SL5500W Equivalent & Substitute Parts

Part Overview

The SL5500W is an optoisolator transistor with base output manufactured by onsemi, designed for high-voltage isolation applications requiring 5300Vrms isolation rating. This component features a single-channel configuration in a 6-DIP package and is classified as obsolete. Due to its obsolete status, identifying functionally equivalent substitute parts is essential for design continuity and procurement planning in applications where this component was originally specified.

Substiute Parts

SL5500W

onsemiIn Stock: 5399SL5500W Datasheet

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4N26

Texas InstrumentsIn Stock: 5217894N26 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SL5500W optoisolator are identified based on the following critical parameters that determine functional equivalence:

• Isolation Voltage: Minimum 5000Vrms (SL5500W specifies 5300Vrms)
• Number of Channels: Single channel configuration
• Output Type: Transistor with base output
• Package Type: 6-DIP through-hole mounting
• Operating Temperature Range: -55°C to 100°C minimum
• Input Type: DC input
• Current Transfer Ratio: Minimum 20% @ 10mA

The 4N26 manufactured by Texas Instruments meets these substitution criteria with an isolation voltage of 5000Vrms, single-channel transistor output configuration, and compatible 6-DIP package. Both components operate across the same temperature range and accept DC input signals.

Parameter Comparison

Engineering Selection Recommendations

The 4N26 optoisolator from Texas Instruments serves as a functional substitute for the obsolete SL5500W. The 4N26 maintains active product status, ensuring ongoing availability and manufacturer support. Both components share identical single-channel transistor output architecture, DC input configuration, and compatible operating temperature specifications.

Key considerations for substitution:

• The 4N26 provides 5000Vrms isolation, which is 300Vrms lower than the SL5500W. Applications requiring the full 5300Vrms isolation specification must evaluate whether 5000Vrms meets system requirements.
• The 4N26 output current rating is 50mA per channel, compared to 100mA for the SL5500W. Circuit designs must verify that output current requirements do not exceed 50mA.
• The 4N26 package body is smaller (0.300" vs 0.400"), which may affect PCB layout compatibility despite both using 6-DIP through-hole mounting.
• The 4N26 is RoHS non-compliant, whereas the SL5500W status is not specified. Compliance requirements must be evaluated against application standards.

Frequently Asked Questions (FAQ)

Q: Can the 4N26 directly replace the SL5500W without circuit modifications?

A: The 4N26 is functionally compatible for applications where the 5000Vrms isolation rating is acceptable and output current does not exceed 50mA. Circuit modifications may be necessary if the original design relied on the SL5500W's 100mA output current capability or 5300Vrms isolation specification.

Q: What is the primary difference in package dimensions between these components?

A: Both components use 6-DIP through-hole packages, but the SL5500W package body measures 0.400" (10.16mm) while the 4N26 measures 0.300" (7.62mm). PCB footprints must accommodate the smaller 4N26 body dimensions.

Q: Are there any compliance differences between the SL5500W and 4N26?

A: The 4N26 is classified as RoHS non-compliant. Applications subject to RoHS requirements must verify compliance status against applicable regulations before substitution.

Q: What are the current transfer ratio differences?

A: The SL5500W specifies a minimum current transfer ratio of 40% at 10mA input, while the 4N26 specifies 20% minimum. The SL5500W also provides a maximum specification of 300%, whereas the 4N26 maximum is not specified. Circuit designs relying on specific current transfer ratio performance must account for these differences.

Q: Is the 4N26 suitable for new designs?

A: Yes. The 4N26 maintains active product status with established manufacturer support and broad inventory availability, making it suitable for both replacement and new design applications requiring single-channel optoisolator transistor output in 6-DIP configuration.