ISQ1X Optoisolator - Equivalent & Substitute Parts

Part Overview

The ISQ1X is a 4-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. It provides 5300Vrms isolation voltage and is designed for applications requiring galvanic isolation in DC input circuits. The device is currently in active production status with 5490 units in stock. Finding equivalent parts may be necessary due to supply chain considerations, design flexibility, or specific application requirements where alternative manufacturers' components meet the same electrical and mechanical specifications.

Substiute Parts

ISQ1X

Isocom Components 2004 LTDIn Stock: 5576ISQ1X Datasheet

Current PartRFQ

ILQ1

Vishay Semiconductor Opto DivisionIn Stock: 4428ILQ1 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISQ1X is determined by strict equivalence across the following critical parameters:

• Channel Configuration: 4 channels required
• Isolation Voltage: 5300Vrms minimum
• Output Type: Transistor output
• Maximum Output Voltage: 50V
• Maximum Output Current: 50mA per channel
• Current Transfer Ratio Range: 20% to 300% @ 10mA
• Package: 16-DIP (0.300", 7.62mm) through-hole
• Input Type: DC
• Compliance: ROHS3 compliant, REACH unaffected

The ILQ1 manufactured by Vishay Semiconductor Opto Division meets all these critical parameters and qualifies as a direct substitute.

Parameter Comparison

Engineering Selection Recommendations

The ISQ1X and ILQ1 are electrically and mechanically equivalent across all critical isolation, channel, output, and package specifications. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements.

The ISQ1X maintains active production status with 5490 units currently in inventory. The ILQ1 is designated as Last Time Buy, indicating limited future availability from the manufacturer. Selection between these parts should be based on supply chain requirements and long-term availability needs. Both devices are suitable for direct substitution in 16-DIP through-hole applications requiring 5300Vrms isolation with 4-channel transistor output.

Frequently Asked Questions (FAQ)

Q: Can the ILQ1 be used as a direct replacement for the ISQ1X?

A: Yes. Both devices share identical channel count (4), isolation voltage (5300Vrms), output type (transistor), maximum output voltage (50V), maximum output current per channel (50mA), current transfer ratio range (20% to 300% @ 10mA), and 16-DIP package configuration. Electrical and mechanical compatibility is confirmed.

Q: Are there differences in operating temperature ranges?

A: The ISQ1X operates from -25°C to 100°C, while the ILQ1 operates from -40°C to 100°C. The ILQ1 provides extended low-temperature operation. For applications within the ISQ1X temperature range, both are suitable.

Q: What is the significance of the ILQ1's Last Time Buy status?

A: Last Time Buy indicates the manufacturer has announced end-of-life for this product. New orders may be accepted for a limited period, but long-term availability cannot be assured. The ISQ1X, with active status, offers better long-term supply security.

Q: Are both parts suitable for through-hole PCB assembly?

A: Yes. Both the ISQ1X and ILQ1 use 16-DIP (0.300", 7.62mm) through-hole packaging and are compatible with standard through-hole assembly processes.

Q: Do both parts meet current compliance requirements?

A: Yes. Both the ISQ1X and ILQ1 are ROHS3 compliant and REACH unaffected, meeting current regulatory standards for electronic components.