IS74G Optoisolator Equivalent & Substitute Parts

Part Overview

The IS74G is an optoisolator transistor detector manufactured by Isocom Components 2004 LTD, designed for high-density isolation applications. This 6-pin DIP component provides galvanic isolation with a 5300Vrms rating and transistor output with base connection capability. The part is currently in active production status with 680 units available in stock. Substitute parts are identified when identical electrical and mechanical parameters are maintained across isolation voltage, current transfer ratio, output specifications, and package configuration.

Substiute Parts

IS74G

Isocom Components 2004 LTDIn Stock: 693IS74G Datasheet

Current PartRFQ

IS74XG

Isocom Components 2004 LTDIn Stock: 838IS74XG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the IS74G is determined by strict equivalence across the following critical parameters:

• Isolation voltage rating: 5300Vrms
• Number of channels: 1
• Output configuration: Transistor with Base
• Maximum output voltage: 50V
• Maximum output current per channel: 50mA
• Current transfer ratio minimum: 12.5% @ 16mA
• Package type: 6-DIP (0.400", 10.16mm)
• Mounting method: Through Hole
• Input type: DC
• Operating temperature range: -25°C ~ 100°C

Parts meeting all these specifications are classified as parametric equivalents and may be used interchangeably in circuit designs where the IS74G is specified.

Parameter Comparison

Engineering Selection Recommendations

The IS74XG is a parametric equivalent to the IS74G. Both components maintain identical electrical specifications, package configuration, and compliance certifications. Selection between these parts may be based on inventory availability and lead time considerations. The IS74G currently has 680 units in stock, while the IS74XG has 793 units available. Both parts carry ROHS3 compliance and REACH unaffected status, making them suitable for applications requiring environmental regulatory adherence.

Frequently Asked Questions (FAQ)

Q: Can IS74XG replace IS74G in existing designs? A: Yes. The IS74XG meets all electrical and mechanical specifications of the IS74G, including isolation voltage, current transfer ratio, output ratings, and 6-DIP package configuration. Direct substitution is supported.

Q: Are there differences in isolation voltage between these parts? A: No. Both IS74G and IS74XG provide 5300Vrms isolation voltage rating.

Q: Do these parts have identical package dimensions? A: Yes. Both components use 6-DIP (0.400", 10.16mm) through-hole packaging with identical pin configurations.

Q: What is the current transfer ratio specification? A: Both parts specify a minimum current transfer ratio of 12.5% at 16mA input current.

Q: Are both parts RoHS compliant? A: Yes. Both IS74G and IS74XG are ROHS3 compliant and REACH unaffected.

Q: What is the maximum output current rating? A: Both parts support a maximum output current of 50mA per channel.

Q: Do these optoisolators support base output control? A: Yes. Both parts feature transistor output with base connection, allowing external base drive control.