ISP521-2 Equivalent & Substitute Parts

Part Overview

The ISP521-2 is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This dual-channel device provides 5300Vrms isolation and is designed for applications requiring galvanic isolation with transistor-switched outputs. The part is currently active in production with 1925 units in stock. Substitute parts are identified when inventory constraints, lead time requirements, or supply chain considerations necessitate alternative sourcing while maintaining identical electrical and mechanical specifications.

Substiute Parts

ISP521-2

Isocom Components 2004 LTDIn Stock: 2024ISP521-2 Datasheet

Current PartRFQ

ISP521-2X

Isocom Components 2004 LTDIn Stock: 1330ISP521-2X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the ISP521-2 is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part ISP521-2X maintains identical specifications in the following key areas:

• Dual-channel configuration with 5300Vrms isolation voltage
• Current transfer ratio range: 50% to 600% @ 5mA
• Transistor output with 55V maximum output voltage and 50mA per-channel current rating
• Vce saturation maximum of 400mV
• Rise and fall times of 4µs and 3µs respectively
• Operating temperature range of -30°C to 100°C
• 8-DIP through-hole package (0.300", 7.62mm)
• Identical compliance certifications: ROHS3, MSL 1, REACH Unaffected

The ISP521-2X is classified as a parametric equivalent, sharing the same series designation and offering direct pin-for-pin compatibility with identical electrical performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

Both ISP521-2 and ISP521-2X are active products with identical electrical specifications and compliance certifications. Selection between these parts is based on availability and supply chain requirements rather than technical differentiation. The ISP521-2 currently maintains higher inventory (1925 units) compared to ISP521-2X (1227 units). Both parts meet ROHS3 compliance requirements and carry MSL 1 rating, indicating no moisture sensitivity constraints during storage and handling. The through-hole 8-DIP package format ensures compatibility with standard PCB assembly processes for both variants.

Frequently Asked Questions (FAQ)

Q: Can ISP521-2X be used as a direct replacement for ISP521-2?

A: Yes. The ISP521-2X is a parametric equivalent with identical electrical characteristics, pin configuration, and package specifications. No circuit modifications are required for substitution.

Q: Are there differences in isolation voltage between these parts?

A: No. Both ISP521-2 and ISP521-2X provide 5300Vrms isolation voltage with identical current transfer ratio specifications.

Q: Do both parts support the same operating temperature range?

A: Yes. Both parts operate across -30°C to 100°C with identical rise and fall time characteristics of 4µs and 3µs respectively.

Q: Are there package or mounting differences?

A: No. Both parts use the 8-DIP through-hole package with 0.300" (7.62mm) spacing. PCB layout and assembly processes remain unchanged.

Q: What compliance certifications apply to both parts?

A: Both ISP521-2 and ISP521-2X are ROHS3 compliant, carry MSL 1 rating (unlimited moisture sensitivity), and are REACH unaffected.

Q: Is there a performance difference in output current capability?

A: No. Both parts deliver 50mA maximum current per channel with identical 400mV Vce saturation characteristics and 55V maximum output voltage.