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EL357NE-G Equivalent & Substitute Parts
Part Overview
The EL357NE-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 with unlimited moisture sensitivity level rating.
Substitute parts are identified based on matching critical electrical parameters: 3750Vrms isolation voltage, transistor output type, single-channel configuration, DC input, 80V maximum output voltage, and surface mount gull wing package style. Equivalent models maintain functional compatibility while offering variations in current transfer ratio ranges, output current capacity, and packaging formats.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Isolation Voltage | 3750Vrms |
| Number of Channels | 1 |
| Output Type | Transistor |
| Input Type | DC |
| Maximum Output Voltage | 80V |
| Output Current per Channel | 50mA |
| Mounting Type | Surface Mount |
| Package Style | 4-SMD, Gull Wing |
| Operating Temperature Range | -55°C to 110°C |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility is determined by the following mandatory parameters:
Critical Matching Parameters:
- Isolation voltage: 3750Vrms (all substitutes match)
- Output type: Transistor (all substitutes match)
- Number of channels: 1 (all substitutes match)
- Input type: DC (all substitutes match)
- Maximum output voltage: 80V (all substitutes match)
- Surface mount gull wing package configuration (all substitutes match)
- RoHS3 compliance (all substitutes match)
Variable Parameters (Allowed to Differ):
- Current Transfer Ratio ranges (50% to 600% depending on part variant)
- Output current capacity (50mA to 80mA)
- Forward voltage (1.2V to 1.3V)
- Vce saturation (200mV to 400mV)
- Operating temperature minimum (-40°C to -55°C)
- Packaging format (Tube, Tape & Reel, Cut Tape)
- Rise/Fall time specifications (3µs to 4µs)
Substitute parts are grouped by manufacturer and base product number. onsemi FODM121 series variants and Broadcom HCPL-181 series variants meet all critical electrical and mechanical compatibility requirements with the EL357NE-G.
Parameter Comparison
| Part Number | Manufacturer | Isolation Voltage | Channels | Output Type | Max Output Voltage | Output Current | CTR Min @ 5mA | CTR Max @ 5mA | Vce Sat (Max) | Operating Temp | Package |
|---|---|---|---|---|---|---|---|---|---|---|---|
| EL357NE-G | Everlight Electronics | 3750Vrms | 1 | Transistor | 80V | 50mA | 100% | 200% | 200mV | -55°C to 110°C | 4-SOP (2.54mm) |
| FODM121 | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | 50% | 600% | 400mV | -40°C to 110°C | 4-SMD |
| FODM121AR2 | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | 100% | 300% | 400mV | -40°C to 110°C | 4-SMD |
| FODM121B | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | 50% | 150% | 400mV | -40°C to 110°C | 4-SMD |
| FODM121C | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | 100% | 200% | 400mV | -40°C to 110°C | 4-SMD |
| FODM121CR2 | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | 100% | 200% | 400mV | -40°C to 110°C | 4-SMD |
| FODM121R2 | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | 50% | 600% | 400mV | -40°C to 110°C | 4-SMD |
| FODM124R2 | onsemi | 3750Vrms | 1 | Transistor | 80V | 80mA | 100% @ 1mA | 1200% @ 1mA | 400mV | -40°C to 110°C | 4-SMD |
| HCPL-181-000E | Broadcom Limited | 3750Vrms | 1 | Transistor | 80V | 50mA | 50% | 600% | 200mV | -55°C to 100°C | 4-SOIC (5.30mm) |
| HCPL-181-00AE | Broadcom Limited | 3750Vrms | 1 | Transistor | 80V | 50mA | 80% | 160% | 200mV | -55°C to 100°C | 4-Mini-Flat |
| HCPL-181-00BE | Broadcom Limited | 3750Vrms | 1 | Transistor | 80V | 50mA | 130% | 260% | 200mV | -55°C to 100°C | 4-Mini-Flat |
Engineering Selection Recommendations
Broadcom HCPL-181 Series (HCPL-181-000E, HCPL-181-00AE, HCPL-181-00BE):
These parts maintain the EL357NE-G output current specification of 50mA and Vce saturation of 200mV. HCPL-181-000E operates to -55°C minimum, matching the EL357NE-G lower temperature limit. HCPL-181-00AE and HCPL-181-00BE operate to -40°C minimum. All three are ROHS3 compliant with unlimited MSL rating. Package variants differ (4-SOIC and 4-Mini-Flat) from the original 4-SOP format but maintain gull wing surface mount configuration.
onsemi FODM121 Series (FODM121, FODM121AR2, FODM121B, FODM121C, FODM121CR2, FODM121R2):
These parts provide increased output current capacity of 80mA compared to the EL357NE-G 50mA specification. All variants are ROHS3 compliant with unlimited MSL rating. Operating temperature minimum is -40°C, which is 15°C higher than the EL357NE-G. Current transfer ratio ranges vary across variants: FODM121B offers the narrowest range (50% to 150%), while FODM121 and FODM121R2 offer the widest range (50% to 600%). FODM121C and FODM121CR2 match the EL357NE-G CTR specification (100% to 200%).
onsemi FODM124R2:
This variant operates at 1mA input current with significantly higher CTR (100% to 1200%), differing from the standard 5mA measurement point used by other substitutes and the main part.
All substitute parts maintain ROHS3 compliance and unlimited moisture sensitivity level, ensuring regulatory and environmental compatibility with the EL357NE-G.
Frequently Asked Questions (FAQ)
Q: Can FODM121 series parts directly replace EL357NE-G in all applications?
A: FODM121 series parts are electrically compatible based on isolation voltage, output type, and maximum voltage ratings. However, the operating temperature minimum is -40°C versus EL357NE-G at -55°C. Applications requiring operation below -40°C require Broadcom HCPL-181-000E or continued use of EL357NE-G. FODM121 series also provides 80mA output current versus 50mA for EL357NE-G, which is a capability increase suitable for higher load applications.
Q: What is the difference between FODM121C and FODM121CR2?
A: Both parts have identical electrical specifications with 100% to 200% CTR at 5mA. The primary difference is packaging format: FODM121C is supplied in Tube packaging, while FODM121CR2 is supplied in Tape & Reel (TR) format. Electrical performance and pin configuration are identical.
Q: Why do HCPL-181-00AE and HCPL-181-00BE use 4-Mini-Flat packages instead of 4-SOP?
A: The 4-Mini-Flat package is a surface mount gull wing configuration with different physical dimensions than 4-SOP. Both are surface mount technologies suitable for automated assembly. PCB layout and footprint design must accommodate the specific package geometry. The electrical functionality remains equivalent to EL357NE-G.
Q: Is FODM124R2 suitable as a substitute for EL357NE-G?
A: FODM124R2 meets all critical electrical parameters for substitution. However, it operates at 1mA input current with 100% to 1200% CTR at 1mA, whereas EL357NE-G and most other substitutes are specified at 5mA input. This difference in measurement conditions means FODM124R2 exhibits significantly higher current transfer ratio. Applications must account for this characteristic when selecting this variant.
Q: What is the inventory status of substitute parts?
A: Inventory levels vary significantly across substitutes. FODM121CR2 has the highest inventory at 66,880 pieces. HCPL-181-00BE has 103,100 pieces available. FODM121B has the lowest inventory at 2,600 pieces. Availability should be confirmed with suppliers for production requirements.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts are ROHS3 compliant with unlimited moisture sensitivity level (MSL 1), matching the EL357NE-G compliance status.
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