ISP521-2BLSM Equivalent & Substitute Parts

Part Overview

The ISP521-2BLSM 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 in active production status with 743 units in stock. Substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and regulatory compliance to support component procurement flexibility and supply chain continuity.

Substiute Parts

ISP521-2BLSM

Isocom Components 2004 LTDIn Stock: 813ISP521-2BLSM Datasheet

Current PartRFQ

ISP521-2XBLSM

Isocom Components 2004 LTDIn Stock: 1296ISP521-2XBLSM Datasheet

Parametric EquivalentRFQ

TLP521-2XBLSM

Isocom Components 2004 LTDIn Stock: 1021TLP521-2XBLSM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISP521-2BLSM are qualified based on the following critical parameters that determine functional and mechanical compatibility:

• Number of Channels: 2 channels (dual-channel configuration)
• Voltage - Isolation: 5300Vrms (galvanic isolation rating)
• Current Transfer Ratio: 200% minimum and 600% maximum @ 1mA (optical coupling efficiency)
• Output Type: Transistor output (not photodiode or other output types)
• Voltage - Output (Max): 55V (maximum collector-emitter voltage)
• Current - Output / Channel: 50mA (maximum output current per channel)
• Vce Saturation (Max): 400mV (saturation voltage specification)
• Package / Case: 8-SMD, Gull Wing (surface-mount footprint compatibility)
• Operating Temperature: -30°C ~ 100°C (thermal operating range)
• RoHS Status: ROHS3 Compliant (regulatory compliance)

All identified substitute parts match these parameters exactly, ensuring direct functional and mechanical interchangeability in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—ISP521-2BLSM, ISP521-2XBLSM, and TLP521-2XBLSM—are active production components with identical electrical and mechanical specifications. Selection between these parts should be based on:

Product Status and Availability: All parts maintain active production status and ROHS3 compliance, ensuring long-term supply viability and regulatory adherence for new designs and production runs.

Inventory Considerations: ISP521-2XBLSM offers the highest inventory level at 1243 units, followed by TLP521-2XBLSM at 947 units, and ISP521-2BLSM at 743 units. Inventory levels support procurement decisions for volume requirements and lead-time mitigation.

Compliance and Certifications: All parts carry identical ROHS3 compliance, MSL Level 1 (Unlimited), REACH Unaffected status, and ECCN/HTSUS classifications, ensuring regulatory compatibility across all three options for applications subject to environmental and trade compliance requirements.

Frequently Asked Questions (FAQ)

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

A: Yes. ISP521-2XBLSM is a parametric equivalent with identical electrical characteristics, isolation voltage, current transfer ratio, output specifications, and package configuration. Direct substitution is supported without circuit modification.

Q: What is the difference between ISP521-2BLSM and TLP521-2XBLSM?

A: Both parts share identical electrical and mechanical parameters, including isolation voltage, channel count, output current, and package type. The primary difference is the series designation (ISP521-2 versus TLP521-2), which reflects different product lines from the same manufacturer. Both are functionally interchangeable.

Q: Are all three parts compatible with the same PCB footprint?

A: Yes. All three parts use the 8-SMD, Gull Wing package configuration, ensuring identical land pattern compatibility and PCB assembly without layout modifications.

Q: Do these parts require different handling or storage procedures?

A: No. All three parts carry MSL Level 1 (Unlimited) moisture sensitivity rating, indicating no moisture-related storage restrictions. Standard component handling and storage practices apply uniformly across all three parts.

Q: Can these parts be mixed in the same production batch?

A: Yes. Since all three parts are parametrically equivalent with identical electrical specifications and package configuration, they can be used interchangeably within the same circuit design and production environment without performance or reliability impact.

Q: What compliance certifications apply to all substitute parts?

A: All three parts are ROHS3 compliant, REACH unaffected, and classified under ECCN EAR99 and HTSUS 8541.49.8000, ensuring uniform regulatory compliance for applications subject to environmental and trade regulations.