IS74 Optoisolator Transistor Equivalent & Substitute Parts

Part Overview

The IS74 is an optoisolator transistor with base output manufactured by Isocom Components 2004 LTD. This 6-pin high-density transistor detector provides galvanic isolation rated at 5300Vrms with a single channel configuration. The device is currently in active production status with 905 units in stock. Alternative part numbers become necessary when addressing supply chain constraints, inventory availability, or specific procurement requirements while maintaining identical electrical and mechanical specifications.

Substiute Parts

IS74

Isocom Components 2004 LTDIn Stock: 932IS74 Datasheet

Current PartRFQ

IS74X

Isocom Components 2004 LTDIn Stock: 1214IS74X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The IS74X qualifies as a parametric equivalent to the IS74 based on strict alignment across all critical electrical and mechanical parameters. Substitution eligibility is determined by the following key parameters:

• Voltage - Isolation: 5300Vrms (identical)
• Current Transfer Ratio (Min): 12.5% @ 16mA (identical)
• Output Type: Transistor with Base (identical)
• Voltage - Output (Max): 50V (identical)
• Current - Output / Channel: 50mA (identical)
• Package / Case: 6-DIP (0.300", 7.62mm) (identical)
• Operating Temperature: -25°C ~ 100°C (identical)
• RoHS Status: ROHS3 Compliant (identical)

All parameters match without deviation, establishing full parametric equivalence between IS74 and IS74X.

Parameter Comparison

Engineering Selection Recommendations

Both IS74 and IS74X are active production components manufactured by Isocom Components 2004 LTD with identical compliance certifications. The IS74X carries higher inventory availability (1151 units) compared to IS74 (905 units), making it suitable for procurement scenarios requiring expedited delivery or larger volume requirements. Both parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment for industrial and commercial applications. Selection between these parts should be based on inventory availability and supply chain logistics rather than electrical or mechanical performance criteria.

Frequently Asked Questions (FAQ)

Q: Can IS74X be used as a direct replacement for IS74?

A: Yes. The IS74X is a parametric equivalent with identical electrical specifications, isolation voltage, output characteristics, and package configuration. Direct pin-for-pin substitution is supported without circuit modification.

Q: Are there any differences in isolation voltage between IS74 and IS74X?

A: No. Both parts provide 5300Vrms isolation voltage with identical current transfer ratio specifications of 12.5% @ 16mA.

Q: Do both parts use the same package and mounting type?

A: Yes. Both IS74 and IS74X use 6-DIP (0.300", 7.62mm) through-hole packaging with identical pin configurations and mechanical dimensions.

Q: Are there compliance or certification differences?

A: No. Both parts carry identical RoHS3 compliance status, REACH unaffected designation, and moisture sensitivity level (MSL 1 - Unlimited).

Q: What is the primary reason to select IS74X over IS74?

A: Inventory availability. IS74X has 1151 units in stock compared to 905 units for IS74, making it preferable for supply chain continuity and volume procurement scenarios.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. The identical electrical and mechanical specifications ensure full interchangeability without design modifications or re-qualification requirements.