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EL817(S)(B)(TU)
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Product Detailed Parameters
- Description：OPTOISOLATOR 5KV 1CH TRANS 4-SMD
- Series：-
- Mfr：Everlight Electronics Co Ltd
- Package：Tape & Reel (TR)
- Number of Channels：1
- Voltage - Isolation：5000Vrms
- Current Transfer Ratio (Min)：130% @ 5mA
- Current Transfer Ratio (Max)：260% @ 5mA
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：4µs, 3µs
- Input Type：DC
- Output Type：Transistor
- Voltage - Output (Max)：35V
- Current - Output / Channel：50mA
- Voltage - Forward (Vf) (Typ)：1.2V
- Current - DC Forward (If) (Max)：60 mA
- Vce Saturation (Max)：200mV
- Operating Temperature：-55°C ~ 110°C
- Mounting Type：Surface Mount
- Package / Case：4-SMD, Gull Wing
- Supplier Device Package：4-SMD
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Overview
The EL817(S)(B)(TU) is a surface-mount transistor output optocoupler manufactured by Everlight Electronics. It features a single channel with an infrared emitting diode and an NPN phototransistor. The device provides high isolation voltage of 5000 Vrms between input and output circuits. Key electrical parameters include a maximum collector-emitter breakdown voltage of 35V, a maximum forward current of 60mA, and a typical rise/fall time of 4µs/3µs. The current transfer ratio ranges from 130% to 260% at IF=5mA and VCE=5V. It operates within a temperature range of -55°C to +110°C and is housed in a compact 4-SMD package.
Feature Summary
- High isolation voltage capability between input and output for enhanced safety
- Compact surface-mount design suitable for automated assembly
- Wide operating temperature range for diverse environmental conditions
- RoHS compliant and halogen-free construction
Applications
- Signal transmission between circuits of different potentials
- Interface between microprocessors and power control circuits
- Solid-state relay drivers
- Telecommunication equipment signal isolation
Procurement Notes
Verify the specific suffix configuration against the official Everlight datasheet to ensure compatibility with required lead spacing and tape-and-reel specifications. Confirm that the ordering code matches the exact CTR bin and package variant intended for the design. Cross-reference the component marking with the manufacturer's documentation to validate authenticity and production batch details before integration into the supply chain.
Selection Notes
Select this component when a surface-mount solution is required for galvanic isolation in low-to-medium speed digital signaling applications. Ensure the design accounts for the specified current transfer ratio variations across temperature ranges. Verify that the PCB footprint matches the 4-SMD outline dimensions provided in the mechanical drawings. Consider thermal management requirements given the wide operating temperature specification.
Part Context
This part belongs to the EL817 series of photocouplers, which are widely used for electrical isolation. The series includes through-hole DIP variants and various surface-mount configurations. The EL817(S)(B)(TU) specifically denotes the SMD version with B-grade CTR characteristics. It is part of Everlight's standard optoelectronic portfolio designed for cost-effective isolation solutions in consumer and industrial electronics.
Replacement Considerations
Publicly confirmed substitute part numbers are not available in the provided source material. Designers should consult official cross-reference guides or contact the manufacturer directly for verified equivalent components that meet identical electrical and mechanical specifications.
