ISP321-4BLSMT&R Equivalent & Substitute Parts

Part Overview

The ISP321-4BLSMT&R 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, designed for applications requiring high-voltage galvanic isolation with DC input control. The part is currently in active production status with 809 units available in inventory. Substitute parts are identified when identical electrical and mechanical specifications are maintained across all critical parameters, ensuring direct functional equivalence in circuit applications.

Substiute Parts

ISP321-4BLSMT&R

Isocom Components 2004 LTDIn Stock: 889ISP321-4BLSMT&R Datasheet

Current PartRFQ

ISP321-4XBLSMT&R

Isocom Components 2004 LTDIn Stock: 1789ISP321-4XBLSMT&R Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The ISP321-4BLSMT&R has one identified parametric equivalent: ISP321-4XBLSMT&R. This substitute relationship is established based on strict equivalence across all electrical and mechanical parameters. Both parts share identical specifications for isolation voltage (5300Vrms), current transfer ratio range (200%-600% @ 1mA), output characteristics (80V max, 50mA per channel), switching performance (4µs rise, 3µs fall time), temperature operating range (-30°C to 100°C), and physical packaging (16-SMD, Gull Wing surface mount). The substitution criteria are based exclusively on these matching parameters: channel count, isolation rating, transistor output configuration, saturation voltage, and package form factor. Both parts maintain identical compliance certifications (ROHS3, MSL Level 1) and active product status.

Parameter Comparison

Engineering Selection Recommendations

Both the ISP321-4BLSMT&R and ISP321-4XBLSMT&R are active production parts from Isocom Components 2004 LTD with full ROHS3 compliance and MSL Level 1 rating. Selection between these parts may be based on inventory availability: ISP321-4BLSMT&R has 809 units in stock, while ISP321-4XBLSMT&R has 1684 units available. Both parts meet identical electrical specifications and physical packaging requirements, making them functionally interchangeable in all circuit applications. The choice between variants should consider supply chain requirements and lead time considerations, as all technical parameters are equivalent.

Frequently Asked Questions (FAQ)

Q: Can ISP321-4XBLSMT&R be used as a direct replacement for ISP321-4BLSMT&R?

A: Yes. Both parts are parametric equivalents with identical electrical and mechanical specifications across all critical parameters including isolation voltage, current transfer ratio, output voltage and current ratings, switching times, operating temperature range, and package configuration.

Q: Are there any differences in the 16-SMD package between these parts?

A: No. Both parts use identical 16-SMD Gull Wing surface mount packaging with the same physical dimensions and pin configuration, ensuring compatibility with existing PCB layouts and assembly processes.

Q: Do both parts have the same compliance certifications?

A: Yes. Both ISP321-4BLSMT&R and ISP321-4XBLSMT&R are ROHS3 compliant with MSL Level 1 rating, REACH unaffected status, and EAR99 ECCN classification.

Q: What is the difference between the "B" and "X" designations in the part numbers?

A: The provided data does not specify the technical distinction between the "B" and "X" designations. Both parts maintain identical electrical and mechanical parameters as documented in the specifications.

Q: Are these parts suitable for high-voltage isolation applications?

A: Yes. Both parts provide 5300Vrms isolation rating across four independent channels, suitable for applications requiring galvanic isolation in high-voltage environments.

Q: What is the maximum output current per channel?

A: The maximum output current per channel is 50mA for both parts, with a maximum output voltage of 80V and saturation voltage of 400mV.