Honeywell 201LS503 Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The Honeywell 201LS503 is a snap action switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 10A at 120V AC. This component features a side rotary actuator with adjustable nylon roller, chassis mount termination, and IP67 ingress protection suitable for industrial control applications. The 201LS503 is classified as obsolete, necessitating identification of active equivalent components to maintain supply chain continuity and ensure long-term system reliability.

Substiute Parts

201LS503

Honeywell Sensing and Productivity SolutionsIn Stock: 964201LS503 Datasheet

Current PartRFQ

201LS3

Honeywell Sensing and Productivity SolutionsIn Stock: 759201LS3 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 201LS503 is determined by strict equivalence across the following critical parameters:

Circuit and Electrical Function: Both the main part and substitute must maintain SPDT (DB/DM) circuit configuration with On-Mom switch function to preserve control logic in existing applications.

Current and Voltage Ratings: The substitute must support minimum 10A at 120V AC to match the electrical load specifications of the original design.

Mechanical Interface: Actuator type (side rotary with adjustable roller), mounting method (chassis mount), and termination style (plug in) must remain identical to ensure physical compatibility without mechanical redesign.

Environmental Protection: IP67 ingress protection rating must be maintained for applications requiring dust-tight and waterproof operation.

Operating Conditions: Temperature range (-29°C to 71°C) and mechanical characteristics (operating force, pretravel, differential travel, overtravel) must align with the original specification.

The 201LS3 satisfies all substitution criteria as an active product within the same LS series, offering identical mechanical and electrical interface parameters while providing enhanced DC voltage capability.

Parameter Comparison

Engineering Selection Recommendations

The 201LS3 is the direct substitute for the obsolete 201LS503. Both components are manufactured by Honeywell Sensing and Productivity Solutions and share identical electrical, mechanical, and environmental specifications across all critical parameters.

Product Status Consideration: The 201LS503 is classified as obsolete, while the 201LS3 maintains active product status. Selection of the 201LS3 ensures continued availability and manufacturer support for future procurement requirements.

Compliance and Certification: Both parts maintain RoHS compliance and identical ECCN (EAR99) and HTSUS (8536.50.7000) classifications, ensuring regulatory equivalence for export and supply chain documentation.

Enhanced Capability: The 201LS3 provides additional DC voltage (115V) and DC current (800mA) ratings not specified in the 201LS503 datasheet. These supplementary ratings do not affect AC-only applications but extend the component's utility in mixed-signal control systems.

Mechanical and Electrical Interface: All mechanical characteristics, actuator specifications, mounting configurations, and electrical ratings remain unchanged, enabling direct substitution without circuit redesign or mechanical modification.

Frequently Asked Questions (FAQ)

Q: Can the 201LS3 be used as a direct replacement for the 201LS503 in existing assemblies?

A: Yes. The 201LS3 maintains identical SPDT circuit configuration, 10A/120V AC ratings, side rotary actuator with adjustable roller, chassis mount termination, IP67 protection, and all mechanical parameters. Direct substitution is supported without modification.

Q: What is the primary reason for substituting the 201LS503?

A: The 201LS503 is classified as obsolete. The 201LS3 is the active equivalent within the Honeywell LS series, ensuring long-term supply chain availability and manufacturer support.

Q: Are there packaging differences between the 201LS503 and 201LS3?

A: The 201LS503 is supplied in standard packaging, while the 201LS3 is available in bulk packaging. Both maintain identical component specifications and electrical performance.

Q: Does the 201LS3 support DC applications?

A: The 201LS3 is rated for 115V DC at 800mA, providing DC capability not specified in the 201LS503 documentation. AC applications remain the primary design intent, with DC ratings available for supplementary applications.

Q: Are RoHS and regulatory classifications identical between the two parts?

A: Yes. Both the 201LS503 and 201LS3 are RoHS compliant with identical ECCN (EAR99) and HTSUS (8536.50.7000) classifications.

Q: What mechanical parameters determine substitution compatibility?

A: Operating force (51gfm), release force (8.640gfm), operating position (20°), pretravel (20°), differential travel (12°), and overtravel (30°) must remain identical. The 201LS3 matches all these specifications.

Q: Is the operating temperature range the same for both components?

A: Yes. Both the 201LS503 and 201LS3 operate across -29°C to 71°C, ensuring thermal compatibility in equivalent applications.