Honeywell 201LS151 Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The Honeywell 201LS151 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 actuator without lever, chassis mount termination, and IP67 ingress protection suitable for dust-tight and waterproof applications. The 201LS151 is classified as obsolete, making identification of active equivalent parts essential for ongoing procurement and system maintenance. The substitute part 201LS1 provides functional continuity with active product status while maintaining core electrical and mechanical specifications.

Substiute Parts

201LS151

Honeywell Sensing and Productivity SolutionsIn Stock: 1065201LS151 Datasheet

Current PartRFQ

201LS1

Honeywell Sensing and Productivity SolutionsIn Stock: 1298201LS1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution between the 201LS151 and 201LS1 is based on equivalence in the following critical parameters:

Electrical Equivalence:

• Identical SPDT circuit configuration
• Identical current ratings: 10A AC and 800mA DC
• Identical voltage ratings: 120V AC and 115V DC
• Identical switch function: On-Momentary operation

Mechanical Equivalence:

• Identical mounting type: Chassis Mount
• Identical termination style: Plug In
• Identical ingress protection: IP67 (Dust Tight, Waterproof)
• Identical operating force: 51gfm
• Identical release force: 8.640gfm
• Identical pretravel, differential travel, and overtravel specifications

Compliance Equivalence:

• Both RoHS Compliant
• Both MSL 1 (Unlimited)
• Both ECCN EAR99 classification

Distinguishing Differences: The 201LS1 features a steel roller front-mounted actuator, whereas the 201LS151 uses a side rotary actuator without lever. The 201LS1 operates across a slightly wider temperature range (-29°C to 71°C versus -40°C to 70°C). The 201LS1 maintains active product status with bulk packaging, while the 201LS151 is obsolete.

Parameter Comparison

Engineering Selection Recommendations

For Obsolete Part Replacement: The 201LS1 is the direct active equivalent for the obsolete 201LS151. Both components share identical electrical ratings, mechanical specifications, and compliance certifications. The 201LS1 is recommended for all new procurement and system redesigns requiring SPDT snap action switch functionality at 10A/120V AC specifications.

Product Status Consideration: The 201LS151 is classified as obsolete. The 201LS1 maintains active product status with confirmed inventory availability (1199 pcs), ensuring supply chain continuity and long-term component availability.

Compliance and Certification: Both parts are RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity rating and EAR99 export classification. No compliance barriers exist for substitution.

Actuator Design Difference: The 201LS1 incorporates a steel roller front-mounted actuator, while the 201LS151 uses a side rotary actuator without lever. This mechanical difference does not affect electrical performance but may impact physical installation geometry. Verify mounting space and actuator engagement requirements in the target application before final selection.

Temperature Range: The 201LS1 extends the upper operating temperature limit to 71°C compared to the 201LS151's 70°C maximum. Both parts operate at -29°C minimum or lower, with the 201LS151 rated to -40°C. For applications requiring operation below -29°C, the 201LS151 specifications apply; however, given its obsolete status, alternative component families should be evaluated.

Frequently Asked Questions (FAQ)

Q: Can the 201LS1 directly replace the 201LS151 in existing assemblies?

A: The 201LS1 provides electrical and functional equivalence with identical current, voltage, and circuit specifications. However, the actuator design differs (steel roller front-mounted versus side rotary without lever). Physical installation geometry must be verified to confirm mechanical compatibility with existing mounting provisions and actuator engagement surfaces.

Q: What is the primary reason for substituting the 201LS151?

A: The 201LS151 is classified as obsolete. The 201LS1 is the active equivalent part from Honeywell Sensing and Productivity Solutions, ensuring continued availability and supply chain reliability.

Q: Are there any electrical performance differences between these parts?

A: No. Both parts are rated for 10A AC at 120V and 800mA DC at 115V with identical SPDT circuit configuration, operating force, release force, and travel specifications.

Q: Does the actuator design change affect switch reliability?

A: Both actuators meet identical operating force (51gfm) and release force (8.640gfm) specifications. The steel roller design in the 201LS1 is a mechanical variation that does not alter electrical performance or reliability characteristics within the specified operating parameters.

Q: What is the temperature operating range difference?

A: The 201LS151 operates from -40°C to 70°C. The 201LS1 operates from -29°C to 71°C. For applications requiring operation below -29°C, the 201LS151 specifications apply; however, alternative active components should be evaluated given the obsolete status of the 201LS151.

Q: Are both parts RoHS compliant?

A: Yes. Both the 201LS151 and 201LS1 are RoHS Compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Q: What packaging is available for the 201LS1?

A: The 201LS1 is supplied in bulk packaging with 1199 pcs available in new original stock.

Q: Are there any export or regulatory restrictions?

A: Both parts are classified as EAR99 under export control regulations, indicating no specific licensing requirements for standard commercial applications.