TLP621-4GRG Equivalent & Substitute Parts

Part Overview

The TLP621-4GRG is a quad-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 16-DIP through-hole component provides 5300Vrms isolation across four independent channels, making it suitable for applications requiring galvanic isolation in industrial control, power management, and signal conditioning circuits. The part is currently active in production with 659 units in stock. Substitute parts are identified to support component availability, supply chain flexibility, and design continuity.

Substiute Parts

TLP621-4GRG

Isocom Components 2004 LTDIn Stock: 697TLP621-4GRG Datasheet

Current PartRFQ

ISP621-4XGB

Isocom Components 2004 LTDIn Stock: 952ISP621-4XGB Datasheet

Parametric EquivalentRFQ

ISP621-4XGBG

Isocom Components 2004 LTDIn Stock: 852ISP621-4XGBG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TLP621-4GRG are identified based on strict electrical and mechanical parameter matching within the optoisolator category. The substitution criteria are:

Critical Parameters for Substitution:

• Number of Channels: 4 (must match exactly)
• Voltage - Isolation: 5300Vrms (must match exactly)
• Current Transfer Ratio range: 100% to 600% @ 5mA (must match exactly)
• Output Type: Transistor (must match exactly)
• Voltage - Output (Max): 55V (must match exactly)
• Current - Output / Channel: 50mA (must match exactly)
• Package / Case: 16-DIP (0.400", 10.16mm) (must match exactly)
• Operating Temperature: -30°C ~ 100°C (must match exactly)
• Input Type: DC (must match exactly)
• Mounting Type: Through Hole (must match exactly)

The identified substitutes ISP621-4XGB and ISP621-4XGBG meet all critical electrical and mechanical parameters. Minor variations in Rise / Fall Time specifications do not affect functional equivalence for standard isolation applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—TLP621-4GRG, ISP621-4XGB, and ISP621-4XGBG—are active products from the same manufacturer with identical electrical specifications and package configurations. Each part carries ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements for industrial and commercial applications.

Selection between these parts should be based on:

• Availability: ISP621-4XGB (879 units) and ISP621-4XGBG (798 units) offer higher inventory levels than TLP621-4GRG (659 units).
• Supply Chain Requirements: All parts share identical isolation voltage, channel count, output current, and thermal operating range, ensuring direct functional interchangeability.
• Regulatory Compliance: All parts maintain equivalent RoHS3 and REACH compliance status.

Frequently Asked Questions (FAQ)

Q: Can ISP621-4XGB or ISP621-4XGBG be used as direct replacements for TLP621-4GRG?

A: Yes. Both substitute parts meet all critical electrical and mechanical parameters: 4-channel configuration, 5300Vrms isolation, 100-600% current transfer ratio, 55V maximum output voltage, 50mA per-channel output current, and 16-DIP through-hole package. All three parts operate across the identical temperature range (-30°C to 100°C).

Q: Are there differences in timing specifications between the main part and substitutes?

A: The TLP621-4GRG specifies Turn On / Turn Off Time at 3µs typical for both parameters. The ISP621-4XGB and ISP621-4XGBG do not provide Turn On / Turn Off Time specifications. Rise / Fall Time specifications differ slightly (TLP621-4GRG: 2µs, 3µs; substitutes: 4µs, 3µs). These variations do not affect functional equivalence for standard isolation applications.

Q: Do all parts use the same package and mounting method?

A: Yes. All three parts use 16-DIP (0.400", 10.16mm) through-hole packages with identical pin configurations and PCB mounting requirements.

Q: Are there compliance or certification differences?

A: No. All parts carry identical RoHS3 compliance, REACH unaffected status, and EAR99 export classification.

Q: Which part should be selected for new designs?

A: Selection should prioritize current inventory availability and supply chain lead times. All three parts are functionally equivalent and suitable for new designs requiring quad-channel 5300Vrms isolation with transistor output.