TLP521-4BLSMT&R Equivalent & Substitute Parts

Part Overview

The TLP521-4BLSMT&R is a quad-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 16-pin surface mount device provides galvanic isolation up to 5300Vrms across four independent channels, each capable of 50mA output current. The part is active in production with 1060 units currently in stock. Alternative models become necessary when addressing supply chain constraints, inventory availability, or specific application requirements within the defined electrical and mechanical parameter space.

Substiute Parts

TLP521-4BLSMT&R

Isocom Components 2004 LTDIn Stock: 1143TLP521-4BLSMT&R Datasheet

Current PartRFQ

ISP521-4XBLSMT&R

Isocom Components 2004 LTDIn Stock: 1567ISP521-4XBLSMT&R Datasheet

Parametric EquivalentRFQ

TLP521-4XBLSMT&R

Isocom Components 2004 LTDIn Stock: 1613TLP521-4XBLSMT&R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLP521-4BLSMT&R are qualified based on strict equivalence across the following critical parameters:

• Number of Channels: 4
• Voltage - Isolation: 5300Vrms
• Current Transfer Ratio range: 200% (Min) to 600% (Max) @ 1mA
• Output Type: Transistor
• Voltage - Output (Max): 55V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV
• Operating Temperature: -30°C ~ 100°C
• Package / Case: 16-SMD, Gull Wing
• Mounting Type: Surface Mount
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

All substitute parts maintain identical electrical performance specifications and mechanical compatibility. Substitutes are drawn from the same manufacturer to ensure consistency in design, quality, and reliability standards.

Parameter Comparison

Engineering Selection Recommendations

All three parts—TLP521-4BLSMT&R, TLP521-4XBLSMT&R, and ISP521-4XBLSMT&R—are active products manufactured by Isocom Components 2004 LTD and maintain full ROHS3 compliance and REACH unaffected status. Selection between these parts should be based on:

• Inventory availability: TLP521-4XBLSMT&R offers the highest stock level at 1590 units, followed by ISP521-4XBLSMT&R at 1512 units, and TLP521-4BLSMT&R at 1060 units.
• Series designation: TLP521-4XBLSMT&R maintains the same TLP521-4 series as the primary part, while ISP521-4XBLSMT&R belongs to the ISP521-4 series.
• Timing specifications: TLP521-4BLSMT&R and TLP521-4XBLSMT&R both specify turn-on and turn-off times of 3µs, while ISP521-4XBLSMT&R does not provide this specification.

All parts are suitable for applications requiring quad-channel galvanic isolation at 5300Vrms with transistor output capability.

Frequently Asked Questions (FAQ)

Q: Can TLP521-4XBLSMT&R be used as a direct replacement for TLP521-4BLSMT&R?

A: Yes. Both parts maintain identical electrical specifications across all critical parameters including isolation voltage, current transfer ratio, output voltage and current ratings, saturation voltage, and operating temperature range. Both are packaged in 16-SMD gull wing configuration and are surface mount compatible.

Q: What is the difference between TLP521-4BLSMT&R and ISP521-4XBLSMT&R?

A: The primary differences are series designation (TLP521-4 versus ISP521-4) and timing specification documentation. ISP521-4XBLSMT&R does not specify turn-on and turn-off times, whereas TLP521-4BLSMT&R specifies 3µs for both parameters. All other electrical and mechanical parameters are equivalent.

Q: Are all three parts suitable for the same PCB layout?

A: Yes. All three parts use identical 16-SMD gull wing packaging with the same pin configuration, footprint, and surface mount requirements. PCB layouts designed for one part are compatible with all three.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and carry MSL rating of 1 (unlimited moisture sensitivity level). All are active products from the same manufacturer.

Q: Which part should be selected for new designs?

A: Selection should be based on current inventory availability and series preference. TLP521-4XBLSMT&R offers the highest stock level and maintains the TLP521-4 series designation. ISP521-4XBLSMT&R provides an alternative with comparable availability. All are suitable for new designs meeting the specified electrical and mechanical requirements.