LHIRS1-N-WH Infrared Wall Switch Sensor - Equivalent & Substitute Parts

Part Overview

The LHIRS1-N-WH is a passive infrared proximity/occupancy sensor manufactured by Thomas Research Products, designed for wall-mounted installation in the LightHAWK2™ series. This component operates on 120/277VAC supply voltage and provides relay output for occupancy detection across 1000 square feet of coverage area. The product is currently classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing system maintenance and component procurement.

Substiute Parts

LHIRS1-N-WH

Thomas Research ProductsIn Stock: 1230LHIRS1-N-WH Datasheet

Current PartRFQ

LHRIRS1-N-WH

Thomas Research ProductsIn Stock: 726LHRIRS1-N-WH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LHIRS1-N-WH is determined by the following critical parameters:

• Sensor Technology: Passive infrared detection capability
• Electrical Interface: Relay output configuration
• Supply Voltage Compatibility: 120/277VAC operation
• Mounting Configuration: Wall-mount form factor
• Physical Appearance: White color finish
• Regulatory Compliance: RoHS compliance status

The identified substitute part, LHRIRS1-N-WH, maintains compatibility across sensor type, output type, mounting type, color, and regulatory compliance. Variations in coverage area specification, operating temperature documentation, and manual override functionality are noted in the parameter comparison table below.

Parameter Comparison

Engineering Selection Recommendations

The LHRIRS1-N-WH qualifies as a functional substitute for the obsolete LHIRS1-N-WH based on matching sensor technology, relay output configuration, dual-voltage supply compatibility (120/277VAC), wall-mount installation method, and white finish. The substitute part maintains active product status within the Thomas Research Products portfolio, ensuring ongoing availability and support.

Differences in documented specifications—specifically the absence of coverage area and operating temperature range data for the substitute, and the removal of manual override functionality—require verification against system integration requirements prior to deployment. The substitute part's RoHS compliance status is not explicitly documented in available parameters.

Frequently Asked Questions (FAQ)

Q: Can LHRIRS1-N-WH directly replace LHIRS1-N-WH in existing installations?

A: Both components share passive infrared sensor technology, relay output, 120/277VAC supply voltage compatibility, wall-mount configuration, and white color finish. The substitute part is currently in active production status, whereas the original is obsolete. Functional compatibility depends on system-specific requirements regarding coverage area, operating temperature range, and manual override capability.

Q: What is the primary difference between these two part numbers?

A: The LHRIRS1-N-WH operates within the LightHAWK™ series (versus LightHAWK2™ for the original), lacks documented manual override functionality, and does not provide specified coverage area or operating temperature range parameters. Both maintain relay-based occupancy detection on wall-mounted installations.

Q: Are there packaging differences between the main part and substitute?

A: The main part (LHIRS1-N-WH) is specified with dash packaging notation, while the substitute (LHRIRS1-N-WH) is supplied in bulk packaging configuration.

Q: Does the substitute part meet RoHS compliance requirements?

A: The original LHIRS1-N-WH is explicitly RoHS compliant. RoHS compliance status for the LHRIRS1-N-WH substitute is not documented in the provided parameters.

Q: What voltage range does each part support?

A: Both parts support dual-voltage operation across the 120V to 277V range, suitable for standard North American electrical installations.