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EL357NE(TB)-VG Equivalent & Substitute Parts
Part Overview
The EL357NE(TB)-VG is an optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides 3750Vrms isolation voltage in a 4-SOP surface mount package, designed for DC input applications requiring galvanic isolation. The part is Active status and ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required for design flexibility, supply chain alternatives, or packaging preferences.
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 |
| Current Transfer Ratio (Min) | 100% @ 5mA |
| Current Transfer Ratio (Max) | 200% @ 5mA |
| Vce Saturation (Max) | 200mV |
| Operating Temperature Range | -55°C to 110°C |
| Package Type | 4-SMD, Gull Wing |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitute parts for the EL357NE(TB)-VG are identified based on strict equivalence in the following critical parameters:
Primary Substitution Criteria:
- Isolation voltage: 3750Vrms (mandatory match)
- Number of channels: 1 (mandatory match)
- Output type: Transistor (mandatory match)
- Input type: DC (mandatory match)
- Maximum output voltage: 80V (mandatory match)
- Package compatibility: 4-SMD or 4-SOP configurations with gull wing leads
- RoHS3 compliance and MSL 1 rating
Secondary Compatibility Parameters:
- Current Transfer Ratio range (minimum 50% @ 5mA acceptable)
- Maximum output current (50mA or higher acceptable)
- Vce saturation (200mV to 400mV acceptable range)
- Operating temperature range (-40°C to 110°C minimum acceptable)
The following substitute parts meet these criteria and are grouped by manufacturer and packaging configuration.
Parameter Comparison
| Part Number | Manufacturer | Isolation Voltage | CTR Min @ 5mA | CTR Max @ 5mA | Output Current | Vce Sat (Max) | Temp Range | Package | RoHS3 |
|---|---|---|---|---|---|---|---|---|---|
| EL357NE(TB)-VG | Everlight | 3750Vrms | 100% | 200% | 50mA | 200mV | -55 to 110°C | 4-SOP | Yes |
| FODM121 | onsemi | 3750Vrms | 50% | 600% | 80mA | 400mV | -40 to 110°C | 4-SMD | Yes |
| FODM121AR2 | onsemi | 3750Vrms | 100% | 300% | 80mA | 400mV | -40 to 110°C | 4-SMD | Yes |
| FODM121B | onsemi | 3750Vrms | 50% | 150% | 80mA | 400mV | -40 to 110°C | 4-SMD | Yes |
| FODM121C | onsemi | 3750Vrms | 100% | 200% | 80mA | 400mV | -40 to 110°C | 4-SMD | Yes |
| FODM121CR2 | onsemi | 3750Vrms | 100% | 200% | 80mA | 400mV | -40 to 110°C | 4-SMD | Yes |
| FODM121R2 | onsemi | 3750Vrms | 50% | 600% | 80mA | 400mV | -40 to 110°C | 4-SMD | Yes |
| FODM124R2 | onsemi | 3750Vrms | 100% @ 1mA | 1200% @ 1mA | 80mA | 400mV | -40 to 110°C | 4-SMD | Yes |
| HCPL-181-000E | Broadcom | 3750Vrms | 50% | 600% | 50mA | 200mV | -55 to 100°C | 4-SOIC | Yes |
| HCPL-181-00AE | Broadcom | 3750Vrms | 80% | 160% | 50mA | 200mV | -55 to 100°C | 4-Mini-Flat | Yes |
| HCPL-181-00BE | Broadcom | 3750Vrms | 130% | 260% | 50mA | 200mV | -55 to 100°C | 4-Mini-Flat | Yes |
Engineering Selection Recommendations
Direct Electrical Equivalents (Closest Match):
HCPL-181-000E and HCPL-181-00BE from Broadcom maintain the same 50mA output current and 200mV Vce saturation as the EL357NE(TB)-VG. These parts are suitable for applications where output current and saturation voltage specifications are critical design constraints. HCPL-181-000E operates to -55°C minimum temperature, matching the EL357NE(TB)-VG lower temperature limit.
Higher Output Current Alternatives:
FODM121 series parts from onsemi provide 80mA output current capability, exceeding the EL357NE(TB)-VG specification. These parts are suitable for applications requiring higher output drive capability. FODM121C and FODM121CR2 provide Current Transfer Ratio matching (100% to 200% @ 5mA) identical to the main part.
Packaging Considerations:
The EL357NE(TB)-VG uses 4-SOP (2.54mm) packaging. Substitute parts use 4-SMD, 4-SOIC, or 4-Mini-Flat packages. PCB layout modifications are required when substituting between these package types. All substitute parts maintain gull wing lead configuration compatible with standard surface mount assembly processes.
Temperature Range Limitations:
FODM121 series and FODM124R2 operate from -40°C minimum, which is 15°C higher than the EL357NE(TB)-VG. Applications requiring operation below -40°C must use EL357NE(TB)-VG, HCPL-181-000E, HCPL-181-00AE, or HCPL-181-00BE.
Compliance Status:
All listed substitute parts are Active status, ROHS3 compliant, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the main part specifications.
Frequently Asked Questions (FAQ)
Q: Can FODM121 series parts directly replace EL357NE(TB)-VG without circuit modification?
A: FODM121 series parts are electrically compatible for the core isolation and switching functions. However, the higher Vce saturation (400mV vs 200mV) and different output current rating (80mA vs 50mA) may affect circuit performance. PCB layout changes are required due to different package types (4-SMD vs 4-SOP).
Q: What is the difference between FODM121, FODM121AR2, FODM121B, and FODM121C?
A: These parts differ in Current Transfer Ratio specifications. FODM121 and FODM121R2 specify 50% to 600% CTR. FODM121AR2 specifies 100% to 300% CTR. FODM121B specifies 50% to 150% CTR. FODM121C and FODM121CR2 specify 100% to 200% CTR, matching the EL357NE(TB)-VG specification.
Q: Are HCPL-181 series parts suitable for high-temperature applications?
A: HCPL-181 series parts operate to 100°C maximum, which is 10°C lower than the EL357NE(TB)-VG (110°C maximum). For applications requiring operation above 100°C, use EL357NE(TB)-VG or FODM121 series parts rated to 110°C.
Q: What is the significance of the "R2" suffix in part numbers like FODM121AR2 and FODM121CR2?
A: The "R2" suffix indicates Tape & Reel packaging format. Parts without this suffix are supplied in Tube packaging. Both formats contain identical components; packaging format selection depends on assembly process requirements and volume.
Q: Can FODM124R2 be used as a substitute for EL357NE(TB)-VG?
A: FODM124R2 meets the isolation voltage, channel count, and package compatibility requirements. However, it specifies Current Transfer Ratio at 1mA input current (100% to 1200% @ 1mA) rather than 5mA. This different measurement condition requires circuit analysis to confirm suitability for the specific application.
Q: What are the package dimension differences between 4-SOP, 4-SOIC, and 4-Mini-Flat?
A: 4-SOP (2.54mm) is the original package for EL357NE(TB)-VG. 4-SOIC (0.209", 5.30mm width) is wider. 4-Mini-Flat is a compact surface mount package. PCB footprints are not interchangeable; layout redesign is required when changing package types.
Q: Are all substitute parts REACH compliant?
A: FODM121 series and FODM124R2 parts are marked REACH Unaffected. HCPL-181 series parts are marked REACH Unaffected. The main part EL357NE(TB)-VG does not specify REACH status in the provided data.
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