High isolation voltage optocoupler MSKSEMI MEL357B designed for compact electronic devices and industrial control
Key Attributes
Model Number:
MEL357B
Product Custom Attributes
Fall Time:
3us
Output Current:
50mA
Rise Time:
4us
Vce Saturation(VCE(sat)):
100mV@20mA,1mA
Operating Temperature:
-55℃~+110℃
Load Voltage:
80V
Reverse Voltage:
9V
Current Transfer Ratio:
80%;160%
Forward Current(If):
50mA
Pd - Power Dissipation:
200mW
Number Of Channels:
-
Load Type:
Phototransistor
Input Type:
DC
Isolation Voltage(Vrms):
3.75kV
Mfr. Part #:
MEL357B
Package:
SOP-4
Product Description
Product Overview
The MEL357X is a compact surface-mount optocoupler designed for high-density applications. It comprises a gallium arsenide light-emitting diode and a phototransistor, offering superior miniaturization compared to DIP packages. Ideal for programmable controllers and various electronic devices, it provides excellent current transfer ratio (CTR) and high input-output isolation voltage.
Product Attributes
- Brand: Msksemi
- Product Line: MEL357X
- Packaging: SOP-4
Technical Specifications
| Model | Package | Minimum Packaging | Current Transfer Ratio (CTR) Range (IF=5mA, VCE=5V) | Input-Output Isolation Voltage (Viso) | Collector-Emitter Breakdown Voltage (BVCEO) |
|---|---|---|---|---|---|
| MEL357X | SOP-4 | 3000 | 50~600% | 3750 Vrms | 80V |
Application Fields
- Switching power supplies, smart meters
- Industrial control, measuring instruments
- Office equipment (e.g., copiers)
- Home appliances (e.g., air conditioners, fans, water heaters)
Electrical Characteristics (Ta=25)
| Parameter | Symbol | Condition | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|---|
| Input | Forward Voltage (VF) | IF=20mA | 1.2 | 1.4 | - | V |
| Reverse Current (IR) | VR=5V | - | - | 10 | A | |
| Terminal Capacitance (Ct) | V=0, f=1kHz | - | 30 | 250 | pF | |
| Output | Collector Dark Current (ICEO) | VCE=70V | - | - | 100 | nA |
| Collector-Emitter Breakdown Voltage (BVCEO) | IC=0.1mA, IF=0 | 80 | - | - | V | |
| Emitter-Collector Breakdown Voltage (BVECO) | IE=0.1mA, IF=0 | 7 | - | - | V | |
| Collector Power Dissipation (PC) | - | - | - | 150 | mW | |
| Transfer Characteristics | Current Transfer Ratio (CTR) | IF=5mA, VCE=5V | 50 | - | 400 | % |
| Collector-Emitter Saturation Voltage (VCE(sat)) | IF=20mA, IC=1mA | - | 0.1 | 0.2 | V | |
| Isolation Resistance (RISO) | DC1000V, 40~60%R.H. | 1x1011 | - | - | ||
| Isolation Capacitance (Cf) | V=0, f=1MHz | - | 0.6 | 1.0 | pF | |
| Cut-off Frequency (Fc) | VCE=5V, IC=2mA, RL=100, -3dB | - | 80 | - | kHz | |
| Switching Time | Rise Time (Tr) | VCE=10V, IC=2mA, RL=100 | - | 4 | 18 | s |
| Fall Time (Tf) | - | - | 3 | 18 | s |
Absolute Maximum Ratings (Ta=25)
| Parameter | Symbol | Rating | Unit |
|---|---|---|---|
| Input | Forward Current (IF) | 50 | mA |
| Forward Pulse Current (IFP) | 1 | A | |
| Reverse Voltage (VR) | 6 | V | |
| Power Dissipation (P) | 70 | mW | |
| Output | Collector Power Dissipation (PC) | 150 | mW |
| Collector Current (IC) | 50 | mA | |
| Collector-Emitter Voltage (VCEO) | 80 | V | |
| Total Power Dissipation (Ptot) | - | 200 | mW |
| Isolation Voltage (Viso) | - | 3750 Vrms | - |
| Operating Temperature (Topr) | - | -55~+110 | |
| Storage Temperature (Tstg) | - | -55~+125 | |
| Soldering Temperature (Tsol) | - | 260 |
CTR Grading Table
| Model | Body Mark | Grading Standard | IC(mA) | CTR (%) Min | CTR (%) Max |
|---|---|---|---|---|---|
| MEL357 | Blank | IF=5mA, VCE=5V, Ta=25C | 2.5 | 50 | 600 |
| MEL357A | A | IF=5mA, VCE=5V, Ta=25C | 4.0 | 80 | 160 |
| MEL357B | B | IF=5mA, VCE=5V, Ta=25C | 6.5 | 130 | 260 |
| MEL357C | C | IF=5mA, VCE=5V, Ta=25C | 10.0 | 200 | 400 |
| MEL357D | D | IF=5mA, VCE=5V, Ta=25C | 15.0 | 300 | 600 |
Outline Dimensions
Dimensions (mm):
| Length: 7.00 0.30 | Width: 5.20 0.20 | Height: 4.55 -0.15/+0.25 |
| Lead Pitch (TYP): 2.54 | Lead Width: 0.40 0.10 | Lead Length: 2.1 0.1 |
| Lead Thickness: 0.15 |
2504101957_MSKSEMI-MEL357B_C41383952.pdf
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