SL5504 Optoisolator Equivalent & Substitute Parts

Part Overview

The SL5504 is a 6-DIP optoisolator with transistor output and base connection, rated for 5300Vrms isolation voltage. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement. The SL5504 provides single-channel isolation with 25% to 400% current transfer ratio at 10mA input, suitable for applications requiring galvanic isolation with moderate to high current transfer performance.

Substiute Parts

SL5504

onsemiIn Stock: 1003SL5504 Datasheet

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H11AV1M

onsemiIn Stock: 16471H11AV1M Datasheet

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4N35

onsemiIn Stock: 979644N35 Datasheet

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6N136

onsemiIn Stock: 501706N136 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SL5504 is determined by the following critical parameters:

• Package compatibility: 6-DIP form factor (0.300", 7.62mm)
• Output configuration: Transistor with base connection
• Isolation voltage rating: Minimum 5300Vrms
• Current transfer ratio range: Minimum 25% at specified input current
• Maximum output voltage: Minimum 80V
• Maximum output current: Minimum 100mA per channel
• Operating temperature range: Must encompass -55°C to 100°C
• Input type: DC

The substitute parts listed below meet varying degrees of these criteria. Direct substitutes maintain all critical parameters. Functional alternatives may have reduced isolation voltage, different package configurations, or modified electrical characteristics that require circuit validation.

Parameter Comparison

Engineering Selection Recommendations

H11AV1M is the preferred active substitute for new designs. It maintains 6-DIP package compatibility, transistor-with-base output configuration, and comparable current transfer ratio performance. The isolation voltage is reduced to 4170Vrms, which is acceptable for applications not requiring the full 5300Vrms rating. This part is currently in active production status with RoHS3 compliance, ensuring long-term availability and regulatory alignment.

4N35 provides electrical equivalence at 5300Vrms isolation voltage and maintains the 6-DIP package. However, it is classified as obsolete, presenting the same procurement challenges as the SL5504. The maximum output voltage is significantly reduced to 30V, limiting applicability to lower-voltage circuits. This part is suitable only when isolation voltage and package form factor are critical and lower output voltage is acceptable.

6N136 is not recommended as a direct substitute. The 8-DIP package is incompatible with 6-DIP footprints, and the 2500Vrms isolation voltage is substantially lower than the SL5504 specification. The maximum output current of 8mA is insufficient for applications requiring 100mA output capability. This part may serve as a functional alternative only in designs where package change and reduced electrical performance are acceptable.

Frequently Asked Questions (FAQ)

Q: Can H11AV1M replace SL5504 in existing designs without circuit modification?

A: H11AV1M is pin-compatible in 6-DIP package and maintains transistor-with-base output. The primary difference is reduced isolation voltage (4170Vrms vs. 5300Vrms). If the original design does not require 5300Vrms isolation, direct substitution is possible. Verify that your application isolation requirements do not exceed 4170Vrms before implementation.

Q: Why is 4N35 listed as a substitute if it is also obsolete?

A: 4N35 is included because it matches the SL5504 in isolation voltage (5300Vrms), package (6-DIP), and output configuration (transistor with base). While both are obsolete, 4N35 has higher inventory availability. It serves as an alternative only when isolation voltage specification is non-negotiable and output voltage limitation to 30V is acceptable.

Q: Is 6N136 compatible with SL5504 applications?

A: 6N136 is not compatible due to package incompatibility (8-DIP vs. 6-DIP), significantly lower isolation voltage (2500Vrms), and insufficient output current (8mA vs. 100mA). Substitution would require PCB redesign and circuit validation. Use 6N136 only if your application can tolerate these reduced specifications and physical redesign is feasible.

Q: What is the impact of H11AV1M's reduced operating temperature minimum (-40°C vs. -55°C)?

A: H