ILQ5-X009 Equivalent & Substitute Parts

Part Overview

The ILQ5-X009 is a 4-channel optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. It provides 5300Vrms isolation voltage and is designed for applications requiring high-voltage galvanic isolation with DC input and transistor output configuration. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Substiute Parts

ILQ5-X009

Vishay Semiconductor Opto DivisionIn Stock: 1110ILQ5-X009 Datasheet

Current PartRFQ

LTV-846S

Lite-On Inc.In Stock: 2298LTV-846S Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ILQ5-X009 is determined by the following critical parameters:

• Number of Channels: Must be 4 channels
• Output Type: Must be transistor output
• Input Type: Must be DC
• Package / Case: Must be 16-SMD, Gull Wing
• Mounting Type: Must be Surface Mount
• Voltage - Isolation: Minimum 5000Vrms (ILQ5-X009 specifies 5300Vrms)
• Voltage - Output (Max): Minimum 70V
• Current - Output / Channel: Minimum 50mA
• RoHS Status: Must be ROHS3 Compliant

The LTV-846S meets all substitution criteria with compatible electrical and mechanical specifications.

Parameter Comparison

Engineering Selection Recommendations

The LTV-846S is a qualified substitute for the ILQ5-X009 based on the following factors:

Compliance and Availability: The LTV-846S is in active production status, whereas the ILQ5-X009 is obsolete. Both parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for new designs.

Electrical Compatibility: The LTV-846S meets or exceeds the critical electrical parameters of the ILQ5-X009. The isolation voltage of 5000Vrms is within acceptable tolerance of the original 5300Vrms specification. Output voltage capability (80V) and current per channel (50mA) are equivalent or superior. The lower Vce saturation voltage (200mV vs 400mV) in the LTV-846S represents improved performance characteristics.

Mechanical Compatibility: Both parts share identical package configuration (16-SMD, Gull Wing) and mounting type (Surface Mount), ensuring direct PCB layout compatibility without redesign.

Operating Temperature Consideration: The LTV-846S operating temperature range (-30°C ~ 100°C) is narrower than the ILQ5-X009 (-40°C ~ 100°C). Applications requiring operation below -30°C must evaluate alternative substitutes or retain the original part if available.

Timing Characteristics: The LTV-846S exhibits slower rise and fall times (4µs, 3µs vs 2.6µs, 2.2µs). Applications with timing-critical requirements must validate performance against circuit specifications.

Frequently Asked Questions (FAQ)

Q: Can the LTV-846S be used as a direct replacement for the ILQ5-X009 in existing designs?

A: The LTV-846S is mechanically and electrically compatible for most applications. Direct PCB substitution is possible due to identical 16-SMD, Gull Wing packaging. However, circuit validation is required for applications sensitive to timing characteristics or operating below -30°C.

Q: What are the key differences between these parts?

A: The primary differences are isolation voltage (5300Vrms vs 5000Vrms), rise/fall time performance (2.6µs/2.2µs vs 4µs/3µs), Vce saturation (400mV vs 200mV), and operating temperature range (-40°C to 100°C vs -30°C to 100°C). The LTV-846S offers superior saturation voltage performance but slower switching response.

Q: Is the lower isolation voltage of the LTV-846S acceptable?

A: The 5000Vrms isolation of the LTV-846S is within industry-standard tolerance for high-voltage isolation applications. Acceptance depends on circuit design margins and application safety requirements. Designs with specific isolation voltage requirements must be evaluated against the 300Vrms difference.

Q: Are both parts available in the same packaging options?

A: Yes. Both the ILQ5-X009 and LTV-846S use 16-SMD, Gull Wing surface mount packaging. No PCB layout modifications are required for mechanical substitution.

Q: What is the impact of the narrower operating temperature range of the LTV-846S?

A: The LTV-846S minimum operating temperature is -30°C compared to -40°C for the ILQ5-X009. Applications operating in environments below -30°C must either retain the original part or identify alternative substitutes with extended low-temperature ratings.

Q: How do the current transfer ratios compare?

A: The ILQ5-X009 specifies 50% to 400% CTR at 10mA input, while the LTV-846S specifies 50% to 600% CTR at 5mA input. The LTV-846S demonstrates higher current transfer efficiency, which may improve circuit performance in applications with limited input current availability.