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CEFA101-G Equivalent & Substitute Parts Reference
Part Overview
The CEFA101-G is a general-purpose rectifier diode manufactured by Comchip Technology, rated for 50 V DC reverse voltage and 1 A average rectified current in a DO-214AC (SMA) surface mount package. This component is classified as obsolete, indicating discontinued production and limited availability. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production requirements for applications utilizing this diode specification.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - DC Reverse (Vr) (Max) | 50 | 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 |
| 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
Substitute parts for the CEFA101-G are qualified based on the following critical electrical and mechanical parameters:
Primary Substitution Criteria:
- Voltage - DC Reverse (Vr) (Max): 50 V minimum
- Current - Average Rectified (Io): 1 A minimum
- Mounting Type: Surface Mount
- Package compatibility: DO-214AC (SMA) or DO-214BA (GF1) footprints
Secondary Compatibility Factors:
- Voltage - Forward (Vf) (Max) @ If: 920 mV to 1.3 V @ 1 A (acceptable range for general-purpose rectification)
- Speed Classification: Fast Recovery (≤ 500ns) or Standard Recovery (> 500ns) depending on application switching requirements
- Reverse Recovery Time (trr): 25 ns to 2 µs (performance variation acceptable for non-critical switching applications)
- Current - Reverse Leakage @ Vr: 5 µA to 10 µA @ 50 V (within acceptable leakage tolerance)
- Operating Temperature Range: -55°C to 175°C (encompasses original -55°C to 150°C specification)
Substitute parts are grouped into two categories: Direct Electrical Equivalents (matching fast recovery characteristics and forward voltage) and Functional Equivalents (meeting voltage and current ratings with acceptable performance variations).
Parameter Comparison
| Manufacturer Part Number | Manufacturer | Vr (Max) [V] | Io [A] | Vf (Max) @ 1A [mV] | Speed | trr [ns] | Ir @ 50V [µA] | Package | Product Status |
|---|---|---|---|---|---|---|---|---|---|
| CEFA101-G | Comchip Technology | 50 | 1 | 920 | Fast Recovery ≤ 500ns | 25 | 5 | DO-214AC (SMA) | Obsolete |
| ES1A-13-F | Diodes Incorporated | 50 | 1 | 920 | Fast Recovery ≤ 500ns | 25 | 5 | DO-214AC (SMA) | Active |
| EGF1A | Fairchild Semiconductor | 50 | 1 | 1000 | Fast Recovery ≤ 500ns | 50 | 10 | DO-214AC (SMA) | Active |
| EGF1A-E3/67A | Vishay General Semiconductor - Diodes Division | 50 | 1 | 1000 | Fast Recovery ≤ 500ns | 50 | 5 | DO-214BA (GF1) | Active |
| ES1A | YAGEO | 50 | 1 | 950 | — | — | — | DO-214AC (SMA) | Active |
| ES1A-LTP | Micro Commercial Co | 50 | 1 | 950 | Fast Recovery ≤ 500ns | 35 | 5 | DO-214AC (SMA) | Not For New Designs |
| GF1A | onsemi | 50 | 1 | 1000 | Standard Recovery > 500ns | 2000 | 5 | DO-214AC (SMA) | Not For New Designs |
| GF1A-E3/67A | Vishay General Semiconductor - Diodes Division | 50 | 1 | 1100 | Standard Recovery > 500ns | 2000 | 5 | DO-214BA (GF1) | Active |
| GS1A-LTP | Micro Commercial Co | 50 | 1 | 1000 | Standard Recovery > 500ns | — | 10 | DO-214AC (SMA) | Not For New Designs |
| RGF1A | Fairchild Semiconductor | 50 | 1 | 1300 | Fast Recovery ≤ 500ns | 150 | 5 | DO-214AC (SMA) | Active |
| RGF1A-E3/67A | Vishay General Semiconductor - Diodes Division | 50 | 1 | 1300 | Fast Recovery ≤ 500ns | 150 | 5 | DO-214BA (GF1) | Active |
Engineering Selection Recommendations
Tier 1 - Direct Electrical Equivalents (Recommended for Replacement):
ES1A-13-F (Diodes Incorporated) is the primary recommended substitute. This part maintains identical electrical specifications to CEFA101-G: 50 V reverse voltage, 1 A average rectified current, 920 mV forward voltage drop at 1 A, fast recovery ≤ 500ns, and 25 ns reverse recovery time. The part is in active production status with high inventory availability (70,300 pcs), carries ROHS3 compliance, and is packaged in standard DO-214AC (SMA) format compatible with existing PCB layouts.
Tier 2 - Functional Equivalents with Minor Performance Variations (Acceptable for Most Applications):
EGF1A-E3/67A (Vishay General Semiconductor - Diodes Division) and ES1A-LTP (Micro Commercial Co) meet all voltage and current requirements with acceptable forward voltage variations (1000 mV and 950 mV respectively). EGF1A-E3/67A is in active production with ROHS3 compliance. ES1A-LTP is marked "Not For New Designs" but remains available for legacy system support.
Tier 3 - Functional Equivalents with Extended Recovery Time (Application-Dependent):
GF1A-E3/67A (Vishay General Semiconductor - Diodes Division) and RGF1A-E3/67A (Vishay General Semiconductor - Diodes Division) are active production parts suitable for applications where standard recovery time (2 µs) or extended recovery time (150 ns) does not impact circuit performance. Both carry ROHS3 compliance and operate across -65°C to 175°C temperature range.
Parts Not Recommended for New Designs:
GF1A (onsemi), ES1A-LTP (Micro Commercial Co), and GS1A-LTP (Micro Commercial Co) are designated "Not For New Designs" and should be used only for legacy system maintenance or repair applications where supply continuity is critical.
Compliance and Certification:
All recommended active production substitutes carry REACH Unaffected status and ROHS3 compliance certification, meeting current environmental and regulatory requirements. Moisture Sensitivity Level (MSL) 1 (Unlimited) is maintained across all qualified substitutes.
Frequently Asked Questions (FAQ)
Q1: Can ES1A-13-F directly replace CEFA101-G without circuit modification?
A: Yes. ES1A-13-F is electrically and mechanically identical to CEFA101-G. Both parts share 50 V reverse voltage rating, 1 A average rectified current, 920 mV forward voltage drop at 1 A, fast recovery ≤ 500ns, 25 ns reverse recovery time, and DO-214AC (SMA) package format. No circuit redesign or PCB layout changes are required.
Q2: What is the difference between DO-214AC and DO-214BA packages?
A: DO-214AC (SMA) and DO-214BA (GF1) are distinct surface mount package outlines with different footprint dimensions. Parts specified in DO-214BA package (such as EGF1A-E3/67A and GF1A-E3/67A) require PCB layout modifications and cannot be directly substituted into DO-214AC footprints without redesign. Verify PCB footprint compatibility before selecting a substitute part.
Q3: Why do some substitute parts have higher forward voltage drops (1.3 V vs. 920 mV)?
A: Forward voltage drop variation reflects different semiconductor material quality and manufacturing processes across manufacturers. RGF1A and RGF1A-E3/67A exhibit 1.3 V forward voltage at 1 A due to fast recovery design optimization. For general-purpose rectification applications, this variation is acceptable. For precision analog circuits or low-voltage power supplies, select substitutes with forward voltage closest to the original specification (920 mV to 950 mV range).
Q4: What is the significance of "Fast Recovery" versus "Standard Recovery" classification?
A: Fast Recovery (≤ 500ns) diodes exhibit shorter reverse recovery time (trr), reducing switching losses and electromagnetic interference in high-frequency switching applications. Standard Recovery (> 500ns) diodes are suitable for low-frequency rectification and power supply applications where switching speed is not critical. CEFA101-G is specified as Fast Recovery. Substitutes with Standard Recovery (GF1A, GF1A-E3/67A, GS1A-LTP) are acceptable only if circuit operating frequency does not require fast switching characteristics.
Q5: Are parts marked "Not For New Designs" suitable for production use?
A: Parts designated "Not For New Designs" (ES1A-LTP, GF1A, GS1A-LTP) are available for legacy system maintenance, repair, and field replacement only. These parts should not be selected for new product development or high-volume production. For new designs, select from active production status parts: ES1A-13-F, EGF1A, EGF1A-E3/67A, ES1A, RGF1A, RGF1A-E3/67A, or GF1A-E3/67A.
Q6: What inventory considerations apply when selecting a substitute?
A: ES1A-13-F (Diodes Incorporated) offers the highest inventory availability at 70,300 pcs, ensuring reliable supply for production volumes. EGF1A (Fairchild Semiconductor) provides 39,900 pcs, and ES1A (YAGEO) provides 80,200 pcs. Parts with lower inventory (GF1A-E3/67A: 2,800 pcs; RGF1A-E3/67A: 1,450 pcs) may require longer lead times for large-volume orders. Verify supplier availability and lead times before finalizing component selection.
Q7: Do all substitute parts meet current environmental compliance standards?
A: All recommended active production substitutes carry REACH Unaffected status and ROHS3 compliance certification. Moisture Sensitivity Level (MSL) 1 (Unlimited) is maintained across all qualified substitutes, indicating no special moisture handling requirements during storage, transport, or assembly. Verify compliance documentation with your component supplier for specific regulatory requirements in your target market.
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