SL5500SD Optoisolator Equivalent & Substitute Parts

Part Overview

The SL5500SD 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 with transistor output and integrated base connection, housed in a 6-SMD surface mount package. The SL5500SD is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity.

Substiute Parts

SL5500SD

onsemiIn Stock: 18140SL5500SD Datasheet

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H11AV1SR2M

onsemiIn Stock: 2309H11AV1SR2M Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution compatibility for the SL5500SD is determined by the following critical parameters:

• Isolation Voltage Rating: The substitute must meet or exceed the 5300Vrms isolation requirement, or operate within acceptable system margins if lower.
• Output Configuration: The substitute must provide transistor output with base connection to maintain circuit interface compatibility.
• Package Type: The substitute must use 6-SMD, Gull Wing surface mount packaging for PCB layout compatibility.
• Number of Channels: Single-channel configuration is required.
• Current Transfer Ratio Range: The substitute must support the operational current transfer ratio window required by the application.
• Output Voltage and Current Ratings: The substitute must support the maximum output voltage (30V) and current (100mA) specifications.
• Vce Saturation: The substitute must maintain saturation voltage performance within acceptable limits.
• Operating Temperature Range: The substitute must cover the required temperature operating window.

The H11AV1SR2M qualifies as a substitute based on these parameters, with specific trade-offs noted in the comparison table below.

Parameter Comparison

Engineering Selection Recommendations

The H11AV1SR2M serves as an active substitute for the obsolete SL5500SD. Key considerations for selection:

Product Status: The H11AV1SR2M is classified as Active, ensuring ongoing availability and manufacturing support, whereas the SL5500SD is Obsolete.

Isolation Voltage: The H11AV1SR2M provides 4170Vrms isolation compared to the SL5500SD's 5300Vrms. Applications requiring the full 5300Vrms isolation margin must evaluate whether the reduced rating is acceptable within system design parameters.

Current Transfer Ratio: The H11AV1SR2M specifies a minimum CTR of 100% @ 10mA, compared to the SL5500SD's 40% minimum. This represents improved performance consistency and reduced part-to-part variation.

Switching Performance: The H11AV1SR2M exhibits faster turn-on and turn-off times (15µs typical for both) compared to the SL5500SD (20µs on, 50µs off maximum), enabling higher switching frequency operation.

Output Voltage Rating: The H11AV1SR2M supports 70V maximum output voltage versus the SL5500SD's 30V, providing additional design margin for higher-voltage applications.

Operating Temperature Range: The SL5500SD supports -55°C minimum temperature, while the H11AV1SR2M supports -40°C minimum. Applications requiring extended low-temperature operation below -40°C must retain the SL5500SD or identify alternative solutions.

Compliance: Both parts maintain identical Moisture Sensitivity Level (MSL 1), REACH Unaffected status, and ECCN/HTSUS classifications.

Frequently Asked Questions (FAQ)

Q: Can the H11AV1SR2M directly replace the SL5500SD in existing designs?

A: Direct replacement is possible if the application isolation voltage requirement is 4170Vrms or lower. The identical package type (6-SMD, Gull Wing), output configuration (transistor with base), and pinout enable direct PCB substitution. However, designs requiring the full 5300Vrms isolation rating must evaluate whether the reduced rating introduces unacceptable risk.

Q: What is the impact of the lower isolation voltage rating on system reliability?

A: The H11AV1SR2M's 4170Vrms rating represents a 1130Vrms reduction from the SL5500SD specification. The acceptability of this reduction depends on the application's isolation voltage margin requirements, safety standards compliance, and system operating conditions. This determination must be made by the design engineer based on specific application parameters.

Q: Are there differences in current handling capability between these parts?

A: The H11AV1SR2M does not specify maximum output current per channel, while the SL5500SD specifies 100mA. The H11AV1SR2M's maximum forward current is specified as 60mA (compared to 100mA for the SL5500SD), indicating reduced current handling capability on the input side.

Q: How do the switching characteristics compare?

A: The H11AV1SR2M provides faster switching performance with 15µs turn-on and turn-off times (both typical and maximum) compared to the SL5500SD's 20µs turn-on and 50µs turn-off maximum. This enables the H11AV1SR2M to support higher switching frequency applications.

Q: What is the significance of the higher minimum Current Transfer Ratio in the H11AV1SR2M?

A: The H11AV1SR2M's 100% minimum CTR (versus 40% for the SL5500SD) indicates tighter manufacturing tolerance and more consistent part-to-part performance. This reduces design margin requirements and simplifies circuit compensation strategies.

Q: Are there temperature range limitations when substituting?

A: The H11AV1SR2M operates from -40°C to 100°C, while the SL5500SD operates from -55°C to 100°C. Applications requiring operation below -40°C cannot use the H11AV1SR2M as a substitute.

Q: Do packaging and moisture sensitivity requirements differ?

A: Both parts use identical 6-SMD, Gull Wing surface mount packaging and maintain MSL 1 (Unlimited) moisture sensitivity classification, eliminating packaging-related substitution constraints.