TLP621-2GR Equivalent & Substitute Parts

Part Overview

The TLP621-2GR 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 947 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product category, enabling direct replacement in circuit designs without functional degradation.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLP621-2GR
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 TLP621-2GR are qualified based on the following critical parameters that must remain constant:

Number of Channels: 2
Voltage - Isolation: 5300Vrms
Current Transfer Ratio range: 50% (Min) to 600% (Max) @ 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
Input Type: DC
RoHS Status: ROHS3 Compliant

All identified substitute parts maintain these electrical and mechanical specifications. Variations in timing parameters (Turn On/Turn Off Time, Rise/Fall Time) do not disqualify substitution when all primary functional parameters align.

Parameter Comparison

Parameter	TLP621-2GR	ISP521-2XG	ISP621-2XG	ISP621-2XGR	ISP621-2XGRG	TLP521-2XG
Manufacturer	Isocom	Isocom	Isocom	Isocom	Isocom	Isocom
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
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
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	8-DIP	8-DIP	8-DIP	8-DIP	8-DIP
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
Input Type	DC	DC	DC	DC	DC	DC
Inventory Status	947 Pcs	996 Pcs	810 Pcs	1059 Pcs	1155 Pcs	1055 Pcs

Engineering Selection Recommendations

All substitute parts listed maintain full electrical and mechanical equivalence to the TLP621-2GR. Selection among these alternatives is based on availability and product status:

ISP621-2XGRG offers the highest inventory level at 1155 units
ISP621-2XGR provides 1059 units in stock
TLP521-2XG and ISP521-2XG maintain equivalent performance with 1055 and 996 units respectively
ISP621-2XG is available with 810 units

All parts are active products with ROHS3 compliance and REACH unaffected status. No functional degradation occurs when substituting any listed part for the TLP621-2GR in applications requiring dual-channel 5300Vrms isolation with transistor output in 8-DIP through-hole packaging.

Frequently Asked Questions (FAQ)

Q: Can ISP621-2XGR be used as a direct replacement for TLP621-2GR?

A: Yes. Both parts maintain identical electrical specifications including 5300Vrms isolation voltage, 50-600% current transfer ratio, 55V maximum output voltage, and 50mA per-channel output current. The 8-DIP through-hole package and operating temperature range are identical.

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

A: Both parts meet all substitution criteria for the TLP621-2GR. The primary difference is series designation (TLP521 vs ISP621). Electrical parameters, isolation voltage, output specifications, and package type are equivalent.

Q: Are timing parameters critical for substitution?

A: Timing parameters (Turn On/Turn Off Time, Rise/Fall Time) vary slightly among substitute parts but do not affect substitution eligibility. The TLP621-2GR specifies 3µs turn-on/off time and 2µs/3µs rise/fall time, while some substitutes list these as unspecified or with 4µs rise time. These variations remain within acceptable operational margins for dual-channel optoisolator applications.

Q: Is the 8-DIP package compatible across all substitute parts?

A: Yes. All substitute parts use the 8-DIP (0.400", 10.16mm) through-hole package. Direct PCB mounting compatibility is maintained without modification.

Q: Do all substitute parts meet RoHS and REACH requirements?

A: Yes. All listed substitute parts are ROHS3 compliant and REACH unaffected, matching the TLP621-2GR compliance status.

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