ISP521-2BLSMT&R Equivalent & Substitute Parts

Part Overview

The ISP521-2BLSMT&R 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 746 units available in inventory. Substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and compliance certifications to ensure direct interchangeability in circuit designs.

Substiute Parts

ISP521-2BLSMT&R

Isocom Components 2004 LTDIn Stock: 808ISP521-2BLSMT&R Datasheet

Current PartRFQ

ISP521-2XBLSMT&R

Isocom Components 2004 LTDIn Stock: 2043ISP521-2XBLSMT&R Datasheet

Parametric EquivalentRFQ

TLP521-2XBLSMT&R

Isocom Components 2004 LTDIn Stock: 1831TLP521-2XBLSMT&R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISP521-2BLSMT&R are qualified based on the following critical parameters that determine functional interchangeability:

• Number of Channels: 2 channels (dual configuration)
• Voltage - Isolation: 5300Vrms minimum
• Current Transfer Ratio: 200% minimum @ 1mA
• Output Type: Transistor output
• Voltage - Output (Max): 55V or greater
• Current - Output / Channel: 50mA or greater
• Package / Case: 8-SMD, Gull Wing
• Mounting Type: Surface Mount
• Operating Temperature Range: -30°C ~ 100°C or wider
• Compliance: ROHS3 Compliant, MSL 1

All identified substitutes maintain these electrical and mechanical specifications, ensuring direct replacement capability in existing circuit designs without modification to PCB layout or component footprint.

Parameter Comparison

Engineering Selection Recommendations

All three optoisolator models—ISP521-2BLSMT&R, ISP521-2XBLSMT&R, and TLP521-2XBLSMT&R—are active production components with full ROHS3 compliance and MSL 1 rating. They are electrically and mechanically interchangeable for applications requiring dual-channel transistor output optoisolation at 5300Vrms isolation voltage.

Selection between these parts should be based on availability and supply chain requirements. The ISP521-2XBLSMT&R variant offers higher inventory (2023 units) compared to the primary part (746 units), while the TLP521-2XBLSMT&R series provides 1821 units in stock. All parts meet identical electrical specifications and compliance requirements, making them suitable for direct substitution in existing designs.

Frequently Asked Questions (FAQ)

Q: Can ISP521-2XBLSMT&R be used as a direct replacement for ISP521-2BLSMT&R?

A: Yes. Both parts are manufactured by Isocom Components 2004 LTD and share identical electrical parameters, isolation voltage, current transfer ratios, output specifications, and package configuration. The X variant designation indicates a product line extension with equivalent performance characteristics.

Q: Is TLP521-2XBLSMT&R compatible with ISP521-2BLSMT&R in the same circuit?

A: Yes. The TLP521-2XBLSMT&R maintains all critical electrical specifications including 5300Vrms isolation, dual-channel transistor output, 50mA per-channel current capability, and 8-SMD gull wing package. No circuit modifications are required for substitution.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by matching: number of channels (2), isolation voltage (5300Vrms), current transfer ratio range (200-600% @ 1mA), output type (transistor), maximum output voltage (55V), per-channel current (50mA), package type (8-SMD gull wing), and operating temperature range (-30°C to 100°C).

Q: Are all three parts ROHS3 compliant?

A: Yes. ISP521-2BLSMT&R, ISP521-2XBLSMT&R, and TLP521-2XBLSMT&R are all ROHS3 compliant with MSL 1 rating, suitable for unrestricted moisture exposure during storage and handling.

Q: Can these parts be used interchangeably on the same PCB assembly?

A: Yes. All three parts use identical 8-SMD gull wing surface-mount packaging with the same footprint and pin configuration, allowing direct PCB-level substitution without layout modifications.