ISP521-2SM Equivalent & Substitute Parts

Part Overview

The ISP521-2SM is a dual-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This surface-mount component provides galvanic isolation up to 5300Vrms and is designed for applications requiring electrical isolation between input and output circuits. The part is currently active in production with 3652 units in stock. Substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and regulatory compliance to support component availability and supply chain flexibility.

Substiute Parts

ISP521-2SM

Isocom Components 2004 LTDIn Stock: 3680ISP521-2SM Datasheet

Current PartRFQ

ISP521-2XSM

Isocom Components 2004 LTDIn Stock: 1239ISP521-2XSM Datasheet

Parametric EquivalentRFQ

ISP621-2XGRSM

Isocom Components 2004 LTDIn Stock: 1022ISP621-2XGRSM Datasheet

Parametric EquivalentRFQ

ISP621-2XSM

Isocom Components 2004 LTDIn Stock: 1044ISP621-2XSM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISP521-2SM are qualified based on the following criteria:

Electrical Parameters (Must Match):

• Number of Channels: 2
• Voltage - Isolation: 5300Vrms
• Current Transfer Ratio (Min): 50% @ 5mA
• Current Transfer Ratio (Max): 600% @ 5mA
• Output Type: Transistor
• Voltage - Output (Max): 55V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV
• Rise / Fall Time (Typ): 4µs, 3µs
• Input Type: DC
• Operating Temperature: -30°C ~ 100°C

Mechanical Parameters (Must Match):

• Package / Case: 8-SMD, Gull Wing
• Mounting Type: Surface Mount
• Supplier Device Package: 8-SMD

Regulatory & Compliance (Must Match):

• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• REACH Status: REACH Unaffected

All identified substitute parts meet these criteria and are manufactured by Isocom Components 2004 LTD with active product status.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed are manufactured by Isocom Components 2004 LTD with active product status. Selection between ISP521-2SM and its substitutes (ISP521-2XSM, ISP621-2XGRSM, ISP621-2XSM) is based on availability and supply chain requirements, as all parts meet identical electrical and mechanical specifications.

All parts maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory compatibility across applications. Moisture sensitivity level MSL 1 (Unlimited) indicates no special storage or handling requirements for any of these components.

The ISP521-2SM offers the highest current inventory at 3652 units. Alternative part numbers provide additional sourcing options with comparable stock levels: ISP521-2XSM (1145 units), ISP621-2XGRSM (921 units), and ISP621-2XSM (957 units).

Frequently Asked Questions (FAQ)

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

A: Yes. ISP521-2XSM is a parametric equivalent with identical electrical characteristics, isolation voltage, current transfer ratio, output specifications, and package configuration. Both parts are manufactured by Isocom Components 2004 LTD and share the same series designation ISP521-2.

Q: What is the difference between ISP521-2 and ISP621-2 series parts?

A: Based on provided specifications, ISP521-2XSM and ISP621-2XGRSM / ISP621-2XSM are parametric equivalents with matching electrical performance, isolation voltage, channel count, output type, and thermal characteristics. The series designation difference reflects manufacturer product line organization but does not indicate functional differences for the specified parameters.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All parts use identical 8-SMD Gull Wing package configuration with surface-mount technology. PCB footprints and reflow soldering profiles remain compatible across ISP521-2SM, ISP521-2XSM, ISP621-2XGRSM, and ISP621-2XSM.

Q: Do these parts require special handling or storage conditions?

A: No. All parts have Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture-related storage restrictions or special handling procedures are required.

Q: Are all substitute parts RoHS and REACH compliant?

A: Yes. All parts are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and use.

Q: Which part should be selected based on availability?

A: Selection depends on current inventory requirements. ISP521-2SM has the highest stock level at 3652 units. For alternative sourcing, ISP521-2XSM (1145 units), ISP621-2XSM (957 units), and ISP621-2XGRSM (921 units) provide equivalent functionality with varying availability.