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EL357NE(TB)-G Equivalent & Substitute Parts
Part Overview
The EL357NE(TB)-G is an optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides 3750Vrms isolation voltage in a single-channel configuration with 4-SOP surface mount packaging. The device is classified as Active product status and is RoHS3 compliant. Substitute parts are necessary to address supply chain availability, packaging preferences, current transfer ratio specifications, or output current requirements that may vary across application requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Isolation Voltage | 3750Vrms |
| Number of Channels | 1 |
| Output Type | Transistor |
| Input Type | DC |
| Maximum Output Voltage | 80V |
| Maximum Output Current | 50mA |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -55°C to 110°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the EL357NE(TB)-G is determined by the following critical parameters:
Primary Matching Criteria:
- Isolation voltage of 3750Vrms
- Single channel configuration
- Transistor output type
- DC input type
- Maximum output voltage of 80V
- Surface mount mounting type
- RoHS3 compliance
- Moisture sensitivity level 1
Secondary Consideration Parameters:
- Current transfer ratio specifications (may vary by grade)
- Output current capability (50mA minimum for EL357NE(TB)-G; some substitutes support 80mA)
- Operating temperature range (-55°C to 110°C for main part; some substitutes operate to -40°C minimum)
- Package form factor (4-SOP, 4-SMD, 4-SOIC, 4-Mini-Flat variations)
- Packaging type (Tube, Tape & Reel, Cut Tape)
Substitute parts meeting all primary criteria are electrically compatible. Differences in secondary parameters require application-level evaluation.
Parameter Comparison
| Part Number | Manufacturer | Isolation Voltage | Channels | Output Type | Max Output Voltage | Max Output Current | Operating Temp Range | Package Type | Packaging |
|---|---|---|---|---|---|---|---|---|---|
| EL357NE(TB)-G | Everlight Electronics | 3750Vrms | 1 | Transistor | 80V | 50mA | -55°C to 110°C | 4-SOP (2.54mm) | Surface Mount |
| FODM121 | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | -40°C to 110°C | 4-SMD | Tube |
| FODM121AR2 | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | -40°C to 110°C | 4-SMD | Tape & Reel |
| FODM121B | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | -40°C to 110°C | 4-SMD | Tube |
| FODM121C | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | -40°C to 110°C | 4-SMD | Tube |
| FODM121CR2 | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | -40°C to 110°C | 4-SMD | Tape & Reel |
| FODM121R2 | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | -40°C to 110°C | 4-SMD | Tape & Reel |
| FODM124R2 | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | -40°C to 110°C | 4-SMD | Cut Tape & Digi-Reel |
| HCPL-181-000E | Broadcom Limited | 3750Vrms | 1 | Transistor | 80V | 50mA | -55°C to 100°C | 4-SOIC (0.209", 5.30mm) | Cut Tape & Digi-Reel |
| HCPL-181-00AE | Broadcom Limited | 3750Vrms | 1 | Transistor | 80V | 50mA | -55°C to 100°C | 4-Mini-Flat | Cut Tape & Digi-Reel |
| HCPL-181-00BE | Broadcom Limited | 3750Vrms | 1 | Transistor | 80V | 50mA | -55°C to 100°C | 4-Mini-Flat | Cut Tape & Digi-Reel |
Engineering Selection Recommendations
Broadcom HCPL-181 Series (HCPL-181-000E, HCPL-181-00AE, HCPL-181-00BE): These parts maintain the 50mA output current specification of the EL357NE(TB)-G and are RoHS3 compliant with MSL 1 rating. The HCPL-181-000E operates to -55°C minimum, matching the main part's lower temperature limit. HCPL-181-00AE and HCPL-181-00BE operate to -40°C minimum. All three are Active status products. Package differences exist: HCPL-181-000E uses 4-SOIC form factor, while HCPL-181-00AE and HCPL-181-00BE use 4-Mini-Flat packaging. PCB layout modifications may be required for package transitions.
onsemi FODM121 Series (FODM121, FODM121AR2, FODM121B, FODM121C, FODM121CR2, FODM121R2): These parts provide 80mA output current capability, exceeding the EL357NE(TB)-G specification. All are RoHS3 compliant with MSL 1 rating and Active status. Operating temperature minimum is -40°C, which is 15°C higher than the main part. All use 4-SMD packaging with Gull Wing configuration. Packaging options include Tube, Tape & Reel, and Cut Tape variants. Current transfer ratio grades vary across the series (50% to 600% @ 5mA depending on grade).
onsemi FODM124R2: This part operates at 100% to 1200% current transfer ratio @ 1mA, differing from the 5mA reference point used by other parts. It provides 80mA output current and operates to -40°C minimum. RoHS3 compliant with MSL 1 rating and Active status. Supplied in Cut Tape & Digi-Reel packaging.
All listed substitutes are Active status products with RoHS3 compliance and MSL 1 moisture sensitivity rating, meeting regulatory and environmental requirements equivalent to the main part.
Frequently Asked Questions (FAQ)
Q: Can FODM121 series parts directly replace EL357NE(TB)-G in existing PCB layouts?
A: FODM121 series parts use 4-SMD Gull Wing packaging, while EL357NE(TB)-G uses 4-SOP (2.54mm) packaging. Physical footprints differ. PCB layout modification is required. Pin-to-pin electrical compatibility exists for the specified functions.
Q: What is the difference between FODM121, FODM121B, and FODM121C?
A: These parts differ in current transfer ratio specifications. FODM121 and FODM121R2 specify 50% to 600% @ 5mA. FODM121B specifies 50% to 150% @ 5mA. FODM121C and FODM121CR2 specify 100% to 200% @ 5mA. All maintain identical isolation voltage, output voltage, and output current ratings.
Q: Why do some substitutes specify -40°C minimum operating temperature while EL357NE(TB)-G specifies -55°C?
A: Operating temperature range is a device characteristic determined by manufacturer design and testing. Applications requiring operation below -40°C must use EL357NE(TB)-G or HCPL-181-000E, which both specify -55°C minimum.
Q: What is the significance of packaging designations like "Tape & Reel" versus "Tube"?
A: Packaging type affects supply format and handling. Tape & Reel packaging is suitable for automated assembly processes. Tube packaging is used for manual handling or lower-volume applications. Electrical performance is identical; selection depends on manufacturing process requirements.
Q: Are HCPL-181-00AE and HCPL-181-00BE interchangeable?
A: Both use 4-Mini-Flat packaging and maintain identical isolation voltage, output voltage, and output current specifications. They differ in current transfer ratio: HCPL-181-00AE specifies 80% to 160% @ 5mA, while HCPL-181-00BE specifies 130% to 260% @ 5mA. Selection depends on application current transfer ratio requirements.
Q: Can FODM124R2 be used where FODM121 is specified?
A: FODM124R2 differs in current transfer ratio measurement reference: 100% to 1200% @ 1mA versus FODM121's 50% to 600% @ 5mA. These represent different device grades. Substitution requires verification that the application can operate with FODM124R2's higher current transfer ratio characteristics at the specified input current level.
Q: What does MSL 1 (Unlimited) moisture sensitivity level mean?
A: MSL 1 indicates the component has unlimited shelf life under standard storage conditions and requires no special moisture control during handling or storage. All listed parts share this specification with the main part.
Q: Is the 50mA output current of EL357NE(TB)-G sufficient, or should I use 80mA-rated substitutes?
A: Output current rating must match or exceed application requirements. If the application requires 50mA or less, EL357NE(TB)-G and 50mA-rated substitutes (HCPL-181 series) are appropriate. If the application requires higher current, 80mA-rated substitutes (FODM121 series, FODM124R2) provide additional margin.
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