ISP620-4 Equivalent & Substitute Parts

Part Overview

The ISP620-4 is a quad optocoupler with transistor output, rated for 5300Vrms isolation voltage, designed for AC and DC input applications. This 16-pin DIP component provides four independent isolation channels with 50mA output current per channel. The part is currently active in production with 4300 units in stock. Substitute parts are identified when design requirements necessitate alternative sourcing, inventory constraints, or supply chain optimization while maintaining full electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	ISP620-4
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
Rise / Fall Time	4µs, 3µs
Input Type	AC, DC
Output Type	Transistor
Voltage - Output (Max)	55V
Current - Output / Channel	50mA
Vce Saturation (Max)	400mV
Operating Temperature	-30°C ~ 100°C
Package / Case	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the ISP620-4 are qualified based on the following critical parameters that determine functional interchangeability:

Isolation Voltage: 5300Vrms (exact match required)
Number of Channels: 4 (exact match required)
Output Type: Transistor (exact match required)
Package / Case: 16-DIP (0.300", 7.62mm) (exact match required)
Current Transfer Ratio Range: 50% (Min) to 600% (Max) @ 5mA (exact match required)
Rise / Fall Time: 4µs, 3µs (exact match required)
Input Type: AC, DC (exact match required)
Maximum Output Voltage: 55V (exact match required)
Output Current per Channel: 50mA (exact match required)
Vce Saturation: 400mV (exact match required)
Operating Temperature Range: -30°C ~ 100°C (exact match required)

All substitute parts must maintain identical electrical specifications and physical form factor to ensure direct replacement capability without circuit redesign or PCB modification.

Parameter Comparison

Parameter	ISP620-4	ISP620-4X	TLP620-4X
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
Rise / Fall Time	4µs, 3µs	4µs, 3µs	4µs, 3µs
Input Type	AC, DC	AC, DC	AC, DC
Output Type	Transistor	Transistor	Transistor
Voltage - Output (Max)	55V	55V	55V
Current - Output / Channel	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-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)	16-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three parts—ISP620-4, ISP620-4X, and TLP620-4X—are active production components manufactured by Isocom Components 2004 LTD with identical electrical and mechanical specifications. Selection between these parts is determined by inventory availability and supply chain requirements rather than technical performance differences.

ISP620-4 and ISP620-4X are parametrically equivalent variants within the same series. TLP620-4X is a cross-manufacturer equivalent offering the same functional performance and package compatibility. All three parts carry ROHS3 compliance, unlimited moisture sensitivity rating (MSL 1), and REACH unaffected status, making them suitable for equivalent use in regulated applications.

Frequently Asked Questions (FAQ)

Q: Can ISP620-4X be used as a direct replacement for ISP620-4?

A: Yes. ISP620-4X is a parametric equivalent with identical electrical specifications, isolation voltage, channel count, output characteristics, and 16-DIP package. No circuit modification or PCB redesign is required.

Q: Is TLP620-4X compatible with ISP620-4 applications?

A: Yes. TLP620-4X meets all electrical and mechanical requirements of ISP620-4, including 5300Vrms isolation, 4-channel configuration, 50mA output current, and 16-DIP form factor. Direct substitution is possible without design changes.

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

A: Substitution eligibility is determined by exact matching of isolation voltage (5300Vrms), channel count (4), output type (transistor), package form factor (16-DIP), current transfer ratio range (50%-600% @ 5mA), rise/fall time (4µs, 3µs), input type (AC/DC), maximum output voltage (55V), output current per channel (50mA), Vce saturation (400mV), and operating temperature range (-30°C to 100°C).

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

A: No. All three parts are ROHS3 compliant, carry MSL 1 rating, and are REACH unaffected. Compliance status is identical across ISP620-4, ISP620-4X, and TLP620-4X.

Q: Can these parts be used interchangeably in high-isolation applications?

A: Yes. All three parts maintain 5300Vrms isolation rating and are suitable for applications requiring high-voltage isolation between input and output circuits.

Q: What is the difference between ISP620-4 and ISP620-4X?

A: Both parts are from the same ISP620-4 series with identical specifications. The difference is in part number designation and inventory availability. ISP620-4X has 910 units in stock compared to ISP620-4 with 4300 units.

Q: Is the 16-DIP package compatible with standard through-hole PCB layouts?

A: Yes. All three parts use the standard 16-DIP (0.300", 7.62mm) through-hole package, compatible with conventional PCB drilling and component placement equipment.

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