ISP321-4BLSM Equivalent & Substitute Parts

Part Overview

The ISP321-4BLSM is a quad-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 16-pin surface mount device provides 5300Vrms isolation across four independent channels, each capable of 50mA output current. The component is classified as Active status and is ROHS3 compliant. Substitute parts are identified when they maintain identical electrical specifications, mechanical compatibility, and regulatory compliance across all critical parameters.

Substiute Parts

ISP321-4BLSM

Isocom Components 2004 LTDIn Stock: 1139ISP321-4BLSM Datasheet

Current PartRFQ

ISP321-4XBLSM

Isocom Components 2004 LTDIn Stock: 923ISP321-4XBLSM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISP321-4BLSM is determined by strict equivalence across the following critical parameters:

• Number of Channels: 4
• Voltage - Isolation: 5300Vrms
• Current Transfer Ratio: 200% (Min) to 600% (Max) @ 1mA
• Output Type: Transistor
• Voltage - Output (Max): 80V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV
• Rise / Fall Time: 4µs, 3µs
• Package / Case: 16-SMD, Gull Wing
• Operating Temperature: -30°C ~ 100°C
• RoHS Status: ROHS3 Compliant
• Moisture Sensitivity Level: 1 (Unlimited)

The ISP321-4XBLSM meets all these criteria and is classified as a parametric equivalent substitute.

Parameter Comparison

Engineering Selection Recommendations

Both ISP321-4BLSM and ISP321-4XBLSM are Active status components manufactured by Isocom Components 2004 LTD. Both devices are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements. The ISP321-4XBLSM is a direct parametric equivalent with identical electrical specifications, isolation voltage, output characteristics, and thermal operating range. Selection between these parts may be based on inventory availability and lead time considerations, as both are functionally interchangeable in applications requiring quad-channel 5300Vrms isolated transistor outputs.

Frequently Asked Questions (FAQ)

Q: Can ISP321-4XBLSM replace ISP321-4BLSM in existing designs?

A: Yes. The ISP321-4XBLSM is a parametric equivalent with identical electrical specifications, isolation voltage, output current ratings, switching characteristics, and package configuration. No circuit modifications are required.

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

A: No. Both parts provide 5300Vrms isolation across all four channels.

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

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

Q: Are the package dimensions identical?

A: Yes. Both parts use 16-SMD, Gull Wing surface mount packaging with identical mechanical specifications.

Q: What is the Current Transfer Ratio range for these optoisolators?

A: Both parts have a Current Transfer Ratio of 200% minimum to 600% maximum at 1mA input current.

Q: Are both parts RoHS compliant?

A: Yes. Both ISP321-4BLSM and ISP321-4XBLSM are ROHS3 compliant.

Q: What is the maximum Vce saturation voltage for these devices?

A: Both parts have a maximum Vce saturation of 400mV.

Q: Do these parts have the same operating temperature range?

A: Yes. Both parts operate from -30°C to 100°C.