LAA710STR Equivalent & Substitute Parts

Part Overview

The LAA710STR is an OptoMOS® solid state relay manufactured by IXYS Integrated Circuits Division. This SPST-NO (1 Form A) x 2 configuration operates as a surface mount device in an 8-SMD package with a 0.300" (7.62mm) body. The device is designed for switching applications requiring low input voltage control of AC and DC loads up to 60V at 1A maximum load current. The part maintains active product status with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Equivalent and substitute parts are identified when they meet the same electrical switching requirements, package footprint, and operational voltage specifications.

Substiute Parts

LAA710STR

IXYS Integrated Circuits DivisionIn Stock: 1896LAA710STR Datasheet

Current PartRFQ

ASSR-1420-302E

Broadcom LimitedIn Stock: 1624ASSR-1420-302E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LAA710STR is determined by the following critical parameters:

• Circuit Configuration: Must be SPST-NO (1 Form A) x 2 to maintain functional equivalence
• Package Footprint: Must be 8-SMD (0.300", 7.62mm) with Gull Wing termination for PCB compatibility
• Load Voltage Range: Must support 0V ~ 60V operation
• Input Voltage: Must operate at or near 1.2VDC control voltage
• Output Type: Must support both AC and DC load switching
• Load Current Capability: Must meet or exceed the application's current requirements up to 1A
• Compliance: Must maintain RoHS3 compliance and MSL 1 rating

The ASSR-1420-302E from Broadcom Limited meets these substitution criteria with identical package geometry, circuit configuration, and voltage specifications. While the load current rating is reduced to 600mA and on-state resistance is increased to 1 Ohm, these parameters remain within acceptable substitution boundaries for applications not requiring the full 1A capacity.

Parameter Comparison

Engineering Selection Recommendations

Both the LAA710STR and ASSR-1420-302E maintain active product status with full RoHS3 compliance and identical moisture sensitivity ratings. Selection between these parts depends on application-specific load current requirements:

• LAA710STR: Select when load current approaches or exceeds 600mA, or when on-state resistance must remain below 500 mOhms to minimize thermal dissipation
• ASSR-1420-302E: Select when load current remains below 600mA and higher on-state resistance (1 Ohm maximum) is acceptable for the application

Both devices support identical voltage ranges (0V ~ 60V load, 1.2V ~ 1.3V input) and package footprints, ensuring direct PCB compatibility. The 0.1VDC input voltage difference between parts is negligible for standard control circuit design.

Frequently Asked Questions (FAQ)

Q: Can the ASSR-1420-302E directly replace the LAA710STR on the same PCB?

A: Yes. Both parts use identical 8-SMD (0.300", 7.62mm) packages with Gull Wing termination, ensuring direct footprint compatibility without PCB redesign.

Q: What is the primary difference between these two parts?

A: The ASSR-1420-302E has a reduced maximum load current rating (600mA vs. 1A) and higher on-state resistance (1 Ohm vs. 500 mOhms). These differences affect maximum switching capacity and thermal performance but do not impact circuit compatibility.

Q: Are the input voltage specifications compatible?

A: Yes. The LAA710STR requires 1.2VDC input while the ASSR-1420-302E requires 1.3VDC input. This 0.1VDC difference is within standard control circuit tolerances and does not require circuit modification.

Q: Do both parts support AC and DC load switching?

A: Yes. Both the LAA710STR and ASSR-1420-302E are rated for AC and DC load switching across the 0V ~ 60V range.

Q: Which part should I select for a 800mA load application?

A: The LAA710STR is the appropriate selection, as the ASSR-1420-302E is rated to 600mA maximum and would exceed its current specification.

Q: Are there any compliance or certification differences?

A: No. Both parts maintain identical RoHS3 compliance, MSL 1 (Unlimited) moisture sensitivity ratings, and REACH unaffected status.