ISP521-2BLG Equivalent & Substitute Parts

Part Overview

The ISP521-2BLG is a dual-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 8-DIP through-hole component provides galvanic isolation up to 5300Vrms and is designed for applications requiring isolated signal switching and control. The part is currently active in production with 942 units in stock. Substitute parts are identified based on matching electrical specifications, isolation ratings, channel configuration, and package compatibility to ensure direct functional replacement in circuit designs.

Substiute Parts

ISP521-2BLG

Isocom Components 2004 LTDIn Stock: 1028ISP521-2BLG Datasheet

Current PartRFQ

ISP521-2XBLG

Isocom Components 2004 LTDIn Stock: 872ISP521-2XBLG Datasheet

Parametric EquivalentRFQ

TLP521-2XBLG

Isocom Components 2004 LTDIn Stock: 1102TLP521-2XBLG Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the ISP521-2BLG are qualified based on the following critical parameters that determine functional equivalence:

• Number of Channels: 2 channels (dual configuration)
• Voltage - Isolation: 5300Vrms minimum
• Current Transfer Ratio: 200% minimum @ 1mA
• Output Type: Transistor output
• Voltage - Output (Max): 55V or greater
• Current - Output / Channel: 50mA or greater
• Package / Case: 8-DIP (0.400", 10.16mm)
• Mounting Type: Through Hole
• Operating Temperature Range: -30°C ~ 100°C or wider
• RoHS Status: ROHS3 Compliant

All identified substitutes meet or exceed these parameters, ensuring pin-compatible and functionally equivalent operation in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

All three parts—ISP521-2BLG, ISP521-2XBLG, and TLP521-2XBLG—are active products with ROHS3 compliance and REACH unaffected status, making them suitable for current production and regulatory requirements. Selection between these parts should be based on availability and supply chain considerations. The ISP521-2BLG and ISP521-2XBLG share identical series designation and specifications, with ISP521-2XBLG offering 835 units in stock. The TLP521-2XBLG, from the TLP521-2 series, provides the highest inventory level at 1018 units while maintaining all critical electrical and mechanical parameters. All parts are suitable for through-hole PCB assembly and operate within the specified temperature range of -30°C to 100°C.

Frequently Asked Questions (FAQ)

Q: Can ISP521-2XBLG directly replace ISP521-2BLG?

A: Yes. Both parts share identical electrical specifications, isolation voltage, channel configuration, current transfer ratios, and 8-DIP package dimensions. They are pin-compatible and functionally equivalent.

Q: Is TLP521-2XBLG compatible with ISP521-2BLG in existing designs?

A: Yes. TLP521-2XBLG meets all critical parameters: dual channels, 5300Vrms isolation, 200-600% current transfer ratio, 55V maximum output voltage, 50mA per-channel current, and 8-DIP through-hole package. The TLP521-2 series designation indicates a different product line, but electrical and mechanical compatibility is maintained.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by: dual-channel configuration, 5300Vrms isolation rating, transistor output type, 200% minimum current transfer ratio, 55V maximum output voltage, 50mA per-channel current capacity, 8-DIP package format, through-hole mounting, and -30°C to 100°C operating temperature range.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. ISP521-2BLG, ISP521-2XBLG, and TLP521-2XBLG are all ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: What is the difference between ISP521-2 and TLP521-2 series?

A: Both series are manufactured by Isocom Components 2004 LTD and share identical electrical specifications for the dual-channel, 5300Vrms isolation configuration. Series designation reflects internal product line organization but does not affect functional equivalence or pin compatibility.