Honeywell 5LS8 Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The Honeywell 5LS8 is an SPDT snap action switch designed for chassis mount applications requiring 10A AC at 120V operation. This switch features a roller plunger actuator, screw terminal connections, and IP67 ingress protection suitable for dust-tight and waterproof environments. The product is active in production with 1193 units in current inventory stock.

Substitute parts are identified when equivalent electrical performance, mechanical compatibility, and environmental ratings align with the original specification, enabling direct replacement in applications where the primary part becomes unavailable or when design flexibility permits alternative actuator types or enhanced operational ranges.

Substiute Parts

5LS8

Honeywell Sensing and Productivity SolutionsIn Stock: 12455LS8 Datasheet

Current PartRFQ

D4B-2171N

Omron Automation and SafetyIn Stock: 1249D4B-2171N Datasheet

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D4B-4170N-NPT

Omron Automation and SafetyIn Stock: 1081D4B-4170N-NPT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the Honeywell 5LS8 is determined by strict alignment of the following critical parameters:

Primary Substitution Criteria:

• Circuit configuration: SPDT (DB/DM) topology
• Switch function: On-Mom operation
• AC current rating: 10A minimum
• AC voltage rating: 120V minimum
• Mounting type: Chassis Mount
• Termination style: Screw Terminal
• Ingress protection: IP67 minimum
• Actuator type: Roller Plunger or Round (Pin Plunger) acceptable for mechanical compatibility

Secondary Compatibility Factors:

• Operating temperature range must encompass or exceed the original specification
• RoHS compliance status must be active or compliant
• Moisture sensitivity level MSL 1 (Unlimited) required
• DC current and voltage ratings may vary provided AC ratings are met

The identified substitute parts (Omron D4B-2171N and D4B-4170N-NPT) satisfy all primary criteria. Both maintain SPDT circuit configuration, 10A AC at 120V operation, chassis mount design, screw terminal connections, and IP67 protection. Differences in DC ratings, actuator geometry, and extended temperature ranges represent enhancements rather than limitations for substitution purposes.

Parameter Comparison

Engineering Selection Recommendations

Omron D4B-2171N Selection Criteria:

The D4B-2171N maintains identical actuator geometry (roller plunger) to the Honeywell 5LS8, providing direct mechanical compatibility in applications where actuator type consistency is required. This part is ROHS3 compliant and active in production with 1178 units in inventory. The extended operating temperature range (-40°C to 80°C) and enhanced DC current rating (6A) provide operational margin beyond the original specification. Electrical life rating of 500,000 cycles and mechanical life of 30,000,000 cycles are documented.

Omron D4B-4170N-NPT Selection Criteria:

The D4B-4170N-NPT features a round pin plunger actuator, representing a mechanical variation from the original roller plunger design. This configuration is suitable for applications where actuator geometry differences do not impact mechanical interface requirements. The part maintains all critical AC electrical parameters (10A at 120V), chassis mount design, screw terminal connections, and IP67 protection. Extended temperature range and enhanced DC ratings apply. RoHS status is not applicable for this variant. Inventory availability is 1009 units.

Primary Selection Logic:

Both substitute parts satisfy mandatory electrical and environmental requirements. Selection between D4B-2171N and D4B-4170N-NPT depends on actuator type compatibility within the specific application. The D4B-2171N is preferred when roller plunger geometry must be preserved. The D4B-4170N-NPT is acceptable when mechanical interface permits pin plunger operation.

Frequently Asked Questions (FAQ)

Q: Can the Omron D4B-2171N directly replace the Honeywell 5LS8 in all applications?

A: The D4B-2171N satisfies all critical electrical parameters (10A AC at 120V), circuit configuration (SPDT), switch function (On-Mom), mounting type (chassis mount), termination style (screw terminal), and environmental protection (IP67). The identical roller plunger actuator type ensures mechanical compatibility. Substitution is valid provided the application does not require the specific DC voltage rating of 115V; the D4B-2171N operates at 30V DC maximum.

Q: What is the difference between the D4B-2171N and D4B-4170N-NPT?

A: Both parts maintain identical AC electrical ratings (10A at 120V), circuit topology (SPDT), and environmental protection (IP67). The primary difference is actuator type: the D4B-2171N uses a roller plunger, while the D4B-4170N-NPT uses a round pin plunger. Operating position also differs (1.890" versus 1.380"). Selection depends on mechanical interface requirements within the application.

Q: Are there differences in DC current handling between the Honeywell 5LS8 and substitute parts?

A: The Honeywell 5LS8 is rated for 800mA DC at 115V. Both Omron substitutes (D4B-2171N and D4B-4170N-NPT) are rated for 6A DC at 30V. For applications operating exclusively at AC 120V, DC rating differences are not relevant. For DC applications, the Omron parts provide higher current capacity but at lower voltage.

Q: Do the substitute parts have documented electrical and mechanical life ratings?

A: The Honeywell 5LS8 does not provide electrical or mechanical life specifications in the available data. Both Omron substitutes document 500,000 electrical cycles and 30,000,000 mechanical cycles, providing quantified reliability data for design life calculations.

Q: What is the temperature operating range difference?

A: The Honeywell 5LS8 operates from -29°C to 71°C. Both Omron substitutes extend this range to -40°C to 80°C, providing 11°C lower minimum and 9°C higher maximum operating temperatures. This extended range accommodates broader environmental conditions without performance degradation.

Q: Are all three parts RoHS compliant?

A: The Honeywell 5LS8 is RoHS Compliant. The Omron D4B-2171N is ROHS3 Compliant. The Omron D4B-4170N-NPT has RoHS status listed as not applicable. For applications requiring RoHS compliance certification, the D4B-2171N is the preferred substitute.

Q: What inventory levels are available for each part?

A: Honeywell 5LS8: 1193 units. Omron D4B-2171N: 1178 units. Omron D4B-4170N-NPT: 1009 units. All parts are in active production with current stock availability.