ISP621-2 Equivalent & Substitute Parts

Part Overview

The ISP621-2 is an optoisolator with transistor output, dual channel configuration in 8-DIP package. This component provides galvanic isolation up to 5300Vrms between input and output circuits. The part is currently active in production with full inventory availability. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required for design flexibility, supply chain continuity, or inventory optimization.

Substiute Parts

ISP621-2

Isocom Components 2004 LTDIn Stock: 838ISP621-2 Datasheet

Current PartRFQ

ISP621-2X

Isocom Components 2004 LTDIn Stock: 1029ISP621-2X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISP621-2 is determined by strict equivalence across the following critical parameters:

• Number of Channels: 2
• Voltage - Isolation: 5300Vrms
• Current Transfer Ratio range: 100% to 600% @ 5mA
• Output Type: Transistor
• Maximum Output Voltage: 55V
• Maximum Output Current per Channel: 50mA
• Vce Saturation: 400mV maximum
• Operating Temperature Range: -30°C to 100°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

The ISP621-2X meets all these criteria and is classified as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

Both ISP621-2 and ISP621-2X are active production parts manufactured by Isocom Components 2004 LTD with identical electrical and mechanical specifications. Both parts are ROHS3 compliant and carry equivalent regulatory status. Selection between these parts may be based on inventory availability, lead time, or supply chain requirements. The ISP621-2X currently maintains higher inventory levels (930 pcs vs 771 pcs), which may influence procurement decisions for high-volume applications.

Frequently Asked Questions (FAQ)

Q: Can ISP621-2X be used as a direct replacement for ISP621-2?

A: Yes. The ISP621-2X is a parametric equivalent with identical electrical performance, isolation voltage, output characteristics, and 8-DIP package configuration. No circuit modifications are required.

Q: Are there any differences in compliance or certifications between these parts?

A: No. Both parts carry identical RoHS3 compliance status and regulatory certifications (REACH Unaffected, ECCN EAR99).

Q: What determines substitution eligibility for optoisolators in this series?

A: Substitution requires matching channel count, isolation voltage, current transfer ratio range, output type, maximum output voltage and current, saturation voltage, operating temperature range, and package type. All these parameters are identical between ISP621-2 and ISP621-2X.

Q: Are there any thermal or environmental considerations when selecting between these parts?

A: Both parts operate across the same temperature range (-30°C to 100°C) and carry identical moisture sensitivity level (MSL 1 - Unlimited). Environmental performance is equivalent.

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

A: Yes. Identical 8-DIP through-hole package dimensions (0.300", 7.62mm) ensure direct PCB compatibility without layout modifications.