ISP817G Optoisolator Equivalent & Substitute Parts

Part Overview

The ISP817G is a single-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This component provides galvanic isolation up to 5300Vrms and is designed for DC input applications requiring isolated switching control. The part is currently in active production status with 1072 units in stock. Substitute parts are identified within the ISP817 series to address inventory availability, supply chain continuity, or specific application requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Manufacturer Part Number	ISP817G
Manufacturer	Isocom Components 2004 LTD
Category	Optoisolators
Series	ISP817
Number of Channels	1
Voltage - Isolation	5300Vrms
Current Transfer Ratio (Min)	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA
Output Type	Transistor
Voltage - Output (Max)	80V
Current - Output / Channel	50mA
Vce Saturation (Max)	200mV
Operating Temperature Range	-55°C ~ 110°C
Package / Case	4-DIP (0.400", 10.16mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

The ISP817G optoisolator has four parametric equivalents within the ISP817 series: ISP817XAG, ISP817XBG, ISP817XCG, and ISP817XDG. These parts are classified as direct substitutes based on the following criteria:

Electrical Parameters (Identical):

Isolation voltage: 5300Vrms
Current transfer ratio range: 50% to 600% @ 5mA
Maximum output voltage: 80V
Maximum output current per channel: 50mA
Maximum Vce saturation: 200mV
Input type: DC
Output type: Transistor

Mechanical Parameters (Identical):

Package type: 4-DIP (0.400", 10.16mm)
Mounting type: Through Hole
Number of channels: 1

Compliance & Environmental (Identical):

RoHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
REACH Status: REACH Unaffected
Operating temperature range: -55°C ~ 110°C

The rise and fall time specifications show minor variations (ISP817G: 3µs, 4µs versus ISP817XAG/XBG/XCG/XDG: 4µs, 3µs), which represent timing sequence differences within acceptable operational tolerances for the optoisolator function.

Parameter Comparison

Parameter	ISP817G	ISP817XAG	ISP817XBG	ISP817XCG	ISP817XDG
Voltage - Isolation	5300Vrms	5300Vrms	5300Vrms	5300Vrms	5300Vrms
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA
Rise / Fall Time (Typ)	3µs, 4µs	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs
Voltage - Output (Max)	80V	80V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA	50mA
Vce Saturation (Max)	200mV	200mV	200mV	200mV	200mV
Operating Temperature	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C
Package / Case	4-DIP (0.400", 10.16mm)	4-DIP (0.400", 10.16mm)	4-DIP (0.400", 10.16mm)	4-DIP (0.400", 10.16mm)	4-DIP (0.400", 10.16mm)
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All four substitute parts (ISP817XAG, ISP817XBG, ISP817XCG, ISP817XDG) are functionally equivalent to the ISP817G and meet identical electrical, mechanical, and compliance requirements. Selection among these parts should be based on:

Availability: Current inventory levels vary across the substitute options. ISP817XAG offers the highest stock level at 3000 units, followed by ISP817XBG (945 units), ISP817XCG (942 units), and ISP817XDG (977 units).

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

Timing Characteristics: The minor variation in rise and fall time sequencing (3µs/4µs versus 4µs/3µs) does not affect functional substitution for standard optoisolator applications within the specified operating temperature range of -55°C to 110°C.

Frequently Asked Questions (FAQ)

Q: Can ISP817XAG, ISP817XBG, ISP817XCG, or ISP817XDG be used as direct replacements for ISP817G?

A: Yes. All four parts are parametric equivalents with identical isolation voltage (5300Vrms), current transfer ratio range (50% to 600% @ 5mA), output specifications (80V maximum, 50mA per channel), and package configuration (4-DIP through-hole). They are suitable for direct substitution in applications designed for ISP817G.

Q: Are there any differences in the rise and fall time specifications?

A: ISP817G specifies rise/fall times of 3µs and 4µs respectively, while ISP817XAG, ISP817XBG, ISP817XCG, and ISP817XDG specify 4µs and 3µs. This represents a reversal in the timing sequence but maintains equivalent overall switching performance within the optoisolator's operational envelope.

Q: Do all substitute parts have the same package and mounting type?

A: Yes. All parts use the 4-DIP (0.400", 10.16mm) package with through-hole mounting, ensuring identical PCB layout compatibility and assembly process requirements.

Q: Are there any compliance or environmental differences between the main part and substitutes?

A: No. All parts are ROHS3 compliant, REACH unaffected, and rated at Moisture Sensitivity Level 1 (unlimited). Operating temperature range is identical at -55°C to 110°C across all variants.

Q: Which substitute part should be selected if multiple options are available?

A: Selection should prioritize inventory availability and supply chain lead times. ISP817XAG provides the highest stock level. All parts are electrically and mechanically equivalent, so the choice does not affect circuit performance or reliability.

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