ISD74SM Equivalent & Substitute Parts

Part Overview

The ISD74SM is an optoisolator transistor output device manufactured by Isocom Components 2004 LTD, designed for high-voltage isolation applications. This component features a single channel with 5300Vrms isolation rating and transistor output with base connection. The part is currently in active production status with 656 units available in inventory. Alternative components may be required due to supply constraints, design revisions, or specific packaging preferences while maintaining electrical and mechanical compatibility.

Substiute Parts

ISD74SM

Isocom Components 2004 LTDIn Stock: 741ISD74SM Datasheet

Current PartRFQ

IS74XSM

Isocom Components 2004 LTDIn Stock: 1005IS74XSM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISD74SM is determined by strict equivalence across the following critical parameters:

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

The IS74XSM meets all specified electrical and mechanical parameters and qualifies as a parametric equivalent substitute for the ISD74SM.

Parameter Comparison

Engineering Selection Recommendations

Both the ISD74SM and IS74XSM are active production components from Isocom Components 2004 LTD with identical electrical specifications and mechanical compatibility. Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The IS74XSM offers higher inventory availability at 951 units compared to 656 units for the ISD74SM. Selection between these parts should be based on supply chain requirements and design documentation specifications, as both components are functionally equivalent for applications requiring single-channel optoisolation at 5300Vrms with transistor output configuration.

Frequently Asked Questions (FAQ)

Q: Can IS74XSM be used as a direct replacement for ISD74SM?

A: Yes. The IS74XSM meets all electrical and mechanical parameters specified for the ISD74SM, including isolation voltage, current transfer ratio, output voltage and current ratings, operating temperature range, and package configuration. Both components are manufactured by Isocom Components 2004 LTD and maintain identical compliance certifications.

Q: Are there any package differences between ISD74SM and IS74XSM?

A: Both components use 6-SMD, Gull Wing surface mount packaging. No package modifications are required for substitution.

Q: What are the critical parameters that determine substitution eligibility?

A: Substitution eligibility is determined by equivalence in isolation voltage (5300Vrms), number of channels (1), current transfer ratio minimum (12.5% @ 16mA), output type (transistor with base), maximum output voltage (50V), maximum output current per channel (50mA), forward voltage (1.2V typical), maximum forward current (50mA), operating temperature range (-25°C to 100°C), mounting type (surface mount), package configuration (6-SMD, Gull Wing), and compliance status (ROHS3 compliant, REACH unaffected).

Q: Do both parts have the same compliance certifications?

A: Yes. Both ISD74SM and IS74XSM are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory standards.

Q: Which part should be selected based on availability?

A: The IS74XSM currently has higher inventory availability at 951 units compared to 656 units for the ISD74SM. Selection should align with supply chain planning and design documentation requirements.