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CEFA104-G Equivalent & Substitute Parts
Part Overview
The CEFA104-G is a superfast recovery rectifier diode manufactured by Comchip Technology, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing production and maintenance applications.
The CEFA104-G features a fast recovery time of 35 nanoseconds, suitable for applications requiring rapid switching characteristics. Equivalent parts must maintain the same voltage and current ratings while accommodating variations in recovery speed, forward voltage, and package configuration within acceptable engineering tolerances.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - DC Reverse (Vr) (Max) | 400 | V |
| Current - Average Rectified (Io) | 1 | A |
| Voltage - Forward (Vf) (Max) @ If | 1.25 | V @ 1 A |
| Reverse Recovery Time (trr) | 35 | ns |
| Current - Reverse Leakage @ Vr | 5 | µA @ 400 V |
| Speed Classification | Fast Recovery ≤ 500ns, > 200mA (Io) | — |
| 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 CEFA104-G is determined by the following critical parameters:
Mandatory Matching Parameters:
- Voltage - DC Reverse (Vr): 400 V minimum
- Current - Average Rectified (Io): 1 A minimum
- Mounting Type: Surface Mount
- Package compatibility: DO-214AC (SMA) or DO-214BA (GF1) footprints
Allowable Variations:
- Reverse Recovery Time (trr): Substitute parts may have faster recovery (25 ns) or standard recovery (>500 ns) characteristics, provided the application circuit tolerates the difference
- Forward Voltage (Vf): Substitute parts rated at 1.0 V to 1.25 V @ 1 A are acceptable
- Reverse Leakage Current: Substitute parts rated at 5 µA to 10 µA @ 400 V are acceptable
- Operating Temperature Range: Substitute parts with extended temperature ranges (-65°C to 175°C) are acceptable
Package Considerations:
- DO-214AC (SMA) packages are direct mechanical and electrical equivalents
- DO-214BA (GF1) packages require PCB footprint verification but are electrically compatible
Substitute parts are grouped into three categories based on recovery speed and product status:
- Fast Recovery Active Parts (trr ≤ 500 ns): ES1G-13-F, ES1G-LTP, ES2GA
- Standard Recovery Active Parts (trr > 500 ns): CMR1-04M TR13 PBFREE, GF1G-E3/5CA, GF1G-E3/67A
- Standard Recovery Obsolete/Not For New Designs (trr > 500 ns): GF1G, GS1G-LTP, GS1GE-TP, MRA4004T3G
Parameter Comparison
| Part Number | Manufacturer | Vr (Max) V | Io (A) | Vf (Max) @ If (V) | trr (ns) | Ir @ Vr (µA) | Package | Product Status |
|---|---|---|---|---|---|---|---|---|
| CEFA104-G | Comchip Technology | 400 | 1 | 1.25 @ 1A | 35 | 5 @ 400V | DO-214AC (SMA) | Obsolete |
| ES1G-13-F | Diodes Incorporated | 400 | 1 | 1.25 @ 1A | 25 | 5 @ 400V | DO-214AC (SMA) | Active |
| ES1G-LTP | Micro Commercial Co | 400 | 1 | 1.25 @ 1A | 35 | 5 @ 400V | DO-214AC (SMA) | Active |
| CMR1-04M TR13 PBFREE | Central Semiconductor Corp | 400 | 1 | 1.1 @ 1A | >500 | 5 @ 400V | DO-214AC (SMA) | Active |
| ES2GA | SURGE | 400 | 2 | 1.25 @ 2A | 25 | 5 @ 400V | DO-214AC (SMA) | Active |
| GF1G | onsemi | 400 | 1 | 1.0 @ 1A | >500 | 5 @ 400V | DO-214AC (SMA) | Not For New Designs |
| GF1G-E3/5CA | Vishay General Semiconductor | 400 | 1 | 1.1 @ 1A | >500 | 5 @ 400V | DO-214BA (GF1) | Active |
| GF1G-E3/67A | Vishay General Semiconductor | 400 | 1 | 1.1 @ 1A | >500 | 5 @ 400V | DO-214BA (GF1) | Active |
| GS1G-LTP | Micro Commercial Co | 400 | 1 | 1.0 @ 1A | >500 | 10 @ 400V | DO-214AC (SMA) | Not For New Designs |
| GS1GE-TP | Micro Commercial Co | 400 | 1 | 1.1 @ 1A | >500 | 5 @ 400V | DO-214AC (SMA) | Not For New Designs |
| MRA4004T3G | onsemi | 400 | 1 | 1.1 @ 1A | >500 | 10 @ 400V | DO-214AC (SMA) | Not For New Designs |
Engineering Selection Recommendations
For New Designs and Active Production:
Select from parts with Active product status:
- ES1G-13-F (Diodes Incorporated): Fastest recovery time (25 ns), matching forward voltage (1.25 V @ 1 A), DO-214AC (SMA) package. ROHS3 compliant. Recommended for applications requiring fast switching performance equivalent to CEFA104-G.
- ES1G-LTP (Micro Commercial Co): Identical recovery time (35 ns) and forward voltage (1.25 V @ 1 A) to CEFA104-G, DO-214AC (SMA) package. ROHS3 compliant. Direct functional equivalent.
- CMR1-04M TR13 PBFREE (Central Semiconductor Corp): Standard recovery (>500 ns), lower forward voltage (1.1 V @ 1 A), DO-214AC (SMA) package. ROHS3 compliant. Suitable for applications where recovery speed is not critical.
- GF1G-E3/5CA and GF1G-E3/67A (Vishay General Semiconductor): Standard recovery (>500 ns), lower forward voltage (1.1 V @ 1 A), DO-214BA (GF1) package. ROHS3 compliant. Requires PCB footprint compatibility verification.
For Maintenance and Repair of Existing Equipment:
Parts marked "Not For New Designs" remain available for replacement in legacy systems:
- GF1G, GS1G-LTP, GS1GE-TP, MRA4004T3G are suitable for direct replacement in existing circuits where the CEFA104-G was originally specified.
Current Rating Consideration:
- ES2GA (SURGE) is rated for 2 A average rectified current. This part is suitable only for applications where the 2 A rating does not create thermal or circuit design conflicts. Use only if the application circuit is designed to accommodate higher current capacity.
Frequently Asked Questions (FAQ)
Q: Can ES1G-13-F directly replace CEFA104-G?
A: Yes. ES1G-13-F matches the critical parameters: 400 V reverse voltage, 1 A average rectified current, 1.25 V forward voltage @ 1 A, and DO-214AC (SMA) package. The faster recovery time (25 ns vs. 35 ns) is a performance improvement. ROHS3 compliance and active product status make this the preferred substitute.
Q: What is the difference between fast recovery and standard recovery diodes?
A: Recovery time (trr) is the interval required for a diode to transition from conducting to blocking state. CEFA104-G has fast recovery (35 ns). Substitute parts with standard recovery (>500 ns) require longer switching intervals. In high-frequency switching applications, standard recovery diodes may introduce additional switching losses. Verify circuit performance if substituting with standard recovery parts.
Q: Can I use GF1G-E3/5CA or GF1G-E3/67A as replacements?
A: Electrically, yes. Both parts meet the 400 V, 1 A requirements with acceptable forward voltage (1.1 V @ 1 A). However, these parts use DO-214BA (GF1) package instead of DO-214AC (SMA). Verify that your PCB footprint accommodates DO-214BA before substitution. The packages have different mechanical dimensions.
Q: Why is ES2GA listed as a substitute if it is rated for 2 A?
A: ES2GA maintains 400 V reverse voltage and uses the same DO-214AC (SMA) package. The 2 A rating is a superset of the 1 A requirement. This part is suitable only if your circuit design and thermal management accommodate the higher current rating without adverse effects. Do not use in current-limited applications where 1 A is the design specification.
Q: What does "Not For New Designs" mean?
A: Parts marked "Not For New Designs" (GF1G, GS1G-LTP, GS1GE-TP, MRA4004T3G) are available for replacement in existing equipment but should not be selected for new product development. These parts remain in inventory for legacy system support. For new designs, select from Active status parts.
Q: Are all substitute parts ROHS3 compliant?
A: All listed substitute parts with Active status are ROHS3 compliant. Parts marked "Not For New Designs" are also ROHS3 compliant. REACH compliance is consistent across all parts (REACH Unaffected or Vendor Undefined). Verify specific compliance requirements for your application region.
Q: What is the significance of Moisture Sensitivity Level (MSL) 1?
A: MSL 1 (Unlimited) indicates that the component has no moisture sensitivity restrictions. Storage and handling do not require special humidity control. All listed parts carry MSL 1 rating, matching CEFA104-G.
Q: Can I substitute based on forward voltage alone?
A: No. Forward voltage is one parameter among several. All substitute parts must meet the 400 V reverse voltage and 1 A current requirements. Forward voltage variations (1.0 V to 1.25 V @ 1 A) are acceptable within the design margin of most rectifier circuits, but this parameter alone does not determine substitutability.
Q: What is the difference between ES1G-13-F and ES1G-LTP?
A: Both are manufactured by Diodes Incorporated and Micro Commercial Co respectively. ES1G-13-F has faster recovery (25 ns) and is packaged in Cut Tape. ES1G-LTP has recovery time matching CEFA104-G (35 ns) and is packaged in Cut Tape & Digi-Reel. Both use DO-214AC (SMA) package and are Active status. Select based on packaging requirements and recovery speed preference.
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