ISP620-1SM Equivalent & Substitute Parts

Part Overview

The ISP620-1SM is a single-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This surface-mount component provides galvanic isolation up to 5300Vrms and is designed for AC/DC input applications requiring reliable signal isolation in industrial and consumer electronics. The part is currently active in production with full RoHS3 compliance and unlimited moisture sensitivity rating. Substitute parts are identified when equivalent electrical and mechanical parameters are required for design flexibility, inventory management, or supply chain continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	ISP620-1SM
Manufacturer	Isocom Components 2004 LTD
Category	Optoisolators
Number of Channels	1
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
Mounting Type	Surface Mount
Package / Case	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitute parts for the ISP620-1SM are qualified based on strict electrical and mechanical parameter equivalence. The following parameters define substitution eligibility:

Critical Electrical Parameters:

Voltage - Isolation: 5300Vrms
Number of Channels: 1
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

Critical Mechanical Parameters:

Mounting Type: Surface Mount
Package / Case: 4-SMD, Gull Wing
Supplier Device Package: 4-SMD

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

All identified substitute parts maintain identical values across these parameters, ensuring direct functional and physical compatibility.

Parameter Comparison

Parameter	ISP620-1SM	ISP620-1XSM	TLP620XGBSM
Manufacturer	Isocom Components 2004 LTD	Isocom Components 2004 LTD	Isocom Components 2004 LTD
Number of Channels	1	1	1
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
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	4-SMD, Gull Wing	4-SMD, Gull Wing	4-SMD, Gull Wing
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active

Engineering Selection Recommendations

All three optoisolator part numbers—ISP620-1SM, ISP620-1XSM, and TLP620XGBSM—are functionally and mechanically equivalent for applications requiring single-channel AC/DC input optoisolation with 5300Vrms isolation voltage and transistor output. Each part maintains active product status and full RoHS3 compliance with unlimited moisture sensitivity rating.

Selection between these parts should be based on availability and supply chain requirements. ISP620-1XSM offers the highest current inventory (6925 pcs), followed by TLP620XGBSM (910 pcs) and ISP620-1SM (788 pcs). All parts are suitable for direct substitution in surface-mount applications using 4-SMD Gull Wing packaging.

Frequently Asked Questions (FAQ)

Q: Can ISP620-1XSM be used as a direct replacement for ISP620-1SM?

A: Yes. ISP620-1XSM is a parametric equivalent with identical electrical and mechanical specifications. Both parts share the same isolation voltage (5300Vrms), current transfer ratio range (50% to 600% @ 5mA), output characteristics (55V max, 50mA per channel), and 4-SMD Gull Wing package configuration. No circuit modifications are required.

Q: What is the difference between ISP620-1SM and TLP620XGBSM?

A: Both parts are parametric equivalents with identical electrical performance and physical packaging. The primary difference is the series designation (ISP620-1 versus TLP620) and manufacturer inventory levels. All critical parameters including isolation voltage, current transfer ratio, output voltage/current ratings, and operating temperature range are identical.

Q: Are all three parts RoHS3 compliant?

A: Yes. ISP620-1SM, ISP620-1XSM, and TLP620XGBSM are all ROHS3 Compliant with MSL rating of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage and handling.

Q: Can these optoisolators be used in both AC and DC input applications?

A: Yes. All three parts support both AC and DC input types, providing design flexibility for applications requiring either signal type or mixed-mode operation.

Q: What is the maximum isolation voltage rating?

A: All three parts provide 5300Vrms isolation voltage, suitable for high-voltage isolation requirements in industrial control, power supply, and safety-critical applications.

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