ISP321-4BL Equivalent & Substitute Parts

Part Overview

The ISP321-4BL 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 unlimited moisture sensitivity rating. Substitute parts are identified when identical electrical specifications, isolation ratings, channel configuration, and package geometry are maintained across the same product series.

Substiute Parts

ISP321-4BL

Isocom Components 2004 LTDIn Stock: 851ISP321-4BL Datasheet

Current PartRFQ

ISP321-4XBL

Isocom Components 2004 LTDIn Stock: 963ISP321-4XBL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISP321-4BL is determined by strict equivalence across the following critical parameters:

• Isolation Voltage: 5300Vrms (galvanic isolation specification)
• Channel Configuration: 4 independent channels
• Output Type: Transistor output topology
• Current Transfer Ratio Range: 200% to 600% @ 1mA
• Maximum Output Current: 50mA per channel
• Package Geometry: 16-DIP (0.300", 7.62mm)
• Mounting Technology: Through Hole
• Operating Temperature Range: -30°C ~ 100°C
• Compliance Status: RoHS3 Compliant, REACH Unaffected

The ISP321-4XBL meets all substitution criteria as a parametric equivalent within the ISP321-4 series, maintaining identical electrical performance and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both ISP321-4BL and ISP321-4XBL are Active product status components manufactured by Isocom Components 2004 LTD within the ISP321-4 series. Both parts maintain full RoHS3 compliance and REACH unaffected status. The ISP321-4XBL is a direct parametric equivalent suitable for applications requiring identical electrical performance, isolation voltage, channel count, and package footprint. Selection between these parts may be based on inventory availability, supplier lead time, or procurement requirements, as all technical specifications and compliance certifications are equivalent.

Frequently Asked Questions (FAQ)

Q: Can ISP321-4XBL replace ISP321-4BL in existing designs?

A: Yes. The ISP321-4XBL is a parametric equivalent with identical electrical specifications, isolation rating, channel configuration, output current capability, and 16-DIP package geometry. No circuit modifications are required.

Q: Are the isolation voltage ratings identical?

A: Yes. Both parts provide 5300Vrms galvanic isolation across all four channels.

Q: Do both parts support the same output current per channel?

A: Yes. Both ISP321-4BL and ISP321-4XBL are rated for 50mA maximum output current per channel.

Q: Is the package footprint identical?

A: Yes. Both parts use 16-DIP (0.300", 7.62mm) through-hole package geometry with identical pin spacing and mounting requirements.

Q: Are compliance certifications equivalent?

A: Yes. Both parts are RoHS3 compliant, REACH unaffected, and carry identical regulatory status.

Q: What is the current transfer ratio specification?

A: Both parts specify a current transfer ratio range of 200% to 600% at 1mA input current.

Q: Are the operating temperature ranges the same?

A: Yes. Both parts operate across -30°C to 100°C temperature range.