LSF5A Snap Action Switch - Equivalent & Substitute Parts

Part Overview

The LSF5A is an active-status snap action switch manufactured by Honeywell Sensing and Productivity Solutions. It is configured as a Single Pole Double Throw (SPDT) switch with a side roller plunger actuator, designed for chassis mount applications with plug-in termination. The switch is rated for 10A AC at 120V and 800mA DC at 115V, featuring a status indicator and operating force of 2720gf. This component is RoHS compliant and classified as Moisture Sensitivity Level 1 (unlimited shelf life).

Equivalent and substitute parts are identified when alternative manufacturers offer SPDT snap action switches with compatible electrical ratings, mechanical configurations, and mounting specifications that allow direct functional replacement in the same application circuit.

Substiute Parts

LSF5A

Honeywell Sensing and Productivity SolutionsIn Stock: 883LSF5A Datasheet

Current PartRFQ

D4A-3307-HN

Omron Automation and SafetyIn Stock: 908D4A-3307-HN Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the LSF5A is determined by the following criteria:

Primary Compatibility Requirements:

• Circuit type must be SPDT (DB/DM) configuration
• Switch function must be On-Momentary operation
• Actuator type must be side roller plunger
• Mounting type must be chassis mount
• AC current rating must support minimum 10A
• AC voltage rating must support minimum 120V
• RoHS compliance status must be active

Secondary Compatibility Factors:

• Operating temperature range must encompass or overlap the application environment
• Pretravel and differential travel specifications must be within acceptable mechanical tolerances
• Termination style may differ if the application circuit design permits (plug-in versus screw terminal)
• Ingress protection rating may exceed minimum requirements without affecting substitution validity

The D4A-3307-HN from Omron Automation and Safety meets the primary compatibility requirements as an SPDT snap action switch with side roller plunger actuator and chassis mount configuration. Both parts are active products with RoHS compliance.

Parameter Comparison

Engineering Selection Recommendations

LSF5A Selection Criteria:

• Primary choice when operating temperature minimum of -12°C is required
• Preferred when DC voltage rating of 115V is specified in the application circuit
• Recommended when plug-in termination is mandatory for the PCB or connector interface
• Suitable for applications where operating force of 2720gf is acceptable or required

D4A-3307-HN Selection Criteria:

• Acceptable substitute for AC-dominant applications operating between -10°C and 80°C
• Suitable when higher DC current capacity (6A versus 800mA) provides design margin
• Recommended when IP67 ingress protection is required for harsh or wet environments
• Compatible when screw terminal connection can be accommodated in the circuit design
• Appropriate when lower operating force (2000gf) is preferred for user actuation

Substitution Constraints:

• The D4A-3307-HN operating temperature minimum of -10°C does not satisfy applications requiring -12°C operation
• Termination style difference (plug-in versus screw terminal) requires circuit board or connector redesign
• Both parts are active products with current manufacturing support and RoHS compliance

Frequently Asked Questions (FAQ)

Q: Can the D4A-3307-HN directly replace the LSF5A without any modifications?

A: Direct mechanical and electrical substitution is possible for AC applications operating above -10°C. However, the termination style differs (screw terminal versus plug-in), requiring circuit board or connector interface modification. The operating temperature minimum of -10°C for the D4A-3307-HN does not cover the LSF5A specification of -12°C.

Q: What are the key electrical differences between these two switches?

A: Both switches are rated for 10A AC operation. The LSF5A is rated 120V AC and 115V DC. The D4A-3307-HN is rated 125V AC and 30V DC. For AC applications at or below 120V, both are equivalent. For DC applications, the LSF5A supports higher voltage (115V) while the D4A-3307-HN supports higher current (6A versus 800mA).

Q: Does the difference in operating force affect substitution?

A: The LSF5A requires 2720gf operating force while the D4A-3307-HN requires 2000gf. This 720gf difference affects actuator effort and may impact user experience or automated actuation systems. Application-specific testing is necessary if operating force is a critical design parameter.

Q: Are both switches suitable for outdoor or wet environments?

A: The D4A-3307-HN provides IP67 ingress protection (dust tight, waterproof). The LSF5A ingress protection rating is not specified. For applications requiring environmental sealing, the D4A-3307-HN offers documented protection.

Q: What is the mechanical travel difference between these switches?

A: Pretravel differs by 0.006" (0.1mm), and overtravel differs by 0.011" (0.3mm). Differential travel is identical at 0.025" (0.6mm). These differences are within typical mechanical tolerances and do not prevent substitution for standard applications.

Q: Can I use the D4A-3307-HN in a -12°C environment?

A: The D4A-3307-HN is specified for -10°C minimum operating temperature. Use in -12°C environments is outside the manufacturer's rated specification and requires application-specific validation.

Q: What inventory considerations apply to these parts?

A: LSF5A inventory is 804 pieces in stock. D4A-3307-HN inventory is 898 pieces in stock. Both are available as new original components in bulk packaging.