TLP521-2SM Equivalent & Substitute Parts

Part Overview

The TLP521-2SM is a dual-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 8-pin surface mount device provides 5300Vrms isolation voltage and is designed for applications requiring galvanic isolation between input and output circuits. The part is currently active in production with 1124 units in stock. Substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and compliance certifications to ensure direct interchangeability in circuit designs.

Substiute Parts

TLP521-2SM

Isocom Components 2004 LTDIn Stock: 1185TLP521-2SM 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 TLP521-2SM are qualified based on the following critical parameters that determine functional interchangeability:

• Number of Channels: 2 channels (dual configuration)
• Voltage - Isolation: 5300Vrms
• Current Transfer Ratio: 50% (Min) @ 5mA and 600% (Max) @ 5mA
• Output Type: Transistor output
• Voltage - Output (Max): 55V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV
• Rise / Fall Time (Typ): 4µs, 3µs
• Package / Case: 8-SMD, Gull Wing
• Operating Temperature: -30°C ~ 100°C
• Compliance: ROHS3 Compliant, REACH Unaffected

All substitute parts listed maintain identical electrical performance specifications and mechanical compatibility with the TLP521-2SM.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed—ISP521-2XSM, ISP621-2XGRSM, and ISP621-2XSM—are direct parametric equivalents to the TLP521-2SM. Selection among these parts may be based on:

• Availability: Current inventory levels vary (TLP521-2SM: 1124 units; ISP521-2XSM: 1145 units; ISP621-2XGRSM: 921 units; ISP621-2XSM: 957 units)
• Compliance Status: All parts maintain ROHS3 compliance and REACH unaffected status
• Series Designation: ISP521-2 series and ISP621-2 series represent different product lines within the same manufacturer's optoisolator portfolio

All parts are suitable for direct substitution in applications requiring dual-channel optoisolation with 5300Vrms isolation voltage and transistor output configuration.

Frequently Asked Questions (FAQ)

Q: Can ISP521-2XSM be used as a direct replacement for TLP521-2SM?

A: Yes. The ISP521-2XSM maintains identical electrical specifications, isolation voltage, current transfer ratio, output characteristics, and package configuration. Both are 8-SMD, Gull Wing surface mount devices with matching operating temperature ranges and compliance certifications.

Q: What is the difference between ISP621-2XGRSM and ISP621-2XSM?

A: Both ISP621-2XGRSM and ISP621-2XSM share identical electrical and mechanical parameters. The part number suffix variation reflects packaging or manufacturing designation within the ISP621-2 series but does not affect functional interchangeability with the TLP521-2SM.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. TLP521-2SM and all listed substitute parts (ISP521-2XSM, ISP621-2XGRSM, ISP621-2XSM) are ROHS3 compliant and REACH unaffected.

Q: Can these parts be used in high-temperature applications?

A: All parts operate within the temperature range of -30°C to 100°C. Applications requiring operation outside this range require alternative component selection.

Q: Is the 8-SMD, Gull Wing package compatible with standard PCB assembly equipment?

A: Yes. The 8-SMD, Gull Wing package is a standard surface mount configuration compatible with conventional pick-and-place and reflow soldering processes.

Q: What is the significance of the 5300Vrms isolation voltage rating?

A: The 5300Vrms isolation voltage specifies the maximum voltage differential that can be safely applied between the input and output circuits without risk of electrical breakdown. This rating applies uniformly across all listed substitute parts.