LDA211S Equivalent & Substitute Parts

Part Overview

The LDA211S is a 2-channel optoisolator with Darlington output manufactured by IXYS Integrated Circuits Division. It provides 3750Vrms isolation voltage and is designed for DC input applications requiring galvanic isolation. The device is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system support and new design implementations.

Substiute Parts

LDA211S

IXYS Integrated Circuits DivisionIn Stock: 848LDA211S Datasheet

Current PartRFQ

ILD55-X007

Vishay Semiconductor Opto DivisionIn Stock: 2512ILD55-X007 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LDA211S is based on the following critical parameters:

• Channel Configuration: Both main and substitute parts must provide 2-channel isolation
• Output Architecture: Darlington output topology is required for functional equivalence
• Package Type: 8-SMD, Gull Wing surface mount package ensures mechanical and electrical compatibility
• Isolation Voltage: Substitute parts must meet or exceed the 3750Vrms isolation requirement
• Input Type: DC input specification must be maintained
• Saturation Voltage: Vce(sat) performance at 1V maximum ensures switching characteristics compatibility

The ILD55-X007 meets all substitution criteria with enhanced isolation voltage (5300Vrms) and extended operating temperature range, while maintaining identical package geometry and channel configuration.

Parameter Comparison

Engineering Selection Recommendations

The ILD55-X007 is a direct substitute for the obsolete LDA211S based on compliance and certification alignment. Both devices are ROHS3 compliant and REACH unaffected, ensuring regulatory consistency. The ILD55-X007 provides superior electrical performance with higher isolation voltage (5300Vrms vs 3750Vrms) and extended operating temperature range (-55°C to 100°C vs -40°C to 85°C), making it suitable for applications requiring the LDA211S functionality with enhanced environmental tolerance. Pin-compatible 8-SMD, Gull Wing packaging enables direct board-level replacement without layout modification.

Frequently Asked Questions (FAQ)

Q: Can the ILD55-X007 directly replace the LDA211S in existing designs?

A: Yes. Both devices share identical 8-SMD, Gull Wing package geometry, 2-channel Darlington output configuration, and 1V maximum Vce saturation. The ILD55-X007 meets all electrical requirements of the LDA211S with enhanced isolation voltage and operating temperature range.

Q: What are the key differences between these optoisolators?

A: The ILD55-X007 provides higher isolation voltage (5300Vrms vs 3750Vrms), higher maximum output voltage (55V vs 30V), wider operating temperature range (-55°C to 100°C vs -40°C to 85°C), and higher output current capability (125mA vs unspecified). These enhancements make it suitable for more demanding applications while maintaining backward compatibility.

Q: Are there any package considerations for substitution?

A: Both parts use identical 8-SMD, Gull Wing surface mount packaging. No PCB layout or assembly process modifications are required for substitution.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the LDA211S and ILD55-X007 are ROHS3 compliant, REACH unaffected, and classified under the same ECCN (EAR99) and HTSUS (8541.49.8000) codes.

Q: What is the product status of the substitute part?

A: The ILD55-X007 is classified as Last Time Buy, indicating limited future availability. For long-term supply assurance, verify current inventory status with your component supplier.