Honeywell 4LS1-4PG Snap Action Switch: Equivalent & Substitute Parts

Part Overview

The Honeywell 4LS1-4PG is a snap action switch with SPDT (double-break/double-make) circuit configuration, rated for 10A AC at 120V and 800mA DC at 115V. This component features a side plunger actuator, chassis mount configuration, and screw terminal termination. The 4LS1-4PG is classified as obsolete, making identification of equivalent substitute parts essential for system maintenance, repair, and component sourcing. The active product variant 4LS1 provides direct functional equivalence with identical electrical and mechanical specifications.

Substiute Parts

4LS1-4PG

Honeywell Sensing and Productivity SolutionsIn Stock: 11224LS1-4PG Datasheet

Current PartRFQ

4LS1

Honeywell Sensing and Productivity SolutionsIn Stock: 7804LS1 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete 4LS1-4PG is determined by strict equivalence across all electrical and mechanical parameters. The substitute part must maintain identical specifications in the following critical categories:

Electrical Parameters: Circuit configuration (SPDT DB/DM), switch function (On-Momentary), current ratings (10A AC / 800mA DC), and voltage ratings (120V AC / 115V DC) must be identical.

Mechanical Parameters: Actuator type (side plunger), mounting configuration (chassis mount), termination style (screw terminal), and all travel specifications (operating position, pretravel, differential travel, overtravel) must match exactly.

Environmental & Compliance: Ingress protection rating (IP67), operating temperature range (-29°C to 71°C), RoHS compliance status, and MSL rating must be maintained.

The Honeywell 4LS1 qualifies as a direct substitute based on complete parameter alignment across all specified categories. The primary distinction is product status (active versus obsolete) and packaging format (bulk versus original packaging).

Parameter Comparison

Engineering Selection Recommendations

The Honeywell 4LS1 is the direct functional equivalent for the obsolete 4LS1-4PG. Selection of the 4LS1 substitute is based on the following engineering criteria:

Product Status: The 4LS1 maintains active product status with current manufacturing support, ensuring long-term availability and supply chain continuity. The 4LS1-4PG is classified as obsolete, creating sourcing constraints for new applications and system replacements.

Compliance & Certification: Both parts maintain identical RoHS compliance status and MSL rating (1 - Unlimited), ensuring compatibility with current environmental and reliability standards. No additional qualification or testing is required based on compliance parameters.

Electrical & Mechanical Equivalence: All electrical ratings, mechanical specifications, and operational characteristics are identical between the main part and substitute. Direct pin-for-pin and functional compatibility is established.

Packaging Consideration: The 4LS1 is supplied in bulk packaging, whereas the 4LS1-4PG was supplied in original packaging. Bulk packaging does not affect component functionality or performance; this distinction is relevant only for inventory management and procurement processes.

Frequently Asked Questions (FAQ)

Q: Can the Honeywell 4LS1 directly replace the 4LS1-4PG in existing applications?

A: Yes. The 4LS1 provides complete functional equivalence. All electrical parameters (10A AC at 120V, 800mA DC at 115V), circuit configuration (SPDT), mechanical specifications (side plunger actuator, chassis mount, screw terminal), and environmental ratings (IP67, -29°C to 71°C operating range) are identical. Direct substitution is supported without circuit modification or system redesign.

Q: What is the difference between the 4LS1-4PG and 4LS1 part numbers?

A: The primary difference is product status and packaging. The 4LS1-4PG is obsolete and was supplied in original packaging. The 4LS1 is an active product supplied in bulk packaging. The "-4PG" suffix in the original part number indicates the specific packaging configuration. Functionally and electrically, both parts are identical.

Q: Are there any compliance or certification differences between these parts?

A: No. Both the 4LS1-4PG and 4LS1 maintain identical RoHS compliance status and MSL rating (1 - Unlimited). No additional qualification or testing is required when substituting the 4LS1 for the obsolete 4LS1-4PG.

Q: What are the critical parameters that define substitution eligibility for this switch?

A: Substitution eligibility is determined by equivalence in: circuit configuration (SPDT DB/DM), switch function (On-Momentary), current ratings (10A AC / 800mA DC), voltage ratings (120V AC / 115V DC), actuator type (side plunger), mounting type (chassis mount), termination style (screw terminal), ingress protection rating (IP67), and all mechanical travel specifications (operating position, pretravel, differential travel, overtravel).

Q: Is the bulk packaging of the 4LS1 suitable for production environments?

A: Yes. Bulk packaging is standard for production and high-volume applications. The packaging format does not affect component performance, reliability, or electrical characteristics. Packaging selection is determined by procurement requirements and inventory management practices.

Q: What is the operating force specification, and why is it important for substitution?

A: The operating force is 4082gf (gram-force), with a release force of 907gf. These specifications define the mechanical actuation characteristics of the side plunger. Identical operating and release force values between the 4LS1-4PG and 4LS1 ensure consistent tactile feedback and system response in applications requiring specific actuation force profiles.