TLP621-2GRG Equivalent & Substitute Parts

Part Overview

The TLP621-2GRG is a dual-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 8-DIP through-hole component provides 5300Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation. The part is currently active in production with 897 units in stock. Substitute parts are identified based on matching electrical specifications, isolation ratings, channel configuration, and package compatibility to ensure direct functional replacement in circuit designs.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLP621-2GRG
Manufacturer	Isocom Components 2004 LTD
Category	Optoisolators
Number of Channels	2
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA
Output Type	Transistor
Voltage - Output (Max)	55V
Current - Output / Channel	50mA
Package / Case	8-DIP (0.400", 10.16mm)
Mounting Type	Through Hole
Operating Temperature	-30°C ~ 100°C
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the TLP621-2GRG are qualified based on the following critical parameters:

Isolation Voltage: 5300Vrms (all substitutes match)
Number of Channels: 2 (all substitutes match)
Output Type: Transistor (all substitutes match)
Package / Case: 8-DIP (0.400", 10.16mm) (all substitutes match)
Mounting Type: Through Hole (all substitutes match)
Current Transfer Ratio Range: 50% to 600% @ 5mA (all substitutes match)
Maximum Output Voltage: 55V (all substitutes match)
Maximum Output Current per Channel: 50mA (all substitutes match)
Operating Temperature Range: -30°C ~ 100°C (all substitutes match)

The following parts meet all electrical and mechanical substitution criteria: ISP521-2XG, ISP621-2XG, ISP621-2XGR, ISP621-2XGRG, and TLP521-2XG.

Parameter Comparison

Parameter	TLP621-2GRG	ISP521-2XG	ISP621-2XG	ISP621-2XGR	ISP621-2XGRG	TLP521-2XG
Manufacturer	Isocom	Isocom	Isocom	Isocom	Isocom	Isocom
Series	TLP621-2	ISP521-2	ISP621-2	ISP621-2	ISP621-2	TLP521-2
Number of Channels	2	2	2	2	2	2
Voltage - Isolation	5300Vrms	5300Vrms	5300Vrms	5300Vrms	5300Vrms	5300Vrms
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA
Turn On / Turn Off Time (Typ)	3µs, 3µs	—	—	—	—	3µs, 3µs
Rise / Fall Time (Typ)	2µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs
Output Type	Transistor	Transistor	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	55V	55V	55V	55V	55V	55V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.15V	1.15V	1.15V	1.15V	1.15V	1.15V
Current - DC Forward (If) (Max)	50mA	50mA	50mA	50mA	50mA	50mA
Vce Saturation (Max)	400mV	400mV	400mV	400mV	400mV	400mV
Operating Temperature	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C
Package / Case	8-DIP (0.400", 10.16mm)	8-DIP (0.400", 10.16mm)	8-DIP (0.400", 10.16mm)	8-DIP (0.400", 10.16mm)	8-DIP (0.400", 10.16mm)	8-DIP (0.400", 10.16mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active	Active	Active	Active

Engineering Selection Recommendations

All five substitute parts are qualified for direct replacement of the TLP621-2GRG based on matching electrical specifications and mechanical compatibility. Selection among these alternatives should be based on:

Availability and Lead Time: ISP621-2XGRG (1155 units), ISP621-2XGR (1059 units), and TLP521-2XG (1055 units) offer the highest inventory levels. ISP621-2XG (810 units) and ISP521-2XG (996 units) provide additional options.

Compliance and Regulatory Status: All substitute parts maintain ROHS3 compliance, REACH unaffected status, and MSL 1 rating, ensuring compatibility with current manufacturing and environmental standards.

Timing Characteristics: TLP521-2XG matches the original TLP621-2GRG with identical turn-on/turn-off times (3µs, 3µs). ISP521-2XG, ISP621-2XG, ISP621-2XGR, and ISP621-2XGRG do not specify turn-on/turn-off times but provide rise/fall times of 4µs and 3µs respectively, which remain within acceptable substitution parameters for most applications.

Frequently Asked Questions (FAQ)

Q: Can ISP521-2XG, ISP621-2XG, ISP621-2XGR, and ISP621-2XGRG be used as direct replacements for TLP621-2GRG?

A: Yes. All four parts meet the critical substitution criteria: 5300Vrms isolation voltage, dual-channel configuration, transistor output type, 8-DIP through-hole package, 50mA per-channel output current, and -30°C to 100°C operating temperature range.

Q: What is the difference between TLP521-2XG and the ISP621 series substitutes?

A: TLP521-2XG belongs to the TLP521-2 series and matches the original TLP621-2GRG in turn-on/turn-off timing specifications (3µs, 3µs). ISP521-2XG, ISP621-2XG, ISP621-2XGR, and ISP621-2XGRG are from different series (ISP521-2 and ISP621-2) and do not specify turn-on/turn-off times in the provided data. All parts share identical rise/fall time characteristics of 4µs and 3µs.

Q: Are there any package or pinout differences between these substitute parts?

A: No. All substitute parts use the identical 8-DIP (0.400", 10.16mm) through-hole package with the same mounting type, ensuring direct PCB compatibility without layout modifications.

Q: Do all substitute parts comply with current environmental and regulatory standards?

A: Yes. All substitute parts are ROHS3 compliant, REACH unaffected, and carry MSL 1 (unlimited moisture sensitivity level), meeting current manufacturing and environmental requirements.

Q: Which substitute part should be selected for applications requiring specific timing performance?

A: For applications where turn-on/turn-off timing is critical, TLP521-2XG is the preferred substitute, as it specifies identical timing characteristics (3µs, 3µs) to the original TLP621-2GRG. For applications where rise/fall time is the primary timing consideration, all five substitutes are equivalent.

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