LAA127 Solid State Relay - Equivalent & Substitute Parts

Part Overview

The LAA127 is an active solid state relay (SSR) manufactured by IXYS Integrated Circuits Division, configured as a SPST-NO (Single Pole Single Throw - Normally Open) relay with dual channels in an 8-DIP package. This component is designed for AC and DC load switching applications with a maximum load current of 200 mA and load voltage range of 0 V to 250 V. The part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1). Equivalent parts are identified when they maintain compatible electrical specifications, mechanical packaging, and functional circuit configuration while meeting the same compliance standards.

Substiute Parts

LAA127

IXYS Integrated Circuits DivisionIn Stock: 1829LAA127 Datasheet

Current PartRFQ

LH1522AB

Vishay Semiconductor Opto DivisionIn Stock: 23556LH1522AB Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LAA127 is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A) x 2 dual-channel configuration
• Package Type: Must be 8-DIP (0.300", 7.62mm) for PCB compatibility
• Mounting Method: Must be Through Hole termination with PC Pin style
• Load Voltage Range: Substitute must support the required load voltage window
• Load Current Capacity: Substitute must meet or exceed the 200 mA requirement
• Input Voltage: Must be compatible with 1.2 VDC control signal
• Output Type: Must support both AC and DC load switching
• Compliance: Must maintain ROHS3 compliance and MSL 1 rating

The LH1522AB from Vishay Semiconductor Opto Division qualifies as a manufacturer-recommended substitute based on matching circuit topology, package footprint, termination style, and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The LH1522AB is designated as the manufacturer-recommended substitute for the LAA127. Both components maintain identical circuit topology, package footprint, and compliance certifications (ROHS3, MSL 1, REACH Unaffected, EAR99 classification).

Selection between these parts must account for application-specific load requirements. The LAA127 supports load voltages up to 250 V and load currents up to 200 mA. The LH1522AB operates within a reduced envelope: maximum load voltage of 200 V and maximum load current of 120 mA. Component selection must ensure that the chosen part's electrical ratings meet or exceed the application's actual load specifications.

Both parts are active products with current manufacturing status and established supply availability.

Frequently Asked Questions (FAQ)

Q: Can the LH1522AB directly replace the LAA127 in all applications?

A: Direct replacement is possible only when the application load voltage does not exceed 200 V and load current does not exceed 120 mA. If the application requires the full 250 V load voltage or 200 mA load current capability of the LAA127, the LH1522AB is not suitable.

Q: Are the package footprints identical between LAA127 and LH1522AB?

A: Yes. Both components use the 8-DIP (0.300", 7.62mm) package with PC Pin termination style, enabling direct PCB footprint compatibility without layout modifications.

Q: Do both parts support the same control signal voltage?

A: Both parts operate with compatible input voltages. The LAA127 requires 1.2 VDC and the LH1522AB requires 1.26 VDC. These specifications are compatible with standard logic-level control circuits.

Q: What compliance certifications apply to both parts?

A: Both the LAA127 and LH1522AB are ROHS3 compliant, carry MSL 1 (unlimited moisture sensitivity), are REACH unaffected, and are classified as EAR99 for export control purposes.

Q: Can both parts switch AC and DC loads?

A: Yes. Both the LAA127 and LH1522AB are rated for AC and DC load switching applications.

Q: What is the on-state resistance specification for both parts?

A: Both components specify a maximum on-state resistance of 10 Ohms.