SL5511 Equivalent & Substitute Parts

Part Overview

The SL5511 is an optoisolator transistor with base output manufactured by onsemi, rated for 5300Vrms isolation voltage in a 6-DIP package. This component provides galvanic isolation for single-channel DC input applications with transistor output capability. The SL5511 is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

SL5511

onsemiIn Stock: 5376SL5511 Datasheet

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H11AV1M

onsemiIn Stock: 16471H11AV1M Datasheet

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4N35-000E

Broadcom LimitedIn Stock: 39614N35-000E Datasheet

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H11A1

onsemiIn Stock: 19937H11A1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SL5511 is determined by the following critical parameters:

• Package compatibility: 6-DIP (0.300", 7.62mm) form factor
• Single-channel configuration with transistor output and base connection
• DC input type
• Operating temperature range: minimum -55°C support
• Isolation voltage rating: minimum 3550Vrms
• Output voltage capability: minimum 30V
• Output current capability: minimum 100mA per channel
• Vce saturation: maximum 400mV

Substitute parts must maintain mechanical and electrical compatibility across these parameters to ensure direct replacement capability in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

H11A1 provides direct electrical and mechanical equivalence to the SL5511, matching isolation voltage (5300Vrms), output voltage rating (30V), saturation voltage (400mV), and temperature range (-55°C ~ 100°C). Both parts are classified as obsolete, indicating limited future availability.

H11AV1M is an active product from onsemi with improved current transfer ratio performance (100% @ 10mA versus 25% @ 2mA) and higher output voltage capability (70V). The isolation voltage is reduced to 4170Vrms, and the minimum operating temperature is -40°C instead of -55°C. This part is suitable for applications where the lower isolation voltage and temperature range are acceptable.

4N35-000E is an active product from Broadcom Limited with the lowest isolation voltage (3550Vrms) among the substitutes. It maintains 30V output voltage and 100mA output current matching the SL5511. The Vce saturation is superior at 300mV. This part is suitable for applications where 3550Vrms isolation is sufficient and where Broadcom component qualification is acceptable.

For new designs requiring long-term availability, H11AV1M or 4N35-000E are preferred due to active product status. For direct replacement in existing designs, H11A1 provides the closest electrical match, though availability may be limited due to obsolete status.

Frequently Asked Questions (FAQ)

Q: Can H11AV1M replace SL5511 in all applications?

A: H11AV1M is mechanically compatible (6-DIP package) and functionally equivalent for most applications. However, the isolation voltage is reduced from 5300Vrms to 4170Vrms, and the minimum operating temperature is -40°C instead of -55°C. Verify that your application does not require the higher isolation voltage or lower temperature operation before substitution.

Q: What is the key difference between 4N35-000E and the SL5511?

A: The 4N35-000E has the lowest isolation voltage (3550Vrms) of the available substitutes. It maintains compatible output voltage (30V) and current (100mA) ratings. The Vce saturation is improved at 300mV. Confirm that 3550Vrms isolation meets your circuit requirements before selection.

Q: Why is H11A1 listed as a substitute if it is also obsolete?

A: H11A1 provides the closest electrical match to SL5511, with identical isolation voltage (5300Vrms), output voltage (30V), saturation voltage (400mV), and temperature range (-55°C ~ 100°C). It is listed for applications requiring these specific parameters. However, for new designs, active products H11AV1M or 4N35-000E are recommended.

Q: Are all substitute parts pin-compatible with SL5511?

A: All substitute parts use the 6-DIP (0.300", 7.62mm) package with through-hole mounting. Verify pinout compatibility with your specific circuit design, as internal connections may differ between manufacturers.

Q: Which substitute offers the best long-term availability?

A: H11AV1M and 4N35-000E are both classified as active products, providing superior long-term availability compared to the obsolete SL5511 and H11A1. Selection between these two depends on isolation voltage requirements (4170Vrms versus 3550Vrms) and manufacturer preference.