Honeywell V7-3A18D8 Snap Action Switch SPDT Equivalent & Substitute Parts

Part Overview

The Honeywell V7-3A18D8 is a snap action switch with Single Pole Double Throw (SPDT) circuit configuration, rated for 5A at 125V AC. This component features a round pin plunger actuator and chassis mount design with quick connect 0.187" termination. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations.

Substiute Parts

V7-3A18D8

Honeywell Sensing and Productivity SolutionsIn Stock: 1125V7-3A18D8 Datasheet

Current PartRFQ

83161806

CrouzetIn Stock: 78583161806 Datasheet

SimilarRFQ

LS085R100F100C1A

E-SwitchIn Stock: 998LS085R100F100C1A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the V7-3A18D8 snap action switch is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration (SPDT)
• Switch function (On-Momentary)
• Actuator type (Round pin plunger)
• Mounting type (Chassis mount)
• Termination style compatibility

Electrical Compatibility Criteria:

• Current rating must equal or exceed 5A AC
• Voltage rating must equal or exceed 125V AC
• Operating force and travel characteristics must align with application requirements

Mechanical Compatibility Criteria:

• Operating position of 0.579" (14.7mm) is standard across identified substitutes
• Mechanical life rating of 10,000,000 cycles or higher
• Temperature operating range must encompass -40°C to 85°C or broader

Regulatory Compliance:

• RoHS compliance status
• ECCN and HTSUS classifications

Two substitute parts meet the core SPDT snap action switch criteria with chassis mount configuration and round pin plunger actuation. The Crouzet 83161806 provides enhanced voltage rating (250V AC) and extended mechanical life (20,000,000 cycles). The E-Switch LS085R100F100C1A maintains identical termination style and operating position but operates at reduced voltage and current ratings suitable for low-voltage applications.

Parameter Comparison

Engineering Selection Recommendations

Crouzet 83161806 Substitution: The Crouzet 83161806 is an active product suitable for direct substitution in applications requiring SPDT snap action switching at 5A current rating. This part exceeds the voltage specification of the V7-3A18D8 (250V versus 125V AC), providing enhanced margin for higher-voltage system designs. The extended mechanical life rating of 20,000,000 cycles supports long-term reliability requirements. The termination style differs (0.250" versus 0.187"), requiring connector verification before implementation. Extended temperature range (-60°C to 150°C) accommodates broader environmental conditions. RoHS compliance and active product status ensure supply chain continuity and regulatory alignment.

E-Switch LS085R100F100C1A Substitution: The E-Switch LS085R100F100C1A maintains identical termination style (0.187" quick connect) and operating position (0.579") as the original V7-3A18D8. This part is suitable for low-voltage applications operating at 20V AC/DC maximum. Current rating is significantly reduced (0.4VA versus 5A), limiting application scope to signal-level switching. Mechanical life of 1,000,000 cycles is substantially lower than the original specification. ROHS3 compliance and active product status support modern supply chain requirements. This substitute is appropriate only for applications where voltage and current requirements do not exceed the LS085R100F100C1A ratings.

Selection Criteria Summary:

• For applications requiring 5A at 125V or higher: Crouzet 83161806
• For low-voltage signal switching (≤20V, ≤0.4VA): E-Switch LS085R100F100C1A
• Verify termination connector compatibility before final selection
• Confirm operating force and temperature range alignment with specific application requirements

Frequently Asked Questions (FAQ)

Q: Can the Crouzet 83161806 directly replace the Honeywell V7-3A18D8 in all applications?

A: The Crouzet 83161806 is electrically compatible for applications requiring 5A at 125V AC or lower. The primary consideration is termination style: the Crouzet uses 0.250" (6.3mm) quick connect terminals versus the Honeywell's 0.187" (4.7mm). Connector compatibility must be verified. Operating force differs (82gf versus 50gf), which may affect actuator feel and system response characteristics.

Q: What are the voltage and current limitations of the E-Switch LS085R100F100C1A?

A: The E-Switch LS085R100F100C1A is rated for 0.4VA at 20V AC/DC maximum. This part is not suitable for applications requiring 5A at 125V. It is appropriate only for low-voltage signal-level switching applications.

Q: Are all three parts RoHS compliant?

A: Yes. The Honeywell V7-3A18D8 is RoHS Compliant. The Crouzet 83161806 is RoHS Compliant. The E-Switch LS085R100F100C1A is ROHS3 Compliant. All parts meet RoHS regulatory requirements.

Q: What is the significance of the operating position specification of 0.579" (14.7mm)?

A: Operating position defines the plunger travel distance at which the switch actuates. All three parts share this identical specification, ensuring consistent mechanical interface and actuation behavior in applications designed for this travel distance.

Q: How do mechanical life ratings compare across the three parts?

A: The Honeywell V7-3A18D8 specifies 10,000,000 cycles. The Crouzet 83161806 specifies 20,000,000 cycles, providing extended service life. The E-Switch LS085R100F100C1A specifies 1,000,000 cycles, significantly lower than both alternatives.

Q: Which substitute part is recommended for new designs?

A: For new designs requiring 5A at 125V AC or higher, the Crouzet 83161806 is the active product with superior mechanical life and extended temperature range. Termination connector compatibility must be confirmed during design integration. For low-voltage applications, the E-Switch LS085R100F100C1A is suitable within its electrical ratings.

Q: What is the difference between electrical life and mechanical life?

A: Electrical life measures the number of switching cycles under electrical load before electrical performance degrades. Mechanical life measures the number of physical actuations before mechanical wear affects operation. The Crouzet 83161806 does not specify electrical life but provides extended mechanical life of 20,000,000 cycles.

Q: Are there packaging differences between these parts?

A: The Honeywell V7-3A18D8 is packaged in standard format with 1,081 pieces in stock. The Crouzet 83161806 is packaged in bulk format with 700 pieces in stock. The E-Switch LS085R100F100C1A is packaged in bulk format with 914 pieces in stock. Packaging format does not affect electrical or mechanical compatibility.