TLP521-2BLSMT&R Equivalent & Substitute Parts

Part Overview

The TLP521-2BLSMT&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 active in production with 978 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

TLP521-2BLSMT&R

Isocom Components 2004 LTDIn Stock: 1040TLP521-2BLSMT&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 TLP521-2BLSMT&R are qualified based on the following critical parameters that determine functional interchangeability:

Electrical Equivalence Criteria:

• Number of Channels: 2
• Voltage - Isolation: 5300Vrms
• Current Transfer Ratio range: 200% to 600% @ 1mA
• Output Type: Transistor
• Voltage - Output (Max): 55V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV
• Operating Temperature range: -30°C ~ 100°C
• Input Type: DC

Mechanical & Packaging Equivalence Criteria:

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

Compliance Equivalence Criteria:

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

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

Both ISP521-2XBLSMT&R and TLP521-2XBLSMT&R are qualified as direct parametric equivalents to the TLP521-2BLSMT&R. All three parts share identical electrical specifications, mechanical packaging, and compliance certifications.

TLP521-2XBLSMT&R maintains complete parameter alignment with the primary part, including specified Turn On / Turn Off Time values of 3µs, 3µs. This part is recommended when timing specifications are critical to circuit performance.

ISP521-2XBLSMT&R meets all electrical and mechanical requirements with one exception: Turn On / Turn Off Time is not specified in available documentation. This part is suitable for applications where timing parameters are not design-limiting factors. Higher inventory availability (2023 units) may support supply chain requirements.

All three parts carry ROHS3 compliance, REACH Unaffected status, and MSL Level 1 (Unlimited) moisture sensitivity rating, confirming suitability for standard manufacturing and storage environments.

Frequently Asked Questions (FAQ)

Q: Can ISP521-2XBLSMT&R be used as a direct replacement for TLP521-2BLSMT&R?

A: Yes, ISP521-2XBLSMT&R is a parametric equivalent. All critical electrical parameters, isolation voltage, current transfer ratio, output characteristics, and mechanical packaging are identical. The only difference is that Turn On / Turn Off Time specifications are not documented for the ISP521-2X variant. If your circuit design does not impose timing constraints on these parameters, substitution is valid.

Q: What is the significance of the "X" designation in TLP521-2XBLSMT&R?

A: The "X" in the part number indicates a variant within the TLP521-2 series. Both TLP521-2BLSMT&R and TLP521-2XBLSMT&R are from the same series and manufacturer, with identical electrical and mechanical specifications. The variant designation does not affect functional interchangeability.

Q: Are all three parts suitable for high-voltage isolation applications?

A: Yes. All three parts provide 5300Vrms isolation voltage and are rated for identical operating conditions. They are suitable for applications requiring galvanic isolation in industrial, automotive, and power management circuits.

Q: What is the difference in packaging between these parts?

A: There is no difference. All three parts use 8-SMD, Gull Wing surface-mount packaging in Tape & Reel format. They are mechanically and electrically compatible for PCB assembly using standard SMD equipment.

Q: Are there any compliance or regulatory differences between these parts?

A: No. All three parts carry identical compliance certifications: ROHS3 Compliant, REACH Unaffected, and MSL Level 1 (Unlimited). They meet the same regulatory requirements for manufacturing and deployment.

Q: Which part should I select if timing performance is critical?

A: Select TLP521-2XBLSMT&R or the primary part TLP521-2BLSMT&R, both of which specify Turn On / Turn Off Time at 3µs, 3µs. ISP521-2XBLSMT&R does not provide this specification and should be avoided if timing margins are design-critical.