ISP621-1BLSM Equivalent & Substitute Parts

Part Overview

The ISP621-1BLSM is an optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This single-channel device provides 5300Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation with transistor-based switching output. The component is currently in active production status with 963 units available in inventory. Substitute parts are identified when design requirements necessitate alternative sourcing due to supply constraints, inventory availability, or equivalent performance specifications across the same product series.

Substiute Parts

ISP621-1BLSM

Isocom Components 2004 LTDIn Stock: 1053ISP621-1BLSM Datasheet

Current PartRFQ

ISP621-1XBLSM

Isocom Components 2004 LTDIn Stock: 1205ISP621-1XBLSM Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the ISP621-1BLSM is determined by strict parametric equivalence within the ISP621-1 series. The following parameters establish the substitution criteria:

• Voltage - Isolation: 5300Vrms (mandatory match)
• Number of Channels: 1 (mandatory match)
• Current Transfer Ratio: 200% - 600% @ 5mA (mandatory match)
• Output Type: Transistor (mandatory match)
• Voltage - Output (Max): 55V (mandatory match)
• Current - Output / Channel: 50mA (mandatory match)
• Vce Saturation (Max): 400mV (mandatory match)
• Package / Case: 4-SMD, Gull Wing (mandatory match)
• Operating Temperature Range: -30°C ~ 100°C (mandatory match)

Parts meeting all these parameters are classified as parametric equivalents and direct substitutes within the same series designation.

Parameter Comparison

Engineering Selection Recommendations

Both ISP621-1BLSM and ISP621-1XBLSM are active production components from Isocom Components 2004 LTD with identical electrical and mechanical specifications. Selection between these parts is based on availability and supply chain requirements rather than performance differentiation. Both parts maintain ROHS3 compliance and REACH unaffected status, meeting current regulatory requirements. The ISP621-1XBLSM variant currently has higher inventory availability at 1176 units compared to 963 units for the ISP621-1BLSM, making it suitable for high-volume procurement scenarios where supply assurance is a priority.

Frequently Asked Questions (FAQ)

Q: Can ISP621-1XBLSM replace ISP621-1BLSM in existing designs?

A: Yes. Both parts are parametric equivalents with identical electrical characteristics, isolation voltage, current transfer ratios, output specifications, and package configuration. Direct substitution is supported without circuit modification.

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

A: No. Both ISP621-1BLSM and ISP621-1XBLSM provide 5300Vrms isolation voltage with identical current transfer ratio performance of 200% - 600% @ 5mA.

Q: Do both parts use the same package and mounting type?

A: Yes. Both components use 4-SMD, Gull Wing surface mount packaging with identical mechanical and electrical interface requirements.

Q: What is the operating temperature range for both parts?

A: Both ISP621-1BLSM and ISP621-1XBLSM operate across -30°C to 100°C, supporting equivalent thermal performance in system applications.

Q: Are regulatory certifications identical for both parts?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected, meeting equivalent regulatory requirements for industrial and commercial applications.

Q: What determines the choice between ISP621-1BLSM and ISP621-1XBLSM?

A: Selection is based on inventory availability and supply chain logistics. The ISP621-1XBLSM offers higher current stock levels, making it preferable for large-volume orders or time-sensitive procurement requirements.