ISP321-1BLSM Equivalent & Substitute Parts

Part Overview

The ISP321-1BLSM is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This single-channel device provides galvanic isolation rated at 5300Vrms and is designed for DC input applications requiring transistor-switched output. The component is currently in active production status with 706 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are maintained across all critical parameters, enabling seamless integration in applications where the primary part is unavailable or supply constraints exist.

Substiute Parts

ISP321-1BLSM

Isocom Components 2004 LTDIn Stock: 786ISP321-1BLSM Datasheet

Current PartRFQ

ISP321-1XBLSM

Isocom Components 2004 LTDIn Stock: 1241ISP321-1XBLSM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ISP321-1BLSM is determined by strict equivalence across the following critical parameters:

• Single-channel configuration with transistor output topology
• Isolation voltage rating of 5300Vrms
• Current transfer ratio range: 200% to 600% @ 1mA
• Maximum output voltage of 80V
• Maximum output current of 50mA per channel
• Vce saturation maximum of 400mV
• Surface mount 4-SMD package format (0.300", 7.62mm)
• Operating temperature range of -30°C to 100°C
• ROHS3 compliance and active product status

Parts meeting all these criteria are classified as parametric equivalents and direct substitutes.

Parameter Comparison

Engineering Selection Recommendations

The ISP321-1XBLSM is a direct parametric equivalent to the ISP321-1BLSM. Both parts are manufactured by Isocom Components 2004 LTD within the ISP321-1 series and maintain identical electrical specifications and mechanical packaging. Both components are active products with ROHS3 compliance certification. The ISP321-1XBLSM offers higher inventory availability at 1212 units compared to 706 units for the ISP321-1BLSM, making it suitable for applications where supply continuity is a consideration. Selection between these parts is based on availability and procurement lead time rather than functional or compliance differences.

Frequently Asked Questions (FAQ)

Q: Can ISP321-1XBLSM replace ISP321-1BLSM in existing designs?

A: Yes. The ISP321-1XBLSM is a parametric equivalent with identical isolation voltage, current transfer ratio, output voltage and current ratings, saturation characteristics, operating temperature range, and package format. No circuit modifications are required.

Q: Are there any differences in compliance or certifications?

A: No. Both parts carry identical ROHS3 compliance status, REACH unaffected designation, and EAR99 ECCN classification. Moisture sensitivity level is 1 (Unlimited) for both components.

Q: What determines substitutability for ISP321-1BLSM optoisolators?

A: Substitutability is determined by matching the isolation voltage rating (5300Vrms), current transfer ratio range (200-600% @ 1mA), transistor output configuration, maximum output specifications (80V, 50mA), saturation voltage (400mV maximum), operating temperature range (-30°C to 100°C), and 4-SMD surface mount package format.

Q: Does packaging differ between these parts?

A: No. Both ISP321-1BLSM and ISP321-1XBLSM use identical 4-SMD packaging with 0.300" (7.62mm) dimensions and surface mount mounting type. PCB layout and reflow profiles remain unchanged.

Q: What is the inventory status for each part?

A: ISP321-1BLSM has 706 units in stock, while ISP321-1XBLSM has 1212 units available. Both are new original components in active production.