ISP321-1BL Equivalent & Substitute Parts

Part Overview

The ISP321-1BL is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This single-channel device provides galvanic isolation rated at 5300Vrms in a 4-DIP through-hole package. The component is currently in active production status with 962 units in stock. Substitute parts are identified when equivalent electrical and mechanical parameters are maintained across the same product series, enabling direct replacement in circuit designs without functional compromise.

Substiute Parts

ISP321-1BL

Isocom Components 2004 LTDIn Stock: 999ISP321-1BL Datasheet

Current PartRFQ

ISP321-1XBL

Isocom Components 2004 LTDIn Stock: 1172ISP321-1XBL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISP321-1BL is determined by strict equivalence across the following critical parameters:

• Voltage - Isolation: 5300Vrms
• Number of Channels: 1
• Output Type: Transistor
• Current Transfer Ratio range: 200% to 600% @ 1mA
• Voltage - Output (Max): 80V
• Current - Output / Channel: 50mA
• Package / Case: 4-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole
• Operating Temperature: -30°C ~ 100°C

The ISP321-1XBL meets all substitution criteria as a parametric equivalent within the ISP321-1 series, maintaining identical electrical performance and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both ISP321-1BL and ISP321-1XBL are active production components from Isocom Components 2004 LTD with identical electrical specifications and mechanical form factors. Selection between these parts is based on availability and supply chain requirements rather than functional differences. Both components maintain ROHS3 compliance and are suitable for applications requiring single-channel optoisolation at 5300Vrms with transistor output in 4-DIP through-hole packages. Current inventory levels are 962 units for ISP321-1BL and 1086 units for ISP321-1XBL.

Frequently Asked Questions (FAQ)

Q: Can ISP321-1XBL replace ISP321-1BL in existing designs?

A: Yes. The ISP321-1XBL is a parametric equivalent with identical isolation voltage, current transfer ratio, output voltage, output current, saturation voltage, operating temperature range, and package configuration. Direct substitution is supported without circuit modification.

Q: Are there any differences in compliance or certification between these parts?

A: No. Both parts maintain ROHS3 compliance, identical REACH status, and equivalent moisture sensitivity levels. Regulatory and environmental compliance is equivalent.

Q: What determines substitution eligibility for ISP321-1 series optoisolators?

A: Substitution requires matching isolation voltage (5300Vrms), channel count (1), output type (transistor), current transfer ratio range (200-600% @ 1mA), maximum output voltage (80V), maximum output current (50mA), package type (4-DIP), and operating temperature range (-30°C to 100°C).

Q: Are both parts available in the same packaging format?

A: Yes. Both ISP321-1BL and ISP321-1XBL are supplied in tube packaging with 4-DIP (0.300", 7.62mm) through-hole configuration, enabling identical PCB assembly processes.