ISP621-4XGRSMT&R Equivalent & Substitute Parts

Part Overview

The ISP621-4XGRSMT&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 with DC input and transistor output configuration. The part is active and in production. Substitute parts are identified based on matching electrical specifications, isolation ratings, channel configuration, and package compatibility to ensure direct functional equivalence in circuit applications.

Substiute Parts

ISP621-4XGRSMT&R

Isocom Components 2004 LTDIn Stock: 835ISP621-4XGRSMT&R Datasheet

Current PartRFQ

ISP521-4XSMT&R

Isocom Components 2004 LTDIn Stock: 1691ISP521-4XSMT&R Datasheet

Parametric EquivalentRFQ

TLP521-4XSMT&R

Isocom Components 2004 LTDIn Stock: 1897TLP521-4XSMT&R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISP621-4XGRSMT&R are qualified based on the following critical parameters that determine functional equivalence:

• Number of Channels: 4 channels required
• Voltage - Isolation: 5300Vrms isolation voltage
• Current Transfer Ratio: 50% (Min) @ 5mA and 600% (Max) @ 5mA
• Output Type: Transistor output configuration
• Voltage - Output (Max): 55V maximum output voltage
• Current - Output / Channel: 50mA per channel
• Vce Saturation (Max): 400mV maximum saturation voltage
• Rise / Fall Time (Typ): 4µs rise time, 3µs fall time
• Package / Case: 16-SMD, Gull Wing surface mount package
• Operating Temperature: -30°C ~ 100°C range
• Input Type: DC input
• RoHS Status: ROHS3 Compliant

All identified substitute parts match these parameters exactly, ensuring direct replacement capability without circuit redesign.

Parameter Comparison

Engineering Selection Recommendations

All three parts—ISP621-4XGRSMT&R, ISP521-4XSMT&R, and TLP521-4XSMT&R—are active products manufactured by Isocom Components 2004 LTD with identical electrical and mechanical specifications. Selection between these parts is based on availability and supply chain considerations rather than technical differentiation.

All parts maintain ROHS3 compliance and MSL Level 1 rating, meeting environmental and moisture handling requirements for standard manufacturing processes. The 16-SMD Gull Wing package is consistent across all variants, ensuring compatibility with existing PCB layouts and assembly equipment.

Frequently Asked Questions (FAQ)

Q: Can ISP521-4XSMT&R replace ISP621-4XGRSMT&R in existing designs?

A: Yes. Both parts share identical electrical specifications including 5300Vrms isolation voltage, 4-channel configuration, 50% to 600% current transfer ratio, 55V maximum output voltage, and 50mA per-channel output current. The 16-SMD Gull Wing package is identical, enabling direct PCB substitution without layout modification.

Q: Can TLP521-4XSMT&R replace ISP621-4XGRSMT&R in existing designs?

A: Yes. TLP521-4XSMT&R matches all critical parameters of ISP621-4XGRSMT&R including isolation voltage, channel count, current transfer ratio, output voltage and current ratings, switching times, and package configuration. Direct substitution is supported.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: 4-channel configuration, 5300Vrms isolation voltage, 50% to 600% current transfer ratio at 5mA, transistor output type, 55V maximum output voltage, 50mA per-channel current, 400mV maximum Vce saturation, 4µs/3µs rise/fall times, -30°C to 100°C operating temperature range, and 16-SMD Gull Wing surface mount package.

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

A: No. All three parts are ROHS3 compliant, REACH unaffected, and carry MSL Level 1 rating. Compliance status is identical across ISP621-4XGRSMT&R, ISP521-4XSMT&R, and TLP521-4XSMT&R.

Q: Does packaging differ between these optoisolators?

A: No. All parts use identical 16-SMD Gull Wing surface mount packaging with Tape & Reel (TR) supply format. PCB footprints and assembly processes are compatible across all three part numbers.