LCA715S Solid State Relay - Equivalent & Substitute Parts

Part Overview

The LCA715S is an active SPST-NO (1 Form A) solid state relay manufactured by IXYS Integrated Circuits Division, operating in the OptoMOS® series. This surface mount component is rated for 2.2A load current at 0-60V with a 1.2VDC input trigger voltage. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1), making it suitable for industrial and commercial switching applications requiring galvanic isolation between control and load circuits.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter ranges for this product category.

Substiute Parts

LCA715S

IXYS Integrated Circuits DivisionIn Stock: 1498LCA715S Datasheet

Current PartRFQ

ASSR-1511-301E

Broadcom LimitedIn Stock: 1342ASSR-1511-301E Datasheet

MFR RecommendedRFQ

ASSR-1511-501E

Broadcom LimitedIn Stock: 4336ASSR-1511-501E Datasheet

MFR RecommendedRFQ

ASSR-1611-301E

Broadcom LimitedIn Stock: 1441ASSR-1611-301E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LCA715S is determined by strict adherence to the following electrical and mechanical parameters:

Primary Compatibility Criteria:

• Circuit configuration must remain SPST-NO (1 Form A)
• Load voltage range must encompass 0 V ~ 60 V
• Package type must be 6-SMD (0.300", 7.62mm) with gull wing termination
• Output type must support both AC and DC loads
• Mounting type must be surface mount
• RoHS3 compliance and MSL 1 rating required

Load Current Consideration: Substitute parts with load current ratings of 1A or higher are acceptable when the application does not require the full 2.2A capacity of the LCA715S. Parts rated below 2.2A represent current-limited alternatives suitable for lower-power switching scenarios.

On-State Resistance: Substitute parts with on-state resistance up to 500 mOhms are acceptable. Higher resistance values increase conduction losses but do not prevent functional substitution in applications where thermal dissipation is adequate.

Input Voltage: Substitute parts with input voltage requirements of 1.3VDC or lower are acceptable, as standard logic-level control signals (3.3V, 5V) will reliably trigger these devices.

Parameter Comparison

Engineering Selection Recommendations

ASSR-1611-301E is the primary substitute for direct replacement of the LCA715S. This part exceeds the load current specification (2.5A vs. 2.2A) and provides superior on-state resistance (100 mOhms vs. 150 mOhms), resulting in lower conduction losses. All electrical and mechanical parameters align with the LCA715S requirements. Both parts are ROHS3 compliant, carry MSL 1 rating, and maintain active product status.

ASSR-1511-301E and ASSR-1511-501E are current-limited alternatives suitable for applications where load current does not exceed 1A. These parts maintain full voltage range compatibility (0-60V) and package compatibility but exhibit higher on-state resistance (500 mOhms). The primary distinction between these two is packaging format: ASSR-1511-301E is supplied in tube packaging, while ASSR-1511-501E is supplied in cut tape and digi-reel format. Both are ROHS3 compliant with MSL 1 rating and active product status.

Selection between substitute options depends on application load current requirements and packaging logistics. All substitute parts maintain the same circuit topology, voltage ratings, and compliance certifications as the LCA715S.

Frequently Asked Questions (FAQ)

Q: Can ASSR-1511-301E or ASSR-1511-501E replace the LCA715S in all applications?

A: These parts are suitable only for applications where load current does not exceed 1A. The LCA715S is rated for 2.2A continuous current. If your application requires the full 2.2A capacity, use ASSR-1611-301E instead.

Q: What is the difference between ASSR-1511-301E and ASSR-1511-501E?

A: Both parts are electrically identical with the same electrical specifications. The difference is packaging format: ASSR-1511-301E is supplied in tube packaging, while ASSR-1511-501E is supplied in cut tape and digi-reel format. Select based on your assembly process requirements.

Q: Does higher on-state resistance in the ASSR-1511 series affect performance?

A: On-state resistance of 500 mOhms (versus 150 mOhms in the LCA715S) increases conduction losses. At 1A load current, this results in higher heat dissipation. Verify that your PCB thermal design accommodates this increased power loss if selecting the ASSR-1511 series.

Q: Are all substitute parts pin-compatible with the LCA715S?

A: All substitute parts use the same 6-SMD (0.300", 7.62mm) package with gull wing termination. PCB footprints are mechanically compatible. Verify pinout assignment in device datasheets before assembly.

Q: Do substitute parts maintain the same compliance certifications?

A: All substitute parts listed are ROHS3 compliant, carry MSL 1 (unlimited) moisture sensitivity rating, and maintain active product status. Compliance certifications are equivalent to the LCA715S.

Q: Can I use ASSR-1611-301E as a direct drop-in replacement?

A: Yes. ASSR-1611-301E meets or exceeds all electrical and mechanical specifications of the LCA715S. It provides higher load current capacity (2.5A) and lower on-state resistance (100 mOhms), making it suitable for direct substitution in existing designs.