ISP321-1 Equivalent & Substitute Parts

Part Overview

The ISP321-1 is an optoisolator with transistor output, designed for single-channel isolation applications requiring high voltage isolation. Manufactured by Isocom Components 2004 LTD, this component operates at 5300Vrms isolation voltage with a 4-DIP through-hole package. The part is currently active in production with 1562 units in stock. Substitute parts may be required due to inventory constraints, regional availability, or supply chain optimization while maintaining identical electrical and mechanical specifications.

Substiute Parts

ISP321-1

Isocom Components 2004 LTDIn Stock: 1653ISP321-1 Datasheet

Current PartRFQ

ISP321-1X

Isocom Components 2004 LTDIn Stock: 857ISP321-1X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The ISP321-1X qualifies as a parametric equivalent substitute based on identical specifications across all critical electrical and mechanical parameters. Substitution is valid when the following parameters match exactly:

• Voltage - Isolation: 5300Vrms
• Number of Channels: 1
• Current Transfer Ratio range: 50% to 600% @ 5mA
• Output Type: Transistor
• Voltage - Output (Max): 80V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV
• Operating Temperature: -30°C ~ 100°C
• Package / Case: 4-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

The ISP321-1X maintains identical series designation, compliance certifications, and functional characteristics, confirming direct substitutability in applications requiring the ISP321-1.

Parameter Comparison

Engineering Selection Recommendations

Both ISP321-1 and ISP321-1X are active production parts manufactured by Isocom Components 2004 LTD with identical electrical and mechanical specifications. Selection between these parts is based on availability and supply chain requirements rather than technical differentiation.

ISP321-1 carries 1562 units in current inventory, while ISP321-1X maintains 831 units. Both parts comply with ROHS3 standards and are REACH unaffected, meeting regulatory requirements for industrial and commercial applications. The 4-DIP through-hole package ensures compatibility with standard PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can ISP321-1X replace ISP321-1 in existing designs?

A: Yes. The ISP321-1X is a parametric equivalent with identical isolation voltage (5300Vrms), current transfer ratio (50-600% @ 5mA), output characteristics (80V max, 50mA per channel), and 4-DIP package specifications. No circuit modifications are required.

Q: Are there differences in package dimensions between ISP321-1 and ISP321-1X?

A: No. Both parts use the 4-DIP (0.300", 7.62mm) package with through-hole mounting. PCB footprints and assembly processes remain unchanged.

Q: Do both parts meet the same compliance standards?

A: Yes. ISP321-1 and ISP321-1X are both ROHS3 compliant, REACH unaffected, and classified as MSL 1 (Unlimited moisture sensitivity level). Regulatory requirements are identical.

Q: What is the operating temperature range for these optoisolators?

A: Both ISP321-1 and ISP321-1X operate across -30°C to 100°C, supporting industrial and commercial temperature environments.

Q: Are there any electrical performance differences between the two part numbers?

A: No. Isolation voltage, current transfer ratio, output voltage, saturation voltage, and all other electrical parameters are identical between ISP321-1 and ISP321-1X.