TLP621-2SM Equivalent & Substitute Parts

Part Overview

The TLP621-2SM 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 in active production status with 739 units in stock. Substitute parts are identified based on matching electrical characteristics, mechanical compatibility, and compliance certifications to ensure direct functional equivalence in circuit applications.

Substiute Parts

TLP621-2SM

Isocom Components 2004 LTDIn Stock: 785TLP621-2SM 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 TLP621-2SM are qualified based on the following critical parameters that determine functional equivalence:

• Number of Channels: 2 channels (dual configuration)
• Voltage - Isolation: 5300Vrms minimum
• Output Type: Transistor output
• Current Transfer Ratio: 50% minimum @ 5mA
• Voltage - Output (Max): 55V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV
• Package / Case: 8-SMD, Gull Wing
• Operating Temperature Range: -30°C ~ 100°C
• RoHS Status: ROHS3 Compliant

All substitute parts listed maintain these electrical and mechanical specifications, ensuring direct compatibility in circuit applications without design modification.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active production status and full ROHS3 compliance, ensuring regulatory alignment with current manufacturing standards. The TLP621-2SM, ISP521-2XSM, ISP621-2XGRSM, and ISP621-2XSM are electrically and mechanically equivalent for dual-channel 5300Vrms isolation applications.

The primary distinction between the main part and substitute options is the rise/fall time specification. The TLP621-2SM specifies 2µs turn-on and 3µs turn-off times, while substitute parts specify 4µs rise and 3µs fall times. This difference is within acceptable tolerance for most isolation applications but should be evaluated against specific circuit timing requirements.

All parts share identical isolation voltage, current transfer ratio ranges, output voltage and current ratings, saturation voltage, temperature operating range, and package configuration. Selection between these parts should be based on availability, lead time, and application-specific timing constraints.

Frequently Asked Questions (FAQ)

Q: Can ISP521-2XSM, ISP621-2XGRSM, and ISP621-2XSM be used interchangeably with TLP621-2SM?

A: Yes, these parts are parametric equivalents. All maintain 5300Vrms isolation voltage, 2-channel configuration, 50% to 600% current transfer ratio range, 55V maximum output voltage, 50mA per-channel output current, and identical package specifications. They are suitable for direct substitution in circuit applications.

Q: What is the difference in timing between TLP621-2SM and the substitute parts?

A: The TLP621-2SM specifies 3µs turn-on and turn-off times with 2µs rise and 3µs fall times. Substitute parts do not specify turn-on/turn-off times but specify 4µs rise and 3µs fall times. Applications with strict timing requirements below 4µs should reference detailed datasheets for the specific substitute part.

Q: Are all parts ROHS3 compliant?

A: Yes, the TLP621-2SM and all substitute parts are ROHS3 compliant with MSL rating of 1 (unlimited moisture sensitivity level), meeting current environmental and regulatory requirements.

Q: What is the package configuration for these optoisolators?

A: All parts use 8-pin surface mount dual in-line package (8-SMD) with gull wing leads, suitable for automated assembly and reflow soldering processes.

Q: Are there inventory considerations when selecting a substitute?

A: Current inventory levels are TLP621-2SM (739 units), ISP521-2XSM (1145 units), ISP621-2XGRSM (921 units), and ISP621-2XSM (957 units). Substitute parts offer higher stock availability for immediate procurement needs.