Request Quote
(Ships tomorrow)
EL357NF-G Equivalent & Substitute Parts
Part Overview
The EL357NF-G is a single-channel optoisolator with transistor output manufactured by Everlight Electronics Co Ltd. This component provides 3750Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation in 4-SOP surface mount packaging. The part is Active status and ROHS3 compliant. Substitute parts are identified based on matching isolation voltage, output type, channel configuration, and compatible package form factors to ensure functional equivalence in circuit applications.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | EL357NF-G |
| Manufacturer | Everlight Electronics Co Ltd |
| Category | Optoisolators |
| Number of Channels | 1 |
| Voltage - Isolation | 3750Vrms |
| Output Type | Transistor |
| Input Type | DC |
| Voltage - Output (Max) | 80V |
| Current - Output / Channel | 50mA |
| Current Transfer Ratio (Min) | 150% @ 5mA |
| Current Transfer Ratio (Max) | 300% @ 5mA |
| Vce Saturation (Max) | 200mV |
| Operating Temperature | -55°C ~ 110°C |
| Mounting Type | Surface Mount |
| Package / Case | 4-SMD, Gull Wing |
| RoHS Status | ROHS3 Compliant |
| Product Status | Active |
Substitute Part Grouping Explanation
Substitute parts for the EL357NF-G are qualified based on the following critical parameters:
Primary Matching Criteria:
- Voltage - Isolation: 3750Vrms (exact match required)
- Number of Channels: 1 (single channel)
- Output Type: Transistor
- Input Type: DC
- Mounting Type: Surface Mount
Secondary Compatibility Parameters:
- Voltage - Output (Max): 80V or greater
- Current - Output / Channel: 50mA or greater
- Vce Saturation (Max): 200mV or less preferred for direct replacement
- Operating Temperature Range: Must encompass or overlap with -55°C ~ 110°C
- RoHS Status: ROHS3 Compliant
Package Considerations: Substitute parts may use different package form factors (4-SOP, 4-SMD, 4-SOIC, 4-Mini-Flat) provided they maintain surface mount gull wing configuration and are mechanically compatible with PCB layout requirements.
Current Transfer Ratio Flexibility: The EL357NF-G specifies 150% to 300% @ 5mA. Substitute parts with different CTR ranges (including wider ranges such as 50% to 600%) are acceptable when the application circuit design accommodates the variation through input current adjustment or output load impedance selection.
Parameter Comparison
| Part Number | Manufacturer | Isolation Voltage | Channels | Output Type | Max Output Current | Vce Sat (Max) | Operating Temp | Package Type | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| EL357NF-G | Everlight Electronics | 3750Vrms | 1 | Transistor | 50mA | 200mV | -55°C ~ 110°C | 4-SOP (2.54mm) | ROHS3 |
| FODM121 | onsemi | 3750Vrms | 1 | Transistor | 80mA | 400mV | -40°C ~ 110°C | 4-SMD | ROHS3 |
| FODM121AR2 | onsemi | 3750Vrms | 1 | Transistor | 80mA | 400mV | -40°C ~ 110°C | 4-SMD | ROHS3 |
| FODM121B | onsemi | 3750Vrms | 1 | Transistor | 80mA | 400mV | -40°C ~ 110°C | 4-SMD | ROHS3 |
| FODM121C | onsemi | 3750Vrms | 1 | Transistor | 80mA | 400mV | -40°C ~ 110°C | 4-SMD | ROHS3 |
| FODM121CR2 | onsemi | 3750Vrms | 1 | Transistor | 80mA | 400mV | -40°C ~ 110°C | 4-SMD | ROHS3 |
| FODM121R2 | onsemi | 3750Vrms | 1 | Transistor | 80mA | 400mV | -40°C ~ 110°C | 4-SMD | ROHS3 |
| FODM124R2 | onsemi | 3750Vrms | 1 | Transistor | 80mA | 400mV | -40°C ~ 110°C | 4-SMD | ROHS3 |
| HCPL-181-000E | Broadcom Limited | 3750Vrms | 1 | Transistor | 50mA | 200mV | -55°C ~ 100°C | 4-SOIC (5.30mm) | ROHS3 |
| HCPL-181-00AE | Broadcom Limited | 3750Vrms | 1 | Transistor | 50mA | 200mV | -55°C ~ 100°C | 4-Mini-Flat | ROHS3 |
| HCPL-181-00BE | Broadcom Limited | 3750Vrms | 1 | Transistor | 50mA | 200mV | -55°C ~ 100°C | 4-Mini-Flat | ROHS3 |
Engineering Selection Recommendations
Direct Electrical Equivalents (Preferred Substitutes):
The HCPL-181-000E, HCPL-181-00AE, and HCPL-181-00BE from Broadcom Limited match the EL357NF-G in maximum output current (50mA), Vce saturation (200mV), and isolation voltage (3750Vrms). These parts are Active status and ROHS3 compliant. The HCPL-181-000E uses 4-SOIC packaging while HCPL-181-00AE and HCPL-181-00BE use 4-Mini-Flat packaging. PCB layout modifications may be required to accommodate different package footprints.
Functional Equivalents with Enhanced Specifications:
The onsemi FODM121 series (FODM121, FODM121AR2, FODM121B, FODM121C, FODM121CR2, FODM121R2) and FODM124R2 provide 3750Vrms isolation with higher maximum output current (80mA) and are Active status ROHS3 compliant. These parts feature higher Vce saturation (400mV maximum) and narrower low-temperature operating range (-40°C minimum versus -55°C). The FODM121 series variants differ in Current Transfer Ratio specifications. FODM124R2 offers enhanced CTR performance (100% to 1200% @ 1mA). All onsemi parts use 4-SMD gull wing packaging compatible with standard surface mount assembly.
Temperature Range Consideration:
The EL357NF-G operates from -55°C to 110°C. The HCPL-181 series operates from -55°C to 100°C (10°C reduction at upper limit). The FODM121 series operates from -40°C to 110°C (15°C reduction at lower limit). Applications requiring full -55°C operation must use EL357NF-G or HCPL-181 series. Applications requiring operation above 100°C must use EL357NF-G or FODM121 series.
Packaging and Assembly Impact:
All substitute parts maintain surface mount gull wing configuration. Package footprint differences require PCB layout verification. The 4-SOP (2.54mm) of EL357NF-G differs from 4-SMD, 4-SOIC, and 4-Mini-Flat packages used by substitutes. Mechanical compatibility with existing PCB designs must be confirmed before part selection.
Frequently Asked Questions (FAQ)
Q: Can FODM121 series parts directly replace EL357NF-G without circuit modification?
A: FODM121 series parts are functionally equivalent for isolation voltage, channel count, and output type. However, higher Vce saturation (400mV versus 200mV) and different Current Transfer Ratio ranges require circuit analysis. Input current and output load impedance may require adjustment. Package footprint differences necessitate PCB layout changes.
Q: What is the difference between FODM121, FODM121B, FODM121C, and FODM121CR2?
A: These parts share identical isolation voltage, output current, and operating temperature specifications. They differ in Current Transfer Ratio ranges: FODM121 (50-600%), FODM121B (50-150%), FODM121C (100-200%), and FODM121CR2 (100-200%). Packaging differs: FODM121 and FODM121B use Tube, FODM121C uses Tube, FODM121CR2 uses Tape & Reel. Selection depends on required CTR performance and supply chain packaging requirements.
Q: Is HCPL-181-000E suitable for applications requiring -55°C operation?
A: Yes. HCPL-181-000E operates from -55°C to 100°C, matching the lower temperature limit of EL357NF-G. However, maximum operating temperature is 100°C versus 110°C for EL357NF-G. Applications requiring operation above 100°C must use EL357NF-G or FODM121 series.
Q: What are the packaging differences between HCPL-181-00AE and HCPL-181-00BE?
A: Both use 4-Mini-Flat surface mount packages with identical electrical specifications. They differ in Current Transfer Ratio: HCPL-181-00AE (80-160% @ 5mA) and HCPL-181-00BE (130-260% @ 5mA). Selection depends on circuit input current requirements and desired output switching characteristics.
Q: Can FODM124R2 replace EL357NF-G?
A: FODM124R2 meets isolation voltage, channel count, and output type requirements. It provides enhanced Current Transfer Ratio (100-1200% @ 1mA) enabling operation at lower input currents. Vce saturation (400mV) is higher than EL357NF-G (200mV). Operating temperature range is -40°C to 110°C. Circuit design must accommodate higher CTR and Vce saturation specifications. Package footprint differs from EL357NF-G.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts (FODM121 series, FODM124R2, and HCPL-181 series) are ROHS3 compliant, matching the compliance status of EL357NF-G.
Q: What is the impact of different package types on PCB design?
A: EL357NF-G uses 4-SOP (2.54mm) with specific pin spacing and body dimensions. FODM121 series uses 4-SMD, HCPL-181-000E uses 4-SOIC (5.30mm width), and HCPL-181-00AE/00BE use 4-Mini-Flat. Each package requires different PCB footprints, trace routing, and solder pad geometry. Mechanical compatibility must be verified before design implementation.
Q: Which substitute offers the closest electrical match to EL357NF-G?
A: HCPL-181-000E, HCPL-181-00AE, and HCPL-181-00BE provide identical maximum output current (50mA) and Vce saturation (200mV). HCPL-181-000E and HCPL-181-00AE/00BE differ only in package type. These parts require only package footprint adaptation for direct substitution.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts