SI-LM40LA18D Equivalent & Substitute Parts

Part Overview

The SI-LM40LA18D is a DPST safety limit switch manufactured by Banner Engineering Corporation, designed for chassis mount applications with screw terminal connections. This component features a side rotary roller actuator and is rated for 6A at 120V AC operation. The product is currently obsolete, making identification of suitable substitute components essential for system maintenance, repair, and redesign applications where continued functionality is required.

Substiute Parts

SI-LM40LA18D

Banner Engineering CorporationIn Stock: 911SI-LM40LA18D Datasheet

Current PartRFQ

SI-LS83LA18D

Banner Engineering CorporationIn Stock: 997SI-LS83LA18D Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the SI-LM40LA18D is determined by the following critical parameters that must align between the original and substitute component:

Electrical Compatibility:

• Circuit configuration: DPST-NO/NC topology
• Current rating: Minimum 6A AC capability
• Voltage rating: 120V AC operation

Mechanical & Physical Compatibility:

• Termination style: Screw terminal connection
• Ingress protection: IP65 rating (dust tight, water resistant)
• Operating temperature range: -30°C to 80°C

Regulatory & Quality Standards:

• RoHS3 compliance
• Manufacturer: Banner Engineering Corporation

The SI-LS83LA18D meets these substitution criteria through equivalent electrical ratings, matching termination methodology, and identical environmental protection specifications.

Parameter Comparison

Engineering Selection Recommendations

The SI-LS83LA18D is the manufacturer-recommended substitute for the obsolete SI-LM40LA18D. Both components are manufactured by Banner Engineering Corporation and maintain electrical and mechanical parameter equivalence across all critical specifications.

The SI-LS83LA18D offers the advantage of active product status, ensuring continued availability and manufacturer support. The substitute component carries expanded regulatory approvals (CE, CSA, UL) compared to the original part, providing enhanced compliance documentation for applications requiring multi-regional certification.

The SI-LS83LA18D supports both AC and DC voltage operation at 120V, extending functional capability beyond the AC-only specification of the original SI-LM40LA18D while maintaining full backward compatibility for existing 120V AC applications.

Frequently Asked Questions (FAQ)

Q: Can the SI-LS83LA18D directly replace the SI-LM40LA18D in existing installations?

A: Yes. Both components share identical DPST-NO/NC circuit configuration, 6A AC current rating, 120V voltage rating, screw terminal termination, and IP65 ingress protection. Operating temperature ranges and mechanical specifications are equivalent.

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

A: The SI-LM40LA18D is obsolete, while the SI-LS83LA18D maintains active product status. The SI-LS83LA18D additionally supports DC voltage operation and carries CE, CSA, and UL regulatory approvals.

Q: Are there packaging differences between the original and substitute?

A: Both components are supplied in bulk packaging. Physical mounting and termination configurations are compatible.

Q: Does the SI-LS83LA18D maintain the same mechanical life specification?

A: The SI-LS83LA18D specifications provided do not include mechanical life data. Consult Banner Engineering Corporation technical documentation for detailed mechanical life ratings of the substitute component.

Q: What regulatory compliance should be verified for the substitute part?

A: The SI-LS83LA18D carries CE, CSA, and UL approvals. Verify that these certifications meet the requirements of your specific application and regional standards.