IS74SM Optoisolator Equivalent & Substitute Parts

Part Overview

The IS74SM is an active optoisolator transistor detector manufactured by Isocom Components 2004 LTD. This 6-pin surface mount component provides galvanic isolation with a 5300Vrms rating and single-channel transistor output with base connection. The device is classified as Active product status with full ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when inventory constraints, supply chain disruptions, or procurement requirements necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

IS74SM

Isocom Components 2004 LTDIn Stock: 1225IS74SM Datasheet

Current PartRFQ

IS74XSM

Isocom Components 2004 LTDIn Stock: 1005IS74XSM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the IS74SM are identified based on strict parametric equivalence across all critical electrical and mechanical specifications. The substitution logic is based on the following key parameters that must match identically:

• Voltage - Isolation: 5300Vrms
• Number of Channels: 1
• Output Type: Transistor with Base
• Current Transfer Ratio (Min): 12.5% @ 16mA
• Rise / Fall Time (Typ): 2.6µs, 2.2µs
• Voltage - Output (Max): 50V
• Current - Output / Channel: 50mA
• Voltage - Forward (Vf) (Typ): 1.2V
• Current - DC Forward (If) (Max): 50mA
• Operating Temperature: -25°C ~ 100°C
• Package / Case: 6-SMD, Gull Wing
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

Both the IS74SM and IS74XSM are Active product status components manufactured by Isocom Components 2004 LTD. Both parts carry identical ROHS3 compliance certification and REACH Unaffected status, confirming regulatory alignment for industrial and commercial applications. The IS74XSM functions as a direct parametric equivalent with no electrical or mechanical differentiation. Selection between these parts may be based on inventory availability, procurement lead times, or supply chain logistics, as all technical specifications and compliance certifications are equivalent.

Frequently Asked Questions (FAQ)

Q: Can IS74XSM replace IS74SM in existing designs? A: Yes. The IS74XSM is a parametric equivalent with identical electrical specifications, isolation voltage, output characteristics, and package configuration. No circuit redesign or board layout modification is required.

Q: Are there any differences in isolation voltage between these parts? A: No. Both parts provide 5300Vrms isolation voltage with identical single-channel transistor output architecture.

Q: Do both parts meet the same compliance standards? A: Yes. Both IS74SM and IS74XSM are ROHS3 compliant with REACH Unaffected status and MSL 1 (Unlimited) moisture sensitivity rating.

Q: What is the package configuration for both parts? A: Both parts use 6-SMD, Gull Wing surface mount packaging suitable for automated assembly processes.

Q: Are the current transfer ratios identical? A: Yes. Both parts specify a minimum current transfer ratio of 12.5% at 16mA input current.

Q: Can these parts be used interchangeably in high-temperature applications? A: Yes. Both parts operate across the identical temperature range of -25°C to 100°C.