LH1502BAC Equivalent & Substitute Parts

Part Overview

The LH1502BAC is a solid-state relay manufactured by Vishay Semiconductor Opto Division. It functions as a SPST-NO/NC (1 Form A and B) switching device rated for 150 mA load current across 0–350 V AC/DC applications. The device is surface-mounted in an 8-SMD (0.300", 7.62mm) package with gull wing termination and operates across the industrial temperature range of −40°C to 85°C. The part is active in production status with ROHS3 compliance and carries multiple international approvals including CQC, FIMKO, UL, and VDE certifications. Equivalent and substitute parts are identified when they share identical or compatible electrical specifications, mechanical packaging, and functional circuit configurations, enabling direct replacement in existing designs or procurement alternatives when primary inventory is unavailable.

Substiute Parts

LH1502BAC

Vishay Semiconductor Opto DivisionIn Stock: 1244LH1502BAC Datasheet

Current PartRFQ

AQW610EHA

Panasonic Electric WorksIn Stock: 816AQW610EHA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the LH1502BAC is determined by strict alignment of the following critical parameters:

Circuit Configuration: The substitute part must provide SPST-NO + SPST-NC (1 Form A and B) functionality to maintain equivalent switching capability.

Package and Termination: The substitute must use 8-SMD (0.300", 7.62mm) surface-mount packaging with gull wing termination to ensure mechanical and electrical compatibility with existing PCB layouts.

Voltage Ratings: The substitute must support load voltage operation across 0–350 V for both AC and DC applications.

Load Current: The substitute must support a minimum load current rating of 150 mA or higher to handle the specified electrical load.

Input Voltage: The substitute must operate with input voltage at or below 1.26 VDC to ensure compatibility with control signal sources.

Environmental and Compliance: The substitute must maintain ROHS3 compliance and REACH unaffected status to satisfy regulatory requirements.

Operating Temperature: The substitute must support the industrial temperature range of −40°C to 85°C.

The AQW610EHA from Panasonic Electric Works meets all substitution criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

Both the LH1502BAC and AQW610EHA are active production parts with ROHS3 compliance and REACH unaffected status, satisfying current regulatory requirements for industrial and commercial applications. Both devices carry identical operating temperature ranges (−40°C to 85°C) and load voltage specifications (0–350 V AC/DC), ensuring functional equivalence in temperature-controlled environments.

The AQW610EHA operates with a lower input voltage requirement (1.14 VDC versus 1.26 VDC) and lower maximum load current rating (120 mA versus 150 mA). These differences are compatible with applications where the load current does not exceed 120 mA and control signal sources provide input voltage at or above 1.14 VDC. The slightly higher on-state resistance of the AQW610EHA (25 Ohms maximum versus 20 Ohms maximum) results in marginally increased power dissipation but remains within acceptable limits for the specified load current range.

Selection between these parts depends on application-specific load current requirements. The LH1502BAC is suitable for applications requiring the full 150 mA capacity. The AQW610EHA is suitable for applications with load currents up to 120 mA and provides an alternative sourcing option when LH1502BAC inventory is constrained.

Frequently Asked Questions (FAQ)

Q: Can the AQW610EHA directly replace the LH1502BAC in existing designs?

A: Direct replacement is possible when the application load current does not exceed 120 mA and the control signal source provides input voltage at or above 1.14 VDC. The identical package, termination style, circuit configuration, and load voltage ratings ensure mechanical and electrical compatibility. No PCB layout modifications are required.

Q: What is the impact of the lower load current rating on the AQW610EHA?

A: The AQW610EHA is rated for a maximum of 120 mA continuous load current, compared to 150 mA for the LH1502BAC. Applications operating at or below 120 mA experience no functional impact. Applications requiring load currents between 120 mA and 150 mA must use the LH1502BAC.

Q: How does the on-state resistance difference affect circuit performance?

A: The AQW610EHA has a maximum on-state resistance of 25 Ohms compared to 20 Ohms for the LH1502BAC. At 120 mA load current, this results in approximately 0.3 W additional power dissipation in the AQW610EHA. For most industrial applications, this difference is negligible and does not require thermal management modifications.

Q: Are both parts suitable for AC and DC load switching?

A: Yes. Both the LH1502BAC and AQW610EHA support AC and DC output types across the 0–350 V load voltage range, enabling use in both AC and DC switching applications.

Q: Do both parts meet the same regulatory and compliance standards?

A: Both parts are ROHS3 compliant and REACH unaffected. Both operate across the industrial temperature range of −40°C to 85°C. The LH1502BAC carries CQC, FIMKO, UL, and VDE approvals. Compliance documentation should be verified for specific application requirements.

Q: What is the moisture sensitivity level difference between these parts?

A: The LH1502BAC has a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions. The AQW610EHA lists MSL as Not Applicable. Both parts can be stored and handled without special moisture control measures.

Q: Are there any package or footprint differences between these parts?

A: No. Both parts use identical 8-SMD (0.300", 7.62mm) surface-mount packaging with gull wing termination. PCB footprints and reflow soldering profiles are interchangeable.