ISP321-1BLG Equivalent & Substitute Parts

Part Overview

The ISP321-1BLG 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 active in production with 843 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

ISP321-1BLG

Isocom Components 2004 LTDIn Stock: 923ISP321-1BLG Datasheet

Current PartRFQ

ISP321-1XBLG

Isocom Components 2004 LTDIn Stock: 1203ISP321-1XBLG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

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

• Voltage - Isolation: 5300Vrms
• Number of Channels: 1
• Current Transfer Ratio range: 200% to 600% @ 1mA
• Output Type: Transistor
• Voltage - Output (Max): 80V
• Current - Output / Channel: 50mA
• Vce Saturation (Max): 400mV
• Operating Temperature range: -30°C ~ 100°C
• Package / Case: 4-DIP (0.400", 10.16mm)
• Mounting Type: Through Hole

The ISP321-1XBLG 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 ISP321-1BLG and ISP321-1XBLG are active production components from Isocom Components 2004 LTD with identical electrical and mechanical specifications. Both parts maintain ROHS3 compliance and REACH unaffected status. Selection between these parts may be based on inventory availability: ISP321-1BLG has 843 units in stock, while ISP321-1XBLG has 1159 units in stock. Both are supplied in tube packaging with identical 4-DIP through-hole configuration, ensuring direct PCB compatibility without design modification.

Frequently Asked Questions (FAQ)

Q: Can ISP321-1XBLG replace ISP321-1BLG in existing designs?

A: Yes. Both parts are parametric equivalents with identical isolation voltage (5300Vrms), current transfer ratio (200-600% @ 1mA), output characteristics (80V max, 50mA per channel), and 4-DIP through-hole package. No circuit redesign is required.

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

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical ECCN (EAR99) and HTSUS (8541.49.8000) classifications.

Q: What is the significance of the part number suffix difference (BLG vs XBLG)?

A: The suffix variation indicates different manufacturing batches or packaging configurations within the ISP321-1 series. Electrical and mechanical parameters remain identical.

Q: Are both parts suitable for the same operating temperature range?

A: Yes. Both ISP321-1BLG and ISP321-1XBLG operate across -30°C to 100°C, with identical rise/fall times (4µs, 3µs) and saturation characteristics (400mV max Vce).

Q: Can these parts be used interchangeably on the same PCB?

A: Yes. Both parts use identical 4-DIP (0.400", 10.16mm) through-hole packaging with the same pin configuration, enabling direct socket substitution.