TLP621-4XBLSMT&R Equivalent & Substitute Parts

Part Overview

The TLP621-4XBLSMT&R is a quad-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 16-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 657 units in stock. Substitute parts are identified based on matching electrical specifications, mechanical compatibility, and compliance certifications to support component procurement flexibility and supply chain continuity.

Substiute Parts

TLP621-4XBLSMT&R

Isocom Components 2004 LTDIn Stock: 707TLP621-4XBLSMT&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 TLP621-4XBLSMT&R are qualified based on the following critical parameters that determine functional and mechanical interchangeability:

Electrical Equivalence Criteria:

• Number of Channels: 4
• Voltage - Isolation: 5300Vrms
• Current Transfer Ratio: 200% (Min) @ 1mA and 600% (Max) @ 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 Compatibility Criteria:

• Mounting Type: Surface Mount
• Package / Case: 16-SMD, Gull Wing
• Supplier Device Package: 16-SMD
• Packaging: Tape & Reel (TR)

Compliance Criteria:

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

The identified substitutes meet all specified electrical and mechanical parameters, ensuring direct replacement capability in circuit designs without modification to PCB layout or component footprint.

Parameter Comparison

Engineering Selection Recommendations

All three parts—TLP621-4XBLSMT&R, ISP521-4XBLSMT&R, and TLP521-4XBLSMT&R—are active products with ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for electronic component procurement.

TLP621-4XBLSMT&R offers the fastest rise and fall time specifications (2µs, 3µs) and defined turn-on/turn-off timing (3µs, 3µs), making it suitable for applications requiring tighter timing control.

TLP521-4XBLSMT&R provides equivalent turn-on/turn-off timing (3µs, 3µs) with slightly slower rise/fall times (4µs, 3µs) and maintains full electrical compatibility across all critical parameters.

ISP521-4XBLSMT&R delivers the highest inventory availability (1512 units) with equivalent electrical performance. Turn-on/turn-off time is not specified for this variant, and rise/fall times are 4µs, 3µs.

Selection between these parts should be based on application timing requirements, inventory availability, and supply chain considerations. All three parts are mechanically and electrically interchangeable within the specified parameter ranges.

Frequently Asked Questions (FAQ)

Q: Can ISP521-4XBLSMT&R replace TLP621-4XBLSMT&R in all applications?

A: ISP521-4XBLSMT&R meets all specified electrical parameters and mechanical requirements. However, turn-on/turn-off time is not specified for ISP521-4XBLSMT&R. Applications with strict timing requirements should verify that the unspecified timing parameter does not impact circuit performance.

Q: What are the key differences between TLP621-4XBLSMT&R and TLP521-4XBLSMT&R?

A: Both parts share identical isolation voltage (5300Vrms), current transfer ratio (200%-600% @ 1mA), output voltage (55V max), and output current (50mA per channel). The primary difference is rise/fall time: TLP621-4XBLSMT&R specifies 2µs, 3µs while TLP521-4XBLSMT&R specifies 4µs, 3µs. Both maintain 3µs turn-on/turn-off timing.

Q: Are all substitute parts in the same package?

A: Yes. All three parts use 16-SMD, Gull Wing package in Tape & Reel (TR) packaging, ensuring identical PCB footprint and automated assembly compatibility.

Q: Do all parts meet the same compliance standards?

A: Yes. All three parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, meeting current regulatory and environmental requirements.

Q: Which part should be selected for supply chain continuity?

A: TLP521-4XBLSMT&R and ISP521-4XBLSMT&R both offer higher inventory levels (1590 and 1512 units respectively) compared to TLP621-4XBLSMT&R (657 units), providing better availability for high-volume procurement.

Q: Can these parts be used interchangeably on existing PCBs?

A: Yes. All three parts are mechanically and electrically interchangeable. No PCB redesign or layout modification is required for substitution.