ISP817XB Equivalent & Substitute Parts

Part Overview

The ISP817XB is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This single-channel device provides galvanic isolation rated at 5300Vrms and is housed in a 4-DIP package for through-hole mounting. The part is currently active in production with 1225 units in stock. Equivalent substitute parts are necessary when primary inventory is depleted, when alternative sourcing is required for supply chain continuity, or when design flexibility permits selection from the ISP817 series variants.

Key Parameters

Parameter	Value
Manufacturer Part Number	ISP817XB
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
Rise / Fall Time (Typ)	4µs, 3µs
Operating Temperature	-55°C ~ 110°C
Package / Case	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
RoHS Status	ROHS3 Compliant
Product Status	Active

Substitute Part Grouping Explanation

The ISP817XB belongs to the ISP817 optoisolator series manufactured by Isocom Components 2004 LTD. Substitute parts within this series are qualified as parametric equivalents when they maintain identical electrical and mechanical specifications across all critical parameters. The substitution criteria are based strictly on the following parameters:

Voltage - Isolation: 5300Vrms
Number of Channels: 1
Current Transfer Ratio range: 50% to 600% @ 5mA
Output Type: Transistor
Voltage - Output (Max): 80V
Current - Output / Channel: 50mA
Vce Saturation (Max): 200mV
Rise / Fall Time: 4µs, 3µs
Operating Temperature: -55°C ~ 110°C
Package / Case: 4-DIP (0.300", 7.62mm)
Mounting Type: Through Hole

All substitute parts listed (ISP817XA, ISP817XC, ISP817XD) meet these exact specifications and are therefore direct parametric equivalents suitable for interchangeable use in circuit designs.

Parameter Comparison

Parameter	ISP817XB	ISP817XA	ISP817XC	ISP817XD
Manufacturer	Isocom Components 2004 LTD	Isocom Components 2004 LTD	Isocom Components 2004 LTD	Isocom Components 2004 LTD
Series	ISP817	ISP817	ISP817	ISP817
Number of Channels	1	1	1	1
Voltage - Isolation	5300Vrms	5300Vrms	5300Vrms	5300Vrms
Current Transfer Ratio (Min)	50% @ 5mA	50% @ 5mA	50% @ 5mA	50% @ 5mA
Current Transfer Ratio (Max)	600% @ 5mA	600% @ 5mA	600% @ 5mA	600% @ 5mA
Output Type	Transistor	Transistor	Transistor	Transistor
Voltage - Output (Max)	80V	80V	80V	80V
Current - Output / Channel	50mA	50mA	50mA	50mA
Vce Saturation (Max)	200mV	200mV	200mV	200mV
Rise / Fall Time (Typ)	4µs, 3µs	4µs, 3µs	4µs, 3µs	4µs, 3µs
Operating Temperature	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C	-55°C ~ 110°C
Package / Case	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)	4-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active
Inventory (Pcs)	1225	1280	1048	22400

Engineering Selection Recommendations

All substitute parts (ISP817XA, ISP817XC, ISP817XD) are parametric equivalents of the ISP817XB and are suitable for direct substitution in circuit applications. Selection among these parts should be based on the following factors:

Product Status and Compliance: All parts maintain Active product status and ROHS3 compliance, ensuring continued manufacturer support and regulatory alignment.

Inventory Availability: ISP817XD offers the highest inventory level at 22,400 units, providing superior supply chain security. ISP817XA and ISP817XC maintain adequate stock levels of 1280 and 1048 units respectively.

Packaging and Mounting: All substitute parts are supplied in 4-DIP through-hole packages with identical mechanical dimensions (0.300", 7.62mm), ensuring direct PCB compatibility without layout modifications.

Electrical Performance: All parts deliver identical electrical characteristics across isolation voltage, current transfer ratio, output voltage, saturation voltage, and switching speed parameters, confirming functional interchangeability.

Frequently Asked Questions (FAQ)

Q: Can ISP817XA, ISP817XC, and ISP817XD be used interchangeably with ISP817XB?

A: Yes. All parts are parametric equivalents within the ISP817 series, sharing identical electrical specifications for isolation voltage (5300Vrms), current transfer ratio (50% to 600% @ 5mA), output characteristics (80V max, 50mA per channel), and switching performance (4µs rise, 3µs fall time). They are suitable for direct substitution without circuit modification.

Q: Are there any package or mounting differences between these parts?

A: No. All parts use the 4-DIP through-hole package with identical dimensions (0.300", 7.62mm). PCB footprints and mounting procedures are identical across all variants.

Q: Do all substitute parts meet the same compliance standards?

A: Yes. All parts are ROHS3 compliant and maintain Active product status. They share identical REACH status (REACH Unaffected), ECCN classification (EAR99), and HTSUS code (8541.49.8000).

Q: What is the operating temperature range for these optoisolators?

A: All parts operate across the temperature range of -55°C to 110°C, providing consistent thermal performance across all ISP817 variants.

Q: Which substitute part offers the best supply chain availability?

A: ISP817XD provides the highest inventory level at 22,400 units, offering superior availability for high-volume applications or extended production runs.

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