TLP621-4XSMT&R Equivalent & Substitute Parts

Part Overview

The TLP621-4XSMT&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 between input and output circuits. The part is currently in active production status with 724 units available in inventory. Substitute parts are identified based on matching electrical specifications, mechanical compatibility, and compliance certifications to ensure direct functional equivalence in circuit applications.

Key Parameters

Parameter	Value
Manufacturer Part Number	TLP621-4XSMT&R
Manufacturer	Isocom Components 2004 LTD
Category	Optoisolators
Number of Channels	4
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	16-SMD, Gull Wing
Operating Temperature	-30°C ~ 100°C
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the TLP621-4XSMT&R are qualified based on the following electrical and mechanical parameters:

Number of Channels: 4 channels
Voltage - Isolation: 5300Vrms
Current Transfer Ratio: 50% (Min) @ 5mA and 600% (Max) @ 5mA
Output Type: Transistor
Voltage - Output (Max): 55V
Current - Output / Channel: 50mA
Package / Case: 16-SMD, Gull Wing
Mounting Type: Surface Mount
Operating Temperature Range: -30°C ~ 100°C
RoHS Status: ROHS3 Compliant

The identified substitute parts ISP521-4XSMT&R and TLP521-4XSMT&R meet all critical electrical specifications and mechanical requirements, ensuring functional equivalence in circuit design applications.

Parameter Comparison

Parameter	TLP621-4XSMT&R	ISP521-4XSMT&R	TLP521-4XSMT&R
Manufacturer	Isocom Components 2004 LTD	Isocom Components 2004 LTD	Isocom Components 2004 LTD
Number of Channels	4	4	4
Voltage - Isolation	5300Vrms	5300Vrms	5300Vrms
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA	600% @ 5mA	600% @ 5mA
Turn On / Turn Off Time (Typ)	3µs, 3µs	Not specified	Not specified
Rise / Fall Time (Typ)	2µs, 3µs	4µs, 3µs	4µs, 3µs
Output Type	Transistor	Transistor	Transistor
Voltage - Output (Max)	55V	55V	55V
Current - Output / Channel	50mA	50mA	50mA
Voltage - Forward (Vf) (Typ)	1.15V	1.15V	1.15V
Current - DC Forward (If) (Max)	50mA	50mA	50mA
Vce Saturation (Max)	400mV	400mV	400mV
Operating Temperature	-30°C ~ 100°C	-30°C ~ 100°C	-30°C ~ 100°C
Package / Case	16-SMD, Gull Wing	16-SMD, Gull Wing	16-SMD, Gull Wing
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts—TLP621-4XSMT&R, ISP521-4XSMT&R, and TLP521-4XSMT&R—are active production components from Isocom Components 2004 LTD with identical isolation voltage, channel count, output current ratings, and operating temperature ranges. All parts carry ROHS3 compliance and REACH Unaffected status, meeting regulatory requirements for industrial and commercial applications.

The primary distinction between TLP621-4XSMT&R and the substitute parts lies in timing specifications. The TLP621-4XSMT&R specifies turn-on and turn-off times of 3µs with rise and fall times of 2µs and 3µs respectively. The ISP521-4XSMT&R and TLP521-4XSMT&R do not specify turn-on/turn-off times and have rise and fall times of 4µs and 3µs. Selection should be based on application timing requirements and part availability.

Frequently Asked Questions (FAQ)

Q: Can ISP521-4XSMT&R and TLP521-4XSMT&R be used interchangeably with TLP621-4XSMT&R?

A: Yes, within the constraints of timing specifications. All three parts share identical isolation voltage (5300Vrms), channel configuration (4 channels), output current capability (50mA per channel), and package format (16-SMD, Gull Wing). The substitute parts have slightly different rise and fall time specifications and do not specify turn-on/turn-off times. Applications with strict timing requirements should verify compatibility with actual device datasheets.

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

A: No. All three parts carry identical compliance certifications: ROHS3 Compliant, REACH Unaffected, and MSL 1 (Unlimited). They are suitable for equivalent regulatory environments.

Q: What is the significance of the rise and fall time differences?

A: The TLP621-4XSMT&R specifies 2µs rise time and 3µs fall time, while ISP521-4XSMT&R and TLP521-4XSMT&R specify 4µs rise time and 3µs fall time. Applications with high-speed signal switching or stringent timing margins should account for these differences in circuit design.

Q: Are all parts available in the same packaging format?

A: Yes. All three parts use 16-SMD, Gull Wing surface mount packaging with Tape & Reel (TR) distribution format, ensuring identical PCB assembly compatibility.

Q: What inventory levels are available for each part?

A: TLP621-4XSMT&R has 724 units in stock, ISP521-4XSMT&R has 1673 units, and TLP521-4XSMT&R has 1823 units available as new original inventory.

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