ILCT6 Equivalent & Substitute Parts

Part Overview

The ILCT6 is a 2-channel optoisolator with transistor output manufactured by Vishay Semiconductor Opto Division. It provides 5300Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. Active alternatives with comparable electrical and mechanical specifications are available from manufacturers including onsemi and Fairchild Semiconductor.

Substiute Parts

ILCT6

Vishay Semiconductor Opto DivisionIn Stock: 2275ILCT6 Datasheet

Current PartRFQ

MCT6

onsemiIn Stock: 174365MCT6 Datasheet

MFR RecommendedRFQ

MCT6

onsemiIn Stock: 174365MCT6 Datasheet

MFR RecommendedRFQ

MCT61

Fairchild SemiconductorIn Stock: 2553MCT61 Datasheet

MFR RecommendedRFQ

MCT62

onsemiIn Stock: 5247MCT62 Datasheet

MFR RecommendedRFQ

MCT9001

onsemiIn Stock: 5059MCT9001 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ILCT6 is determined by the following critical parameters:

• Number of Channels: Must be 2
• Output Type: Must be Transistor
• Package / Case: Must be 8-DIP (0.300", 7.62mm)
• Mounting Type: Must be Through Hole
• Voltage - Isolation: Minimum 5000Vrms (ILCT6 specifies 5300Vrms; substitutes at 5000Vrms are acceptable as they meet or exceed typical application requirements)
• Current - Output / Channel: Must be 30mA
• Voltage - Output (Max): Must be minimum 30V
• Vce Saturation (Max): Must be 400mV or lower
• Operating Temperature Range: Must cover -55°C ~ 100°C
• Input Type: Must be DC

All substitute parts listed meet these core electrical and mechanical compatibility criteria. Current Transfer Ratio variations are acceptable provided the minimum specification is 20% or higher at the specified test current.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts are active products with current manufacturing support, addressing the obsolescence status of the ILCT6. Selection among substitutes should be based on the following factors:

MCT6 (onsemi): Active product with high inventory availability (174,300 pcs). Meets all core electrical specifications with 5000Vrms isolation. Faster switching times (2.4µs vs. 3µs) provide improved performance margin. ROHS3 compliant. Suitable for direct replacement in most applications.

MCT61 (Fairchild Semiconductor): Active product with moderate inventory (2,510 pcs). Specifies higher Current Transfer Ratio minimum (50% @ 5mA vs. 20% @ 10mA), providing improved gain characteristics. Faster switching times (2.4µs). Suitable where higher transfer ratio is beneficial.

MCT62 (onsemi): Active product with good inventory (5,232 pcs). Specifies highest Current Transfer Ratio minimum (100% @ 5mA), offering superior gain performance. Faster switching times (2.4µs). ROHS3 compliant. Recommended for applications requiring maximum transfer ratio.

MCT9001 (onsemi): Active product with good inventory (4,986 pcs). Provides highest maximum output voltage (55V vs. 30V), enabling use in higher voltage applications. Specifies wide Current Transfer Ratio range (50% to 600% @ 5mA). Switching times match ILCT6 (3µs). ROHS3 compliant. Suitable for applications requiring higher output voltage capability.

All substitutes maintain identical package footprint, mounting type, and operating temperature range, ensuring mechanical and thermal compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can MCT6, MCT61, MCT62, and MCT9001 be used interchangeably with ILCT6?

A: All four substitutes meet the core electrical and mechanical compatibility requirements: 2-channel transistor output, 8-DIP through-hole package, 30mA output current, 400mV maximum Vce saturation, and -55°C to 100°C operating range. Differences in Current Transfer Ratio, switching speed, and maximum output voltage do not prevent interchangeability in applications designed for ILCT6 specifications. Application-specific requirements may favor one substitute over others.

Q: What is the difference in isolation voltage between ILCT6 (5300Vrms) and the substitutes (5000Vrms)?

A: The ILCT6 specifies 5300Vrms isolation while all substitutes specify 5000Vrms. This 300Vrms difference represents a 5.7% reduction. For applications where isolation voltage is a critical design parameter, this difference must be evaluated against system requirements. For most standard applications, 5000Vrms isolation is functionally equivalent to 5300Vrms.

Q: How do switching times differ among these parts?

A: ILCT6 and MCT9001 specify 3µs turn-on and turn-off times. MCT6, MCT61, and MCT62 specify faster 2.4µs switching times. Faster switching provides improved performance margin and reduced propagation delay. Applications sensitive to switching speed should account for this 0.6µs difference.

Q: Which substitute offers the best Current Transfer Ratio performance?

A: MCT62 specifies the highest minimum Current Transfer Ratio at 100% @ 5mA. MCT61 and MCT9001 specify 50% @ 5mA. MCT6 specifies 20% @ 10mA, matching ILCT6. Higher Current Transfer Ratio indicates better optical coupling efficiency and improved noise immunity.

Q: Are all substitutes RoHS3 compliant?

A: MCT6, MCT62, and MCT9001 are explicitly ROHS3 compliant. MCT61 RoHS status is not specified in available documentation. For applications requiring RoHS3 compliance certification, MCT6, MCT62, or MCT9001 are recommended.

Q: Can MCT9001 be used in applications limited to 30V output voltage?

A: Yes. MCT9001 specifies 55V maximum output voltage, which exceeds the 30V requirement. The higher voltage rating does not prevent use in 30V applications; it provides additional design margin and flexibility for future applications requiring higher output voltage.

Q: What is the package footprint compatibility?

A: All parts use identical 8-DIP (0.300", 7.62mm) through-hole package. PCB layouts designed for ILCT6 require no modification for any of the listed substitutes. Pin-to-pin compatibility is maintained across all alternatives.