ISD5X Optoisolator - Equivalent & Substitute Parts

Part Overview

The ISD5X is an active optoisolator manufactured by Isocom Components 2004 LTD, designed for high-voltage isolation applications requiring transistor output switching. This 2-channel device provides 5300Vrms isolation rating in an 8-DIP through-hole package. The product is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts may be required due to inventory constraints, application-specific channel requirements, or design optimization for lower isolation voltage applications where full 5300Vrms capability is not necessary.

Substiute Parts

ISD5X

Isocom Components 2004 LTDIn Stock: 1330ISD5X Datasheet

Current PartRFQ

ILD5

Isocom Components 2004 LTDIn Stock: 1802ILD5 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The ILD5 is qualified as a direct substitute for the ISD5X based on the following electrical and mechanical compatibility criteria:

Matching Parameters:

• Output Type: Transistor (both devices)
• Voltage - Output (Max): 70V (both devices)
• Current - Output / Channel: 50mA (both devices)
• Current Transfer Ratio (Min): 50% @ 10mA (both devices)
• Current Transfer Ratio (Max): 400% @ 10mA (both devices)
• Package / Case: 8-DIP (0.300", 7.62mm) (both devices)
• Operating Temperature: -25°C ~ 100°C (both devices)
• Mounting Type: Through Hole (both devices)
• Input Type: DC (both devices)
• Manufacturer: Isocom Components 2004 LTD (both devices)
• RoHS Status: ROHS3 Compliant (both devices)
• Moisture Sensitivity Level: 1 (Unlimited) (both devices)

Key Difference: The ILD5 is a single-channel device with 7.5Vpk isolation rating, compared to the ISD5X's 2-channel configuration with 5300Vrms isolation. Substitution is valid only in applications where single-channel operation and lower isolation voltage requirements are acceptable.

Parameter Comparison

Engineering Selection Recommendations

Both the ISD5X and ILD5 maintain active production status with full RoHS3 compliance and REACH unaffected certification. Selection between these devices depends on application requirements:

Select ISD5X when:

• Two independent isolation channels are required
• High isolation voltage of 5300Vrms is specified
• Dual-channel switching or signal isolation is necessary

Select ILD5 when:

• Single-channel isolation is sufficient
• Lower isolation voltage of 7.5Vpk meets application requirements
• Space or cost optimization favors single-channel configuration
• Faster switching response (2µs rise/fall time vs. 2.6µs/2.2µs) is beneficial

Both devices share identical output current capability (50mA per channel), maximum output voltage (70V), current transfer ratio range (50% to 400% @ 10mA), and operating temperature range (-25°C to 100°C). The 8-DIP through-hole package is identical, enabling direct PCB footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can ILD5 replace ISD5X in all applications?

A: No. The ILD5 is a single-channel device with 7.5Vpk isolation, while the ISD5X provides 2 channels with 5300Vrms isolation. Substitution is valid only when single-channel operation and lower isolation voltage are acceptable for the application.

Q: Are the package dimensions identical?

A: Yes. Both devices use the 8-DIP (0.300", 7.62mm) through-hole package with identical pin spacing and mounting requirements. PCB footprints are directly compatible.

Q: Do both devices have the same output current rating?

A: Yes. Both the ISD5X and ILD5 support 50mA maximum output current per channel and 70V maximum output voltage.

Q: What is the difference in switching speed?

A: The ILD5 has slightly faster rise and fall times (2µs each) compared to the ISD5X (2.6µs rise, 2.2µs fall). This difference is negligible for most applications but may be relevant in high-frequency switching scenarios.

Q: Are both devices RoHS3 compliant?

A: Yes. Both the ISD5X and ILD5 are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1).

Q: What is the key parameter difference for substitution decisions?

A: The primary differences are channel count (2 vs. 1) and isolation voltage rating (5300Vrms vs. 7.5Vpk). All other electrical and mechanical parameters are identical or equivalent.