ISP321-4G Equivalent & Substitute Parts

Part Overview

The ISP321-4G is a quad-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 16-pin DIP component provides galvanic isolation up to 5300Vrms across four independent channels, each capable of 50mA output current. The device is classified as Active product status with full RoHS3 compliance and REACH unaffected designation. Substitute parts are identified when identical electrical and mechanical parameters are maintained across all critical specifications, ensuring direct functional equivalence in circuit applications.

Substiute Parts

ISP321-4G

Isocom Components 2004 LTDIn Stock: 959ISP321-4G Datasheet

Current PartRFQ

ISP321-4XG

Isocom Components 2004 LTDIn Stock: 976ISP321-4XG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISP321-4G is determined by strict equivalence across all electrical and mechanical parameters. The following criteria define acceptable substitute parts:

• Number of Channels: 4 channels required
• Voltage - Isolation: 5300Vrms minimum
• Current Transfer Ratio: 50% (Min) @ 5mA and 600% (Max) @ 5mA
• Output Type: Transistor output configuration
• Voltage - Output (Max): 80V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV
• Operating Temperature Range: -30°C ~ 100°C
• Package / Case: 16-DIP (0.400", 10.16mm)
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

Only parts matching all specified parameters across the ISP321-4 series are classified as parametric equivalents.

Parameter Comparison

Engineering Selection Recommendations

The ISP321-4XG is a direct parametric equivalent to the ISP321-4G. Both components share identical electrical specifications, mechanical packaging, and regulatory compliance status. Selection between these parts may be based on inventory availability and supply chain considerations. The ISP321-4G maintains 872 units in stock, while the ISP321-4XG maintains 941 units in stock. Both parts carry Active product status, ROHS3 compliance, and REACH unaffected designation, confirming suitability for equivalent circuit applications without design modification.

Frequently Asked Questions (FAQ)

Q: Can ISP321-4XG replace ISP321-4G in existing designs?

A: Yes. The ISP321-4XG is a parametric equivalent with identical electrical and mechanical specifications. No circuit redesign or board layout modification is required for direct substitution.

Q: Are there any differences in isolation voltage between these parts?

A: No. Both ISP321-4G and ISP321-4XG provide 5300Vrms isolation voltage across all four channels.

Q: Do these parts have the same package dimensions?

A: Yes. Both components use 16-DIP (0.400", 10.16mm) through-hole packaging with identical pin configurations and board footprints.

Q: Are both parts RoHS compliant?

A: Yes. Both ISP321-4G and ISP321-4XG are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the maximum output current per channel?

A: Both parts support 50mA maximum output current per channel with 80V maximum output voltage rating.

Q: Do these optoisolators require any special handling?

A: Both parts carry Moisture Sensitivity Level 1 (Unlimited), indicating no special moisture control measures are required during storage or handling.