Honeywell 201LS144 Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The Honeywell 201LS144 is a snap action switch with SPDT (Single Pole Double Throw) circuit configuration, rated for 10A AC at 120V and 800mA DC at 115V. This component features a side rotary roller actuator, chassis mount configuration, and IP67 ingress protection suitable for industrial control applications. The 201LS144 is classified as obsolete, necessitating identification of active equivalent parts to maintain supply chain continuity and support ongoing system maintenance and new installations.

Substiute Parts

201LS144

Honeywell Sensing and Productivity SolutionsIn Stock: 1197201LS144 Datasheet

Current PartRFQ

201LS1

Honeywell Sensing and Productivity SolutionsIn Stock: 1298201LS1 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 201LS144 is based on strict electrical and mechanical parameter matching within the Honeywell LS series. The substitute part must satisfy the following criteria:

Electrical Parameters (Non-Negotiable):

• SPDT circuit configuration (DB/DM)
• 10A AC current rating at 120V
• 800mA DC current rating at 115V
• On-Momentary switch function

Mechanical Parameters (Non-Negotiable):

• Side rotary roller actuator type
• Chassis mount configuration
• Plug-in termination style
• IP67 ingress protection rating

Operational Parameters (Non-Negotiable):

• Operating force: 51gfm
• Release force: 8.640gfm
• Operating position: 20°
• Pretravel: 20°
• Differential travel: 12°
• Overtravel: 30°
• Operating temperature range: -29°C to 71°C

Compliance Parameters:

• RoHS Compliant status
• Moisture Sensitivity Level 1

The 201LS1 satisfies all electrical, mechanical, operational, and compliance parameters, establishing it as a direct functional equivalent to the 201LS144.

Parameter Comparison

Engineering Selection Recommendations

The 201LS1 is the direct functional equivalent for the obsolete 201LS144. Selection of the 201LS1 is based on the following engineering criteria:

Electrical Equivalence: Both parts maintain identical current and voltage ratings across AC and DC operating conditions, ensuring compatibility with existing circuit designs and load requirements.

Mechanical Equivalence: Identical actuator type, mounting configuration, and termination style ensure direct mechanical interchangeability in existing installations without modification to mechanical interfaces or mounting hardware.

Operational Equivalence: All actuation parameters, including operating force, release force, and travel distances, are identical, ensuring consistent switch response characteristics in control applications.

Compliance Status: The 201LS1 maintains RoHS compliance and MSL 1 rating, meeting current regulatory requirements and environmental standards applicable to industrial control components.

Product Status Advantage: The 201LS1 is classified as active, ensuring ongoing availability, supply chain support, and manufacturer technical documentation. This status eliminates obsolescence risk associated with the 201LS144.

Packaging Consideration: The 201LS1 is supplied in bulk packaging, whereas the 201LS144 was supplied with standard packaging. Bulk packaging does not affect electrical or mechanical performance and is suitable for both individual component selection and volume procurement.

Frequently Asked Questions (FAQ)

Q: Can the 201LS1 be used as a direct replacement for the 201LS144 in existing installations?

A: Yes. The 201LS1 is electrically and mechanically equivalent to the 201LS144 across all specified parameters. Direct substitution is supported without circuit modification or mechanical redesign.

Q: Are there any differences in electrical performance between the 201LS144 and 201LS1?

A: No. Both parts are rated for 10A AC at 120V and 800mA DC at 115V with identical SPDT circuit configuration and On-Momentary switch function. Electrical performance is equivalent.

Q: What is the significance of the product status difference (Obsolete vs. Active)?

A: The 201LS144 is obsolete and no longer manufactured or supported by Honeywell. The 201LS1 is active and currently produced, ensuring continued availability, technical support, and supply chain reliability for new installations and maintenance applications.

Q: Does the bulk packaging of the 201LS1 affect its performance or compatibility?

A: No. Packaging format does not affect electrical or mechanical performance. Bulk packaging is a supply and logistics consideration only and does not impact component functionality or interchangeability.

Q: Are both parts RoHS compliant?

A: Yes. Both the 201LS144 and 201LS1 are RoHS compliant and carry MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and regulatory standards.

Q: What are the key parameters that determine substitution eligibility?

A: Substitution eligibility is determined by matching SPDT circuit configuration, 10A AC / 800mA DC current ratings, 120V AC / 115V DC voltage ratings, side rotary roller actuator type, chassis mount configuration, plug-in termination, IP67 ingress protection, and identical operational force and travel parameters.

Q: Is the 201LS1 available in the same quantity as the 201LS144?

A: The 201LS1 has 1199 pieces in stock compared to 1127 pieces for the 201LS144, providing adequate inventory availability for both new installations and replacement applications.