≤500ns | 150 | 5 | DO-214AC (SMA) | -65 to 175 | Not For New Designs |
Engineering Selection Recommendations
For Active Product Status with Current Availability:
ES1G-HF (Comchip Technology) is the primary parametric equivalent, offering identical electrical specifications to the CSFA104-G with fast recovery characteristics (35ns trr), matching forward voltage (1.25V @ 1A), and identical reverse leakage current (5µA @ 400V). Both parts maintain the same operating temperature range (-55°C to 150°C) and package format (DO-214AC SMA). This part is Active in product status with 4636 pieces in stock.
ES1G-LTP (Micro Commercial Co) provides an alternative with extended operating temperature range (-65°C to 175°C) while maintaining fast recovery performance and identical electrical parameters. This part is Active in product status with 13565 pieces in stock and is available in Cut Tape (CT) & Digi-Reel® packaging.
For Extended Temperature Range Applications:
GF1G-E3/5CA and GF1G-E3/67A (Vishay General Semiconductor SUPERECTIFIER® series) are Active products offering -65°C to 175°C operating range with standard recovery characteristics. These parts use DO-214BA package format (mechanically compatible with DO-214AC in most applications) and are suitable when extended temperature performance is required. Forward voltage is slightly lower (1.1V @ 1A) compared to CSFA104-G.
For Automotive Applications:
NRVA4004T3G (onsemi) is qualified to AEC-Q101 automotive standard with -55°C to 175°C operating range. This part is suitable for automotive-grade applications requiring standard recovery characteristics and extended upper temperature limit.
Parts Not Recommended for New Designs:
GF1G, GS1G-LTP, GS1GE-TP, MRA4004T3G, and RGF1G are marked "Not For New Designs" and should be used only for replacement or legacy system support. These parts remain available in inventory but are not recommended for new circuit development.
Frequently Asked Questions (FAQ)
Q: Can ES1G-HF directly replace CSFA104-G without circuit modification?
A: Yes. ES1G-HF is a parametric equivalent with identical voltage rating (400V), current rating (1A), forward voltage (1.25V @ 1A), reverse recovery time (35ns), and package format (DO-214AC SMA). Both parts are Active in product status and RoHS3 compliant. No circuit modification is required.
Q: What is the difference between fast recovery and standard recovery diodes in this comparison?
A: Fast recovery diodes (CSFA104-G, ES1G-HF, ES1G-LTP, RGF1G) have reverse recovery time ≤500ns, enabling faster switching and reduced switching losses in high-frequency applications. Standard recovery diodes (GF1G, GF1G-E3/5CA, GF1G-E3/67A, GS1G-LTP, GS1GE-TP, MRA4004T3G, NRVA4004T3G) have reverse recovery time >500ns (typically 2µs) and are suitable for lower-frequency rectification where switching speed is less critical.
Q: Can I use a DO-214BA package part (GF1G-E3/5CA, GF1G-E3/67A) as a substitute for DO-214AC?
A: DO-214BA and DO-214AC are different package formats. While both are surface mount packages with similar footprints, they are not mechanically identical. Substitution requires verification that the PCB layout and solder pad dimensions accommodate the alternative package. Consult package datasheets for precise dimensional compatibility.
Q: Why do some substitute parts have higher reverse leakage current (10µA vs 5µA)?
A: Reverse leakage current variation within the 5µA to 10µA range is acceptable for general purpose rectification applications. Higher leakage current (10µA) does not affect functionality in standard rectifier circuits but may be significant in precision analog applications requiring minimal leakage. CSFA104-G specifies 5µA maximum leakage.
Q: Is NRVA4004T3G suitable for automotive applications?
A: Yes. NRVA4004T3G is qualified to AEC-Q101 automotive standard and carries automotive-grade designation. This part is suitable for automotive applications requiring standard recovery characteristics and extended temperature range (-55°C to 175°C).
Q: What is the inventory status for immediate availability?
A: ES1G-LTP has the highest inventory (13565 pieces), followed by GS1GE-TP (26646 pieces), MRA4004T3G (155400 pieces), and RGF1G (74767 pieces). CSFA104-G has 626 pieces in stock. Verify current inventory with your supplier before design finalization.
Q: Can I substitute CSFA104-G with MRA4004T3G for cost reduction?
A: MRA4004T3G is marked "Not For New Designs" and has different electrical characteristics (1.1V forward voltage vs 1.25V, standard recovery vs fast recovery, 10µA leakage vs 5µA). While electrically compatible for basic rectification, this substitution is not recommended for new designs. Use ES1G-HF or ES1G-LTP instead.
Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?
A: Tape & Reel (TR) packaging provides continuous reel format suitable for high-volume automated assembly. Cut Tape (CT) & Digi-Reel® provides smaller quantities on cut tape or alternative reel formats for lower-volume production or prototyping. Both formats contain identical components; packaging format selection depends on production volume and assembly equipment compatibility.
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